1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
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 --
9 -- Copyright (C) 1992-2004, Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a GNU/Linux (GNU/LinuxThreads) version of this package
36 -- This package contains all the GNULL primitives that interface directly
37 -- with the underlying OS.
40 -- Turn off polling, we do not want ATC polling to take place during
41 -- tasking operations. It causes infinite loops and other problems.
43 with System.Tasking.Debug;
44 -- used for Known_Tasks
50 with System.Interrupt_Management;
51 -- used for Keep_Unmasked
52 -- Abort_Task_Interrupt
55 with System.Interrupt_Management.Operations;
56 -- used for Set_Interrupt_Mask
58 pragma Elaborate_All (System.Interrupt_Management.Operations);
60 with System.Parameters;
64 -- used for Ada_Task_Control_Block
68 -- used for Raise_Exception
69 -- Raise_From_Signal_Handler
72 with System.Soft_Links;
73 -- used for Defer/Undefer_Abort
75 -- Note that we do not use System.Tasking.Initialization directly since
76 -- this is a higher level package that we shouldn't depend on. For example
77 -- when using the restricted run time, it is replaced by
78 -- System.Tasking.Restricted.Initialization
80 with System.OS_Primitives;
81 -- used for Delay_Modes
83 with System.Soft_Links;
84 -- used for Get_Machine_State_Addr
86 with Unchecked_Conversion;
87 with Unchecked_Deallocation;
89 package body System.Task_Primitives.Operations is
91 use System.Tasking.Debug;
94 use System.OS_Interface;
95 use System.Parameters;
96 use System.OS_Primitives;
98 package SSL renames System.Soft_Links;
104 -- The followings are logically constants, but need to be initialized
107 Single_RTS_Lock : aliased RTS_Lock;
108 -- This is a lock to allow only one thread of control in the RTS at
109 -- a time; it is used to execute in mutual exclusion from all other tasks.
110 -- Used mainly in Single_Lock mode, but also to protect All_Tasks_List
112 ATCB_Key : aliased pthread_key_t;
113 -- Key used to find the Ada Task_Id associated with a thread
115 Environment_Task_Id : Task_Id;
116 -- A variable to hold Task_Id for the environment task.
118 Unblocked_Signal_Mask : aliased sigset_t;
119 -- The set of signals that should unblocked in all tasks
121 -- The followings are internal configuration constants needed.
122 Priority_Ceiling_Emulation : constant Boolean := True;
124 Next_Serial_Number : Task_Serial_Number := 100;
125 -- We start at 100, to reserve some special values for
126 -- using in error checking.
127 -- The following are internal configuration constants needed.
129 Time_Slice_Val : Integer;
130 pragma Import (C, Time_Slice_Val, "__gl_time_slice_val");
132 Dispatching_Policy : Character;
133 pragma Import (C, Dispatching_Policy, "__gl_task_dispatching_policy");
135 FIFO_Within_Priorities : constant Boolean := Dispatching_Policy = 'F';
136 -- Indicates whether FIFO_Within_Priorities is set.
138 -- The following are effectively constants, but they need to
139 -- be initialized by calling a pthread_ function.
141 Mutex_Attr : aliased pthread_mutexattr_t;
142 Cond_Attr : aliased pthread_condattr_t;
144 Foreign_Task_Elaborated : aliased Boolean := True;
145 -- Used to identified fake tasks (i.e., non-Ada Threads).
153 procedure Initialize (Environment_Task : Task_Id);
154 pragma Inline (Initialize);
155 -- Initialize various data needed by this package.
157 function Is_Valid_Task return Boolean;
158 pragma Inline (Is_Valid_Task);
159 -- Does executing thread have a TCB?
161 procedure Set (Self_Id : Task_Id);
163 -- Set the self id for the current task.
165 function Self return Task_Id;
166 pragma Inline (Self);
167 -- Return a pointer to the Ada Task Control Block of the calling task.
171 package body Specific is separate;
172 -- The body of this package is target specific.
