480 lines
10 KiB
C
480 lines
10 KiB
C
/* Threads compatibility routines for libgcc2 and libobjc. */
|
|
/* Compile this one with gcc. */
|
|
/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC 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.
|
|
|
|
GCC 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 GCC; 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 other files,
|
|
some of which are compiled with GCC, to produce an executable,
|
|
this library 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 General Public License. */
|
|
|
|
#ifndef GCC_GTHR_SOLARIS_H
|
|
#define GCC_GTHR_SOLARIS_H
|
|
|
|
/* Solaris threads as found in Solaris 2.[456].
|
|
Actually these are Unix International (UI) threads, but I don't
|
|
know if anyone else implements these. */
|
|
|
|
#define __GTHREADS 1
|
|
|
|
#include <thread.h>
|
|
#include <errno.h>
|
|
|
|
typedef thread_key_t __gthread_key_t;
|
|
typedef struct
|
|
{
|
|
mutex_t mutex;
|
|
int once;
|
|
} __gthread_once_t;
|
|
typedef mutex_t __gthread_mutex_t;
|
|
|
|
#define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 }
|
|
#define __GTHREAD_MUTEX_INIT DEFAULTMUTEX
|
|
|
|
#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
|
|
|
|
#pragma weak thr_keycreate
|
|
#pragma weak thr_getspecific
|
|
#pragma weak thr_setspecific
|
|
#pragma weak thr_create
|
|
|
|
#pragma weak mutex_lock
|
|
#pragma weak mutex_trylock
|
|
#pragma weak mutex_unlock
|
|
|
|
#ifdef _LIBOBJC
|
|
#pragma weak thr_exit
|
|
#pragma weak thr_keycreate
|
|
#pragma weak thr_getprio
|
|
#pragma weak thr_self
|
|
#pragma weak thr_setprio
|
|
#pragma weak thr_yield
|
|
|
|
#pragma weak cond_init
|
|
#pragma weak cond_destroy
|
|
#pragma weak cond_wait
|
|
#pragma weak cond_broadcast
|
|
#pragma weak cond_signal
|
|
|
|
#pragma weak mutex_init
|
|
#pragma weak mutex_destroy
|
|
#endif
|
|
|
|
/* This will not actually work in Solaris 2.5, since libc contains
|
|
dummy symbols of all thr_* routines. */
|
|
|
|
static inline int
|
|
__gthread_active_p (void)
|
|
{
|
|
static void *const __gthread_active_ptr = (void *) &thr_create;
|
|
return __gthread_active_ptr != 0;
|
|
}
|
|
|
|
#else /* not SUPPORTS_WEAK */
|
|
|
|
static inline int
|
|
__gthread_active_p (void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#endif /* SUPPORTS_WEAK */
|
|
|
|
#ifdef _LIBOBJC
|
|
|
|
/* Key structure for maintaining thread specific storage */
|
|
static thread_key_t _objc_thread_storage;
|
|
|
|
/* Thread local storage for a single thread */
|
|
static void *thread_local_storage = NULL;
|
|
|
|
/* Backend initialization functions */
|
|
|
|
/* Initialize the threads subsystem. */
|
|
static inline int
|
|
__gthread_objc_init_thread_system(void)
|
|
{
|
|
/* Initialize the thread storage key */
|
|
if (__gthread_active_p ()
|
|
&& thr_keycreate(&_objc_thread_storage, NULL) == 0)
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Close the threads subsystem. */
|
|
static inline int
|
|
__gthread_objc_close_thread_system(void)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/* Backend thread functions */
|
|
|
|
/* Create a new thread of execution. */
|
|
static inline objc_thread_t
|
|
__gthread_objc_thread_detach(void (*func)(void *), void *arg)
|
|
{
|
|
objc_thread_t thread_id;
|
|
thread_t new_thread_id = 0;
|
|
|
|
if (!__gthread_active_p ())
|
|
return NULL;
|
|
|
|
if (thr_create(NULL, 0, (void *)func, arg,
|
|
THR_DETACHED | THR_NEW_LWP,
|
|
&new_thread_id) == 0)
|
|
thread_id = *(objc_thread_t *)&new_thread_id;
|
|
else
|
|
thread_id = NULL;
|
|
|
|
return thread_id;
|
|
}
|
|
|
|
/* Set the current thread's priority. */
|
|
static inline int
|
|
__gthread_objc_thread_set_priority(int priority)
|
|
{
|
|
int sys_priority = 0;
|
|
|
|
if (!__gthread_active_p ())
|
|
return -1;
|
|
|
|
switch (priority)
|
|
{
|
|
case OBJC_THREAD_INTERACTIVE_PRIORITY:
|
|
sys_priority = 300;
|
|
break;
|
|
default:
|
|
case OBJC_THREAD_BACKGROUND_PRIORITY:
|
|
sys_priority = 200;
|
|
break;
|
|
case OBJC_THREAD_LOW_PRIORITY:
|
|
sys_priority = 1000;
|
|
break;
|
|
}
|
|
|
|
/* Change priority */
|
|
if (thr_setprio(thr_self(), sys_priority) == 0)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/* Return the current thread's priority. */
|
|
static inline int
|
|
__gthread_objc_thread_get_priority(void)
|
|
{
|
|
int sys_priority;
|
|
|
|
if (!__gthread_active_p ())
|
|
return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
|
|
|
if (thr_getprio(thr_self(), &sys_priority) == 0)
|
|
{
|
|
if (sys_priority >= 250)
|
|
return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
|
else if (sys_priority >= 150)
|
|
return OBJC_THREAD_BACKGROUND_PRIORITY;
|
|
return OBJC_THREAD_LOW_PRIORITY;
|
|
}
|
|
|
|
/* Couldn't get priority. */
|
|
return -1;
|
|
}
|
|
|
|
/* Yield our process time to another thread. */
|
|
static inline void
|
|
__gthread_objc_thread_yield(void)
|
|
{
|
|
if (__gthread_active_p ())
|
|
thr_yield();
|
|
}
|
|
|
|
/* Terminate the current thread. */
|
|
static inline int
|
|
__gthread_objc_thread_exit(void)
|
|
{
|
|
if (__gthread_active_p ())
|
|
/* exit the thread */
|
|
thr_exit(&__objc_thread_exit_status);
|
|
|
|
/* Failed if we reached here */
|
|
return -1;
|
|
}
|
|
|
|
