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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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4 -- --
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5 -- S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S --
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6 -- --
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7 -- B o d y --
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8 -- --
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145
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNARL is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNARL was developed by the GNARL team at Florida State University. --
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28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This is a HP-UX DCE threads (HPUX 10) version of this package
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33
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34 -- This package contains all the GNULL primitives that interface directly with
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35 -- the underlying OS.
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36
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37 pragma Polling (Off);
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38 -- Turn off polling, we do not want ATC polling to take place during tasking
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39 -- operations. It causes infinite loops and other problems.
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40
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41 with Ada.Unchecked_Conversion;
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42
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43 with Interfaces.C;
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44
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45 with System.Tasking.Debug;
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46 with System.Interrupt_Management;
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47 with System.OS_Constants;
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48 with System.OS_Primitives;
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49 with System.Task_Primitives.Interrupt_Operations;
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50
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51 pragma Warnings (Off);
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52 with System.Interrupt_Management.Operations;
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53 pragma Elaborate_All (System.Interrupt_Management.Operations);
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54 pragma Warnings (On);
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55
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56 with System.Soft_Links;
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57 -- We use System.Soft_Links instead of System.Tasking.Initialization
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58 -- because the later is a higher level package that we shouldn't depend on.
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59 -- For example when using the restricted run time, it is replaced by
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60 -- System.Tasking.Restricted.Stages.
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61
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62 package body System.Task_Primitives.Operations is
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63
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64 package OSC renames System.OS_Constants;
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65 package SSL renames System.Soft_Links;
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66
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67 use System.Tasking.Debug;
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68 use System.Tasking;
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69 use Interfaces.C;
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70 use System.OS_Interface;
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71 use System.Parameters;
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72 use System.OS_Primitives;
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73
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74 package PIO renames System.Task_Primitives.Interrupt_Operations;
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75
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76 ----------------
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77 -- Local Data --
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78 ----------------
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79
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80 -- The followings are logically constants, but need to be initialized
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81 -- at run time.
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82
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83 Single_RTS_Lock : aliased RTS_Lock;
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84 -- This is a lock to allow only one thread of control in the RTS at
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85 -- a time; it is used to execute in mutual exclusion from all other tasks.
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86 -- Used mainly in Single_Lock mode, but also to protect All_Tasks_List
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87
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88 Environment_Task_Id : Task_Id;
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89 -- A variable to hold Task_Id for the environment task
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90
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91 Unblocked_Signal_Mask : aliased sigset_t;
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92 -- The set of signals that should unblocked in all tasks
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93
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94 Time_Slice_Val : Integer;
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95 pragma Import (C, Time_Slice_Val, "__gl_time_slice_val");
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96
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97 Dispatching_Policy : Character;
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98 pragma Import (C, Dispatching_Policy, "__gl_task_dispatching_policy");
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99
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100 -- Note: the reason that Locking_Policy is not needed is that this
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101 -- is not implemented for DCE threads. The HPUX 10 port is at this
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102 -- stage considered dead, and no further work is planned on it.
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103
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104 Foreign_Task_Elaborated : aliased Boolean := True;
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105 -- Used to identified fake tasks (i.e., non-Ada Threads)
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106
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107 --------------------
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108 -- Local Packages --
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109 --------------------
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110
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111 package Specific is
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112
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113 procedure Initialize (Environment_Task : Task_Id);
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114 pragma Inline (Initialize);
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115 -- Initialize various data needed by this package
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116
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117 function Is_Valid_Task return Boolean;
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118 pragma Inline (Is_Valid_Task);
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119 -- Does the executing thread have a TCB?
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120
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121 procedure Set (Self_Id : Task_Id);
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122 pragma Inline (Set);
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123 -- Set the self id for the current task
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124
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125 function Self return Task_Id;
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126 pragma Inline (Self);
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127 -- Return a pointer to the Ada Task Control Block of the calling task
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128
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129 end Specific;
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130
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131 package body Specific is separate;
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132 -- The body of this package is target specific
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133
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134 ----------------------------------
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135 -- ATCB allocation/deallocation --
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136 ----------------------------------
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137
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138 package body ATCB_Allocation is separate;
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139 -- The body of this package is shared across several targets
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140
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141 ---------------------------------
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142 -- Support for foreign threads --
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143 ---------------------------------
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144
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145 function Register_Foreign_Thread (Thread : Thread_Id) return Task_Id;
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146 -- Allocate and Initialize a new ATCB for the current Thread
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147
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148 function Register_Foreign_Thread
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149 (Thread : Thread_Id) return Task_Id is separate;
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150
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151 -----------------------
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152 -- Local Subprograms --
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153 -----------------------
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154
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155 procedure Abort_Handler (Sig : Signal);
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156
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157 function To_Address is
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158 new Ada.Unchecked_Conversion (Task_Id, System.Address);
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159
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160 -------------------
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161 -- Abort_Handler --
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162 -------------------
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163
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164 procedure Abort_Handler (Sig : Signal) is
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165 pragma Unreferenced (Sig);
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166
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167 Self_Id : constant Task_Id := Self;
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168 Result : Interfaces.C.int;
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169 Old_Set : aliased sigset_t;
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170
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171 begin
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172 if Self_Id.Deferral_Level = 0
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173 and then Self_Id.Pending_ATC_Level < Self_Id.ATC_Nesting_Level
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174 and then not Self_Id.Aborting
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175 then
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176 Self_Id.Aborting := True;
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177
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178 -- Make sure signals used for RTS internal purpose are unmasked
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179
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180 Result :=
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181 pthread_sigmask
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182 (SIG_UNBLOCK,
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183 Unblocked_Signal_Mask'Access,
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184 Old_Set'Access);
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185 pragma Assert (Result = 0);
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186
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187 raise Standard'Abort_Signal;
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188 end if;
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189 end Abort_Handler;
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190
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191 -----------------
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192 -- Stack_Guard --
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193 -----------------
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194
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195 -- The underlying thread system sets a guard page at the bottom of a thread
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196 -- stack, so nothing is needed.
