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Diffstat (limited to 'gcc/ada/s-taprop-irix-athread.adb')
| -rw-r--r-- | gcc/ada/s-taprop-irix-athread.adb | 955 |
1 files changed, 955 insertions, 0 deletions
diff --git a/gcc/ada/s-taprop-irix-athread.adb b/gcc/ada/s-taprop-irix-athread.adb new file mode 100644 index 00000000000..3c70a347ef2 --- /dev/null +++ b/gcc/ada/s-taprop-irix-athread.adb @@ -0,0 +1,955 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 -- +-- -- +-- Copyright (C) 1992-2004, Free Software Foundation, Inc. -- +-- -- +-- 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. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is an Irix (old athread 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.Tasking.Debug; +-- used for Known_Tasks + +with System.Task_Info; + +with System.Interrupt_Management; +-- used for Keep_Unmasked +-- Abort_Task_Interrupt +-- Interrupt_ID + +with System.Parameters; +-- used for Size_Type + +with System.Tasking; +-- used for Ada_Task_Control_Block +-- Task_ID + +with System.Program_Info; +-- used for Default_Task_Stack +-- Default_Time_Slice +-- Stack_Guard_Pages +-- Pthread_Sched_Signal +-- Pthread_Arena_Size + +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.OS_Primitives; +-- used for Delay_Modes + +with System.Storage_Elements; +-- used for To_Address + +with Unchecked_Conversion; +with Unchecked_Deallocation; + +package body System.Task_Primitives.Operations is + + use System.Tasking.Debug; + use System.Tasking; + use Interfaces.C; + use System.OS_Interface; + use System.Parameters; + use System.OS_Primitives; + + package SSL renames System.Soft_Links; + + ----------------- + -- Local Data -- + ----------------- + + -- The followings are logically constants, but need to be initialized + -- at run time. + + Single_RTS_Lock : aliased RTS_Lock; + -- This is a lock to allow only one thread of control in the RTS at + -- a time; it is used to execute in mutual exclusion from all other tasks. + -- Used mainly in Single_Lock mode, but also to protect All_Tasks_List + + 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"); + + Clock_Address : constant System.Address := + System.Storage_Elements.To_Address (16#200F90#); + + RT_Clock_Id : clockid_t; + for RT_Clock_Id'Address use Clock_Address; + + ----------------------- + -- Local Subprograms -- + ----------------------- + + procedure Initialize_Athread_Library; + + function To_Task_ID is new Unchecked_Conversion (System.Address, Task_ID); + + function To_Address is new Unchecked_Conversion (Task_ID, System.Address); + + ------------------- + -- Stack_Guard -- + ------------------- + + -- The underlying thread system sets a guard page at the + -- bottom of a thread stack, so nothing is needed. + -- ??? Check the comment above + + procedure Stack_Guard (T : ST.Task_ID; On : Boolean) is + pragma Unreferenced (T); + pragma Unreferenced (On); + 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 + begin + return To_Task_ID (pthread_get_current_ada_tcb); + 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 RTS_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); + + if Result = FUNC_ERR then + raise Storage_Error; + end if; + + if Locking_Policy = 'C' then + + Result := pthread_mutexattr_setqueueorder + (Attributes'Access, MUTEX_PRIORITY_CEILING); + + pragma Assert (Result /= FUNC_ERR); + + Result := pthread_mutexattr_setceilingprio + (Attributes'Access, Interfaces.C.int (Prio)); + + pragma Assert (Result /= FUNC_ERR); + end if; + + Result := pthread_mutex_init (L, Attributes'Access); + + if Result = FUNC_ERR then + Result := pthread_mutexattr_destroy (Attributes'Access); + raise Storage_Error; + end if; + + Result := pthread_mutexattr_destroy (Attributes'Access); + end Initialize_Lock; + + procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is + pragma Unreferenced (Level); + + Attributes : aliased pthread_mutexattr_t; + Result : Interfaces.C.int; + + begin + Result := pthread_mutexattr_init (Attributes'Access); + + if Result = FUNC_ERR then + raise Storage_Error; + end if; + + if Locking_Policy = 'C' then + Result := pthread_mutexattr_setqueueorder + (Attributes'Access, MUTEX_PRIORITY_CEILING); + pragma Assert (Result /= FUNC_ERR); + + Result := pthread_mutexattr_setceilingprio + (Attributes'Access, Interfaces.C.int (System.Any_Priority'Last)); + pragma Assert (Result /= FUNC_ERR); + end if; + + Result := pthread_mutex_init (L, Attributes'Access); + + if Result = FUNC_ERR 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 = FUNC_ERR and then errno = EINVAL; + pragma Assert (Result /= FUNC_ERR); + end Write_Lock; + + procedure Write_Lock + (L : access RTS_Lock; Global_Lock : Boolean := False) + is + Result : Interfaces.C.int; + begin + if not Single_Lock or else Global_Lock then + Result := pthread_mutex_lock (L); + pragma Assert (Result = 0); + end if; + end Write_Lock; + + procedure Write_Lock (T : Task_ID) is + Result : Interfaces.C.int; + begin + if not Single_Lock then + Result := pthread_mutex_lock (T.Common.LL.L'Access); + pragma Assert (Result = 0); + end if; + 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; Global_Lock : Boolean := False) is + Result : Interfaces.C.int; + begin + if not Single_Lock or else Global_Lock then + Result := pthread_mutex_unlock (L); + pragma Assert (Result = 0); + end if; + end Unlock; + + procedure Unlock (T : Task_ID) is + Result : Interfaces.C.int; + begin + if not Single_Lock then + Result := pthread_mutex_unlock (T.Common.LL.L'Access); + pragma Assert (Result = 0); + end if; + end Unlock; + + ----------- + -- Sleep -- + ----------- + + procedure Sleep + (Self_ID : ST.Task_ID; + Reason : System.Tasking.Task_States) + is + pragma Unreferenced (Reason); + + Result : Interfaces.C.int; + + begin + if Single_Lock then + Result := pthread_cond_wait + (Self_ID.Common.LL.CV'Access, Single_RTS_Lock'Access); + else + Result := pthread_cond_wait + (Self_ID.Common.LL.CV'Access, Self_ID.Common.LL.L'Access); + end if; + + -- 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 : System.Tasking.Task_States; + Timedout : out Boolean; + Yielded : out Boolean) + is + pragma Unreferenced (Reason); + + Check_Time : constant Duration := Monotonic_Clock; + Abs_Time : Duration; + Request : aliased struct_timeval; + 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_Timeval (Abs_Time); + + loop + exit when Self_ID.Pending_ATC_Level < Self_ID.ATC_Nesting_Level + or else Self_ID.Pending_Priority_Change; + + if Single_Lock then + Result := pthread_cond_timedwait + (Self_ID.Common.LL.CV'Access, Single_RTS_Lock'Access, + Request'Access); + + else + Result := pthread_cond_timedwait + (Self_ID.Common.LL.CV'Access, Self_ID.Common.LL.L'Access, + Request'Access); + end if; + + exit when Abs_Time <= Monotonic_Clock; + + if Result = 0 or Result = EINTR then + -- somebody may have called Wakeup for us + Timedout := False; + exit; + end if; + + pragma Assert (Result = ETIMEDOUT + or else (Result = -1 and then errno = EAGAIN)); + end loop; + end if; + end Timed_Sleep; + + ----------------- + -- Timed_Delay -- + ----------------- + + 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 struct_timeval; + 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; + + if Single_Lock then + Lock_RTS; + end if; + + 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_Timeval (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; + + if Single_Lock then + Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access, + Single_RTS_Lock'Access, Request'Access); + else + Result := pthread_cond_timedwait (Self_ID.Common.LL.CV'Access, + Self_ID.Common.LL.L'Access, Request'Access); + end if; + + exit when Abs_Time <= Monotonic_Clock; + + pragma Assert (Result = 0 or else + Result = ETIMEDOUT or else + (Result = -1 and then errno = EAGAIN) or else + Result = EINTR); + end loop; + + Self_ID.Common.State := Runnable; + end if; + + Unlock (Self_ID); + + if Single_Lock then + Unlock_RTS; + end if; + + pthread_yield; + SSL.Abort_Undefer.all; + end Timed_Delay; + + --------------------- + -- Monotonic_Clock -- + --------------------- + + function Monotonic_Clock return Duration is + type timeval is record + tv_sec : Integer; + tv_usec : Integer; + end record; + pragma