/* Threads compatibility routines for libgcc2 and libobjc. */
/* Compile this one with gcc. */
-/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004
+/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GCC.
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. */
+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,
#define __GTHREADS 1
/* Some implementations of <pthread.h> require this to be defined. */
-#ifndef _REENTRANT
+#if !defined(_REENTRANT) && defined(__osf__)
#define _REENTRANT 1
#endif
typedef pthread_once_t __gthread_once_t;
typedef pthread_mutex_t __gthread_mutex_t;
typedef pthread_mutex_t __gthread_recursive_mutex_t;
+typedef pthread_cond_t __gthread_cond_t;
+
+/* POSIX like conditional variables are supported. Please look at comments
+ in gthr.h for details. */
+#define __GTHREAD_HAS_COND 1
#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
-#elif defined(PTHREAD_MUTEX_RECURSIVE)
-#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
#else
-#define __GTHREAD_RECURSIVE_MUTEX_INIT RECURSIVE_ERRORCHECKMUTEX
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
#endif
+#define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# ifndef __gthrw_pragma
+# define __gthrw_pragma(pragma)
+# endif
+# define __gthrw2(name,name2,type) \
+ static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
+ __gthrw_pragma(weak type)
+# define __gthrw_(name) __gthrw_ ## name
+#else
+# define __gthrw2(name,name2,type)
+# define __gthrw_(name) name
+#endif
-#pragma weak pthread_once
-#pragma weak pthread_key_create
-#pragma weak pthread_key_delete
-#pragma weak pthread_getspecific
-#pragma weak pthread_setspecific
-#pragma weak pthread_create
+/* Typically, __gthrw_foo is a weak reference to symbol foo. */
+#define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
+
+/* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
+ map a subset of the POSIX pthread API to mangled versions of their
+ names. */
+#if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
+#define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
+__gthrw3(pthread_once)
+__gthrw3(pthread_getspecific)
+__gthrw3(pthread_setspecific)
+__gthrw3(pthread_create)
+__gthrw3(pthread_cancel)
+__gthrw3(pthread_mutex_lock)
+__gthrw3(pthread_mutex_trylock)
+__gthrw3(pthread_mutex_unlock)
+__gthrw3(pthread_mutex_init)
+__gthrw3(pthread_mutex_destroy)
+__gthrw3(pthread_cond_broadcast)
+__gthrw3(pthread_cond_wait)
+#else
+__gthrw(pthread_once)
+__gthrw(pthread_getspecific)
+__gthrw(pthread_setspecific)
+__gthrw(pthread_create)
+__gthrw(pthread_cancel)
+__gthrw(pthread_mutex_lock)
+__gthrw(pthread_mutex_trylock)
+__gthrw(pthread_mutex_unlock)
+__gthrw(pthread_mutex_init)
+__gthrw(pthread_mutex_destroy)
+__gthrw(pthread_cond_broadcast)
+__gthrw(pthread_cond_wait)
+#endif
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
-#pragma weak pthread_mutexattr_init
-#pragma weak pthread_mutexattr_settype
-#pragma weak pthread_mutexattr_destroy
+__gthrw(pthread_key_create)
+__gthrw(pthread_key_delete)
+__gthrw(pthread_mutexattr_init)
+__gthrw(pthread_mutexattr_settype)
+__gthrw(pthread_mutexattr_destroy)
-#pragma weak pthread_mutex_init
#if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
/* Objective-C. */
-#pragma weak pthread_cond_broadcast
-#pragma weak pthread_cond_destroy
-#pragma weak pthread_cond_init
-#pragma weak pthread_cond_signal
-#pragma weak pthread_cond_wait
-#pragma weak pthread_exit
-#pragma weak pthread_mutex_destroy
-#pragma weak pthread_self
+#if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
+__gthrw3(pthread_cond_destroy)
+__gthrw3(pthread_cond_init)
+__gthrw3(pthread_cond_signal)
+__gthrw3(pthread_exit)
+__gthrw3(pthread_self)
+#else
+__gthrw(pthread_cond_destroy)
+__gthrw(pthread_cond_init)
+__gthrw(pthread_cond_signal)
+__gthrw(pthread_exit)
+__gthrw(pthread_self)
+#endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
#ifdef _POSIX_PRIORITY_SCHEDULING
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak sched_get_priority_max
-#pragma weak sched_get_priority_min
+__gthrw(sched_get_priority_max)
+__gthrw(sched_get_priority_min)
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _POSIX_PRIORITY_SCHEDULING */
-#pragma weak sched_yield
-#pragma weak pthread_attr_destroy
-#pragma weak pthread_attr_init
-#pragma weak pthread_attr_setdetachstate
+__gthrw(sched_yield)
+__gthrw(pthread_attr_destroy)
+__gthrw(pthread_attr_init)
+__gthrw(pthread_attr_setdetachstate)
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak pthread_getschedparam
-#pragma weak pthread_setschedparam
+__gthrw(pthread_getschedparam)
+__gthrw(pthread_setschedparam)
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
#endif /* _LIBOBJC || _LIBOBJC_WEAK */
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
+/* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
+ -pthreads is not specified. The functions are dummies and most return an
+ error value. However pthread_once returns 0 without invoking the routine
+ it is passed so we cannot pretend that the interface is active if -pthreads
+ is not specified. On Solaris 2.5.1, the interface is not exposed at all so
+ we need to play the usual game with weak symbols. On Solaris 10 and up, a
+ working interface is always exposed. */
+
+#if defined(__sun) && defined(__svr4__)
+
+static volatile int __gthread_active = -1;
+
+static void
+__gthread_trigger (void)
+{
+ __gthread_active = 1;
+}
+