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197 -- ??? Check the comment above
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198
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199 procedure Stack_Guard (T : ST.Task_Id; On : Boolean) is
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200 pragma Unreferenced (T, On);
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201 begin
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202 null;
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203 end Stack_Guard;
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204
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205 -------------------
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206 -- Get_Thread_Id --
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207 -------------------
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208
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209 function Get_Thread_Id (T : ST.Task_Id) return OSI.Thread_Id is
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210 begin
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211 return T.Common.LL.Thread;
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212 end Get_Thread_Id;
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213
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214 ----------
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215 -- Self --
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216 ----------
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217
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218 function Self return Task_Id renames Specific.Self;
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219
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220 ---------------------
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221 -- Initialize_Lock --
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222 ---------------------
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223
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224 -- Note: mutexes and cond_variables needed per-task basis are initialized
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225 -- in Initialize_TCB and the Storage_Error is handled. Other mutexes (such
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226 -- as RTS_Lock, Memory_Lock...) used in RTS is initialized before any
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227 -- status change of RTS. Therefore raising Storage_Error in the following
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228 -- routines should be able to be handled safely.
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229
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230 procedure Initialize_Lock
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231 (Prio : System.Any_Priority;
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232 L : not null access Lock)
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233 is
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234 Attributes : aliased pthread_mutexattr_t;
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235 Result : Interfaces.C.int;
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236
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237 begin
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238 Result := pthread_mutexattr_init (Attributes'Access);
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239 pragma Assert (Result = 0 or else Result = ENOMEM);
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240
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241 if Result = ENOMEM then
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242 raise Storage_Error;
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243 end if;
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244
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245 L.Priority := Prio;
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246
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247 Result := pthread_mutex_init (L.L'Access, Attributes'Access);
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248 pragma Assert (Result = 0 or else Result = ENOMEM);
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249
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250 if Result = ENOMEM then
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251 raise Storage_Error;
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252 end if;
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253
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254 Result := pthread_mutexattr_destroy (Attributes'Access);
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255 pragma Assert (Result = 0);
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256 end Initialize_Lock;
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257
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258 procedure Initialize_Lock
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259 (L : not null access RTS_Lock;
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260 Level : Lock_Level)
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261 is
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262 pragma Unreferenced (Level);
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263
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264 Attributes : aliased pthread_mutexattr_t;
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265 Result : Interfaces.C.int;
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266
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267 begin
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268 Result := pthread_mutexattr_init (Attributes'Access);
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269 pragma Assert (Result = 0 or else Result = ENOMEM);
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270
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271 if Result = ENOMEM then
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272 raise Storage_Error;
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273 end if;
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274
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275 Result := pthread_mutex_init (L, Attributes'Access);
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276
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277 pragma Assert (Result = 0 or else Result = ENOMEM);
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278
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279 if Result = ENOMEM then
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280 raise Storage_Error;
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281 end if;
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282
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283 Result := pthread_mutexattr_destroy (Attributes'Access);
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284 pragma Assert (Result = 0);
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285 end Initialize_Lock;
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286
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287 -------------------
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288 -- Finalize_Lock --
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289 -------------------
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290
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291 procedure Finalize_Lock (L : not null access Lock) is
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292 Result : Interfaces.C.int;
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293 begin
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294 Result := pthread_mutex_destroy (L.L'Access);
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295 pragma Assert (Result = 0);
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296 end Finalize_Lock;
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297
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298 procedure Finalize_Lock (L : not null access RTS_Lock) is
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299 Result : Interfaces.C.int;
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300 begin
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301 Result := pthread_mutex_destroy (L);
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302 pragma Assert (Result = 0);
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303 end Finalize_Lock;
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304
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305 ----------------
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306 -- Write_Lock --
