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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 . O S _ I N T E R F A C E --
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6 -- --
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7 -- B o d y --
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8 -- --
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131
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9 -- Copyright (C) 2015-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT 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 the GNU/Hurd version of this package.
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33
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34 pragma Polling (Off);
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35 -- Turn off polling, we do not want ATC polling to take place during
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36 -- tasking operations. It causes infinite loops and other problems.
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37
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38 -- This package encapsulates all direct interfaces to OS services
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39 -- that are needed by children of System.
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40
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41 package body System.OS_Interface is
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42
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43 --------------------
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44 -- Get_Stack_Base --
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45 --------------------
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46
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47 function Get_Stack_Base (thread : pthread_t) return Address is
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48 pragma Warnings (Off, thread);
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49
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50 begin
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51 return Null_Address;
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52 end Get_Stack_Base;
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53
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54 ------------------
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55 -- pthread_init --
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56 ------------------
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57
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58 procedure pthread_init is
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59 begin
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60 null;
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61 end pthread_init;
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62
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63 --------------------------------------
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64 -- pthread_mutexattr_setprioceiling --
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65 --------------------------------------
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66
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67 function pthread_mutexattr_setprioceiling
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68 (attr : access pthread_mutexattr_t;
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69 prioceiling : int) return int is
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70 pragma Unreferenced (attr, prioceiling);
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71 begin
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72 return 0;
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73 end pthread_mutexattr_setprioceiling;
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74
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75 --------------------------------------
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76 -- pthread_mutexattr_getprioceiling --
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77 --------------------------------------
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78
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79 function pthread_mutexattr_getprioceiling
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80 (attr : access pthread_mutexattr_t;
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81 prioceiling : access int) return int is
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82 pragma Unreferenced (attr, prioceiling);
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83 begin
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84 return 0;
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85 end pthread_mutexattr_getprioceiling;
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86
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87 ---------------------------
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88 -- pthread_setschedparam --
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89 ---------------------------
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90
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91 function pthread_setschedparam
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92 (thread : pthread_t;
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93 policy : int;
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94 param : access struct_sched_param) return int is
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95 pragma Unreferenced (thread, policy, param);
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96 begin
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97 return 0;
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98 end pthread_setschedparam;
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99
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100 -----------------
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101 -- To_Duration --
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102 -----------------
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103
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104 function To_Duration (TS : timespec) return Duration is
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105 begin
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106 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
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107 end To_Duration;
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108
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109 ------------------------
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110 -- To_Target_Priority --
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111 ------------------------
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112
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113 function To_Target_Priority
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114 (Prio : System.Any_Priority) return Interfaces.C.int
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115 is
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116 begin
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117 return Interfaces.C.int (Prio);
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118 end To_Target_Priority;
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119
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120 -----------------
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121 -- To_Timespec --
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122 -----------------
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123
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124 function To_Timespec (D : Duration) return timespec is
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125 S : time_t;
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126 F : Duration;
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127
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128 begin
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129 S := time_t (Long_Long_Integer (D));
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130 F := D - Duration (S);
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131
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132 -- If F has negative value due to a round-up, adjust for positive F
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133 -- value.
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134
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135 if F < 0.0 then
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136 S := S - 1;
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137 F := F + 1.0;
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138 end if;
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139
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140 return timespec'(tv_sec => S,
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141 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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142 end To_Timespec;
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143
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144 end System.OS_Interface;
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