174 ---------------------------------
175 -- Support for foreign threads --
176 ---------------------------------
178 function Register_Foreign_Thread (Thread : Thread_Id) return Task_Id;
179 -- Allocate and Initialize a new ATCB for the current Thread.
181 function Register_Foreign_Thread
182 (Thread : Thread_Id) return Task_Id is separate;
184 -----------------------
185 -- Local Subprograms --
186 -----------------------
188 subtype unsigned_long is Interfaces.C.unsigned_long;
190 procedure Abort_Handler (signo : Signal);
192 function To_pthread_t is new Unchecked_Conversion
193 (unsigned_long, System.OS_Interface.pthread_t);
199 procedure Abort_Handler (signo : Signal) is
200 pragma Unreferenced (signo);
202 Self_Id : constant Task_Id := Self;
203 Result : Interfaces.C.int;
204 Old_Set : aliased sigset_t;
207 if ZCX_By_Default and then GCC_ZCX_Support then
211 if Self_Id.Deferral_Level = 0
212 and then Self_Id.Pending_ATC_Level < Self_Id.ATC_Nesting_Level
213 and then not Self_Id.Aborting
215 Self_Id.Aborting := True;
217 -- Make sure signals used for RTS internal purpose are unmasked
219 Result := pthread_sigmask (SIG_UNBLOCK,
220 Unblocked_Signal_Mask'Unchecked_Access, Old_Set'Unchecked_Access);
221 pragma Assert (Result = 0);
223 raise Standard'Abort_Signal;
231 procedure Lock_RTS is
233 Write_Lock (Single_RTS_Lock'Access, Global_Lock => True);
240 procedure Unlock_RTS is
242 Unlock (Single_RTS_Lock'Access, Global_Lock => True);
249 -- The underlying thread system extends the memory (up to 2MB) when needed
251 procedure Stack_Guard (T : ST.Task_Id; On : Boolean) is
252 pragma Unreferenced (T);
253 pragma Unreferenced (On);
263 function Get_Thread_Id (T : ST.Task_Id) return OSI.Thread_Id is
265 return T.Common.LL.Thread;
272 function Self return Task_Id renames Specific.Self;
274 ---------------------
275 -- Initialize_Lock --
276 ---------------------
278 -- Note: mutexes and cond_variables needed per-task basis are
279 -- initialized in Initialize_TCB and the Storage_Error is
280 -- handled. Other mutexes (such as RTS_Lock, Memory_Lock...)
281 -- used in RTS is initialized before any status change of RTS.
282 -- Therefore rasing Storage_Error in the following routines
283 -- should be able to be handled safely.
285 procedure Initialize_Lock
286 (Prio : System.Any_Priority;
289 Result : Interfaces.C.int;
292 if Priority_Ceiling_Emulation then
296 Result := pthread_mutex_init (L.L'Access, Mutex_Attr'Access);
298 pragma Assert (Result = 0 or else Result = ENOMEM);
300 if Result = ENOMEM then
301 Ada.Exceptions.Raise_Exception (Storage_Error'Identity,
302 "Failed to allocate a lock");
306 procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is
307 pragma Unreferenced (Level);
309 Result : Interfaces.C.int;
312 Result := pthread_mutex_init (L, Mutex_Attr'Access);
314 pragma Assert (Result = 0 or else Result = ENOMEM);
316 if Result = ENOMEM then
325 procedure Finalize_Lock (L : access Lock) is