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307 ----------------
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308
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309 procedure Write_Lock
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310 (L : not null access Lock;
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311 Ceiling_Violation : out Boolean)
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312 is
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313 Result : Interfaces.C.int;
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314
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315 begin
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316 L.Owner_Priority := Get_Priority (Self);
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317
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318 if L.Priority < L.Owner_Priority then
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319 Ceiling_Violation := True;
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320 return;
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321 end if;
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322
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323 Result := pthread_mutex_lock (L.L'Access);
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324 pragma Assert (Result = 0);
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325 Ceiling_Violation := False;
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326 end Write_Lock;
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327
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328 procedure Write_Lock
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329 (L : not null access RTS_Lock;
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330 Global_Lock : Boolean := False)
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331 is
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332 Result : Interfaces.C.int;
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333 begin
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334 if not Single_Lock or else Global_Lock then
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335 Result := pthread_mutex_lock (L);
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336 pragma Assert (Result = 0);
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337 end if;
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338 end Write_Lock;
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339
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340 procedure Write_Lock (T : Task_Id) is
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341 Result : Interfaces.C.int;
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342 begin
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343 if not Single_Lock then
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344 Result := pthread_mutex_lock (T.Common.LL.L'Access);
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345 pragma Assert (Result = 0);
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346 end if;
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347 end Write_Lock;
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348
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349 ---------------
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350 -- Read_Lock --
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351 ---------------
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352
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353 procedure Read_Lock
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354 (L : not null access Lock;
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355 Ceiling_Violation : out Boolean)
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356 is
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357 begin
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358 Write_Lock (L, Ceiling_Violation);
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359 end Read_Lock;
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360
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361 ------------
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362 -- Unlock --
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363 ------------
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364
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365 procedure Unlock (L : not null access Lock) is
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366 Result : Interfaces.C.int;
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367 begin
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368 Result := pthread_mutex_unlock (L.L'Access);
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369 pragma Assert (Result = 0);
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370 end Unlock;
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371
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372 procedure Unlock
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373 (L : not null access RTS_Lock;
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374 Global_Lock : Boolean := False)
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375 is
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376 Result : Interfaces.C.int;
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377 begin
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378 if not Single_Lock or else Global_Lock then
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379 Result := pthread_mutex_unlock (L);
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380 pragma Assert (Result = 0);
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381 end if;
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382 end Unlock;
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383
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384 procedure Unlock (T : Task_Id) is
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385 Result : Interfaces.C.int;
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386 begin
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387 if not Single_Lock then
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388 Result := pthread_mutex_unlock (T.Common.LL.L'Access);
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389 pragma Assert (Result = 0);
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390 end if;
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391 end Unlock;
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392
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393 -----------------
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394 -- Set_Ceiling --
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395 -----------------
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396
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397 -- Dynamic priority ceilings are not supported by the underlying system
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398
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399 procedure Set_Ceiling
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400 (L : not null access Lock;
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401 Prio : System.Any_Priority)
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402 is
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403 pragma Unreferenced (L, Prio);
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404 begin
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405 null;
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406 end Set_Ceiling;
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407
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408 -----------
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409 -- Sleep --
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410 -----------
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411
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412 procedure Sleep
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413 (Self_ID : Task_Id;
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414 Reason : System.Tasking.Task_States)
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415 is
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416 pragma Unreferenced (Reason);
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417
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418 Result : Interfaces.C.int;
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419
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420 begin
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421 Result :=
