-/* 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 Free Software Foundation, Inc.
This file is part of GNU CC.
#pragma weak mutex_trylock
#pragma weak mutex_unlock
+#ifdef _LIBOBJC
+#pragma weak thr_exit
+#pragma weak thr_keycreate
+#pragma weak thr_getprio
+#pragma weak thr_self
+#pragma weak thr_setprio
+#pragma weak thr_yield
+
+#pragma weak cond_init
+#pragma weak cond_destroy
+#pragma weak cond_wait
+#pragma weak cond_broadcast
+#pragma weak cond_signal
+
+#pragma weak mutex_init
+#pragma weak mutex_destroy
+#endif
+
/* This will not actually work in Solaris 2.5, since libc contains
dummy symbols of all thr_* routines. */
#endif /* SUPPORTS_WEAK */
+#ifdef _LIBOBJC
+
+/* Key structure for maintaining thread specific storage */
+static thread_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)
+{
+ /* Initialize the thread storage key */
+ if (__gthread_active_p ()
+ && thr_keycreate(&_objc_thread_storage, NULL) == 0)
+ return 0;
+
+ 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;
+ thread_t new_thread_id = 0;
+
+ if (!__gthread_active_p ())
+ return NULL;
+
+ if (thr_create(NULL, 0, (void *)func, arg,
+ THR_DETACHED | THR_NEW_LWP,
+ &new_thread_id) == 0)
+ thread_id = *(objc_thread_t *)&new_thread_id;
+ 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 = 300;
+ break;
+ default:
+ case OBJC_THREAD_BACKGROUND_PRIORITY:
+ sys_priority = 200;
+ break;
+ case OBJC_THREAD_LOW_PRIORITY:
+ sys_priority = 1000;
+ break;
+ }
+
+ /* Change priority */
+ if (thr_setprio(thr_self(), sys_priority) == 0)
+ return 0;
+ else
+ return -1;
+}
+
+/* Return the current thread's priority. */
+static inline int
+__gthread_objc_thread_get_priority(void)
+{
+ int sys_priority;
+
+ if (!__gthread_active_p ())
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+
+ if (thr_getprio(thr_self(), &sys_priority) == 0)
+ {
+ if (sys_priority >= 250)
+ return OBJC_THREAD_INTERACTIVE_PRIORITY;
+ else if (sys_priority >= 150)
+ return OBJC_THREAD_BACKGROUND_PRIORITY;
+ return OBJC_THREAD_LOW_PRIORITY;
+ }
+
+ /* Couldn't get priority. */
+ return -1;
+}
+
+/* Yield our process time to another thread. */
+static inline void
+__gthread_objc_thread_yield(void)
+{
+ if (__gthread_active_p ())
+ thr_yield();
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit(void)
+{
+ if (__gthread_active_p ())
+ /* exit the thread */
+ thr_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)thr_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 ())
+ {
+ if (thr_setspecific(_objc_thread_storage, value) == 0)
+ return 0;
+ else
+ return -1;
+ }
+ 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 (thr_getspecific(_objc_thread_storage, &value) == 0)
+ return value;
+ else
+ 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_init( (mutex_t *)(&(mutex->backend)), USYNC_THREAD, 0))
+ return -1;
+
+ return 0;
+}
+
+/* Deallocate a mutex. */
+static inline int
+__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
+{
+ if (__gthread_active_p ())
+ mutex_destroy((mutex_t *)(&(mutex->backend)));
+
+ return 0;
+}
+
+/* Grab a lock on a mutex. */
+static inline int
+__gthread_objc_mutex_lock(objc_mutex_t mutex)
+{
+ if (__gthread_active_p ()
+ && mutex_lock((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 ()
+ && mutex_trylock((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 ()
+ && mutex_unlock((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 ())
+ return cond_init((cond_t *)(&(condition->backend)), USYNC_THREAD,
+ NULL);
+ else
+ return 0;
+}
+
+/* Deallocate a condition. */
+static inline int
+__gthread_objc_condition_deallocate(objc_condition_t condition)
+{
+ if (__gthread_active_p ())
+ return cond_destroy((cond_t *)(&(condition->backend)));
+ 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 ())
+ return cond_wait((cond_t *)(&(condition->backend)),
+ (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 cond_broadcast((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 cond_signal((cond_t *)(&(condition->backend)));
+ else
+ return 0;
+}
+
+#else /* _LIBOBJC */
+
static inline int
__gthread_once (__gthread_once_t *once, void (*func) (void))
{
return 0;
}
+#endif /* _LIBOBJC */
+
#endif /* not __gthr_solaris_h */
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