diff options
Diffstat (limited to 'gcc/ada/g-thread.ads')
| -rw-r--r-- | gcc/ada/g-thread.ads | 53 |
1 files changed, 51 insertions, 2 deletions
diff --git a/gcc/ada/g-thread.ads b/gcc/ada/g-thread.ads index e39f896e25b..5d0acb27fb8 100644 --- a/gcc/ada/g-thread.ads +++ b/gcc/ada/g-thread.ads @@ -6,7 +6,7 @@ -- -- -- S p e c -- -- -- --- Copyright (C) 1998-2000 Ada Core Technologies, Inc. -- +-- Copyright (C) 1998-2003 Ada Core Technologies, Inc. -- -- -- -- GNAT 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- -- @@ -26,7 +26,8 @@ -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- --- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ @@ -36,6 +37,7 @@ -- e.g. a C program, to create a thread that the Ada run-time knows about. with System; +with Ada.Task_Identification; package GNAT.Threads is @@ -68,6 +70,46 @@ package GNAT.Threads is -- extern void *__gnat_create_thread -- (void (*code)(void *, void *), void *parm, int size, int prio); + function Register_Thread return System.Address; + pragma Export (C, Register_Thread, "__gnat_register_thread"); + -- Create an Ada task Id for the current thread if needed. + -- If the thread could not be registered, System.Null_Address is returned. + -- + -- This function returns the Ada Id of the current task that can then be + -- used as a parameter to the procedures below. + -- + -- C declaration: + -- + -- extern void *__gnat_register_thread (); + -- + -- Here is a typical usage of the Register/Unregister_Thread procedures: + -- + -- void thread_body () + -- { + -- void *task_id = __gnat_register_thread (); + -- ... thread body ... + -- __gnat_unregister_thread (); + -- } + + procedure Unregister_Thread; + pragma Export (C, Unregister_Thread, "__gnat_unregister_thread"); + -- Unregister the current task from the GNAT run time and destroy the + -- memory allocated for its task id. + -- + -- C declaration: + -- + -- extern void __gnat_unregister_thread (); + + procedure Unregister_Thread_Id (Thread : System.Address); + pragma Export (C, Unregister_Thread_Id, "__gnat_unregister_thread_id"); + -- Unregister the task associated with Thread from the GNAT run time and + -- destroy the memory allocated for its task id. + -- If no task id is associated with Thread, do nothing. + -- + -- C declaration: + -- + -- extern void __gnat_unregister_thread_id (pthread_t *thread); + procedure Destroy_Thread (Id : System.Address); pragma Export (C, Destroy_Thread, "__gnat_destroy_thread"); -- This procedure may be used to prematurely abort the created thread. @@ -90,4 +132,11 @@ package GNAT.Threads is -- -- extern void __gnat_get_thread (void *id, pthread_t *thread); + function To_Task_Id + (Id : System.Address) + return Ada.Task_Identification.Task_Id; + -- Ada interface only. + -- Given a low level Id, as returned by Create_Thread, return a Task_Id, + -- so that operations in Ada.Task_Identification can be used. + end GNAT.Threads; |