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422 pthread_cond_wait
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423 (cond => Self_ID.Common.LL.CV'Access,
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424 mutex => (if Single_Lock
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425 then Single_RTS_Lock'Access
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426 else Self_ID.Common.LL.L'Access));
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427
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428 -- EINTR is not considered a failure
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429
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430 pragma Assert (Result = 0 or else Result = EINTR);
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431 end Sleep;
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432
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433 -----------------
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434 -- Timed_Sleep --
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435 -----------------
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436
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437 procedure Timed_Sleep
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438 (Self_ID : Task_Id;
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439 Time : Duration;
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440 Mode : ST.Delay_Modes;
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441 Reason : System.Tasking.Task_States;
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442 Timedout : out Boolean;
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443 Yielded : out Boolean)
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444 is
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445 pragma Unreferenced (Reason);
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446
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447 Check_Time : constant Duration := Monotonic_Clock;
|
|
|
448 Abs_Time : Duration;
|
|
|
449 Request : aliased timespec;
|
|
|
450 Result : Interfaces.C.int;
|
|
|
451
|
|
|
452 begin
|
|
|
453 Timedout := True;
|
|
|
454 Yielded := False;
|
|
|
455
|
|
|
456 Abs_Time :=
|
|
|
457 (if Mode = Relative
|
|
|
458 then Duration'Min (Time, Max_Sensible_Delay) + Check_Time
|
|
|
459 else Duration'Min (Check_Time + Max_Sensible_Delay, Time));
|
|
|
460
|
|
|
461 if Abs_Time > Check_Time then
|
|
|
462 Request := To_Timespec (Abs_Time);
|
|
|
463
|
|
|
464 loop
|
|
|
465 exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level;
|
|
|
466
|
|
|
467 Result :=
|
|
|
468 pthread_cond_timedwait
|
|
|
469 (cond => Self_ID.Common.LL.CV'Access,
|
|
|
470 mutex => (if Single_Lock
|
|
|
471 then Single_RTS_Lock'Access
|
|
|
472 else Self_ID.Common.LL.L'Access),
|
|
|
473 abstime => Request'Access);
|
|
|
474
|
|
|
475 exit when Abs_Time <= Monotonic_Clock;
|
|
|
476
|
|
|
477 if Result = 0 or Result = EINTR then
|
|
|
478
|
|
|
479 -- Somebody may have called Wakeup for us
|
|
|
480
|
|
|
481 Timedout := False;
|
|
|
482 exit;
|
|
|
483 end if;
|
|
|
484
|
|
|
485 pragma Assert (Result = ETIMEDOUT);
|
|
|
486 end loop;
|
|
|
487 end if;
|
|
|
488 end Timed_Sleep;
|
|
|
489
|
|
|
490 -----------------
|
|
|
491 -- Timed_Delay --
|
|
|
492 -----------------
|
|
|
493
|
|
|
494 procedure Timed_Delay
|
|
|
495 (Self_ID : Task_Id;
|
|
|
496 Time : Duration;
|
|
|
497 Mode : ST.Delay_Modes)
|
|
|
498 is
|
|
|
499 Check_Time : constant Duration := Monotonic_Clock;
|
|
|
500 Abs_Time : Duration;
|
|
|
501 Request : aliased timespec;
|
|
|
502
|
|
|
503 Result : Interfaces.C.int;
|
|
|
504 pragma Warnings (Off, Result);
|
|
|
505
|
|
|
506 begin
|
|
|
507 if Single_Lock then
|
|
|
508 Lock_RTS;
|
|
|
509 end if;
|
|
|
510
|
|
|
511 Write_Lock (Self_ID);
|
|
|
512
|
|
|
513 Abs_Time :=
|
|
|
514 (if Mode = Relative
|
|
|
515 then Time + Check_Time
|
|
|
516 else Duration'Min (Check_Time + Max_Sensible_Delay, Time));
|
|
|
517
|
|
|
518 if Abs_Time > Check_Time then
|
|
|
519 Request := To_Timespec (Abs_Time);
|
|
|
520 Self_ID.Common.State := Delay_Sleep;
|
|
|
521
|
|
|
522 loop
|
|
|
523 exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level;
|
|
|
524
|
|
|
525 Result :=
|
|
|
526 pthread_cond_timedwait
|
|
|
527 (cond => Self_ID.Common.LL.CV'Access,
|
|
|
528 mutex => (if Single_Lock
|
|
|
529 then Single_RTS_Lock'Access
|
|
|
530 else Self_ID.Common.LL.L'Access),
|
|
|
531 abstime => Request'Access);
|
|
|
532
|
|
|
533 exit when Abs_Time <= Monotonic_Clock;
|
|
|
534
|
|
|
535 pragma Assert (Result = 0 or else
|
|
|
536 Result = ETIMEDOUT or else
|
|
|
537 Result = EINTR);
|
|
|
538 end loop;
|
|
|
539
|
|
|
540 Self_ID.Common.State := Runnable;
|
|
|
541 end if;
|
|
|
542
|
|
|
543 Unlock (Self_ID);
|
|
|
544
|
|
|
545 if Single_Lock then
|
|
|
546 Unlock_RTS;
|
|
|
547 end if;
|
|
|
548
|
|
|
549 Result := sched_yield;
|
|
|
550 end Timed_Delay;
|
|
|
551
|
|
|
552 ---------------------
|
|
|
553 -- Monotonic_Clock --
|
|
|
554 ---------------------
|
|
|
555
|
|
|
556 function Monotonic_Clock return Duration is
|
|
|
557 TS : aliased timespec;
|
|
|
558 Result : Interfaces.C.int;
|
|
|
559 begin
|
|
|
560 Result := Clock_Gettime (OSC.CLOCK_RT_Ada, TS'Unchecked_Access);
|
|
|
561 pragma Assert (Result = 0);
|
|
|
562 return To_Duration (TS);
|
|
|
563 end Monotonic_Clock;
|
|
|
564
|
|
|
565 -------------------
|
|
|
566 -- RT_Resolution --
|
|
|
567 -------------------
|
|
|
568
|
|
|
569 function RT_Resolution return Duration is
|
|
|
570 begin
|
|
|
571 return 10#1.0#E-6;
|
|
|
572 end RT_Resolution;
|
|
|
573
|
|
|
574 ------------
|
|
|
575 -- Wakeup --
|
|
|
576 ------------
|
|
|
577
|
|
|
578 procedure Wakeup (T : Task_Id; Reason : System.Tasking.Task_States) is
|
|
|
579 pragma Unreferenced (Reason);
|
|
|
580 Result : Interfaces.C.int;
|
|
|
581 begin
|
|
|
582 Result := pthread_cond_signal (T.Common.LL.CV'Access);
|
|
|
583 pragma Assert (Result = 0);
|
|
|
584 end Wakeup;
|
|
|
585
|
|
|
586 -----------
|
|
|
587 -- Yield --
|
|
|
588 -----------
|
|
|
589
|
|
|
590 procedure Yield (Do_Yield : Boolean := True) is
|
|
|
591 Result : Interfaces.C.int;
|
|
|
592 pragma Unreferenced (Result);
|
|
|
593 begin
|
|
|
594 if Do_Yield then
|
|
|
595 Result := sched_yield;
|
|
|
596 end if;
|
|
|
597 end Yield;
|
|
|
598
|
|
|
599 ------------------
|
|
|
600 -- Set_Priority --
|
|
|
601 ------------------
|
|
|
602
|
|
|
603 type Prio_Array_Type is array (System.Any_Priority) of Integer;
|
|
|
604 pragma Atomic_Components (Prio_Array_Type);
|
|
|
605
|
|
|
606 Prio_Array : Prio_Array_Type;
|
|
|
607 -- Global array containing the id of the currently running task for
|
|
|
608 -- each priority.
|
|
|
609 --
|
|
|
610 -- Note: assume we are on single processor with run-til-blocked scheduling
|
|
|
611
|
|
|
612 procedure Set_Priority
|
|
|
613 (T : Task_Id;
|
|
|
614 Prio : System.Any_Priority;
|
|
|
615 Loss_Of_Inheritance : Boolean := False)
|
|
|
616 is
|
|
|
617 Result : Interfaces.C.int;
|
|
|
618 Array_Item : Integer;
|
|
|
619 Param : aliased struct_sched_param;
|
|
|
620
|
|
|
621 function Get_Policy (Prio : System.Any_Priority) return Character;
|
|
|
622 pragma Import (C, Get_Policy, "__gnat_get_specific_dispatching");
|
|
|
623 -- Get priority specific dispatching policy
|
|
|
624
|
|
|
625 Priority_Specific_Policy : constant Character := Get_Policy (Prio);
|
|
|
626 -- Upper case first character of the policy name corresponding to the
|
|
|
627 -- task as set by a Priority_Specific_Dispatching pragma.
|
|
|
628
|
|
|
629 begin
|
|
|
630 Param.sched_priority := Interfaces.C.int (Underlying_Priorities (Prio));
|
|
|
631
|
|
|
632 if Dispatching_Policy = 'R'
|
|
|
633 or else Priority_Specific_Policy = 'R'
|
|
|
634 or else Time_Slice_Val > 0
|
|
|
635 then
|
|
|
636 Result :=
|
|
|
637 pthread_setschedparam
|
|
|
638 (T.Common.LL.Thread, SCHED_RR, Param'Access);
|
|
|
639
|
|
|
640 elsif Dispatching_Policy = 'F'
|
|
|
641 or else Priority_Specific_Policy = 'F'
|
|
|
642 or else Time_Slice_Val = 0
|
|
|
643 then
|
|
|
644 Result :=
|
|
|
645 pthread_setschedparam
|
|
|
646 (T.Common.LL.Thread, SCHED_FIFO, Param'Access);
|
|
|
647
|
|
|
648 else
|
|
|
649 Result :=
|
|
|
650 pthread_setschedparam
|
|
|
651 (T.Common.LL.Thread, SCHED_OTHER, Param'Access);
|
|
|
652 end if;
|
|
|
653
|
|
|
654 pragma Assert (Result = 0);
|
|
|
655
|
|
|
656 if Dispatching_Policy = 'F' or else Priority_Specific_Policy = 'F' then
|
|
|
657
|
|
|
658 -- Annex D requirement [RM D.2.2 par. 9]:
|
|
|
659 -- If the task drops its priority due to the loss of inherited
|
|
|
660 -- priority, it is added at the head of the ready queue for its
|
|
|
661 -- new active priority.