326 Result : Interfaces.C.int;
329 Result := pthread_mutex_destroy (L.L'Access);
330 pragma Assert (Result = 0);
333 procedure Finalize_Lock (L : access RTS_Lock) is
334 Result : Interfaces.C.int;
337 Result := pthread_mutex_destroy (L);
338 pragma Assert (Result = 0);
345 procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
346 Result : Interfaces.C.int;
349 if Priority_Ceiling_Emulation then
351 Self_ID : constant Task_Id := Self;
354 if Self_ID.Common.LL.Active_Priority > L.Ceiling then
355 Ceiling_Violation := True;
359 L.Saved_Priority := Self_ID.Common.LL.Active_Priority;
361 if Self_ID.Common.LL.Active_Priority < L.Ceiling then
362 Self_ID.Common.LL.Active_Priority := L.Ceiling;
365 Result := pthread_mutex_lock (L.L'Access);
366 pragma Assert (Result = 0);
367 Ceiling_Violation := False;
371 Result := pthread_mutex_lock (L.L'Access);
372 Ceiling_Violation := Result = EINVAL;
374 -- Assume the cause of EINVAL is a priority ceiling violation
376 pragma Assert (Result = 0 or else Result = EINVAL);
381 (L : access RTS_Lock;
382 Global_Lock : Boolean := False)
384 Result : Interfaces.C.int;
387 if not Single_Lock or else Global_Lock then
388 Result := pthread_mutex_lock (L);
389 pragma Assert (Result = 0);
393 procedure Write_Lock (T : Task_Id) is
394 Result : Interfaces.C.int;
397 if not Single_Lock then
398 Result := pthread_mutex_lock (T.Common.LL.L'Access);
399 pragma Assert (Result = 0);
407 procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
409 Write_Lock (L, Ceiling_Violation);
416 procedure Unlock (L : access Lock) is
417 Result : Interfaces.C.int;
420 if Priority_Ceiling_Emulation then
422 Self_ID : constant Task_Id := Self;
425 Result := pthread_mutex_unlock (L.L'Access);
426 pragma Assert (Result = 0);
428 if Self_ID.Common.LL.Active_Priority > L.Saved_Priority then
429 Self_ID.Common.LL.Active_Priority := L.Saved_Priority;
434 Result := pthread_mutex_unlock (L.L'Access);
435 pragma Assert (Result = 0);
439 procedure Unlock (L : access RTS_Lock; Global_Lock : Boolean := False) is
440 Result : Interfaces.C.int;
443 if not Single_Lock or else Global_Lock then
444 Result := pthread_mutex_unlock (L);
445 pragma Assert (Result = 0);
449 procedure Unlock (T : Task_Id) is
450 Result : Interfaces.C.int;
453 if not Single_Lock then
454 Result := pthread_mutex_unlock (T.Common.LL.L'Access);
455 pragma Assert (Result = 0);
465 Reason : System.Tasking.Task_States)
467 pragma Unreferenced (Reason);
469 Result : Interfaces.C.int;
472 pragma Assert (Self_ID = Self);
475 Result := pthread_cond_wait
476 (Self_ID.Common.LL.CV'Access, Single_RTS_Lock'Access);
478 Result := pthread_cond_wait
479 (Self_ID.Common.LL.CV'Access, Self_ID.Common.LL.L'Access);
482 -- EINTR is not considered a failure.
483 pragma Assert (Result = 0 or else Result = EINTR);
490 -- This is for use within the run-time system, so abort is
491 -- assumed to be already deferred, and the caller should be
492 -- holding its own ATCB lock.
