-/* 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
+ 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, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, 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
#pragma weak pthread_getspecific
#pragma weak pthread_setspecific
#pragma weak pthread_create
+#pragma weak pthread_cancel
+
+#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
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
+#pragma weak pthread_mutex_init
-static void *__gthread_active_ptr = &pthread_create;
+#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
+#ifdef _POSIX_PRIORITY_SCHEDULING
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+#pragma weak sched_get_priority_max
+#pragma weak 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
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+#pragma weak pthread_getschedparam
+#pragma weak pthread_setschedparam
+#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
+#endif /* _LIBOBJC || _LIBOBJC_WEAK */
static inline int
-__gthread_active_p ()
+__gthread_active_p (void)
{
+ static void *const __gthread_active_ptr
+ = __extension__ (void *) &pthread_cancel;
return __gthread_active_ptr != 0;
}
#else /* not SUPPORTS_WEAK */
static inline int
-__gthread_active_p ()
+__gthread_active_p (void)
{
return 1;
}
#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) ())
+__gthread_objc_init_thread_system (void)
{
if (__gthread_active_p ())
- return pthread_once (once, func);
+ {
+ /* Initialize the thread storage key. */
+ if (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,
+ 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 ()
+ && pthread_key_delete (_objc_thread_storage) == 0
+ && 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 (!(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 = pthread_self ();
+ int policy;
+ struct sched_param params;
+ int priority_min, priority_max;
+
+ if (pthread_getschedparam (thread_id, &policy, ¶ms) == 0)
+ {
+ if ((priority_max = sched_get_priority_max (policy)) == -1)
+ return -1;
+
+ if ((priority_min = 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 (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)
{
- return pthread_key_create (key, dtor);
+#ifdef _POSIX_PRIORITY_SCHEDULING
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+ if (__gthread_active_p ())
+ {
+ int policy;
+ struct sched_param params;
+
+ if (pthread_getschedparam (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 ())
+ sched_yield ();
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit (void)
+{
+ if (__gthread_active_p ())
+ /* exit the thread */
+ 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) pthread_self ();
+ else
+ return (objc_thread_t) 1;
}
+/* Sets the thread's local storage pointer. */
static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
+__gthread_objc_thread_set_data (void *value)
+{
+ if (__gthread_active_p ())
+ return 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)
{
- /* Just reset the key value to zero. */
- if (ptr)
- return pthread_setspecific (key, 0);
+ if (__gthread_active_p ())
+ return 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 (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 pthread_mutex_destroy to work.
+ */
+
+ do
+ {
+ count = pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+ if (count < 0)
+ return -1;
+ }
+ while (count);
+
+ if (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 ()
+ && 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 ()
+ && 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 ()
+ && 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 (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 (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 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)
+{
+ if (__gthread_active_p ())
+ return pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
else
return 0;
}
+/* Wake up one thread waiting on this condition. */
+static inline int
+__gthread_objc_condition_signal (objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ return 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 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);
+}
+
static inline int
__gthread_key_delete (__gthread_key_t key)
{
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 = pthread_mutexattr_init (&attr);
+ if (!r)
+ r = pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
+ if (!r)
+ r = pthread_mutex_init (mutex, &attr);
+ if (!r)
+ r = pthread_mutexattr_destroy (&attr);
+ return r;
+ }
+}
+#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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