|
|
|
662
|
|
|
663 if Loss_Of_Inheritance
|
|
|
664 and then Prio < T.Common.Current_Priority
|
|
|
665 then
|
|
|
666 Array_Item := Prio_Array (T.Common.Base_Priority) + 1;
|
|
|
667 Prio_Array (T.Common.Base_Priority) := Array_Item;
|
|
|
668
|
|
|
669 loop
|
|
|
670 -- Let some processes a chance to arrive
|
|
|
671
|
|
|
672 Yield;
|
|
|
673
|
|
|
674 -- Then wait for our turn to proceed
|
|
|
675
|
|
|
676 exit when Array_Item = Prio_Array (T.Common.Base_Priority)
|
|
|
677 or else Prio_Array (T.Common.Base_Priority) = 1;
|
|
|
678 end loop;
|
|
|
679
|
|
|
680 Prio_Array (T.Common.Base_Priority) :=
|
|
|
681 Prio_Array (T.Common.Base_Priority) - 1;
|
|
|
682 end if;
|
|
|
683 end if;
|
|
|
684
|
|
|
685 T.Common.Current_Priority := Prio;
|
|
|
686 end Set_Priority;
|
|
|
687
|
|
|
688 ------------------
|
|
|
689 -- Get_Priority --
|
|
|
690 ------------------
|
|
|
691
|
|
|
692 function Get_Priority (T : Task_Id) return System.Any_Priority is
|
|
|
693 begin
|
|
|
694 return T.Common.Current_Priority;
|
|
|
695 end Get_Priority;
|
|
|
696
|
|
|
697 ----------------
|
|
|
698 -- Enter_Task --
|
|
|
699 ----------------
|
|
|
700
|
|
|
701 procedure Enter_Task (Self_ID : Task_Id) is
|
|
|
702 begin
|
|
|
703 Self_ID.Common.LL.Thread := pthread_self;
|
|
|
704 Specific.Set (Self_ID);
|
|
|
705 end Enter_Task;
|
|
|
706
|
|
|
707 -------------------
|
|
|
708 -- Is_Valid_Task --
|
|
|
709 -------------------
|
|
|
710
|
|
|
711 function Is_Valid_Task return Boolean renames Specific.Is_Valid_Task;
|
|
|
712
|
|
|
713 -----------------------------
|
|
|
714 -- Register_Foreign_Thread --
|
|
|
715 -----------------------------
|
|
|
716
|
|
|
717 function Register_Foreign_Thread return Task_Id is
|
|
|
718 begin
|
|
|
719 if Is_Valid_Task then
|
|
|
720 return Self;
|
|
|
721 else
|
|
|
722 return Register_Foreign_Thread (pthread_self);
|
|
|
723 end if;
|
|
|
724 end Register_Foreign_Thread;
|
|
|
725
|
|
|
726 --------------------
|
|
|
727 -- Initialize_TCB --
|
|
|
728 --------------------
|
|
|
729
|
|
|
730 procedure Initialize_TCB (Self_ID : Task_Id; Succeeded : out Boolean) is
|
|
|
731 Mutex_Attr : aliased pthread_mutexattr_t;
|
|
|
732 Result : Interfaces.C.int;
|
|
|
733 Cond_Attr : aliased pthread_condattr_t;
|
|
|
734
|
|
|
735 begin
|
|
|
736 if not Single_Lock then
|
|
|
737 Result := pthread_mutexattr_init (Mutex_Attr'Access);
|
|
|
738 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
739
|
|
|
740 if Result = 0 then
|
|
|
741 Result :=
|
|
|
742 pthread_mutex_init
|
|
|
743 (Self_ID.Common.LL.L'Access, Mutex_Attr'Access);
|
|
|
744 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
745 end if;
|
|
|
746
|
|
|
747 if Result /= 0 then
|
|
|
748 Succeeded := False;
|
|
|
749 return;
|
|
|
750 end if;
|
|
|
751
|
|
|
752 Result := pthread_mutexattr_destroy (Mutex_Attr'Access);
|
|
|
753 pragma Assert (Result = 0);
|
|
|
754 end if;
|
|
|
755
|
|
|
756 Result := pthread_condattr_init (Cond_Attr'Access);
|
|
|
757 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
758
|
|
|
759 if Result = 0 then
|
|
|
760 Result :=
|
|
|
761 pthread_cond_init
|
|
|
762 (Self_ID.Common.LL.CV'Access,
|
|
|
763 Cond_Attr'Access);
|
|
|
764 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
765 end if;
|
|
|
766
|
|
|
767 if Result = 0 then
|
|
|
768 Succeeded := True;
|
|
|
769 else
|
|
|
770 if not Single_Lock then
|
|
|
771 Result := pthread_mutex_destroy (Self_ID.Common.LL.L'Access);
|
|
|
772 pragma Assert (Result = 0);
|
|
|
773 end if;
|
|
|
774
|
|
|
775 Succeeded := False;
|
|
|
776 end if;
|
|
|
777
|
|
|
778 Result := pthread_condattr_destroy (Cond_Attr'Access);
|
|
|
779 pragma Assert (Result = 0);
|
|
|
780 end Initialize_TCB;
|
|
|
781
|
|
|
782 -----------------
|
|
|
783 -- Create_Task --
|
|
|
784 -----------------
|
|
|
785
|
|
|
786 procedure Create_Task
|
|
|
787 (T : Task_Id;
|
|
|
788 Wrapper : System.Address;
|
|
|
789 Stack_Size : System.Parameters.Size_Type;
|
|
|
790 Priority : System.Any_Priority;
|
|
|
791 Succeeded : out Boolean)
|
|
|
792 is
|
|
|
793 Attributes : aliased pthread_attr_t;
|
|
|
794 Result : Interfaces.C.int;
|
|
|
795
|
|
|
796 function Thread_Body_Access is new
|
|
|
797 Ada.Unchecked_Conversion (System.Address, Thread_Body);
|
|
|
798
|
|
|
799 begin
|
|
|
800 Result := pthread_attr_init (Attributes'Access);
|
|
|
801 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
802
|
|
|
803 if Result /= 0 then
|
|
|
804 Succeeded := False;
|
|
|
805 return;
|
|
|
806 end if;
|
|
|
807
|
|
|
808 Result := pthread_attr_setstacksize
|
|
|
809 (Attributes'Access, Interfaces.C.size_t (Stack_Size));
|
|
|
810 pragma Assert (Result = 0);
|
|
|
811
|
|
|
812 -- Since the initial signal mask of a thread is inherited from the
|
|
|
813 -- creator, and the Environment task has all its signals masked, we
|
|
|
814 -- do not need to manipulate caller's signal mask at this point.
|
|
|
815 -- All tasks in RTS will have All_Tasks_Mask initially.
|
|
|
816
|
|
|
817 Result := pthread_create
|
|
|
818 (T.Common.LL.Thread'Access,
|
|
|
819 Attributes'Access,
|
|
|
820 Thread_Body_Access (Wrapper),
|
|
|
821 To_Address (T));
|
|
|
822 pragma Assert (Result = 0 or else Result = EAGAIN);
|
|
|
823
|
|
|
824 Succeeded := Result = 0;
|
|
|
825
|
|
|
826 pthread_detach (T.Common.LL.Thread'Access);
|
|
|
827 -- Detach the thread using pthread_detach, since DCE threads do not have
|
|
|
828 -- pthread_attr_set_detachstate.