494 procedure Timed_Sleep
497 Mode : ST.Delay_Modes;
498 Reason : System.Tasking.Task_States;
499 Timedout : out Boolean;
500 Yielded : out Boolean)
502 pragma Unreferenced (Reason);
504 Check_Time : constant Duration := Monotonic_Clock;
506 Request : aliased timespec;
507 Result : Interfaces.C.int;
513 if Mode = Relative then
514 Abs_Time := Duration'Min (Time, Max_Sensible_Delay) + Check_Time;
516 Abs_Time := Duration'Min (Check_Time + Max_Sensible_Delay, Time);
519 if Abs_Time > Check_Time then
520 Request := To_Timespec (Abs_Time);
523 exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level
524 or else Self_ID.Pending_Priority_Change;
527 Result := pthread_cond_timedwait
528 (Self_ID.Common.LL.CV'Access, Single_RTS_Lock'Access,
532 Result := pthread_cond_timedwait
533 (Self_ID.Common.LL.CV'Access, Self_ID.Common.LL.L'Access,
537 exit when Abs_Time <= Monotonic_Clock;
539 if Result = 0 or Result = EINTR then
540 -- somebody may have called Wakeup for us
545 pragma Assert (Result = ETIMEDOUT);
554 -- This is for use in implementing delay statements, so
555 -- we assume the caller is abort-deferred but is holding
558 procedure Timed_Delay
561 Mode : ST.Delay_Modes)
563 Check_Time : constant Duration := Monotonic_Clock;
565 Request : aliased timespec;
566 Result : Interfaces.C.int;
569 -- Only the little window between deferring abort and
570 -- locking Self_ID is the reason we need to
571 -- check for pending abort and priority change below! :(
579 Write_Lock (Self_ID);
581 if Mode = Relative then
582 Abs_Time := Time + Check_Time;
584 Abs_Time := Duration'Min (Check_Time + Max_Sensible_Delay, Time);
587 if Abs_Time > Check_Time then
588 Request := To_Timespec (Abs_Time);
589 Self_ID.Common.State := Delay_Sleep;
592 if Self_ID.Pending_Priority_Change then
593 Self_ID.Pending_Priority_Change := False;
594 Self_ID.Common.Base_Priority := Self_ID.New_Base_Priority;
595 Set_Priority (Self_ID, Self_ID.Common.Base_Priority);
598 exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level;
601 Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access,
602 Single_RTS_Lock'Access, Request'Access);
604 Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access,
605 Self_ID.Common.LL.L'Access, Request'Access);
608 exit when Abs_Time <= Monotonic_Clock;
610 pragma Assert (Result = 0 or else
611 Result = ETIMEDOUT or else
615 Self_ID.Common.State := Runnable;
624 Result := sched_yield;
625 SSL.Abort_Undefer.all;
628 ---------------------
629 -- Monotonic_Clock --
630 ---------------------
632 function Monotonic_Clock return Duration is
633 TV : aliased struct_timeval;
634 Result : Interfaces.C.int;
637 Result := gettimeofday (TV'Access, System.Null_Address);
638 pragma Assert (Result = 0);
639 return To_Duration (TV);
646 function RT_Resolution return Duration is
655 procedure Wakeup (T : Task_Id; Reason : System.Tasking.Task_States) is
656 pragma Unreferenced (Reason);
657 Result : Interfaces.C.int;
659 Result := pthread_cond_signal (T.Common.LL.CV'Access);
660 pragma Assert (Result = 0);
667 procedure Yield (Do_Yield : Boolean := True) is
668 Result : Interfaces.C.int;
669 pragma Unreferenced (Result);
672 Result := sched_yield;
680 procedure Set_Priority
682 Prio : System.Any_Priority;
683 Loss_Of_Inheritance : Boolean := False)
685 pragma Unreferenced (Loss_Of_Inheritance);
687 Result : Interfaces.C.int;
688 Param : aliased struct_sched_param;
691 T.Common.Current_Priority := Prio;
693 if Priority_Ceiling_Emulation then
694 if T.Common.LL.Active_Priority < Prio then
695 T.Common.LL.Active_Priority := Prio;
699 -- Priorities are in range 1 .. 99 on GNU/Linux, so we map
700 -- map 0 .. 31 to 1 .. 32
702 Param.sched_priority := Interfaces.C.int (Prio) + 1;
704 if Time_Slice_Val > 0 then
705 Result := pthread_setschedparam
706 (T.Common.LL.Thread, SCHED_RR, Param'Access);
708 elsif FIFO_Within_Priorities or else Time_Slice_Val = 0 then
709 Result := pthread_setschedparam
710 (T.Common.LL.Thread, SCHED_FIFO, Param'Access);
713 Param.sched_priority := 0;
714 Result := pthread_setschedparam
715 (T.Common.LL.Thread, SCHED_OTHER, Param'Access);
718 pragma Assert (Result = 0 or else Result = EPERM);
725 function Get_Priority (T : Task_Id) return System.Any_Priority is
727 return T.Common.Current_Priority;
734 procedure Enter_Task (Self_ID : Task_Id) is
736 Self_ID.Common.LL.Thread := pthread_self;
738 Specific.Set (Self_ID);
742 for J in Known_Tasks'Range loop
743 if Known_Tasks (J) = null then
744 Known_Tasks (J) := Self_ID;
745 Self_ID.Known_Tasks_Index := J;
757 function New_ATCB (Entry_Num : Task_Entry_Index) return Task_Id is
759 return new Ada_Task_Control_Block (Entry_Num);
766 function Is_Valid_Task return Boolean renames Specific.Is_Valid_Task;
768 -----------------------------
769 -- Register_Foreign_Thread --
770 -----------------------------
772 function Register_Foreign_Thread return Task_Id is
774 if Is_Valid_Task then
777 return Register_Foreign_Thread (pthread_self);
779 end Register_Foreign_Thread;
785 procedure Initialize_TCB (Self_ID : Task_Id; Succeeded : out Boolean) is
786 Result : Interfaces.C.int;
789 -- Give the task a unique serial number.
