-/* Threads compatibility routines for libgcc2. */
+/* Threads compatibility routines for libgcc2 and libobjc. */
/* Compile this one with gcc. */
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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 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.
-GNU CC 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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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 exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
-#ifndef __gthr_posix_h
-#define __gthr_posix_h
+#ifndef GCC_GTHR_POSIX_H
+#define GCC_GTHR_POSIX_H
/* POSIX threads specific definitions.
- Easy, since the interface is just one-to-one mapping. */
+ Easy, since the interface is just one-to-one mapping. */
#define __GTHREADS 1
+/* Some implementations of <pthread.h> require this to be defined. */
+#ifndef _REENTRANT
+#define _REENTRANT 1
+#endif
+
#include <pthread.h>
+#include <unistd.h>
typedef pthread_key_t __gthread_key_t;
typedef pthread_once_t __gthread_once_t;
typedef pthread_mutex_t __gthread_mutex_t;
+typedef pthread_mutex_t __gthread_recursive_mutex_t;
#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
+#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
+#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
+#else
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
+#endif
#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw2(name,name2,type) \
+ static __typeof(type) name __attribute__ ((__weakref__(#name2)));
+# define __gthrw_(name) __gthrw_ ## name
+#else
+# define __gthrw2(name,name2,type)
+# define __gthrw_(name) name
+#endif
+
+/* 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)
+#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)
+#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
+__gthrw(pthread_key_create)
+__gthrw(pthread_key_delete)
+__gthrw(pthread_mutexattr_init)
+__gthrw(pthread_mutexattr_settype)
+__gthrw(pthread_mutexattr_destroy)
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
-static void *__gthread_active_ptr = &pthread_create;
+#if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
+/* Objective-C. */
+#if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
+__gthrw3(pthread_cond_broadcast)
+__gthrw3(pthread_cond_destroy)
+__gthrw3(pthread_cond_init)
+__gthrw3(pthread_cond_signal)
+__gthrw3(pthread_cond_wait)
+__gthrw3(pthread_exit)
+__gthrw3(pthread_mutex_destroy)
+__gthrw3(pthread_self)
+#else
+__gthrw(pthread_cond_broadcast)
+__gthrw(pthread_cond_destroy)
+__gthrw(pthread_cond_init)
+__gthrw(pthread_cond_signal)
+__gthrw(pthread_cond_wait)
+__gthrw(pthread_exit)
+__gthrw(pthread_mutex_destroy)
+__gthrw(pthread_self)
+#endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
+#ifdef _POSIX_PRIORITY_SCHEDULING
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+__gthrw(sched_get_priority_max)
+__gthrw(sched_get_priority_min)
+#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
+#endif /* _POSIX_PRIORITY_SCHEDULING */
+__gthrw(sched_yield)
+__gthrw(pthread_attr_destroy)
+__gthrw(pthread_attr_init)
+__gthrw(pthread_attr_setdetachstate)
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+__gthrw(pthread_getschedparam)
+__gthrw(pthread_setschedparam)
+#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
+#endif /* _LIBOBJC || _LIBOBJC_WEAK */
+
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
static inline int
__gthread_active_p (void)
{
+ static void *const __gthread_active_ptr
+ = __extension__ (void *) &__gthrw_(pthread_cancel);
return __gthread_active_ptr != 0;
}
#endif /* SUPPORTS_WEAK */
+#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 pthread_key_t _objc_thread_storage;
+static pthread_attr_t _objc_thread_attribs;
+
+/* Thread local storage for a single thread */
+static void *thread_local_storage = NULL;
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
static inline int
-__gthread_once (__gthread_once_t *once, void (*func) (void))
+__gthread_objc_init_thread_system (void)
{
if (__gthread_active_p ())
- return pthread_once (once, func);
+ {
+ /* Initialize the thread storage key. */
+ 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 (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
+ && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
+ PTHREAD_CREATE_DETACHED) == 0)
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+/* Close the threads subsystem. */
+static inline int
+__gthread_objc_close_thread_system (void)
+{
+ if (__gthread_active_p ()
+ && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
+ && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 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;
+ pthread_t new_thread_handle;
+
+ if (!__gthread_active_p ())
+ return NULL;
+
+ if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
+ thread_id = (objc_thread_t) new_thread_handle;
else
+ thread_id = NULL;
+
+ return thread_id;
+}
+
+/* Set the current thread's priority. */
+static inline int
+__gthread_objc_thread_set_priority (int priority)
+{
+ if (!__gthread_active_p ())
return -1;
+ else
+ {
+#ifdef _POSIX_PRIORITY_SCHEDULING
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+ pthread_t thread_id = __gthrw_(pthread_self) ();
+ int policy;
+ struct sched_param params;
+ int priority_min, priority_max;
+
+ if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0)
+ {
+ if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
+ return -1;
+
+ if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
+ return -1;
+
+ if (priority > priority_max)
+ priority = priority_max;
+ else if (priority < priority_min)
+ priority = priority_min;
+ params.sched_priority = priority;
+
+ /*
+ * The solaris 7 and several other man pages incorrectly state that
+ * this should be a pointer to policy but pthread.h is universally
+ * at odds with this.
