mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
395 lines
9.0 KiB
C
395 lines
9.0 KiB
C
/* Threads compatibility routines for libgcc2 and libobjc. */
|
|
/* Compile this one with gcc. */
|
|
/* Copyright (C) 2002, 2003, 2004 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, 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301, 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_NKS_H
|
|
#define GCC_GTHR_NKS_H
|
|
|
|
/* NKS threads specific definitions.
|
|
Easy, since the interface is mostly one-to-one mapping. */
|
|
|
|
#define __GTHREADS 1
|
|
|
|
#define NKS_NO_INLINE_FUNCS
|
|
#include <nksapi.h>
|
|
#include <string.h>
|
|
|
|
typedef NXKey_t __gthread_key_t;
|
|
typedef NXMutex_t *__gthread_mutex_t;
|
|
typedef NXMutex_t *__gthread_recursive_mutex_t;
|
|
|
|
#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
|
|
#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
|
|
|
|
static inline int
|
|
__gthread_active_p (void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#ifdef _LIBOBJC
|
|
|
|
/* This is the config.h file in libobjc/ */
|
|
#include <config.h>
|
|
|
|
#ifdef HAVE_SCHED_H
|
|
# include <sched.h>
|
|
#endif
|
|
|
|
/* Key structure for maintaining thread specific storage */
|
|
static NXKey_t _objc_thread_storage;
|
|
|
|
/* Backend initialization functions */
|
|
|
|
/* Initialize the threads subsystem. */
|
|
static inline int
|
|
__gthread_objc_init_thread_system (void)
|
|
{
|
|
/* Initialize the thread storage key. */
|
|
if (NXKeyCreate (NULL, NULL, &_objc_thread_storage) == 0)
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
/* Close the threads subsystem. */
|
|
static inline int
|
|
__gthread_objc_close_thread_system (void)
|
|
{
|
|
if (NXKeyDelete (_objc_thread_storage) == 0)
|
|
return 0;
|
|
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;
|
|
NXContext_t context;
|
|
NXThreadId_t new_thread_handle;
|
|
int err;
|
|
|
|
if ((context = NXContextAlloc (func, arg, NX_PRIO_MED, 0, 0, 0, &err)) == NULL)
|
|
thread_id = NULL;
|
|
else if (NXThreadCreate (context, NX_THR_DETACHED, &new_thread_handle) == 0)
|
|
thread_id = (objc_thread_t) new_thread_handle;
|
|
else {
|
|
NXContextFree (context);
|
|
thread_id = NULL;
|
|
}
|
|
|
|
return thread_id;
|
|
}
|
|
|
|
/* Set the current thread's priority. */
|
|
static inline int
|
|
__gthread_objc_thread_set_priority (int priority)
|
|
{
|
|
if (NXThreadSetPriority (NXThreadGetId (), priority) == 0)
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
/* Return the current thread's priority. */
|
|
static inline int
|
|
__gthread_objc_thread_get_priority (void)
|
|
{
|
|
int priority;
|
|
|
|
if (NXThreadGetPriority (NXThreadGetId (), &priority) == 0)
|
|
return priority;
|
|
return -1;
|
|
}
|
|
|
|
/* Yield our process time to another thread. */
|
|
static inline void
|
|
__gthread_objc_thread_yield (void)
|
|
{
|
|
NXThreadYield ();
|
|
}
|
|
|
|
/* Terminate the current thread. */
|
|
static inline int
|
|
__gthread_objc_thread_exit (void)
|
|
{
|
|
/* exit the thread */
|
|
NXThreadExit (&__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)
|
|
{
|
|
(objc_thread_t) NXThreadGetId ();
|
|
}
|
|
|
|
/* Sets the thread's local storage pointer. */
|
|
static inline int
|
|
__gthread_objc_thread_set_data (void *value)
|
|
{
|
|
return NXKeySetValue (_objc_thread_storage, value);
|
|
}
|
|
|
|
/* Returns the thread's local storage pointer. */
|
|
static inline void *
|
|
__gthread_objc_thread_get_data (void)
|
|
{
|
|
void *value;
|
|
|
|
if (NXKeyGetValue (_objc_thread_storage, &value) == 0)
|
|
return value;
|
|
return NULL;
|
|
}
|
|
|
|
/* Backend mutex functions */
|
|
|
|
/* Allocate a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_allocate (objc_mutex_t mutex)
|
|
{
|
|
static const NX_LOCK_INFO_ALLOC (info, "GNU ObjC", 0);
|
|
|
|
if ((mutex->backend = NXMutexAlloc (0, 0, &info)) == NULL)
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
/* Deallocate a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
|
|
{
|
|
while (NXMutexIsOwned ((NXMutex_t *)mutex->backend))
|
|
NXUnlock ((NXMutex_t *)mutex->backend);
|
|
if (NXMutexFree ((NXMutex_t *)mutex->backend) != 0)
|
|
return -1;
|
|
mutex->backend = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* Grab a lock on a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_lock (objc_mutex_t mutex)
|
|
{
|
|
return NXLock ((NXMutex_t *)mutex->backend);
|
|
}
|
|
|
|
