-
+/* 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, 2004 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_dce_h
-#define __gthr_dce_h
+#ifndef GCC_GTHR_DCE_H
+#define GCC_GTHR_DCE_H
+/* If _DCE_THREADS is not defined, then we're building the single
+ threaded version of the libraries and do not want to reference
+ anything related to pthreads or dce. */
+#ifndef _DCE_THREADS
+#include "gthr-single.h"
+#else
/* DCE threads interface.
DCE threads are based on POSIX threads draft 4, and many things
- have changed since then. */
+ have changed since then. */
#define __GTHREADS 1
#include <pthread.h>
+#ifdef __cplusplus
+#define UNUSED(x) x
+#else
+#define UNUSED(x) x __attribute__((unused))
+#endif
+
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_ONCE_INIT pthread_once_init
-/* Howto define __GTHREAD_MUTEX_INIT? */
+
+#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
+
+#define __GTHREAD_MUTEX_INIT_DEFAULT pthread_once_init
#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
#pragma weak pthread_once
#pragma weak pthread_once_init
-#pragma weak pthread_key_create
+#pragma weak pthread_keycreate
#pragma weak pthread_key_delete
#pragma weak pthread_getspecific
#pragma weak pthread_setspecific
#pragma weak pthread_create
-
+#pragma weak pthread_mutex_init
#pragma weak pthread_mutex_lock
#pragma weak pthread_mutex_trylock
#pragma weak pthread_mutex_unlock
+#pragma weak pthread_mutexattr_create
+#pragma weak pthread_mutexattr_setkind_np
+#pragma weak pthread_mutexattr_delete
-static void *__gthread_active_ptr = &pthread_create;
+#ifdef _LIBOBJC
+/* 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_getunique_np
+#pragma weak pthread_mutex_destroy
+#pragma weak pthread_self
+#pragma weak pthread_yield
+#endif
static inline int
__gthread_active_p (void)
{
+ static void *const __gthread_active_ptr = (void *) &pthread_create;
return __gthread_active_ptr != 0;
}
#endif /* SUPPORTS_WEAK */
+#ifdef _LIBOBJC
+
+/* Key structure for maintaining thread specific storage */
+static pthread_key_t _objc_thread_storage;
+
+/* 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. */
+ return pthread_keycreate (&_objc_thread_storage, NULL);
else
return -1;
}
+/* Close the threads subsystem. */
static inline int
-__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
+__gthread_objc_close_thread_system (void)
{
- return pthread_keycreate (key, dtor);
+ if (__gthread_active_p ())
+ return 0;
+ else
+ 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, pthread_attr_default,
+ (void *) func, arg)))
+ {
+ /* ??? May not work! (64bit) */
+ thread_id = *(objc_thread_t *) &new_thread_handle;
+ pthread_detach (&new_thread_handle); /* Fully detach thread. */
+ }
+ else
+ thread_id = NULL;
+
+ return thread_id;
+}
+
+/* Set the current thread's priority. */
+static inline int
+__gthread_objc_thread_set_priority (int priority)
+{
+ int sys_priority = 0;
+
+ if (!__gthread_active_p ())
+ return -1;
+
+ switch (priority)
+ {
+ case OBJC_THREAD_INTERACTIVE_PRIORITY:
+ sys_priority = (PRI_FG_MIN_NP + PRI_FG_MAX_NP) / 2;
+ break;
+ default:
+ case OBJC_THREAD_BACKGROUND_PRIORITY:
+ sys_priority = (PRI_BG_MIN_NP + PRI_BG_MAX_NP) / 2;
+ break;
+ case OBJC_THREAD_LOW_PRIORITY:
+ sys_priority = (PRI_BG_MIN_NP + PRI_BG_MAX_NP) / 2;
+ break;
+ }
+
+ /* Change the priority. */
+ if (pthread_setprio (pthread_self (), sys_priority) >= 0)
+ return 0;
+ else
+ /* Failed */
+ return -1;
+}
+
+/* Return the current thread's priority. */
+static inline int
+__gthread_objc_thread_get_priority (void)
+{
+ int sys_priority;
+
+ if (__gthread_active_p ())
+ {
+ if ((sys_priority = pthread_getprio (pthread_self ())) >= 0)
+ {
+ if (sys_priority >= PRI_FG_MIN_NP
+ && sys_priority <= PRI_FG_MAX_NP)
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+ if (sys_priority >= PRI_BG_MIN_NP
+ && sys_priority <= PRI_BG_MAX_NP)
+ return OBJC_THREAD_BACKGROUND_PRIORITY;
+ return OBJC_THREAD_LOW_PRIORITY;
+ }
+
+ /* Failed */
+ return -1;
+ }
+ else
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+}
+
+/* Yield our process time to another thread. */
+static inline void
+__gthread_objc_thread_yield (void)
+{
+ if (__gthread_active_p ())
+ pthread_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 ())
+ {
+ pthread_t self = pthread_self ();
+
+ return (objc_thread_t) pthread_getunique_np (&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 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)
+{
+ void *value = NULL;
+
+ if (__gthread_active_p ())
+ {
+ if (!(pthread_getspecific (_objc_thread_storage, &value)))
+ return value;
+
+ return NULL;
+ }
+ 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,
+ pthread_mutexattr_default))
+ {
+ 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 ())
+ {
+ 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 ())
+ return pthread_mutex_lock ((pthread_mutex_t *) mutex->backend);
+ else
+ return 0;
}
+/* Try to grab a lock on a mutex. */
static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
+__gthread_objc_mutex_trylock (objc_mutex_t mutex)
{
- /* Nothing needed. */
+ if (__gthread_active_p ()
+ && pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 1)
+ return -1;
+
return 0;
}
+/* Unlock the mutex */
+static inline int
+__gthread_objc_mutex_unlock (objc_mutex_t mutex)
+{
+ if (__gthread_active_p ())
+ return pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+ else
+ return 0;
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+static inline int
+__gthread_objc_condition_allocate (objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ /* Unimplemented. */
+ return -1;
+ else
+ return 0;
+}
+
+/* Deallocate a condition. */
+static inline int
+__gthread_objc_condition_deallocate (objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ /* Unimplemented. */
+ return -1;
+ else
+ 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 ())
+ /* Unimplemented. */
+ return -1;
+ 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 ())
+ /* Unimplemented. */
+ return -1;
+ 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 ())
+ /* Unimplemented. */
+ return -1;
+ 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_keycreate (key, dtor);
+}
+
static inline int
-__gthread_key_delete (__gthread_key_t key)
+__gthread_key_delete (UNUSED (__gthread_key_t key))
{
- return pthread_key_delete (key);
+ /* Operation is not supported. */
+ return -1;
}
static inline void *
return pthread_setspecific (key, (void *) ptr);
}
+static inline void
+__gthread_mutex_init_function (__gthread_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ pthread_mutex_init (mutex, pthread_mutexattr_default);
+}
+
static inline int
__gthread_mutex_lock (__gthread_mutex_t *mutex)
{
return 0;
}
-#endif /* not __gthr_dce_h */
+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_create (&attr);
+ if (!r)
+ r = pthread_mutexattr_setkind_np (&attr, MUTEX_RECURSIVE_NP);
+ if (!r)
+ r = pthread_mutex_init (mutex, attr);
+ if (!r)
+ r = pthread_mutexattr_delete (&attr);
+ return r;
+ }
+}
+
+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 */
+
+#undef UNUSED
+
+#endif
+#endif /* ! GCC_GTHR_DCE_H */
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