|
|
|
829
|
|
|
830 Result := pthread_attr_destroy (Attributes'Access);
|
|
|
831 pragma Assert (Result = 0);
|
|
|
832
|
|
|
833 Set_Priority (T, Priority);
|
|
|
834 end Create_Task;
|
|
|
835
|
|
|
836 ------------------
|
|
|
837 -- Finalize_TCB --
|
|
|
838 ------------------
|
|
|
839
|
|
|
840 procedure Finalize_TCB (T : Task_Id) is
|
|
|
841 Result : Interfaces.C.int;
|
|
|
842
|
|
|
843 begin
|
|
|
844 if not Single_Lock then
|
|
|
845 Result := pthread_mutex_destroy (T.Common.LL.L'Access);
|
|
|
846 pragma Assert (Result = 0);
|
|
|
847 end if;
|
|
|
848
|
|
|
849 Result := pthread_cond_destroy (T.Common.LL.CV'Access);
|
|
|
850 pragma Assert (Result = 0);
|
|
|
851
|
|
|
852 if T.Known_Tasks_Index /= -1 then
|
|
|
853 Known_Tasks (T.Known_Tasks_Index) := null;
|
|
|
854 end if;
|
|
|
855
|
|
|
856 ATCB_Allocation.Free_ATCB (T);
|
|
|
857 end Finalize_TCB;
|
|
|
858
|
|
|
859 ---------------
|
|
|
860 -- Exit_Task --
|
|
|
861 ---------------
|
|
|
862
|
|
|
863 procedure Exit_Task is
|
|
|
864 begin
|
|
|
865 Specific.Set (null);
|
|
|
866 end Exit_Task;
|
|
|
867
|
|
|
868 ----------------
|
|
|
869 -- Abort_Task --
|
|
|
870 ----------------
|
|
|
871
|
|
|
872 procedure Abort_Task (T : Task_Id) is
|
|
|
873 begin
|
|
|
874 -- Interrupt Server_Tasks may be waiting on an "event" flag (signal)
|
|
|
875
|
|
|
876 if T.Common.State = Interrupt_Server_Blocked_On_Event_Flag then
|
|
|
877 System.Interrupt_Management.Operations.Interrupt_Self_Process
|
|
|
878 (PIO.Get_Interrupt_ID (T));
|
|
|
879 end if;
|
|
|
880 end Abort_Task;
|
|
|
881
|
|
|
882 ----------------
|
|
|
883 -- Initialize --
|
|
|
884 ----------------
|
|
|
885
|
|
|
886 procedure Initialize (S : in out Suspension_Object) is
|
|
|
887 Mutex_Attr : aliased pthread_mutexattr_t;
|
|
|
888 Cond_Attr : aliased pthread_condattr_t;
|
|
|
889 Result : Interfaces.C.int;
|
|
|
890 begin
|
|
|
891 -- Initialize internal state (always to False (ARM D.10(6)))
|
|
|
892
|
|
|
893 S.State := False;
|
|
|
894 S.Waiting := False;
|
|
|
895
|
|
|
896 -- Initialize internal mutex
|
|
|
897
|
|
|
898 Result := pthread_mutex_init (S.L'Access, Mutex_Attr'Access);
|
|
|
899 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
900
|
|
|
901 if Result = ENOMEM then
|
|
|
902 raise Storage_Error;
|
|
|
903 end if;
|
|
|
904
|
|
|
905 -- Initialize internal condition variable
|
|
|
906
|
|
|
907 Result := pthread_cond_init (S.CV'Access, Cond_Attr'Access);
|
|
|
908 pragma Assert (Result = 0 or else Result = ENOMEM);
|
|
|
909
|
|
|
910 if Result /= 0 then
|
|
|
911 Result := pthread_mutex_destroy (S.L'Access);
|
|
|
912 pragma Assert (Result = 0);
|
|
|
913
|
|
|
914 if Result = ENOMEM then
|
|
|
915 raise Storage_Error;
|
|
|
916 end if;
|
|
|
917 end if;
|
|
|
918 end Initialize;
|
|
|
919
|
|
|
920 --------------
|
|
|
921 -- Finalize --
|
|
|
922 --------------
|
|
|
923
|
|
|
924 procedure Finalize (S : in out Suspension_Object) is
|
|
|
925 Result : Interfaces.C.int;
|
|
|
926
|
|
|
927 begin
|
|
|
928 -- Destroy internal mutex
|
|
|
929
|
|
|
930 Result := pthread_mutex_destroy (S.L'Access);
|
|
|
931 pragma Assert (Result = 0);
|
|
|
932
|
|
|
933 -- Destroy internal condition variable
|
|
|
934
|
|
|
935 Result := pthread_cond_destroy (S.CV'Access);
|
|
|
936 pragma Assert (Result = 0);
|
|
|
937 end Finalize;
|
|
|
938
|
|
|
939 -------------------
|
|
|
940 -- Current_State --
|
|
|
941 -------------------
|
|
|
942
|
|
|
943 function Current_State (S : Suspension_Object) return Boolean is
|
|
|
944 begin
|
|
|
945 -- We do not want to use lock on this read operation. State is marked
|
|
|
946 -- as Atomic so that we ensure that the value retrieved is correct.
|
|
|
947
|
|
|
948 return S.State;
|
|
|
949 end Current_State;
|
|
|
950
|
|
|
951 ---------------
|
|
|
952 -- Set_False --
|
|
|
953 ---------------
|
|
|
954
|
|
|
955 procedure Set_False (S : in out Suspension_Object) is
|
|
|
956 Result : Interfaces.C.int;
|
|
|
957
|
|
|
958 begin
|
|
|
959 SSL.Abort_Defer.all;
|
|
|
960
|
|
|
961 Result := pthread_mutex_lock (S.L'Access);
|
|
|
962 pragma Assert (Result = 0);
|
|
|
963
|
|
|
964 S.State := False;
|
|
|
965
|
|
|
966 Result := pthread_mutex_unlock (S.L'Access);
|
|
|
967 pragma Assert (Result = 0);
|
|
|
968
|
|
|
969 SSL.Abort_Undefer.all;
|
|
|
970 end Set_False;
|
|
|
971
|
|
|
972 --------------
|
|
|
973 -- Set_True --
|
|
|
974 --------------
|
|
|
975
|
|
|
976 procedure Set_True (S : in out Suspension_Object) is
|
|
|
977 Result : Interfaces.C.int;
|
|
|
978
|
|
|
979 begin
|
|
|
980 SSL.Abort_Defer.all;
|
|
|
981
|
|
|
982 Result := pthread_mutex_lock (S.L'Access);
|
|
|
983 pragma Assert (Result = 0);
|
|
|
984
|
|
|
985 -- If there is already a task waiting on this suspension object then
|
|
|
986 -- we resume it, leaving the state of the suspension object to False,
|
|
|
987 -- as it is specified in ARM D.10 par. 9. Otherwise, it just leaves
|
|
|
988 -- the state to True.
