kolibrios/programs/develop/libraries/newlib/include/gthr.h
Sergey Semyonov (Serge) 2336060a0c newlib: update
git-svn-id: svn://kolibrios.org@1906 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-03-11 18:52:24 +00:00

104 lines
2.6 KiB
C

/* Threads compatibility routines for libgcc2. */
/* Compile this one with gcc. */
/* Copyright (C) 1997, 1998, 2004, 2008, 2009 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 3, 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_GTHR_H
#define GCC_GTHR_H
typedef unsigned int __gthread_key_t;
typedef struct {
volatile int done;
int started;
} __gthread_once_t;
typedef struct {
volatile int counter;
} __gthread_mutex_t;
void *tls_alloc(void);
static int __gthread_mutex_lock (__gthread_mutex_t *mutex)
{
__mutex_lock(&mutex->counter);
return 0;
};
static int __gthread_mutex_unlock (__gthread_mutex_t *mutex)
{
mutex->counter = 0;
return 0;
};
static inline int __gthread_key_create (__gthread_key_t *__key,
void (*__dtor) (void *) __attribute__((unused)))
{
int __status = 0;
void *__tls_index = tls_alloc();
if (__tls_index != NULL)
{
*__key = (unsigned int)__tls_index;
#ifdef MINGW32_SUPPORTS_MT_EH /* FIXME */
/* Mingw runtime will run the dtors in reverse order for each thread
when the thread exits. */
// __status = __mingwthr_key_dtor (*__key, __dtor);
#endif
}
else
__status = (int) ENOMEM;
return __status;
}
static inline void *
__gthread_getspecific (__gthread_key_t __key)
{
void *val;
__asm__ __volatile__(
"movl %%fs:(%1), %0"
:"=r"(val)
:"r"(__key));
return val;
};
static inline int
__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
{
if(!(__key & 3))
{
__asm__ __volatile__(
"movl %0, %%fs:(%1)"
::"r"(__ptr),"r"(__key));
return 0;
}
else return EINVAL;
}
#endif