X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=gcc%2Fada%2F5ftaprop.adb;fp=gcc%2Fada%2F5ftaprop.adb;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=153822872ffbbdbdfabae55213a28b2022ead470;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gcc/ada/5ftaprop.adb b/gcc/ada/5ftaprop.adb deleted file mode 100644 index 15382287..00000000 --- a/gcc/ada/5ftaprop.adb +++ /dev/null @@ -1,998 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- 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 -- --- -- --- B o d y -- --- -- --- $Revision: 1.2 $ --- -- --- Copyright (C) 1991-2001, Florida State University -- --- -- --- GNARL is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNARL is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNARL; see file COPYING. If not, write -- --- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- --- MA 02111-1307, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. It is -- --- now maintained by Ada Core Technologies Inc. in cooperation with Florida -- --- State University (http://www.gnat.com). -- --- -- ------------------------------------------------------------------------------- - --- This is a IRIX (pthread library) version of this package. - --- This package contains all the GNULL primitives that interface directly --- with the underlying OS. - -pragma Polling (Off); --- Turn off polling, we do not want ATC polling to take place during --- tasking operations. It causes infinite loops and other problems. - -with Interfaces.C; --- used for int --- size_t - -with System.Task_Info; - -with System.Tasking.Debug; --- used for Known_Tasks - -with System.IO; --- used for Put_Line - -with System.Interrupt_Management; --- used for Keep_Unmasked --- Abort_Task_Interrupt --- Interrupt_ID - -with System.Interrupt_Management.Operations; --- used for Set_Interrupt_Mask --- All_Tasks_Mask -pragma Elaborate_All (System.Interrupt_Management.Operations); - -with System.Parameters; --- used for Size_Type - -with System.Tasking; --- used for Ada_Task_Control_Block --- Task_ID - -with System.Soft_Links; --- used for Defer/Undefer_Abort - --- Note that we do not use System.Tasking.Initialization directly since --- this is a higher level package that we shouldn't depend on. For example --- when using the restricted run time, it is replaced by --- System.Tasking.Restricted.Initialization - -with System.Program_Info; --- used for Default_Task_Stack --- Default_Time_Slice --- Stack_Guard_Pages --- Pthread_Sched_Signal --- Pthread_Arena_Size - -with System.OS_Interface; --- used for various type, constant, and operations - -with System.OS_Primitives; --- used for Delay_Modes - -with Unchecked_Conversion; -with Unchecked_Deallocation; - -package body System.Task_Primitives.Operations is - - use System.Tasking; - use System.Tasking.Debug; - use Interfaces.C; - use System.OS_Interface; - use System.OS_Primitives; - use System.Parameters; - - package SSL renames System.Soft_Links; - - ------------------ - -- Local Data -- - ------------------ - - -- The followings are logically constants, but need to be initialized - -- at run time. - - ATCB_Key : aliased pthread_key_t; - -- Key used to find the Ada Task_ID associated with a thread - - All_Tasks_L : aliased System.Task_Primitives.RTS_Lock; - -- See comments on locking rules in System.Locking_Rules (spec). - - Environment_Task_ID : Task_ID; - -- A variable to hold Task_ID for the environment task. - - Locking_Policy : Character; - pragma Import (C, Locking_Policy, "__gl_locking_policy"); - - Real_Time_Clock_Id : constant clockid_t := CLOCK_REALTIME; - - Unblocked_Signal_Mask : aliased sigset_t; - - ----------------------- - -- Local Subprograms -- - ----------------------- - - function To_Task_ID is new Unchecked_Conversion (System.Address, Task_ID); - - function To_Address is new Unchecked_Conversion (Task_ID, System.Address); - - procedure Abort_Handler (Sig : Signal); - - ------------------- - -- Abort_Handler -- - ------------------- - - procedure Abort_Handler (Sig : Signal) is - T : Task_ID := Self; - Result : Interfaces.C.int; - Old_Set : aliased sigset_t; - - begin - if T.Deferral_Level = 0 - and then T.Pending_ATC_Level < T.ATC_Nesting_Level - then - -- Make sure signals used for RTS internal purpose are unmasked - - Result := pthread_sigmask - (SIG_UNBLOCK, - Unblocked_Signal_Mask'Unchecked_Access, - Old_Set'Unchecked_Access); - pragma Assert (Result = 0); - - raise Standard'Abort_Signal; - end if; - end Abort_Handler; - - ----------------- - -- Stack_Guard -- - ----------------- - - -- The underlying thread system sets a guard page at the - -- bottom of a thread stack, so nothing is needed. - - procedure Stack_Guard (T : ST.Task_ID; On : Boolean) is - begin - null; - end Stack_Guard; - - ------------------- - -- Get_Thread_Id -- - ------------------- - - function Get_Thread_Id (T : ST.Task_ID) return OSI.Thread_Id is - begin - return T.Common.LL.Thread; - end Get_Thread_Id; - - ---------- - -- Self -- - ---------- - - function Self return Task_ID is - Result : System.Address; - - begin - Result := pthread_getspecific (ATCB_Key); - pragma Assert (Result /= System.Null_Address); - - return To_Task_ID (Result); - end Self; - - --------------------- - -- Initialize_Lock -- - --------------------- - - -- Note: mutexes and cond_variables needed per-task basis are - -- initialized in Initialize_TCB and the Storage_Error is - -- handled. Other mutexes (such as All_Tasks_Lock, Memory_Lock...) - -- used in RTS is initialized before any status change of RTS. - -- Therefore rasing Storage_Error in the following routines - -- should be able to be handled safely. - - procedure Initialize_Lock - (Prio : System.Any_Priority; - L : access Lock) - is - Attributes : aliased pthread_mutexattr_t; - Result : Interfaces.C.int; - - begin - Result := pthread_mutexattr_init (Attributes'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result = ENOMEM then - raise Storage_Error; - end if; - - if Locking_Policy = 'C' then - Result := pthread_mutexattr_setprotocol - (Attributes'Access, PTHREAD_PRIO_PROTECT); - pragma Assert (Result = 0); - - Result := pthread_mutexattr_setprioceiling - (Attributes'Access, Interfaces.C.int (Prio)); - pragma Assert (Result = 0); - end if; - - Result := pthread_mutex_init (L, Attributes'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result = ENOMEM then - Result := pthread_mutexattr_destroy (Attributes'Access); - raise Storage_Error; - end if; - - Result := pthread_mutexattr_destroy (Attributes'Access); - pragma Assert (Result = 0); - end Initialize_Lock; - - procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is - Attributes : aliased pthread_mutexattr_t; - Result : Interfaces.C.int; - - begin - Result := pthread_mutexattr_init (Attributes'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result = ENOMEM then - raise Storage_Error; - end if; - - if Locking_Policy = 'C' then - Result := pthread_mutexattr_setprotocol - (Attributes'Access, PTHREAD_PRIO_PROTECT); - pragma Assert (Result = 0); - - Result := pthread_mutexattr_setprioceiling - (Attributes'Access, Interfaces.C.int (System.Any_Priority'Last)); - pragma Assert (Result = 0); - end if; - - Result := pthread_mutex_init (L, Attributes'Access); - - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result = ENOMEM then - Result := pthread_mutexattr_destroy (Attributes'Access); - raise Storage_Error; - end if; - - Result := pthread_mutexattr_destroy (Attributes'Access); - end Initialize_Lock; - - ------------------- - -- Finalize_Lock -- - ------------------- - - procedure Finalize_Lock (L : access Lock) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_destroy (L); - pragma Assert (Result = 0); - end Finalize_Lock; - - procedure Finalize_Lock (L : access RTS_Lock) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_destroy (L); - pragma Assert (Result = 0); - end Finalize_Lock; - - ---------------- - -- Write_Lock -- - ---------------- - - procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_lock (L); - Ceiling_Violation := Result = EINVAL; - - -- assumes the cause of EINVAL is a priority ceiling violation - - pragma Assert (Result = 0 or else Result = EINVAL); - end Write_Lock; - - procedure Write_Lock (L : access RTS_Lock) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_lock (L); - pragma Assert (Result = 0); - end Write_Lock; - - procedure