Convention (C, timeval); + + tv : aliased timeval; + + procedure gettimeofday (tp : access timeval); + pragma Import (C, gettimeofday, "gettimeofday", "gettimeofday"); + + begin + gettimeofday (tv'Access); + return Duration (tv.tv_sec) + Duration (tv.tv_usec) / 1_000_000.0; + end Monotonic_Clock; + + ------------------- + -- RT_Resolution -- + ------------------- + + function RT_Resolution return Duration is + begin + return 10#1.0#E-6; + end RT_Resolution; + + ------------ + -- Wakeup -- + ------------ + + procedure Wakeup + (T : ST.Task_ID; + Reason : System.Tasking.Task_States) + is + pragma Unreferenced (Reason); + 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 + begin + if Do_Yield then + pthread_yield; + end if; + end Yield; + + ------------------ + -- Set_Priority -- + ------------------ + + procedure Set_Priority + (T : Task_ID; + Prio : System.Any_Priority; + Loss_Of_Inheritance : Boolean := False) + is + pragma Unreferenced (Loss_Of_Inheritance); + + Result : Interfaces.C.int; + + begin + T.Common.Current_Priority := Prio; + Result := pthread_setprio (T.Common.LL.Thread, Interfaces.C.int (Prio)); + pragma Assert (Result /= FUNC_ERR); + + 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; + + begin + Self_ID.Common.LL.Thread := pthread_self; + Self_ID.Common.LL.LWP := sproc_self; + + Result := + pthread_set_ada_tcb (Self_ID.Common.LL.Thread, To_Address (Self_ID)); + + pragma Assert (Result = 0); + + Lock_RTS; + + 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_RTS; + 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; + + ------------------- + -- Is_Valid_Task -- + ------------------- + + function Is_Valid_Task return Boolean is + begin + return False; + end Is_Valid_Task; + + ----------------------------- + -- Register_Foreign_Thread -- + ----------------------------- + + function Register_Foreign_Thread return Task_ID is + begin + return null; + end Register_Foreign_Thread; + + ---------------------- + -- Initialize_TCB -- + ---------------------- + + procedure Initialize_TCB (Self_ID : Task_ID; Succeeded : out Boolean) is + Result : Interfaces.C.int; + Cond_Attr : aliased pthread_condattr_t; + + begin + if not Single_Lock then + Initialize_Lock (Self_ID.Common.LL.L'Access, ATCB_Level); + end if; + + Result := pthread_condattr_init (Cond_Attr'Access); + pragma Assert (Result = 0 or else Result = ENOMEM); + + if Result = 0 then + Result := pthread_cond_init (Self_ID.Common.LL.CV'Access, + Cond_Attr'Access); + pragma Assert (Result = 0 or else Result = ENOMEM); + end if; + + if Result = 0 then + Succeeded := True; + else + if not Single_Lock then + Result := pthread_mutex_destroy (Self_ID.Common.LL.L'Access); + pragma Assert (Result = 0); + end if; + + 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 + Attributes : aliased pthread_attr_t; + Adjusted_Stack_Size : Interfaces.C.size_t; + Result : Interfaces.C.int; + + function Thread_Body_Access is new + Unchecked_Conversion (System.Address, start_addr); + + function To_Resource_T is new Unchecked_Conversion + (System.Task_Info.Resource_Vector_T, System.OS_Interface.resource_t); + + use System.Task_Info; + + begin + if Stack_Size = Unspecified_Size then + Adjusted_Stack_Size := + Interfaces.C.size_t (System.Program_Info.Default_Task_Stack); + + elsif Stack_Size < 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, 1); + pragma Assert (Result = 0); + + Result := pthread_attr_setstacksize + (Attributes'Access, Adjusted_Stack_Size); + pragma Assert (Result = 0); + + if T.Common.Task_Info /= null then + Result := pthread_attr_setresources + (Attributes'Access, + To_Resource_T (T.Common.Task_Info.Thread_Resources)); + pragma Assert (Result /= FUNC_ERR); + + if T.Common.Task_Info.Thread_Timeslice /= 0.0 then + declare + use System.OS_Interface; + + Tv : aliased struct_timeval := To_Timeval + (T.Common.Task_Info.Thread_Timeslice); + begin + Result := pthread_attr_set_tslice + (Attributes'Access, Tv'Access); + end; + end if; + + if T.Common.Task_Info.Bound_To_Sproc then + Result := pthread_attr_set_boundtosproc + (Attributes'Access, PTHREAD_BOUND); + Result := pthread_attr_set_bsproc + (Attributes'Access, T.Common.Task_Info.Sproc); + end if; + + 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)); + pragma Assert (Result = 0 or else Result = EAGAIN); + + Succeeded := Result = 0; + + Set_Priority (T, Priority); + + Result := pthread_attr_destroy (Attributes'Access); + pragma Assert (Result /= FUNC_ERR); + end Create_Task; + + ------------------ + -- Finalize_TCB -- + ------------------ + + procedure Finalize_TCB (T : Task_ID) is + procedure Free is new + Unchecked_Deallocation (Ada_Task_Control_Block, Task_ID); + + Result : Interfaces.C.int; + Tmp : Task_ID := T; + + begin + if not Single_Lock then + Result := pthread_mutex_destroy (T.Common.LL.L'Access); + pragma Assert (Result = 0); + end if; + + 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 + Result : Interfaces.C.int; + begin + Result := pthread_set_ada_tcb (pthread_self, System.Null_Address); + pragma Assert (Result = 0); + end Exit_Task; + + ---------------- + -- Abort_Task -- + ---------------- + + procedure Abort_Task (T : Task_ID) is + Result : Interfaces.C.int; + begin + Result := + pthread_kill (T.Common.LL.Thread, + Interfaces.C.int + (System.Interrupt_Management.Abort_Task_Interrupt)); + pragma Assert (Result = 0); + end Abort_Task; + + ---------------- + -- Check_Exit -- + ---------------- + + -- Dummy version + + function Check_Exit (Self_ID : ST.Task_ID) return Boolean is + pragma Unreferenced (Self_ID); + + begin + return True; + end Check_Exit; + + -------------------- + -- Check_No_Locks -- + -------------------- + + function Check_No_Locks (Self_ID : ST.Task_ID) return Boolean is + pragma Unreferenced (Self_ID); + 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_RTS -- + -------------- + + procedure Lock_RTS is + begin + Write_Lock (Single_RTS_Lock'Access, Global_Lock => True); + end Lock_RTS; + + ---------------- + -- Unlock_RTS -- + ---------------- + + procedure Unlock_RTS is + begin + Unlock (Single_RTS_Lock'Access, Global_Lock => True); + end Unlock_RTS; + + ------------------ + -- Suspend_Task -- + ------------------ + + function Suspend_Task + (T : ST.Task_ID; + Thread_Self : Thread_Id) return Boolean + is + begin + if T.Common.LL.Thread /= Thread_Self then + return pthread_suspend (T.Common.LL.Thread) = 0; + else + return True; + end if; + end Suspend_Task; + + ----------------- + -- Resume_Task -- + ----------------- + + function Resume_Task + (T : ST.Task_ID; + Thread_Self : Thread_Id) return Boolean + is + begin + if T.Common.LL.Thread /= Thread_Self then + return pthread_resume (T.Common.LL.Thread) = 0; + else + return True; + end if; + end Resume_Task; + + ---------------- + -- Initialize -- + ---------------- + + procedure Initialize (Environment_Task : Task_ID) is + begin + Environment_Task_ID := Environment_Task; + + Initialize_Lock (Single_RTS_Lock'Access, RTS_Lock_Level); + -- Initialize the lock used to synchronize chain of all ATCBs. + + Enter_Task (Environment_Task); + + Set_Priority (Environment_Task, + Environment_Task.Common.Current_Priority); + end Initialize; + + -------------------------------- + -- Initialize_Athread_Library -- + -------------------------------- + + procedure Initialize_Athread_Library is + Result : Interfaces.C.int; + Init : aliased pthread_init_struct; + + package PINF renames System.Program_Info; + package C renames Interfaces.C; + + begin + Init.conf_initsize := C.int (PINF.Pthread_Arena_Size); + Init.max_sproc_count := C.int (PINF.Max_Sproc_Count); + Init.sproc_stack_size := C.size_t (PINF.Sproc_Stack_Size); + Init.os_default_priority := C.int (PINF.Os_Default_Priority); + Init.os_sched_signal := C.int (PINF.Pthread_Sched_Signal); + Init.guard_pages := C.int (PINF.Stack_Guard_Pages); + Init.init_sproc_count := C.int (PINF.Initial_Sproc_Count); + + Result := pthread_exec_begin (Init'Access); + pragma Assert (Result /= FUNC_ERR); + + if Result = FUNC_ERR then + raise Storage_Error; -- Insufficient resources. + end if; + end Initialize_Athread_Library; + +-- Package initialization + +begin + Initialize_Athread_Library; +end System.Task_Primitives.Operations; |