+static inline int
+__gthread_active_p (void)
+{
+ static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
+ static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
+
+ /* Avoid reading __gthread_active twice on the main code path. */
+ int __gthread_active_latest_value = __gthread_active;
+
+ /* 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))
+ {
+ if (__gthrw_(pthread_once))
+ {
+ /* If this really is a threaded program, then we must ensure that
+ __gthread_active has been set to 1 before exiting this block. */
+ __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
+ __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
+ __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
+ }
+
+ /* Make sure we'll never enter this block again. */
+ if (__gthread_active < 0)
+ __gthread_active = 0;
+
+ __gthread_active_latest_value = __gthread_active;
+ }
+
+ return __gthread_active_latest_value != 0;
+}
+
+#else /* not Solaris */
+
static inline int
__gthread_active_p (void)
{
static void *const __gthread_active_ptr
- = __extension__ (void *) &pthread_create;
+ = __extension__ (void *) &__gthrw_(pthread_cancel);
return __gthread_active_ptr != 0;
}
+#endif /* Solaris */
+
#else /* not SUPPORTS_WEAK */
+/* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
+ 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
+ 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. */
+
+#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;
+
+ /* 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 ();
+ __gthread_active_latest_value = __gthread_active;
+ }
+
+ return __gthread_active_latest_value != 0;
+}
+
+#else /* not hppa-hpux */
+
static inline int
__gthread_active_p (void)
{
return 1;
}
+#endif /* hppa-hpux */
+
#endif /* SUPPORTS_WEAK */
#ifdef _LIBOBJC
if (__gthread_active_p ())
{
/* Initialize the thread storage key. */
- if (pthread_key_create (&_objc_thread_storage, NULL) == 0)
+ if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
{
/* The normal default detach state for threads is
* PTHREAD_CREATE_JOINABLE which causes threads to not die
* when you think they should. */
- if (pthread_attr_init (&_objc_thread_attribs) == 0
- && pthread_attr_setdetachstate (&_objc_thread_attribs,
+ if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
+ && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
PTHREAD_CREATE_DETACHED) == 0)
return 0;
}
__gthread_objc_close_thread_system (void)
{
if (__gthread_active_p ()
- && pthread_key_delete (_objc_thread_storage) == 0
- && pthread_attr_destroy (&_objc_thread_attribs) == 0)
+ && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
+ && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
return 0;
return -1;
if (!__gthread_active_p ())
return NULL;
- if (!(pthread_create (&new_thread_handle, NULL, (void *) func, arg)))
+ if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
thread_id = (objc_thread_t) new_thread_handle;
else
thread_id = NULL;
{
#ifdef _POSIX_PRIORITY_SCHEDULING
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
- pthread_t thread_id = pthread_self ();
+ pthread_t thread_id = __gthrw_(pthread_self) ();
int policy;
struct sched_param params;
int priority_min, priority_max;
- if (pthread_getschedparam (thread_id, &policy, ¶ms) == 0)
+ if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0)
{
- if ((priority_max = sched_get_priority_max (policy)) == -1)
+ if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
return -1;
- if ((priority_min = sched_get_priority_min (policy)) == -1)
+ if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
return -1;
if (priority > priority_max)
* this should be a pointer to policy but pthread.h is universally
* at odds with this.
*/
- if (pthread_setschedparam (thread_id, policy, ¶ms) == 0)
+ if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0)
return 0;
}
#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
int policy;
struct sched_param params;
- if (pthread_getschedparam (pthread_self (), &policy, ¶ms) == 0)
+ if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0)
return params.sched_priority;
else
return -1;
__gthread_objc_thread_yield (void)
{
if (__gthread_active_p ())
- sched_yield ();
+ __gthrw_(sched_yield) ();
}
/* Terminate the current thread. */
{
if (__gthread_active_p ())
/* exit the thread */
- pthread_exit (&__objc_thread_exit_status);
+ __gthrw_(pthread_exit) (&__objc_thread_exit_status);
/* Failed if we reached here */
return -1;
__gthread_objc_thread_id (void)
{
if (__gthread_active_p ())
- return (objc_thread_t) pthread_self ();
+ return (objc_thread_t) __gthrw_(pthread_self) ();
else
return (objc_thread_t) 1;
}
__gthread_objc_thread_set_data (void *value)
{
if (__gthread_active_p ())
- return pthread_setspecific (_objc_thread_storage, value);
+ return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
else
{
thread_local_storage = value;
__gthread_objc_thread_get_data (void)
{
if (__gthread_active_p ())
- return pthread_getspecific (_objc_thread_storage);
+ return __gthrw_(pthread_getspecific) (_objc_thread_storage);
else
return thread_local_storage;
}
{
mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
- if (pthread_mutex_init ((pthread_mutex_t *) mutex->backend, NULL))
+ if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
{
objc_free (mutex->backend);
mutex->backend = NULL;
/*
* Posix Threads specifically require that the thread be unlocked
- * for pthread_mutex_destroy to work.