/* Returns an integer value which uniquely describes a thread. */
|
|
static inline objc_thread_t
|
|
__gthread_objc_thread_id(void)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return (objc_thread_t)thr_self();
|
|
else
|
|
return (objc_thread_t)1;
|
|
}
|
|
|
|
/* Sets the thread's local storage pointer. */
|
|
static inline int
|
|
__gthread_objc_thread_set_data(void *value)
|
|
{
|
|
if (__gthread_active_p ())
|
|
{
|
|
if (thr_setspecific(_objc_thread_storage, value) == 0)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
thread_local_storage = value;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Returns the thread's local storage pointer. */
|
|
static inline void *
|
|
__gthread_objc_thread_get_data(void)
|
|
{
|
|
void *value = NULL;
|
|
|
|
if (__gthread_active_p ())
|
|
{
|
|
if (thr_getspecific(_objc_thread_storage, &value) == 0)
|
|
return value;
|
|
else
|
|
return NULL;
|
|
}
|
|
else
|
|
return thread_local_storage;
|
|
}
|
|
|
|
/* Backend mutex functions */
|
|
|
|
/* Allocate a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_allocate(objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ()
|
|
&& mutex_init( (mutex_t *)(&(mutex->backend)), USYNC_THREAD, 0))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Deallocate a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ())
|
|
mutex_destroy((mutex_t *)(&(mutex->backend)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Grab a lock on a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_lock(objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ()
|
|
&& mutex_lock((mutex_t *)(&(mutex->backend))) != 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Try to grab a lock on a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_trylock(objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ()
|
|
&& mutex_trylock((mutex_t *)(&(mutex->backend))) != 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Unlock the mutex */
|
|
static inline int
|
|
__gthread_objc_mutex_unlock(objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ()
|
|
&& mutex_unlock((mutex_t *)(&(mutex->backend))) != 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Backend condition mutex functions */
|
|
|
|
/* Allocate a condition. */
|
|
static inline int
|
|
__gthread_objc_condition_allocate(objc_condition_t condition)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return cond_init((cond_t *)(&(condition->backend)), USYNC_THREAD,
|
|
NULL);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Deallocate a condition. */
|
|
static inline int
|
|
__gthread_objc_condition_deallocate(objc_condition_t condition)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return cond_destroy((cond_t *)(&(condition->backend)));
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Wait on the condition */
|
|
static inline int
|
|
__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return cond_wait((cond_t *)(&(condition->backend)),
|
|
(mutex_t *)(&(mutex->backend)));
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Wake up all threads waiting on this condition. */
|
|
static inline int
|
|
__gthread_objc_condition_broadcast(objc_condition_t condition)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return cond_broadcast((cond_t *)(&(condition->backend)));
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Wake up one thread waiting on this condition. */
|
|
static inline int
|
|
__gthread_objc_condition_signal(objc_condition_t condition)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return cond_signal((cond_t *)(&(condition->backend)));
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#else /* _LIBOBJC */
|
|
|
|
static inline int
|
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
|
{
|
|
if (! __gthread_active_p ())
|
|
return -1;
|
|
|
|
if (once == 0 || func == 0)
|
|
return EINVAL;
|
|
|
|
if (once->once == 0)
|
|
{
|
|
int status = mutex_lock (&once->mutex);
|
|
if (status != 0)
|
|
return status;
|
|
if (once->once == 0)
|
|
{
|
|
(*func) ();
|
|
once->once ++;
|
|
}
|
|
mutex_unlock (&once->mutex);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
|
{
|
|
/* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually
|
|
got a reasonable key value, and if not, fail. */
|
|
*key = -1;
|
|
if (thr_keycreate (key, dtor) != 0 || *key == -1)
|
|
return -1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_dtor (__gthread_key_t key, void *ptr)
|
|
{
|
|
/* Nothing needed. */
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_delete (__gthread_key_t key)
|
|
{
|
|
/* Not possible. */
|
|
return -1;
|
|
}
|
|
|
|
static inline void *
|
|
__gthread_getspecific (__gthread_key_t key)
|
|
{
|
|
void *ptr;
|
|
if (thr_getspecific (key, &ptr) == 0)
|
|
return ptr;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
|
{
|
|
return thr_setspecific (key, (void *) ptr);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return mutex_lock (mutex);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return mutex_trylock (mutex);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (__gthread_active_p ())
|
|
return mutex_unlock (mutex);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#endif /* _LIBOBJC */
|
|
|
|
#endif /* ! GCC_GTHR_SOLARIS_H */
|