/* Compile this one with gcc. */
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU CC.
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
/* DCE threads interface.
DCE threads are based on POSIX threads draft 4, and many things
#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;
#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_mutex_trylock
#pragma weak pthread_mutex_unlock
+#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_init
+#pragma weak pthread_mutex_destroy
+#pragma weak pthread_self
+#pragma weak pthread_yield
+#endif
+
static void *__gthread_active_ptr = &pthread_create;
static inline int
#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_objc_init_thread_system(void)
+{
+ if (__gthread_active_p ())
+ /* Initialize the thread storage key */
+ return pthread_keycreate (&_objc_thread_storage, NULL);
+ else
+ return -1;
+}
+
+/* Close the threads subsystem. */
+static inline int
+__gthread_objc_close_thread_system(void)
+{
+ 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_objc_mutex_trylock(objc_mutex_t mutex)
+{
+ 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))
{
}
static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
+__gthread_key_dtor (UNUSED (__gthread_key_t key), UNUSED (void *ptr))
{
/* Nothing needed. */
return 0;
}
+#if defined (__PTHREAD_LIBRARY_VERSION_1) && __PTHREAD_LIBRARY_VERSION_1 >= 1
static inline int
__gthread_key_delete (__gthread_key_t key)
{
return pthread_key_delete (key);
}
+#else
+static inline int
+__gthread_key_delete (UNUSED (__gthread_key_t key))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+#endif
static inline void *
__gthread_getspecific (__gthread_key_t key)
return 0;
}
-#endif /* not __gthr_dce_h */
+#endif /* _LIBOBJC */
+
+#undef UNUSED
+
+#endif /* ! GCC_GTHR_DCE_H */
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