791 Self_ID.Serial_Number := Next_Serial_Number;
792 Next_Serial_Number := Next_Serial_Number + 1;
793 pragma Assert (Next_Serial_Number /= 0);
795 Self_ID.Common.LL.Thread := To_pthread_t (-1);
797 if not Single_Lock then
798 Result := pthread_mutex_init (Self_ID.Common.LL.L'Access,
800 pragma Assert (Result = 0 or else Result = ENOMEM);
808 Result := pthread_cond_init (Self_ID.Common.LL.CV'Access,
810 pragma Assert (Result = 0 or else Result = ENOMEM);
815 if not Single_Lock then
816 Result := pthread_mutex_destroy (Self_ID.Common.LL.L'Access);
817 pragma Assert (Result = 0);
828 procedure Create_Task
830 Wrapper : System.Address;
831 Stack_Size : System.Parameters.Size_Type;
832 Priority : System.Any_Priority;
833 Succeeded : out Boolean)
835 Adjusted_Stack_Size : Interfaces.C.size_t;
837 Attributes : aliased pthread_attr_t;
838 Result : Interfaces.C.int;
841 if Stack_Size = Unspecified_Size then
842 Adjusted_Stack_Size := Interfaces.C.size_t (Default_Stack_Size);
844 elsif Stack_Size < Minimum_Stack_Size then
845 Adjusted_Stack_Size := Interfaces.C.size_t (Minimum_Stack_Size);
848 Adjusted_Stack_Size := Interfaces.C.size_t (Stack_Size);
851 Result := pthread_attr_init (Attributes'Access);
852 pragma Assert (Result = 0 or else Result = ENOMEM);
860 pthread_attr_setstacksize
861 (Attributes'Access, Adjusted_Stack_Size);
862 pragma Assert (Result = 0);
865 pthread_attr_setdetachstate
866 (Attributes'Access, PTHREAD_CREATE_DETACHED);
867 pragma Assert (Result = 0);
869 -- Since the initial signal mask of a thread is inherited from the
870 -- creator, and the Environment task has all its signals masked, we
871 -- do not need to manipulate caller's signal mask at this point.
872 -- All tasks in RTS will have All_Tasks_Mask initially.