Write_Lock (T : Task_ID) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_lock (T.Common.LL.L'Access); - pragma Assert (Result = 0); - end Write_Lock; - - --------------- - -- Read_Lock -- - --------------- - - procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is - begin - Write_Lock (L, Ceiling_Violation); - end Read_Lock; - - ------------ - -- Unlock -- - ------------ - - procedure Unlock (L : access Lock) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_unlock (L); - pragma Assert (Result = 0); - end Unlock; - - procedure Unlock (L : access RTS_Lock) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_unlock (L); - pragma Assert (Result = 0); - end Unlock; - - procedure Unlock (T : Task_ID) is - Result : Interfaces.C.int; - - begin - Result := pthread_mutex_unlock (T.Common.LL.L'Access); - pragma Assert (Result = 0); - end Unlock; - - ----------- - -- Sleep -- - ----------- - - procedure Sleep - (Self_ID : ST.Task_ID; - Reason : System.Tasking.Task_States) - is - Result : Interfaces.C.int; - begin - pragma Assert (Self_ID = Self); - Result := pthread_cond_wait (Self_ID.Common.LL.CV'Access, - Self_ID.Common.LL.L'Access); - - -- EINTR is not considered a failure. - - pragma Assert (Result = 0 or else Result = EINTR); - end Sleep; - - ----------------- - -- Timed_Sleep -- - ----------------- - - procedure Timed_Sleep - (Self_ID : Task_ID; - Time : Duration; - Mode : ST.Delay_Modes; - Reason : Task_States; - Timedout : out Boolean; - Yielded : out Boolean) - is - Check_Time : constant Duration := Monotonic_Clock; - Abs_Time : Duration; - Request : aliased timespec; - Result : Interfaces.C.int; - - begin - Timedout := True; - Yielded := False; - - if Mode = Relative then - Abs_Time := Duration'Min (Time, Max_Sensible_Delay) + Check_Time; - else - Abs_Time := Duration'Min (Check_Time + Max_Sensible_Delay, Time); - end if; - - if Abs_Time > Check_Time then - Request := To_Timespec (Abs_Time); - - loop - exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level - or else Self_ID.Pending_Priority_Change; - - Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access, - Self_ID.Common.LL.L'Access, Request'Access); - - exit when Abs_Time <= Monotonic_Clock; - - if Result = 0 or else errno = EINTR then - Timedout := False; - exit; - end if; - end loop; - end if; - end Timed_Sleep; - - ----------------- - -- Timed_Delay -- - ----------------- - - -- This is for use in implementing delay statements, so - -- we assume the caller is abort-deferred but is holding - -- no locks. - - procedure Timed_Delay - (Self_ID : Task_ID; - Time : Duration; - Mode : ST.Delay_Modes) - is - Check_Time : constant Duration := Monotonic_Clock; - Abs_Time : Duration; - Request : aliased timespec; - Result : Interfaces.C.int; - - begin - -- Only the little window between deferring abort and - -- locking Self_ID is the reason we need to - -- check for pending abort and priority change below! :( - - SSL.Abort_Defer.all; - Write_Lock (Self_ID); - - if Mode = Relative then - Abs_Time := Time + Check_Time; - else - Abs_Time := Duration'Min (Check_Time + Max_Sensible_Delay, Time); - end if; - - if Abs_Time > Check_Time then - Request := To_Timespec (Abs_Time); - Self_ID.Common.State := Delay_Sleep; - - loop - if Self_ID.Pending_Priority_Change then - Self_ID.Pending_Priority_Change := False; - Self_ID.Common.Base_Priority := Self_ID.New_Base_Priority; - Set_Priority (Self_ID, Self_ID.Common.Base_Priority); - end if; - - exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level; - - Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access, - Self_ID.Common.LL.L'Access, Request'Access); - exit when Abs_Time <= Monotonic_Clock; - - pragma Assert (Result = 0 - or else Result = ETIMEDOUT - or else Result = EINTR); - end loop; - - Self_ID.Common.State := Runnable; - end if; - - Unlock (Self_ID); - Yield; - SSL.Abort_Undefer.all; - end Timed_Delay; - - --------------------- - -- Monotonic_Clock -- - --------------------- - - function Monotonic_Clock return Duration is - TS : aliased timespec; - Result : Interfaces.C.int; - - begin - Result := clock_gettime (Real_Time_Clock_Id, TS'Unchecked_Access); - pragma Assert (Result = 0); - return