|
|
|
989
|
|
|
990 if S.Waiting then
|
|
|
991 S.Waiting := False;
|
|
|
992 S.State := False;
|
|
|
993
|
|
|
994 Result := pthread_cond_signal (S.CV'Access);
|
|
|
995 pragma Assert (Result = 0);
|
|
|
996
|
|
|
997 else
|
|
|
998 S.State := True;
|
|
|
999 end if;
|
|
|
1000
|
|
|
1001 Result := pthread_mutex_unlock (S.L'Access);
|
|
|
1002 pragma Assert (Result = 0);
|
|
|
1003
|
|
|
1004 SSL.Abort_Undefer.all;
|
|
|
1005 end Set_True;
|
|
|
1006
|
|
|
1007 ------------------------
|
|
|
1008 -- Suspend_Until_True --
|
|
|
1009 ------------------------
|
|
|
1010
|
|
|
1011 procedure Suspend_Until_True (S : in out Suspension_Object) is
|
|
|
1012 Result : Interfaces.C.int;
|
|
|
1013
|
|
|
1014 begin
|
|
|
1015 SSL.Abort_Defer.all;
|
|
|
1016
|
|
|
1017 Result := pthread_mutex_lock (S.L'Access);
|
|
|
1018 pragma Assert (Result = 0);
|
|
|
1019
|
|
|
1020 if S.Waiting then
|
|
|
1021 -- Program_Error must be raised upon calling Suspend_Until_True
|
|
|
1022 -- if another task is already waiting on that suspension object
|
|
|
1023 -- (ARM D.10 par. 10).
|
|
|
1024
|
|
|
1025 Result := pthread_mutex_unlock (S.L'Access);
|
|
|
1026 pragma Assert (Result = 0);
|
|
|
1027
|
|
|
1028 SSL.Abort_Undefer.all;
|
|
|
1029
|
|
|
1030 raise Program_Error;
|
|
|
1031 else
|
|
|
1032 -- Suspend the task if the state is False. Otherwise, the task
|
|
|
1033 -- continues its execution, and the state of the suspension object
|
|
|
1034 -- is set to False (ARM D.10 par. 9).
|
|
|
1035
|
|
|
1036 if S.State then
|
|
|
1037 S.State := False;
|
|
|
1038 else
|
|
|
1039 S.Waiting := True;
|
|
|
1040
|
|
|
1041 loop
|
|
|
1042 -- Loop in case pthread_cond_wait returns earlier than expected
|
|
|
1043 -- (e.g. in case of EINTR caused by a signal).
|
|
|
1044
|
|
|
1045 Result := pthread_cond_wait (S.CV'Access, S.L'Access);
|
|
|
1046 pragma Assert (Result = 0 or else Result = EINTR);
|
|
|
1047
|
|
|
1048 exit when not S.Waiting;
|
|
|
1049 end loop;
|
|
|
1050 end if;
|
|
|
1051
|
|
|
1052 Result := pthread_mutex_unlock (S.L'Access);
|
|
|
1053 pragma Assert (Result = 0);
|
|
|
1054
|
|
|
1055 SSL.Abort_Undefer.all;
|
|
|
1056 end if;
|
|
|
1057 end Suspend_Until_True;
|
|
|
1058
|
|
|
1059 ----------------
|
|
|
1060 -- Check_Exit --
|
|
|
1061 ----------------
|
|
|
1062
|
|
|
1063 -- Dummy version
|
|
|
1064
|
|
|
1065 function Check_Exit (Self_ID : ST.Task_Id) return Boolean is
|
|
|
1066 pragma Unreferenced (Self_ID);
|
|
|
1067 begin
|
|
|
1068 return True;
|
|
|
1069 end Check_Exit;
|
|
|
1070
|
|
|
1071 --------------------
|
|
|
1072 -- Check_No_Locks --
|
|
|
1073 --------------------
|
|
|
1074
|
|
|
1075 function Check_No_Locks (Self_ID : ST.Task_Id) return Boolean is
|
|
|
1076 pragma Unreferenced (Self_ID);
|
|
|
1077 begin
|
|
|
1078 return True;
|
|
|
1079 end Check_No_Locks;
|
|
|
1080
|
|
|
1081 ----------------------
|
|
|
1082 -- Environment_Task --
|
|
|
1083 ----------------------
|
|
|
1084
|
|
|
1085 function Environment_Task return Task_Id is
|
|
|
1086 begin
|
|
|
1087 return Environment_Task_Id;
|
|
|
1088 end Environment_Task;
|
|
|
1089
|
|
|
1090 --------------
|
|
|
1091 -- Lock_RTS --
|
|
|
1092 --------------
|
|
|
1093
|
|
|
1094 procedure Lock_RTS is
|
|
|
1095 begin
|
|
|
1096 Write_Lock (Single_RTS_Lock'Access, Global_Lock => True);
|
|
|
1097 end Lock_RTS;
|
|
|
1098
|
|
|
1099 ----------------
|
|
|
1100 -- Unlock_RTS --
|
|
|
1101 ----------------
|
|
|
1102
|
|
|
1103 procedure Unlock_RTS is
|
|
|
1104 begin
|
|
|
1105 Unlock (Single_RTS_Lock'Access, Global_Lock => True);
|
|
|
1106 end Unlock_RTS;
|
|
|
1107
|
|
|
1108 ------------------
|
|
|
1109 -- Suspend_Task --
|
|
|
1110 ------------------
|
|
|
1111
|
|
|
1112 function Suspend_Task
|
|
|
1113 (T : ST.Task_Id;
|
|
|
1114 Thread_Self : Thread_Id) return Boolean
|
|
|
1115 is
|
|
|
1116 pragma Unreferenced (T);
|
|
|
1117 pragma Unreferenced (Thread_Self);
|
|
|
1118 begin
|
|
|
1119 return False;
|
|
|
1120 end Suspend_Task;
|
|
|
1121
|
|
|
1122 -----------------
|
|
|
1123 -- Resume_Task --
|
|
|
1124 -----------------
|
|
|
1125
|
|
|
1126 function Resume_Task
|
|
|
1127 (T : ST.Task_Id;
|
|
|
1128 Thread_Self : Thread_Id) return Boolean
|
|