874 Result := pthread_create
875 (T.Common.LL.Thread'Access,
877 Thread_Body_Access (Wrapper),
879 pragma Assert (Result = 0 or else Result = EAGAIN);
881 Succeeded := Result = 0;
883 Result := pthread_attr_destroy (Attributes'Access);
884 pragma Assert (Result = 0);
886 Set_Priority (T, Priority);
893 procedure Finalize_TCB (T : Task_Id) is
894 Result : Interfaces.C.int;
896 Is_Self : constant Boolean := T = Self;
898 procedure Free is new
899 Unchecked_Deallocation (Ada_Task_Control_Block, Task_Id);
902 if not Single_Lock then
903 Result := pthread_mutex_destroy (T.Common.LL.L'Access);
904 pragma Assert (Result = 0);
907 Result := pthread_cond_destroy (T.Common.LL.CV'Access);
908 pragma Assert (Result = 0);
910 if T.Known_Tasks_Index /= -1 then
911 Known_Tasks (T.Known_Tasks_Index) := null;
925 procedure Exit_Task is
934 procedure Abort_Task (T : Task_Id) is
935 Result : Interfaces.C.int;
938 Result := pthread_kill (T.Common.LL.Thread,
939 Signal (System.Interrupt_Management.Abort_Task_Interrupt));
940 pragma Assert (Result = 0);
949 function Check_Exit (Self_ID : ST.Task_Id) return Boolean is
950 pragma Unreferenced (Self_ID);
960 function Check_No_Locks (Self_ID : ST.Task_Id) return Boolean is
961 pragma Unreferenced (Self_ID);
967 ----------------------
968 -- Environment_Task --
969 ----------------------
971 function Environment_Task return Task_Id is
973 return Environment_Task_Id;
974 end Environment_Task;
980 function Suspend_Task
982 Thread_Self : Thread_Id) return Boolean
985 if T.Common.LL.Thread /= Thread_Self then
986 return pthread_kill (T.Common.LL.Thread, SIGSTOP) = 0;
998 Thread_Self : Thread_Id) return Boolean
1001 if T.Common.LL.Thread /= Thread_Self then
1002 return pthread_kill (T.Common.LL.Thread, SIGCONT) = 0;
1012 procedure Initialize (Environment_Task : Task_Id) is
1013 act : aliased struct_sigaction;
1014 old_act : aliased struct_sigaction;
1015 Tmp_Set : aliased sigset_t;
1016 Result : Interfaces.C.int;
1018 function State (Int : System.Interrupt_Management.Interrupt_ID)
1020 pragma Import (C, State, "__gnat_get_interrupt_state");
1021 -- Get interrupt state. Defined in a-init.c
1022 -- The input argument is the interrupt number,
1023 -- and the result is one of the following:
1025 Default : constant Character := 's';
1026 -- 'n' this interrupt not set by any Interrupt_State pragma
1027 -- 'u' Interrupt_State pragma set state to User
1028 -- 'r' Interrupt_State pragma set state to Runtime
1029 -- 's' Interrupt_State pragma set state to System (use "default"
1033 Environment_Task_Id := Environment_Task;
1035 Initialize_Lock (Single_RTS_Lock'Access, RTS_Lock_Level);
1037 -- Initialize the global RTS lock
1039 Specific.Initialize (Environment_Task);
1041 Enter_Task (Environment_Task);
1043 -- Install the abort-signal handler
1045 if State (System.Interrupt_Management.Abort_Task_Interrupt)
1049 act.sa_handler := Abort_Handler'Address;
1051 Result := sigemptyset (Tmp_Set'Access);
1052 pragma Assert (Result = 0);
1053 act.sa_mask := Tmp_Set;
1057 (Signal (Interrupt_Management.Abort_Task_Interrupt),
1058 act'Unchecked_Access,
1059 old_act'Unchecked_Access);
1060 pragma Assert (Result = 0);
1066 Result : Interfaces.C.int;
1069 -- Mask Environment task for all signals. The original mask of the
1070 -- Environment task will be recovered by Interrupt_Server task
1071 -- during the elaboration of s-interr.adb.
1073 System.Interrupt_Management.Operations.Set_Interrupt_Mask
1074 (System.Interrupt_Management.Operations.All_Tasks_Mask'Access);
1076 -- Prepare the set of signals that should unblocked in all tasks
1078 Result := sigemptyset (Unblocked_Signal_Mask'Access);
1079 pragma Assert (Result = 0);
1081 for J in Interrupt_Management.Interrupt_ID loop
1082 if System.Interrupt_Management.Keep_Unmasked (J) then
1083 Result := sigaddset (Unblocked_Signal_Mask'Access, Signal (J));
1084 pragma Assert (Result = 0);
1088 Result := pthread_mutexattr_init (Mutex_Attr'Access);
1089 pragma Assert (Result = 0);
1091 Result := pthread_condattr_init (Cond_Attr'Access);
1092 pragma Assert (Result = 0);
1094 end System.Task_Primitives.Operations;