/* Threads compatibility routines for libgcc2 and libobjc. */
/* Compile this one with gcc. */
-/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008, 2009, 2010, 2011 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
+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
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. */
+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.
-/* 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. */
+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_POSIX_H
#define GCC_GTHR_POSIX_H
#endif
#include <pthread.h>
-#include <unistd.h>
+
+#if ((defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)) \
+ || !defined(_GTHREAD_USE_MUTEX_TIMEDLOCK))
+# include <unistd.h>
+# if defined(_POSIX_TIMEOUTS) && _POSIX_TIMEOUTS >= 0
+# define _GTHREAD_USE_MUTEX_TIMEDLOCK 1
+# else
+# define _GTHREAD_USE_MUTEX_TIMEDLOCK 0
+# endif
+#endif
typedef pthread_t __gthread_t;
typedef pthread_key_t __gthread_key_t;
/* POSIX like conditional variables are supported. Please look at comments
in gthr.h for details. */
-#define __GTHREAD_HAS_COND 1
+#define __GTHREAD_HAS_COND 1
#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
__gthrw3(pthread_mutex_lock)
__gthrw3(pthread_mutex_trylock)
-#ifdef _POSIX_TIMEOUTS
+#if _GTHREAD_USE_MUTEX_TIMEDLOCK
__gthrw3(pthread_mutex_timedlock)
-#endif /* _POSIX_TIMEOUTS */
+#endif
__gthrw3(pthread_mutex_unlock)
__gthrw3(pthread_mutex_init)
__gthrw3(pthread_mutex_destroy)
__gthrw(pthread_equal)
__gthrw(pthread_self)
__gthrw(pthread_detach)
+#ifndef __BIONIC__
__gthrw(pthread_cancel)
+#endif
__gthrw(sched_yield)
__gthrw(pthread_mutex_lock)
__gthrw(pthread_mutex_trylock)
-#ifdef _POSIX_TIMEOUTS
+#if _GTHREAD_USE_MUTEX_TIMEDLOCK
__gthrw(pthread_mutex_timedlock)
-#endif /* _POSIX_TIMEOUTS */
+#endif
__gthrw(pthread_mutex_unlock)
__gthrw(pthread_mutex_init)
__gthrw(pthread_mutex_destroy)
static inline int
__gthread_active_p (void)
{
- static void *const __gthread_active_ptr
+/* Android's C library does not provide pthread_cancel, check for
+ `pthread_create' instead. */
+#ifndef __BIONIC__
+ static void *const __gthread_active_ptr
= __extension__ (void *) &__gthrw_(pthread_cancel);
+#else
+ static void *const __gthread_active_ptr
+ = __extension__ (void *) &__gthrw_(pthread_create);
+#endif
return __gthread_active_ptr != 0;
}
calls in shared flavors of the HP-UX C library. Most of the stubs
have no functionality. The details are described in the "libc cumulative
patch" for each subversion of HP-UX 11. There are two special interfaces
- provided for checking whether an application is linked to a pthread
+ provided for checking whether an application is linked to a shared pthread
library or not. However, these interfaces aren't available in early
- libc versions. We also can't use pthread_once as some libc versions
- call the init function. So, we use pthread_create to check whether it
- is possible to create a thread or not. The stub implementation returns
- the error number ENOSYS. */
+ libpthread libraries. We also need a test that works for archive
+ libraries. We can't use pthread_once as some libc versions call the
+ init function. We also can't use pthread_create or pthread_attr_init
+ as these create a thread and thereby prevent changing the default stack
+ size. The function pthread_default_stacksize_np is available in both
+ the archive and shared versions of libpthread. It can be used to
+ determine the default pthread stack size. There is a stub in some
+ shared libc versions which returns a zero size if pthreads are not
+ active. We provide an equivalent stub to handle cases where libc
+ doesn't provide one. */
#if defined(__hppa__) && defined(__hpux__)
-#include <errno.h>
-
static volatile int __gthread_active = -1;
-static void *
-__gthread_start (void *arg __attribute__((unused)))
-{
- return NULL;
-}
-
-static void __gthread_active_init (void) __attribute__((noinline));
-static void
-__gthread_active_init (void)
-{
- static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
- pthread_t t;
- pthread_attr_t a;
- int result;
-
- __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
- if (__gthread_active < 0)
- {
- __gthrw_(pthread_attr_init) (&a);
- __gthrw_(pthread_attr_setdetachstate) (&a, PTHREAD_CREATE_DETACHED);