To_Duration (TS); - end Monotonic_Clock; - - ------------------- - -- RT_Resolution -- - ------------------- - - function RT_Resolution return Duration is - begin - -- The clock_getres (Real_Time_Clock_Id) function appears to return - -- the interrupt resolution of the realtime clock and not the actual - -- resolution of reading the clock. Even though this last value is - -- only guaranteed to be 100 Hz, at least the Origin 200 appears to - -- have a microsecond resolution or better. - -- ??? We should figure out a method to return the right value on - -- all SGI hardware. - - return 0.000_001; -- Assume microsecond resolution of clock - end RT_Resolution; - - ------------ - -- Wakeup -- - ------------ - - procedure Wakeup (T : ST.Task_ID; Reason : System.Tasking.Task_States) is - Result : Interfaces.C.int; - begin - Result := pthread_cond_signal (T.Common.LL.CV'Access); - pragma Assert (Result = 0); - end Wakeup; - - ----------- - -- Yield -- - ----------- - - procedure Yield (Do_Yield : Boolean := True) is - Result : Interfaces.C.int; - begin - if Do_Yield then - Result := sched_yield; - end if; - end Yield; - - ------------------ - -- Set_Priority -- - ------------------ - - procedure Set_Priority - (T : Task_ID; - Prio : System.Any_Priority; - Loss_Of_Inheritance : Boolean := False) - is - Result : Interfaces.C.int; - Param : aliased struct_sched_param; - Sched_Policy : Interfaces.C.int; - - use type System.Task_Info.Task_Info_Type; - - function To_Int is new Unchecked_Conversion - (System.Task_Info.Thread_Scheduling_Policy, Interfaces.C.int); - - begin - T.Common.Current_Priority := Prio; - Param.sched_priority := Interfaces.C.int (Prio); - - if T.Common.Task_Info /= null then - Sched_Policy := To_Int (T.Common.Task_Info.Policy); - else - Sched_Policy := SCHED_FIFO; - end if; - - Result := pthread_setschedparam (T.Common.LL.Thread, Sched_Policy, - Param'Access); - pragma Assert (Result = 0); - end Set_Priority; - - ------------------ - -- Get_Priority -- - ------------------ - - function Get_Priority (T : Task_ID) return System.Any_Priority is - begin - return T.Common.Current_Priority; - end Get_Priority; - - ---------------- - -- Enter_Task -- - ---------------- - - procedure Enter_Task (Self_ID : Task_ID) is - Result : Interfaces.C.int; - - function To_Int is new Unchecked_Conversion - (System.Task_Info.CPU_Number, Interfaces.C.int); - - use System.Task_Info; - - begin - Self_ID.Common.LL.Thread := pthread_self; - Result := pthread_setspecific (ATCB_Key, To_Address (Self_ID)); - pragma Assert (Result = 0); - - if Self_ID.Common.Task_Info /= null - and then Self_ID.Common.Task_Info.Scope = PTHREAD_SCOPE_SYSTEM - and then Self_ID.Common.Task_Info.Runon_CPU /= ANY_CPU - then - Result := pthread_setrunon_np - (To_Int (Self_ID.Common.Task_Info.Runon_CPU)); - pragma Assert (Result = 0); - end if; - - Lock_All_Tasks_List; - - for J in Known_Tasks'Range loop - if Known_Tasks (J) = null then - Known_Tasks (J) := Self_ID; - Self_ID.Known_Tasks_Index := J; - exit; - end if; - end loop; - - Unlock_All_Tasks_List; - end Enter_Task; - - -------------- - -- New_ATCB -- - -------------- - - function New_ATCB (Entry_Num : Task_Entry_Index) return Task_ID is - begin - return new Ada_Task_Control_Block (Entry_Num); - end New_ATCB; - - -------------------- - -- Initialize_TCB -- - -------------------- - - procedure Initialize_TCB (Self_ID : Task_ID; Succeeded : out Boolean) is - Result : Interfaces.C.int; - Cond_Attr : aliased pthread_condattr_t; - - begin - Initialize_Lock (Self_ID.Common.LL.L'Access, All_Tasks_Level); - - Result := pthread_condattr_init (Cond_Attr'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result /= 0 then - Result := pthread_mutex_destroy (Self_ID.Common.LL.L'Access); - pragma Assert (Result = 0); - - Succeeded := False; - return; - end if; - - Result := pthread_cond_init (Self_ID.Common.LL.CV'Access, - Cond_Attr'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result = 0 then - Succeeded := True; - else - Result := pthread_mutex_destroy (Self_ID.Common.LL.L'Access); - pragma Assert (Result = 0); - Succeeded := False; - end if; - - Result := pthread_condattr_destroy (Cond_Attr'Access); - pragma