104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/* Threads compatibility routines for libgcc2. */
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/* Compile this one with gcc. */
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/* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GTHR_H
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#define GCC_GTHR_H
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typedef unsigned int __gthread_key_t;
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typedef struct {
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volatile int done;
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int started;
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} __gthread_once_t;
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typedef struct {
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volatile int counter;
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} __gthread_mutex_t;
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void *tls_alloc(void);
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static int __gthread_mutex_lock (__gthread_mutex_t *mutex)
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{
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__mutex_lock(&mutex->counter);
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return 0;
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};
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static int __gthread_mutex_unlock (__gthread_mutex_t *mutex)
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{
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mutex->counter = 0;
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return 0;
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};
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static inline int __gthread_key_create (__gthread_key_t *__key,
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void (*__dtor) (void *) __attribute__((unused)))
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{
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int __status = 0;
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void *__tls_index = tls_alloc();
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if (__tls_index != NULL)
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{
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*__key = (unsigned int)__tls_index;
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#ifdef MINGW32_SUPPORTS_MT_EH /* FIXME */
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/* Mingw runtime will run the dtors in reverse order for each thread
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when the thread exits. */
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// __status = __mingwthr_key_dtor (*__key, __dtor);
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#endif
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}
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else
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__status = (int) ENOMEM;
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return __status;
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}
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static inline void *
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__gthread_getspecific (__gthread_key_t __key)
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{
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void *val;
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__asm__ __volatile__(
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"movl %%fs:(%1), %0"
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:"=r"(val)
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:"r"(__key));
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return val;
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};
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static inline int
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__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
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{
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if(!(__key & 3))
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{
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__asm__ __volatile__(
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"movl %0, %%fs:(%1)"
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::"r"(__ptr),"r"(__key));
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return 0;
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}
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else return EINVAL;
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}
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#endif
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