/* Try to grab a lock on a mutex. */
|
|
static inline int
|
|
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
|
|
{
|
|
if (!NXTryLock ((NXMutex_t *)mutex->backend))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/* Unlock the mutex */
|
|
static inline int
|
|
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
|
|
{
|
|
return NXUnlock ((NXMutex_t *)mutex->backend);
|
|
}
|
|
|
|
/* Backend condition mutex functions */
|
|
|
|
/* Allocate a condition. */
|
|
static inline int
|
|
__gthread_objc_condition_allocate (objc_condition_t condition)
|
|
{
|
|
condition->backend = NXCondAlloc (NULL);
|
|
if (condition->backend == NULL)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Deallocate a condition. */
|
|
static inline int
|
|
__gthread_objc_condition_deallocate (objc_condition_t condition)
|
|
{
|
|
if (NXCondFree ((NXCond_t *)condition->backend) != 0)
|
|
return -1;
|
|
condition->backend = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* Wait on the condition */
|
|
static inline int
|
|
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
|
|
{
|
|
return NXCondWait ((NXCond_t *)condition->backend, (NXMutex_t *)mutex->backend);
|
|
}
|
|
|
|
/* Wake up all threads waiting on this condition. */
|
|
static inline int
|
|
__gthread_objc_condition_broadcast (objc_condition_t condition)
|
|
{
|
|
return NXCondBroadcast ((NXCond_t *)condition->backend);
|
|
}
|
|
|
|
/* Wake up one thread waiting on this condition. */
|
|
static inline int
|
|
__gthread_objc_condition_signal (objc_condition_t condition)
|
|
{
|
|
return NXCondSignal ((NXCond_t *)condition->backend);
|
|
}
|
|
|
|
#else /* _LIBOBJC */
|
|
|
|
#if defined(__cplusplus)
|
|
# include <bits/atomicity.h>
|
|
/* The remaining conditions here are temporary until there is
|
|
an application accessible atomic operations API set... */
|
|
#elif defined(_M_IA64) || defined(__ia64__)
|
|
# include <../libstdc++-v3/config/cpu/ia64/bits/atomicity.h>
|
|
#elif defined(_M_IX86) || defined(__i486__)
|
|
# include <../libstdc++-v3/config/cpu/i486/bits/atomicity.h>
|
|
#elif defined(_M_AMD64) || defined(__x86_64__)
|
|
# include <../libstdc++-v3/config/cpu/x86-64/bits/atomicity.h>
|
|
#endif
|
|
|
|
typedef volatile long __gthread_once_t;
|
|
|
|
#define __GTHREAD_ONCE_INIT 0
|
|
|
|
static inline int
|
|
__gthread_once (__gthread_once_t *once, void (*func) (void))
|
|
{
|
|
if (__compare_and_swap (once, 0, 1))
|
|
{
|
|
func();
|
|
*once |= 2;
|
|
}
|
|
else
|
|
{
|
|
while (!(*once & 2))
|
|
NXThreadYield ();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
|
|
{
|
|
return NXKeyCreate (dtor, NULL, key);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_dtor (__gthread_key_t key, void *ptr)
|
|
{
|
|
/* Just reset the key value to zero. */
|
|
if (ptr)
|
|
return NXKeySetValue (key, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_key_delete (__gthread_key_t key)
|
|
{
|
|
return NXKeyDelete (key);
|
|
}
|
|
|
|
static inline void *
|
|
__gthread_getspecific (__gthread_key_t key)
|
|
{
|
|
void *value;
|
|
|
|
if (NXKeyGetValue (key, &value) == 0)
|
|
return value;
|
|
return NULL;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_setspecific (__gthread_key_t key, const void *ptr)
|
|
{
|
|
return NXKeySetValue (key, (void *)ptr);
|
|
}
|
|
|
|
static inline void
|
|
__gthread_mutex_init_function (__gthread_mutex_t *mutex)
|
|
{
|
|
static const NX_LOCK_INFO_ALLOC (info, "GTHREADS", 0);
|
|
|
|
*mutex = NXMutexAlloc (0, 0, &info);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_lock (__gthread_mutex_t *mutex)
|
|
{
|
|
return NXLock (*mutex);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
|
|
{
|
|
if (NXTryLock (*mutex))
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
|
|
{
|
|
return NXUnlock (*mutex);
|
|
}
|
|
|
|
static inline void
|
|
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
|
|
{
|
|
static const NX_LOCK_INFO_ALLOC (info, "GTHREADS", 0);
|
|
|
|
*mutex = NXMutexAlloc (NX_MUTEX_RECURSIVE, 0, &info);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
|
|
{
|
|
return NXLock (*mutex);
|
|
}
|
|
|
|
static inline int
|
|
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
|
|
{
|
|
if (NXTryLock (*mutex))
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
static inline int
|
|
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
|
|
{
|
|
return NXUnlock (*mutex);
|
|
}
|
|
|
|
#endif /* _LIBOBJC */
|
|
|
|
#endif /* not GCC_GTHR_NKS_H */
|