Assert (Result = 0); - end Initialize_TCB; - - ----------------- - -- Create_Task -- - ----------------- - - procedure Create_Task - (T : Task_ID; - Wrapper : System.Address; - Stack_Size : System.Parameters.Size_Type; - Priority : System.Any_Priority; - Succeeded : out Boolean) - is - use System.Task_Info; - - Attributes : aliased pthread_attr_t; - Sched_Param : aliased struct_sched_param; - Adjusted_Stack_Size : Interfaces.C.size_t; - Result : Interfaces.C.int; - - function Thread_Body_Access is new - Unchecked_Conversion (System.Address, Thread_Body); - - function To_Int is new Unchecked_Conversion - (System.Task_Info.Thread_Scheduling_Scope, Interfaces.C.int); - function To_Int is new Unchecked_Conversion - (System.Task_Info.Thread_Scheduling_Inheritance, Interfaces.C.int); - function To_Int is new Unchecked_Conversion - (System.Task_Info.Thread_Scheduling_Policy, Interfaces.C.int); - - begin - if Stack_Size = System.Parameters.Unspecified_Size then - Adjusted_Stack_Size := - Interfaces.C.size_t (System.Program_Info.Default_Task_Stack); - - elsif Stack_Size < Size_Type (Minimum_Stack_Size) then - Adjusted_Stack_Size := - Interfaces.C.size_t (Minimum_Stack_Size); - - else - Adjusted_Stack_Size := Interfaces.C.size_t (Stack_Size); - end if; - - Result := pthread_attr_init (Attributes'Access); - pragma Assert (Result = 0 or else Result = ENOMEM); - - if Result /= 0 then - Succeeded := False; - return; - end if; - - Result := pthread_attr_setdetachstate - (Attributes'Access, PTHREAD_CREATE_DETACHED); - pragma Assert (Result = 0); - - Result := pthread_attr_setstacksize - (Attributes'Access, Interfaces.C.size_t (Adjusted_Stack_Size)); - pragma Assert (Result = 0); - - if T.Common.Task_Info /= null then - Result := pthread_attr_setscope - (Attributes'Access, To_Int (T.Common.Task_Info.Scope)); - pragma Assert (Result = 0); - - Result := pthread_attr_setinheritsched - (Attributes'Access, To_Int (T.Common.Task_Info.Inheritance)); - pragma Assert (Result = 0); - - Result := pthread_attr_setschedpolicy - (Attributes'Access, To_Int (T.Common.Task_Info.Policy)); - pragma Assert (Result = 0); - - Sched_Param.sched_priority := - Interfaces.C.int (T.Common.Task_Info.Priority); - - Result := pthread_attr_setschedparam - (Attributes'Access, Sched_Param'Access); - pragma Assert (Result = 0); - end if; - - -- Since the initial signal mask of a thread is inherited from the - -- creator, and the Environment task has all its signals masked, we - -- do not need to manipulate caller's signal mask at this point. - -- All tasks in RTS will have All_Tasks_Mask initially. - - Result := pthread_create - (T.Common.LL.Thread'Access, - Attributes'Access, - Thread_Body_Access (Wrapper), - To_Address (T)); - - if Result /= 0 - and then T.Common.Task_Info /= null - and then T.Common.Task_Info.Scope = PTHREAD_SCOPE_SYSTEM - then - -- The pthread_create call may have failed because we - -- asked for a system scope pthread and none were - -- available (probably because the program was not executed - -- by the superuser). Let's try for a process scope pthread - -- instead of raising Tasking_Error. - - System.IO.Put_Line - ("Request for PTHREAD_SCOPE_SYSTEM in Task_Info pragma for task"); - System.IO.Put (""""); - System.IO.Put (T.Common.Task_Image.all); - System.IO.Put_Line (""" could not be honored. "); - System.IO.Put_Line ("Scope changed to PTHREAD_SCOPE_PROCESS"); - - T.Common.Task_Info.Scope := PTHREAD_SCOPE_PROCESS; - Result := pthread_attr_setscope - (Attributes'Access, To_Int (T.Common.Task_Info.Scope)); - pragma Assert (Result = 0); - - Result := pthread_create - (T.Common.LL.Thread'Access, - Attributes'Access, - Thread_Body_Access (Wrapper), - To_Address (T)); - end if; - - pragma Assert (Result = 0 or else Result = EAGAIN); - - Succeeded := Result = 0; - - Set_Priority (T, Priority); - - Result := pthread_attr_destroy (Attributes'Access); - pragma Assert (Result = 0); - end Create_Task; - - ------------------ - -- Finalize_TCB -- - ------------------ - - procedure Finalize_TCB (T : Task_ID) is - Result : Interfaces.C.int; - Tmp : Task_ID := T; - - procedure Free is new - Unchecked_Deallocation (Ada_Task_Control_Block, Task_ID); - - begin - Result := pthread_mutex_destroy (T.Common.LL.L'Access); - pragma Assert (Result = 0); - - Result := pthread_cond_destroy (T.Common.LL.CV'Access); - pragma Assert (Result = 0); - - if T.Known_Tasks_Index /= -1 then - Known_Tasks (T.Known_Tasks_Index) := null; - end if; - - Free (Tmp); - end Finalize_TCB; - - --------------- - -- Exit_Task -- - --------------- - - procedure Exit_Task is - begin - pthread_exit (System.Null_Address); - end Exit_Task; - - ---------------- - -- Abort_Task -- - ---------------- - - procedure Abort_Task (T : Task_ID) is - Result : Interfaces.C.int; - begin - Result := pthread_kill (T.Common.LL.Thread, - Signal (System.Interrupt_Management.Abort_Task_Interrupt)); - pragma Assert (Result = 0); - end Abort_Task; - - ---------------- - -- Check_Exit -- - ---------------- - - -- Dummy versions. The only currently working versions is for solaris - -- (native). - - function Check_Exit (Self_ID : ST.Task_ID) return Boolean is - begin - return True; - end Check_Exit; - - -------------------- - -- Check_No_Locks -- - -------------------- - - function Check_No_Locks (Self_ID : ST.Task_ID) return Boolean is - begin - return True; - end Check_No_Locks; - - ---------------------- - -- Environment_Task -- - ---------------------- - - function Environment_Task return Task_ID is - begin - return Environment_Task_ID; - end Environment_Task; - - ------------------------- - -- Lock_All_Tasks_List -- - ------------------------- - - procedure Lock_All_Tasks_List is - begin - Write_Lock (All_Tasks_L'Access); - end Lock_All_Tasks_List; - - --------------------------- - -- Unlock_All_Tasks_List -- - --------------------------- - - procedure Unlock_All_Tasks_List is - begin - Unlock (All_Tasks_L'Access); - end Unlock_All_Tasks_List; - - ------------------ - -- Suspend_Task -- - ------------------ - - function Suspend_Task - (T : ST.Task_ID; - Thread_Self : Thread_Id) return Boolean is - begin - return False; - end Suspend_Task; - - ----------------- - -- Resume_Task -- - ----------------- - - function Resume_Task - (T : ST.Task_ID; - Thread_Self : Thread_Id) return Boolean is - begin - return False; - end Resume_Task; - - ---------------- - -- Initialize -- - ---------------- - - procedure Initialize (Environment_Task : Task_ID) is - act : aliased struct_sigaction; - old_act : aliased struct_sigaction; - Tmp_Set : aliased sigset_t; - Result : Interfaces.C.int; - - begin - Environment_Task_ID := Environment_Task; - - -- Initialize the lock used to synchronize chain of all ATCBs. - Initialize_Lock (All_Tasks_L'Access, All_Tasks_Level); - - Enter_Task (Environment_Task); - - -- Install the abort-signal handler - - act.sa_flags := 0; - act.sa_handler := Abort_Handler'Address; - - Result := sigemptyset (Tmp_Set'Access); - pragma Assert (Result = 0); - act.sa_mask := Tmp_Set; - - Result := - sigaction ( - Signal (System.Interrupt_Management.Abort_Task_Interrupt), - act'Unchecked_Access, - old_act'Unchecked_Access); - pragma Assert (Result = 0); - end Initialize; - -begin - declare - Result : Interfaces.C.int; - begin - -- Mask Environment task for all signals. The original mask of the - -- Environment task will be recovered by Interrupt_Server task - -- during the elaboration of s-interr.adb. - - System.Interrupt_Management.Operations.Set_Interrupt_Mask - (System.Interrupt_Management.Operations.All_Tasks_Mask'Access); - - -- Prepare the set of signals that should unblocked in all tasks - - Result := sigemptyset (Unblocked_Signal_Mask'Access); - pragma Assert (Result = 0); - - for J in Interrupt_Management.Interrupt_ID loop - if System.Interrupt_Management.Keep_Unmasked (J) then - Result := sigaddset (Unblocked_Signal_Mask'Access, Signal (J)); - pragma Assert (Result = 0); - end if; - end loop; - - Result := pthread_key_create (ATCB_Key'Access, null); - pragma Assert (Result = 0); - - -- Pick the highest resolution Clock for Clock_Realtime - -- ??? This code currently doesn't work (see c94007[ab] for example) - -- - -- if syssgi (SGI_CYCLECNTR_SIZE) = 64 then - -- Real_Time_Clock_Id := CLOCK_SGI_CYCLE; - -- else - -- Real_Time_Clock_Id := CLOCK_REALTIME; - -- end if; - end; -end System.Task_Primitives.Operations;