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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- A D A . E X E C U T I O N _ T I M E --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 2009-2017, Free Software Foundation, Inc. --
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10 -- --
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11 -- This specification is derived from the Ada Reference Manual for use with --
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12 -- GNAT. The copyright notice above, and the license provisions that follow --
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13 -- apply solely to the contents of the part following the private keyword. --
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14 -- --
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15 -- GNAT is free software; you can redistribute it and/or modify it under --
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16 -- terms of the GNU General Public License as published by the Free Soft- --
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17 -- ware Foundation; either version 3, or (at your option) any later ver- --
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18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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21 -- --
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22 -- As a special exception under Section 7 of GPL version 3, you are granted --
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23 -- additional permissions described in the GCC Runtime Library Exception, --
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24 -- version 3.1, as published by the Free Software Foundation. --
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25 -- --
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26 -- You should have received a copy of the GNU General Public License and --
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27 -- a copy of the GCC Runtime Library Exception along with this program; --
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28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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29 -- <http://www.gnu.org/licenses/>. --
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30 -- --
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31 -- GNAT was originally developed by the GNAT team at New York University. --
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32 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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33 -- --
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34 ------------------------------------------------------------------------------
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35
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36 -- This is the Windows native version of this package
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37
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38 with Ada.Task_Identification;
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39 with Ada.Real_Time;
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40
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41 package Ada.Execution_Time with
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42 SPARK_Mode
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43 is
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44 type CPU_Time is private;
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45
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46 CPU_Time_First : constant CPU_Time;
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47 CPU_Time_Last : constant CPU_Time;
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48 CPU_Time_Unit : constant := 0.000001;
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49 CPU_Tick : constant Ada.Real_Time.Time_Span;
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50
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51 use type Ada.Task_Identification.Task_Id;
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52
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53 function Clock
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54 (T : Ada.Task_Identification.Task_Id :=
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55 Ada.Task_Identification.Current_Task)
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56 return CPU_Time
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57 with
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58 Volatile_Function,
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59 Global => Ada.Real_Time.Clock_Time,
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60 Pre => T /= Ada.Task_Identification.Null_Task_Id;
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61
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62 function "+"
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63 (Left : CPU_Time;
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64 Right : Ada.Real_Time.Time_Span) return CPU_Time
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65 with
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66 Global => null;
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67
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68 function "+"
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69 (Left : Ada.Real_Time.Time_Span;
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70 Right : CPU_Time) return CPU_Time
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71 with
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72 Global => null;
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73
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74 function "-"
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75 (Left : CPU_Time;
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76 Right : Ada.Real_Time.Time_Span) return CPU_Time
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77 with
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78 Global => null;
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79
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80 function "-"
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81 (Left : CPU_Time;
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82 Right : CPU_Time) return Ada.Real_Time.Time_Span
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83 with
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84 Global => null;
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85
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86 function "<" (Left, Right : CPU_Time) return Boolean with
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87 Global => null;
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88 function "<=" (Left, Right : CPU_Time) return Boolean with
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89 Global => null;
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90 function ">" (Left, Right : CPU_Time) return Boolean with
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91 Global => null;
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92 function ">=" (Left, Right : CPU_Time) return Boolean with
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93 Global => null;
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94
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95 procedure Split
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96 (T : CPU_Time;
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97 SC : out Ada.Real_Time.Seconds_Count;
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98 TS : out Ada.Real_Time.Time_Span)
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99 with
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100 Global => null;
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101
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102 function Time_Of
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103 (SC : Ada.Real_Time.Seconds_Count;
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104 TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
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105 return CPU_Time
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106 with
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107 Global => null;
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108
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109 Interrupt_Clocks_Supported : constant Boolean := False;
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110 Separate_Interrupt_Clocks_Supported : constant Boolean := False;
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111
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112 pragma Warnings (Off, "check will fail at run time");
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113 function Clock_For_Interrupts return CPU_Time with
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114 Volatile_Function,
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115 Global => Ada.Real_Time.Clock_Time,
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116 Pre => Interrupt_Clocks_Supported;
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117 pragma Warnings (On, "check will fail at run time");
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118
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119 private
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120 pragma SPARK_Mode (Off);
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121
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122 type CPU_Time is new Ada.Real_Time.Time;
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123
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124 CPU_Time_First : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_First);
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125 CPU_Time_Last : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_Last);
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126
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127 CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
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128
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129 pragma Import (Intrinsic, "<");
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130 pragma Import (Intrinsic, "<=");
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131 pragma Import (Intrinsic, ">");
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132 pragma Import (Intrinsic, ">=");
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133
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134 end Ada.Execution_Time;
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