|
1129 is
|
|
|
1130 pragma Unreferenced (T);
|
|
|
1131 pragma Unreferenced (Thread_Self);
|
|
|
1132 begin
|
|
|
1133 return False;
|
|
|
1134 end Resume_Task;
|
|
|
1135
|
|
|
1136 --------------------
|
|
|
1137 -- Stop_All_Tasks --
|
|
|
1138 --------------------
|
|
|
1139
|
|
|
1140 procedure Stop_All_Tasks is
|
|
|
1141 begin
|
|
|
1142 null;
|
|
|
1143 end Stop_All_Tasks;
|
|
|
1144
|
|
|
1145 ---------------
|
|
|
1146 -- Stop_Task --
|
|
|
1147 ---------------
|
|
|
1148
|
|
|
1149 function Stop_Task (T : ST.Task_Id) return Boolean is
|
|
|
1150 pragma Unreferenced (T);
|
|
|
1151 begin
|
|
|
1152 return False;
|
|
|
1153 end Stop_Task;
|
|
|
1154
|
|
|
1155 -------------------
|
|
|
1156 -- Continue_Task --
|
|
|
1157 -------------------
|
|
|
1158
|
|
|
1159 function Continue_Task (T : ST.Task_Id) return Boolean is
|
|
|
1160 pragma Unreferenced (T);
|
|
|
1161 begin
|
|
|
1162 return False;
|
|
|
1163 end Continue_Task;
|
|
|
1164
|
|
|
1165 ----------------
|
|
|
1166 -- Initialize --
|
|
|
1167 ----------------
|
|
|
1168
|
|
|
1169 procedure Initialize (Environment_Task : Task_Id) is
|
|
|
1170 act : aliased struct_sigaction;
|
|
|
1171 old_act : aliased struct_sigaction;
|
|
|
1172 Tmp_Set : aliased sigset_t;
|
|
|
1173 Result : Interfaces.C.int;
|
|
|
1174
|
|
|
1175 function State
|
|
|
1176 (Int : System.Interrupt_Management.Interrupt_ID) return Character;
|
|
|
1177 pragma Import (C, State, "__gnat_get_interrupt_state");
|
|
|
1178 -- Get interrupt state. Defined in a-init.c. The input argument is
|
|
|
1179 -- the interrupt number, and the result is one of the following:
|
|
|
1180
|
|
|
1181 Default : constant Character := 's';
|
|
|
1182 -- 'n' this interrupt not set by any Interrupt_State pragma
|
|
|
1183 -- 'u' Interrupt_State pragma set state to User
|
|
|
1184 -- 'r' Interrupt_State pragma set state to Runtime
|
|
|
1185 -- 's' Interrupt_State pragma set state to System (use "default"
|
|
|
1186 -- system handler)
|
|
|
1187
|
|
|
1188 begin
|
|
|
1189 Environment_Task_Id := Environment_Task;
|
|
|
1190
|
|
|
1191 Interrupt_Management.Initialize;
|
|
|
1192
|
|
|
1193 -- Initialize the lock used to synchronize chain of all ATCBs
|
|
|
1194
|
|
|
1195 Initialize_Lock (Single_RTS_Lock'Access, RTS_Lock_Level);
|
|
|
1196
|
|
|
1197 Specific.Initialize (Environment_Task);
|
|
|
1198
|
|
|
1199 -- Make environment task known here because it doesn't go through
|
|
|
1200 -- Activate_Tasks, which does it for all other tasks.
|
|
|
1201
|
|
|
1202 Known_Tasks (Known_Tasks'First) := Environment_Task;
|
|
|
1203 Environment_Task.Known_Tasks_Index := Known_Tasks'First;
|
|
|
1204
|
|
|
1205 Enter_Task (Environment_Task);
|
|
|
1206
|
|
|
1207 -- Install the abort-signal handler
|
|
|
1208
|
|
|
1209 if State (System.Interrupt_Management.Abort_Task_Interrupt)
|
|
|
1210 /= Default
|
|
|
1211 then
|
|
|
1212 act.sa_flags := 0;
|
|
|
1213 act.sa_handler := Abort_Handler'Address;
|
|
|
1214
|
|
|
1215 Result := sigemptyset (Tmp_Set'Access);
|
|
|
1216 pragma Assert (Result = 0);
|
|
|
1217 act.sa_mask := Tmp_Set;
|
|
|
1218
|
|
|
1219 Result :=
|
|
|
1220 sigaction (
|
|
|
1221 Signal (System.Interrupt_Management.Abort_Task_Interrupt),
|
|
|
1222 act'Unchecked_Access,
|
|
|
1223 old_act'Unchecked_Access);
|
|
|
1224 pragma Assert (Result = 0);
|
|
|
1225 end if;
|
|
|
1226 end Initialize;
|
|
|
1227
|
|
|
1228 -- NOTE: Unlike other pthread implementations, we do *not* mask all
|
|
|
1229 -- signals here since we handle signals using the process-wide primitive
|
|
|
1230 -- signal, rather than using sigthreadmask and sigwait. The reason of
|
|
|
1231 -- this difference is that sigwait doesn't work when some critical
|
|
|
1232 -- signals (SIGABRT, SIGPIPE) are masked.
|
|
|
1233
|
|
|
1234 -----------------------
|
|
|
1235 -- Set_Task_Affinity --
|
|
|
1236 -----------------------
|
|
|
1237
|
|
|
1238 procedure Set_Task_Affinity (T : ST.Task_Id) is
|
|
|
1239 pragma Unreferenced (T);
|
|
|
1240
|
|
|
1241 begin
|
|
|
1242 -- Setting task affinity is not supported by the underlying system
|
|
|
1243
|
|
|
1244 null;
|
|
|
1245 end Set_Task_Affinity;
|
|
|
1246
|
|
|
1247 end System.Task_Primitives.Operations;
|