+ */
+ if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0)
+ return 0;
+ }
+#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
+#endif /* _POSIX_PRIORITY_SCHEDULING */
+ return -1;
+ }
}
+/* Return the current thread's priority. */
static inline int
-__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
+__gthread_objc_thread_get_priority (void)
+{
+#ifdef _POSIX_PRIORITY_SCHEDULING
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+ if (__gthread_active_p ())
+ {
+ int policy;
+ struct sched_param params;
+
+ if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0)
+ return params.sched_priority;
+ else
+ return -1;
+ }
+ else
+#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
+#endif /* _POSIX_PRIORITY_SCHEDULING */
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+}
+
+/* Yield our process time to another thread. */
+static inline void
+__gthread_objc_thread_yield (void)
+{
+ if (__gthread_active_p ())
+ __gthrw_(sched_yield) ();
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit (void)
+{
+ if (__gthread_active_p ())
+ /* exit the thread */
+ __gthrw_(pthread_exit) (&__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)
+{
+ if (__gthread_active_p ())
+ return (objc_thread_t) __gthrw_(pthread_self) ();
+ else
+ return (objc_thread_t) 1;
+}
+
+/* Sets the thread's local storage pointer. */
+static inline int
+__gthread_objc_thread_set_data (void *value)
+{
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
+ else
+ {
+ thread_local_storage = value;
+ return 0;
+ }
+}
+
+/* Returns the thread's local storage pointer. */
+static inline void *
+__gthread_objc_thread_get_data (void)
+{
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_getspecific) (_objc_thread_storage);
+ else
+ return thread_local_storage;
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+static inline int
+__gthread_objc_mutex_allocate (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ())
+ {
+ mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
+
+ if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
+ {
+ objc_free (mutex->backend);
+ mutex->backend = NULL;
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/* Deallocate a mutex. */
+static inline int
+__gthread_objc_mutex_deallocate (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ())
+ {
+ int count;
+
+ /*
+ * Posix Threads specifically require that the thread be unlocked
+ * for __gthrw_(pthread_mutex_destroy) to work.
+ */
+
+ do
+ {
+ count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
+ if (count < 0)
+ return -1;
+ }
+ while (count);
+
+ if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
+ return -1;
+
+ objc_free (mutex->backend);
+ mutex->backend = NULL;
+ }
+ return 0;
+}
+
+/* Grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_lock (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ()
+ && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Try to grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_trylock (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ()
+ && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Unlock the mutex */
+static inline int
+__gthread_objc_mutex_unlock (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ()
+ && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+static inline int
+__gthread_objc_condition_allocate (objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ {
+ condition->backend = objc_malloc (sizeof (pthread_cond_t));
+
+ if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
+ {
+ objc_free (condition->backend);
+ condition->backend = NULL;
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/* Deallocate a condition. */
+static inline int
+__gthread_objc_condition_deallocate (objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ {
+ if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
+ return -1;
+
+ objc_free (condition->backend);
+ condition->backend = NULL;
+ }
+ return 0;
+}
+
+/* Wait on the condition */
+static inline int
+__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
+{
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
+ (pthread_mutex_t *) mutex->backend);
+ else
+ return 0;
+}
+
+/* Wake up all threads waiting on this condition. */
+static inline int
+__gthread_objc_condition_broadcast (objc_condition_t condition)
{
- return pthread_key_create (key, dtor);
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
+ else
+ return 0;
}
+/* Wake up one thread waiting on this condition. */
static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
+__gthread_objc_condition_signal (objc_condition_t condition)
{
- /* Just reset the key value to zero. */
- if (ptr)
- return pthread_setspecific (key, 0);
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
else
return 0;
}
+#else /* _LIBOBJC */
+
+static inline int
+__gthread_once (__gthread_once_t *once, void (*func) (void))
+{
+ if (__gthread_active_p ())
+ return __gthrw_(pthread_once) (once, func);
+ else
+ return -1;
+}
+
+static inline int
+__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
+{
+ 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_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;
}
-#endif /* not __gthr_posix_h */
+#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+static inline int
+__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;
+ }
+ return 0;
+}
+#endif
+
+static inline int
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
+{
+ return __gthread_mutex_lock (mutex);
+}
+
+static inline int
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
+{
+ return __gthread_mutex_trylock (mutex);
+}
+
+static inline int
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
+{
+ return __gthread_mutex_unlock (mutex);
+}
+
+#endif /* _LIBOBJC */
+
+#endif /* ! GCC_GTHR_POSIX_H */
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