thr-irix.c
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上传日期:2013-05-12
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- /* GNU Objective C Runtime Thread Interface - SGI IRIX Implementation
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
- Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
- This file is part of GNU CC.
- GNU CC is free software; you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the Free Software
- Foundation; either version 2, or (at your option) any later version.
- GNU CC is distributed in the hope that it will be useful, but WITHOUT 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 along with
- GNU CC; see the 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 you link this library with files compiled with
- GCC to produce an executable, this does not 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 General Public License. */
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/sysmp.h>
- #include <sys/prctl.h>
- #include <ulocks.h>
- #include <objc/thr.h>
- #include "runtime.h"
- /* Key structure for maintaining thread specific storage */
- static void * __objc_shared_arena_handle = NULL;
- /* Backend initialization functions */
- /* Initialize the threads subsystem. */
- int
- __objc_init_thread_system(void)
- {
- /* Name of IRIX arena. */
- char arena_name[64];
- DEBUG_PRINTF("__objc_init_thread_systemn");
- /* Construct a temporary name for arena. */
- sprintf(arena_name, "/usr/tmp/objc_%05u", (unsigned)getpid());
- /* Up to 256 threads. Arena only for threads. */
- usconfig(CONF_INITUSERS, 256);
- usconfig(CONF_ARENATYPE, US_SHAREDONLY);
- /* Initialize the arena */
- if (!(__objc_shared_arena_handle = usinit(arena_name)))
- /* Failed */
- return -1;
- return 0;
- }
- /* Close the threads subsystem. */
- int
- __objc_close_thread_system(void)
- {
- return 0;
- }
- /* Backend thread functions */
- /* Create a new thread of execution. */
- objc_thread_t
- __objc_thread_detach(void (*func)(void *arg), void *arg)
- {
- objc_thread_t thread_id;
- int sys_id;
- if ((sys_id = sproc((void *)func, PR_SALL, arg)) >= 0)
- thread_id = (objc_thread_t)sys_id;
- else
- thread_id = NULL;
-
- return thread_id;
- }
- /* Set the current thread's priority. */
- int
- __objc_thread_set_priority(int priority)
- {
- /* Not implemented yet */
- return -1;
- }
- /* Return the current thread's priority. */
- int
- __objc_thread_get_priority(void)
- {
- /* Not implemented yet */
- return OBJC_THREAD_INTERACTIVE_PRIORITY;
- }
- /* Yield our process time to another thread. */
- void
- __objc_thread_yield(void)
- {
- sginap(0);
- }
- /* Terminate the current thread. */
- int
- __objc_thread_exit(void)
- {
- /* IRIX only has exit. */
- exit(__objc_thread_exit_status);
- /* Failed if we reached here */
- return -1;
- }
- /* Returns an integer value which uniquely describes a thread. */
- objc_thread_t
- __objc_thread_id(void)
- {
- /* Threads are processes. */
- return (objc_thread_t)get_pid();
- }
- /* Sets the thread's local storage pointer. */
- int
- __objc_thread_set_data(void *value)
- {
- *((void **)&PRDA->usr_prda) = value;
- return 0;
- }
- /* Returns the thread's local storage pointer. */
- void *
- __objc_thread_get_data(void)
- {
- return *((void **)&PRDA->usr_prda);
- }
- /* Backend mutex functions */
- /* Allocate a mutex. */
- int
- __objc_mutex_allocate(objc_mutex_t mutex)
- {
- if (!( (ulock_t)(mutex->backend) = usnewlock(__objc_shared_arena_handle) ))
- return -1;
- else
- return 0;
- }
- /* Deallocate a mutex. */
- int
- __objc_mutex_deallocate(objc_mutex_t mutex)
- {
- usfreelock((ulock_t)(mutex->backend), __objc_shared_arena_handle);
- return 0;
- }
- /* Grab a lock on a mutex. */
- int
- __objc_mutex_lock(objc_mutex_t mutex)
- {
- if (ussetlock((ulock_t)(mutex->backend)) == 0)
- return -1;
- else
- return 0;
- }
- /* Try to grab a lock on a mutex. */
- int
- __objc_mutex_trylock(objc_mutex_t mutex)
- {
- if (ustestlock((ulock_t)(mutex->backend)) == 0)
- return -1;
- else
- return 0;
- }
- /* Unlock the mutex */
- int
- __objc_mutex_unlock(objc_mutex_t mutex)
- {
- usunsetlock((ulock_t)(mutex->backend));
- return 0;
- }
- /* Backend condition mutex functions */
- /* Allocate a condition. */
- int
- __objc_condition_allocate(objc_condition_t condition)
- {
- /* Unimplemented. */
- return -1;
- }
- /* Deallocate a condition. */
- int
- __objc_condition_deallocate(objc_condition_t condition)
- {
- /* Unimplemented. */
- return -1;
- }
- /* Wait on the condition */
- int
- __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
- {
- /* Unimplemented. */
- return -1;
- }
- /* Wake up all threads waiting on this condition. */
- int
- __objc_condition_broadcast(objc_condition_t condition)
- {
- /* Unimplemented. */
- return -1;
- }
- /* Wake up one thread waiting on this condition. */
- int
- __objc_condition_signal(objc_condition_t condition)
- {
- /* Unimplemented. */
- return -1;
- }
- /* End of File */