+ * for __gthrw_(pthread_mutex_destroy) to work.
*/
do
{
- count = pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+ count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
if (count < 0)
return -1;
}
while (count);
- if (pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
+ if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
return -1;
objc_free (mutex->backend);
__gthread_objc_mutex_lock (objc_mutex_t mutex)
{
if (__gthread_active_p ()
- && pthread_mutex_lock ((pthread_mutex_t *) mutex->backend) != 0)
+ && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
{
return -1;
}
__gthread_objc_mutex_trylock (objc_mutex_t mutex)
{
if (__gthread_active_p ()
- && pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 0)
+ && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
{
return -1;
}
__gthread_objc_mutex_unlock (objc_mutex_t mutex)
{
if (__gthread_active_p ()
- && pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend) != 0)
+ && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
{
return -1;
}
{
condition->backend = objc_malloc (sizeof (pthread_cond_t));
- if (pthread_cond_init ((pthread_cond_t *) condition->backend, NULL))
+ if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
{
objc_free (condition->backend);
condition->backend = NULL;
{
if (__gthread_active_p ())
{
- if (pthread_cond_destroy ((pthread_cond_t *) condition->backend))
+ if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
return -1;
objc_free (condition->backend);
__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
{
if (__gthread_active_p ())
- return pthread_cond_wait ((pthread_cond_t *) condition->backend,
+ return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
(pthread_mutex_t *) mutex->backend);
else
return 0;
__gthread_objc_condition_broadcast (objc_condition_t condition)
{
if (__gthread_active_p ())
- return pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
+ return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
else
return 0;
}
__gthread_objc_condition_signal (objc_condition_t condition)
{
if (__gthread_active_p ())
- return pthread_cond_signal ((pthread_cond_t *) condition->backend);
+ return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
else
return 0;
}
__gthread_once (__gthread_once_t *once, void (*func) (void))
{
if (__gthread_active_p ())
- return 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 *))
{
- return pthread_key_create (key, dtor);
+ return __gthrw_(pthread_key_create) (key, dtor);
}
static inline int
__gthread_key_delete (__gthread_key_t key)
{
- return pthread_key_delete (key);
+ return __gthrw_(pthread_key_delete) (key);
}
static inline void *
__gthread_getspecific (__gthread_key_t key)
{
- return pthread_getspecific (key);
+ return __gthrw_(pthread_getspecific) (key);
}
static inline int
__gthread_setspecific (__gthread_key_t key, const void *ptr)
{
- return pthread_setspecific (key, ptr);
+ return __gthrw_(pthread_setspecific) (key, ptr);
+}
+
+static inline int
+__gthread_mutex_destroy (__gthread_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_mutex_destroy) (mutex);
+ else
+ return 0;
}
static inline int
__gthread_mutex_lock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return pthread_mutex_lock (mutex);
+ return __gthrw_(pthread_mutex_lock) (mutex);
else
return 0;
}
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return pthread_mutex_trylock (mutex);
+ return __gthrw_(pthread_mutex_trylock) (mutex);
else
return 0;
}
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return pthread_mutex_unlock (mutex);
+ return __gthrw_(pthread_mutex_unlock) (mutex);
else
return 0;
}
-#if !defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) && defined(PTHREAD_MUTEX_RECURSIVE)
+#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
static inline int
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
{
pthread_mutexattr_t attr;
int r;
- r = pthread_mutexattr_init (&attr);
+ r = __gthrw_(pthread_mutexattr_init) (&attr);
if (!r)
- r = pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
+ r = __gthrw_(pthread_mutexattr_settype) (&attr, PTHREAD_MUTEX_RECURSIVE);
if (!r)
- r = pthread_mutex_init (mutex, &attr);
+ r = __gthrw_(pthread_mutex_init) (mutex, &attr);
if (!r)
- r = pthread_mutexattr_destroy (&attr);
+ r = __gthrw_(pthread_mutexattr_destroy) (&attr);
return r;
}
+ return 0;
}
#endif
return __gthread_mutex_unlock (mutex);
}
+static inline int
+__gthread_cond_broadcast (__gthread_cond_t *cond)
+{
+ return __gthrw_(pthread_cond_broadcast) (cond);
+}
+
+static inline int
+__gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex)
+{
+ return __gthrw_(pthread_cond_wait) (cond, mutex);
+}
+
+static inline int
+__gthread_cond_wait_recursive (__gthread_cond_t *cond,
+ __gthread_recursive_mutex_t *mutex)
+{
+ return __gthread_cond_wait (cond, mutex);
+}
+
#endif /* _LIBOBJC */
#endif /* ! GCC_GTHR_POSIX_H */
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