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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 -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 1992-2017, Free Software Foundation, Inc. --
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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 POSIX-like version of this package
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33
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34 separate (System.Task_Primitives.Operations)
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35 package body Specific is
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36
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37 ATCB_Key : aliased pthread_key_t;
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38 -- Key used to find the Ada Task_Id associated with a thread
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39
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40 ----------------
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41 -- Initialize --
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42 ----------------
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43
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44 procedure Initialize (Environment_Task : Task_Id) is
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45 pragma Warnings (Off, Environment_Task);
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46 Result : Interfaces.C.int;
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47 begin
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48 Result := pthread_key_create (ATCB_Key'Access, null);
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49 pragma Assert (Result = 0);
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50 end Initialize;
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51
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52 -------------------
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53 -- Is_Valid_Task --
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54 -------------------
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55
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56 function Is_Valid_Task return Boolean is
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57 begin
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58 return pthread_getspecific (ATCB_Key) /= System.Null_Address;
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59 end Is_Valid_Task;
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60
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61 ---------
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62 -- Set --
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63 ---------
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64
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65 procedure Set (Self_Id : Task_Id) is
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66 Result : Interfaces.C.int;
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67 begin
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68 Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id));
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69 pragma Assert (Result = 0);
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70 end Set;
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71
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72 ----------
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73 -- Self --
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74 ----------
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75
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76 function Self return Task_Id is
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77 begin
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78 return To_Task_Id (pthread_getspecific (ATCB_Key));
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79 end Self;
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80
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81 end Specific;
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