- result = __gthrw_(pthread_create) (&t, &a, __gthread_start, NULL);
- if (result != ENOSYS)
- __gthread_active = 1;
- else
- __gthread_active = 0;
- __gthrw_(pthread_attr_destroy) (&a);
- }
- __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
-}
-
static inline int
__gthread_active_p (void)
{
/* Avoid reading __gthread_active twice on the main code path. */
int __gthread_active_latest_value = __gthread_active;
+ size_t __s;
- /* This test is not protected to avoid taking a lock on the main code
- path so every update of __gthread_active in a threaded program must
- be atomic with regard to the result of the test. */
if (__builtin_expect (__gthread_active_latest_value < 0, 0))
{
- __gthread_active_init ();
+ pthread_default_stacksize_np (0, &__s);
+ __gthread_active = __s ? 1 : 0;
__gthread_active_latest_value = __gthread_active;
}
if (!__gthread_active_p ())
return NULL;
- if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
+ if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs,
+ (void *) func, arg)))
thread_id = (objc_thread_t) new_thread_handle;
else
thread_id = NULL;
#else /* _LIBOBJC */
static inline int
-__gthread_create (__gthread_t *thread, void *(*func) (void*), void *args)
+__gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
+ void *__args)
{
- return __gthrw_(pthread_create) (thread, NULL, func, args);
+ return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
}
static inline int
-__gthread_join (__gthread_t thread, void **value_ptr)
+__gthread_join (__gthread_t __threadid, void **__value_ptr)
{
- return __gthrw_(pthread_join) (thread, value_ptr);
+ return __gthrw_(pthread_join) (__threadid, __value_ptr);
}
static inline int
-__gthread_detach (__gthread_t thread)
+__gthread_detach (__gthread_t __threadid)
{
- return __gthrw_(pthread_detach) (thread);
+ return __gthrw_(pthread_detach) (__threadid);
}
static inline int
-__gthread_equal (__gthread_t t1, __gthread_t t2)
+__gthread_equal (__gthread_t __t1, __gthread_t __t2)
{
- return __gthrw_(pthread_equal) (t1, t2);
+ return __gthrw_(pthread_equal) (__t1, __t2);
}
static inline __gthread_t
}
static inline int
-__gthread_once (__gthread_once_t *once, void (*func) (void))
+__gthread_once (__gthread_once_t *__once, void (*__func) (void))
{
if (__gthread_active_p ())
- return __gthrw_(pthread_once) (once, func);
+ return __gthrw_(pthread_once) (__once, __func);
else
return -1;
}
static inline int
-__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
+__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
{
- return __gthrw_(pthread_key_create) (key, dtor);
+ return __gthrw_(pthread_key_create) (__key, __dtor);
}
static inline int
-__gthread_key_delete (__gthread_key_t key)
+__gthread_key_delete (__gthread_key_t __key)
{
- return __gthrw_(pthread_key_delete) (key);
+ return __gthrw_(pthread_key_delete) (__key);
}
static inline void *
-__gthread_getspecific (__gthread_key_t key)
+__gthread_getspecific (__gthread_key_t __key)
{
- return __gthrw_(pthread_getspecific) (key);
+ return __gthrw_(pthread_getspecific) (__key);
}
static inline int
-__gthread_setspecific (__gthread_key_t key, const void *ptr)
+__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
{
- return __gthrw_(pthread_setspecific) (key, ptr);
+ return __gthrw_(pthread_setspecific) (__key, __ptr);
}
static inline int
-__gthread_mutex_destroy (__gthread_mutex_t *mutex)
+__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
{
if (__gthread_active_p ())
- return __gthrw_(pthread_mutex_destroy) (mutex);
+ return __gthrw_(pthread_mutex_destroy) (__mutex);
else
return 0;
}
static inline int
-__gthread_mutex_lock (__gthread_mutex_t *mutex)
+__gthread_mutex_lock (__gthread_mutex_t *__mutex)
{
if (__gthread_active_p ())
- return __gthrw_(pthread_mutex_lock) (mutex);
+ return __gthrw_(pthread_mutex_lock) (__mutex);
else
return 0;
}
static inline int
-__gthread_mutex_trylock (__gthread_mutex_t *mutex)
+__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
{
if (__gthread_active_p ())
- return __gthrw_(pthread_mutex_trylock) (mutex);
+ return __gthrw_(pthread_mutex_trylock) (__mutex);
else
return 0;
}
-#ifdef _POSIX_TIMEOUTS
+#if _GTHREAD_USE_MUTEX_TIMEDLOCK
static inline int
-__gthread_mutex_timedlock (__gthread_mutex_t *mutex,
- const __gthread_time_t *abs_timeout)
+__gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
{
if (__gthread_active_p ())
- return __gthrw_(pthread_mutex_timedlock) (mutex, abs_timeout);
+ return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
else
return 0;
}
#endif
static inline int
-__gthread_mutex_unlock (__gthread_mutex_t *mutex)
+__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
{
if (__gthread_active_p ())
- return __gthrw_(pthread_mutex_unlock) (mutex);
+ return __gthrw_(pthread_mutex_unlock) (__mutex);
else
return 0;
}
#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
static inline int
-__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
+__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
{
if (__gthread_active_p ())
{
- pthread_mutexattr_t attr;
- int r;
-
- r = __gthrw_(pthread_mutexattr_init) (&attr);
- if (!r)
- r = __gthrw_(pthread_mutexattr_settype) (&attr, PTHREAD_MUTEX_RECURSIVE);
- if (!r)
- r = __gthrw_(pthread_mutex_init) (mutex, &attr);
- if (!r)
- r = __gthrw_(pthread_mutexattr_destroy) (&attr);
- return r;
+ pthread_mutexattr_t __attr;
+ int __r;
+
+ __r = __gthrw_(pthread_mutexattr_init) (&__attr);
+ if (!__r)
+ __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
+ PTHREAD_MUTEX_RECURSIVE);
+ if (!__r)
+ __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
+ if (!__r)
+ __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
+ return __r;
}
return 0;
}
#endif
static inline int
-__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
{
- return __gthread_mutex_lock (mutex);
+ return __gthread_mutex_lock (__mutex);
}
static inline int
-__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
{
- return __gthread_mutex_trylock (mutex);
+ return __gthread_mutex_trylock (__mutex);
}
-#ifdef _POSIX_TIMEOUTS
+#if _GTHREAD_USE_MUTEX_TIMEDLOCK
static inline int
-__gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *mutex,
- const __gthread_time_t *abs_timeout)
+__gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
{
- return __gthread_mutex_timedlock (mutex, abs_timeout);
+ return __gthread_mutex_timedlock (__mutex, __abs_timeout);
}
#endif
static inline int
-__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
{
- return __gthread_mutex_unlock (mutex);
+ return __gthread_mutex_unlock (__mutex);
}
static inline int
-__gthread_cond_broadcast (__gthread_cond_t *cond)
+__gthread_cond_broadcast (__gthread_cond_t *__cond)
{
- return __gthrw_(pthread_cond_broadcast) (cond);
+ return __gthrw_(pthread_cond_broadcast) (__cond);
}
static inline int
-__gthread_cond_signal (__gthread_cond_t *cond)
+__gthread_cond_signal (__gthread_cond_t *__cond)
{
- return __gthrw_(pthread_cond_signal) (cond);
+ return __gthrw_(pthread_cond_signal) (__cond);
}
static inline int
-__gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex)
+__gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
{
- return __gthrw_(pthread_cond_wait) (cond, mutex);
+ return __gthrw_(pthread_cond_wait) (__cond, __mutex);
}
static inline int
-__gthread_cond_timedwait (__gthread_cond_t *cond, __gthread_mutex_t *mutex,
- const __gthread_time_t *abs_timeout)
+__gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
{
- return __gthrw_(pthread_cond_timedwait) (cond, mutex, abs_timeout);
+ return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
}
static inline int
-__gthread_cond_wait_recursive (__gthread_cond_t *cond,
- __gthread_recursive_mutex_t *mutex)
+__gthread_cond_wait_recursive (__gthread_cond_t *__cond,
+ __gthread_recursive_mutex_t *__mutex)
{
- return __gthread_cond_wait (cond, mutex);
+ return __gthread_cond_wait (__cond, __mutex);
}
static inline int
-__gthread_cond_timedwait_recursive (__gthread_cond_t *cond,
- __gthread_recursive_mutex_t *mutex,
- const __gthread_time_t *abs_timeout)
+__gthread_cond_timedwait_recursive (__gthread_cond_t *__cond,
+ __gthread_recursive_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
{
- return __gthread_cond_timedwait (cond, mutex, abs_timeout);
+ return __gthread_cond_timedwait (__cond, __mutex, __abs_timeout);
}
static inline int
-__gthread_cond_destroy (__gthread_cond_t* cond)
+__gthread_cond_destroy (__gthread_cond_t* __cond)
{
- return __gthrw_(pthread_cond_destroy) (cond);
+ return __gthrw_(pthread_cond_destroy) (__cond);
}
#endif /* _LIBOBJC */
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