-/* Threads compatibily 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, 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_solaris_h
-#define __gthr_solaris_h
+#ifndef GCC_GTHR_SOLARIS_H
+#define GCC_GTHR_SOLARIS_H
/* Solaris threads as found in Solaris 2.[456].
Actually these are Unix International (UI) threads, but I don't
- know if anyone else implements these. */
+ know if anyone else implements these. */
#define __GTHREADS 1
#include <thread.h>
#include <errno.h>
+#ifdef __cplusplus
+#define UNUSED(x)
+#else
+#define UNUSED(x) x __attribute__((unused))
+#endif
+
typedef thread_key_t __gthread_key_t;
-typedef struct
-{
+typedef struct {
mutex_t mutex;
int once;
} __gthread_once_t;
typedef mutex_t __gthread_mutex_t;
+typedef struct {
+ long depth;
+ thread_t owner;
+ mutex_t actual;
+} __gthread_recursive_mutex_t;
+
#define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 }
#define __GTHREAD_MUTEX_INIT DEFAULTMUTEX
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+ static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
+# define __gthrw_(name) __gthrw_ ## name
+#else
+# define __gthrw(name)
+# define __gthrw_(name) name
+#endif
+
+__gthrw(thr_keycreate)
+__gthrw(thr_getspecific)
+__gthrw(thr_setspecific)
+__gthrw(thr_create)
+__gthrw(thr_self)
+
+__gthrw(mutex_init)
+__gthrw(mutex_destroy)
+__gthrw(mutex_lock)
+__gthrw(mutex_trylock)
+__gthrw(mutex_unlock)
+
+#ifdef _LIBOBJC
+__gthrw(thr_exit)
+__gthrw(thr_getprio)
+__gthrw(thr_setprio)
+__gthrw(thr_yield)
+
+__gthrw(cond_init)
+__gthrw(cond_destroy)
+__gthrw(cond_wait)
+__gthrw(cond_broadcast)
+__gthrw(cond_signal)
+
+#endif
-#pragma weak thr_keycreate
-#pragma weak thr_getspecific
-#pragma weak thr_setspecific
-#pragma weak thr_create
-
-#pragma weak mutex_lock
-#pragma weak mutex_trylock
-#pragma weak mutex_unlock
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
/* This will not actually work in Solaris 2.5, since libc contains
- dummy symbols of all thr_* routines. */
-
-static void *__gthread_active_ptr = &thr_create;
+ dummy symbols of all thr_* routines. */
static inline int
-__gthread_active_p ()
+__gthread_active_p (void)
{
+ static void *const __gthread_active_ptr = (void *) &__gthrw_(thr_create);
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
+
+/* 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_once (__gthread_once_t *once, void (*func) ())
+__gthread_objc_init_thread_system (void)
{
- if (! __gthread_active_p ())
+ /* Initialize the thread storage key. */
+ if (__gthread_active_p ()
+ && __gthrw_(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;
+}
- if (once == 0 || func == 0)
+/* 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 (__gthrw_(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)
{
- errno = EINVAL;
- return -1;
+ 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;
}
- if (once->once == 0)
+ /* Change priority */
+ if (__gthrw_(thr_setprio) (__gthrw_(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 (__gthrw_(thr_getprio) (__gthrw_(thr_self) (), &sys_priority) == 0)
{
- if (mutex_lock (&once->mutex) != 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 ())
+ __gthrw_(thr_yield) ();
+}
+
+/* Terminate the current thread. */
+static inline int
+__gthread_objc_thread_exit (void)
+{
+ if (__gthread_active_p ())
+ /* exit the thread */
+ __gthrw_(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) __gthrw_(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 (__gthrw_(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 (__gthrw_(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 ()
+ && __gthrw_(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 ())
+ __gthrw_(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 ()
+ && __gthrw_(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 ()
+ && __gthrw_(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 ()
+ && __gthrw_(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 __gthrw_(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 __gthrw_(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 __gthrw_(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 __gthrw_(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 __gthrw_(cond_signal) ((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 -1;
+
+ if (once == 0 || func == 0)
+ return EINVAL;
+
+ if (once->once == 0)
+ {
+ int status = __gthrw_(mutex_lock) (&once->mutex);
+ if (status != 0)
+ return status;
if (once->once == 0)
{
(*func) ();
- once->once ++;
+ once->once++;
}
- mutex_unlock (&once->mutex);
+ __gthrw_(mutex_unlock) (&once->mutex);
}
return 0;
}
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
{
/* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually
- got a reasonable key value, and if not, fail. */
- *key = -1;
- if (thr_keycreate (key, dtor) == -1 || *key == -1)
+ got a reasonable key value, and if not, fail. */
+ *key = (__gthread_key_t)-1;
+ if (__gthrw_(thr_keycreate) (key, dtor) != 0 || *key == (__gthread_key_t)-1)
return -1;
else
return 0;
}
static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
+__gthread_key_delete (__gthread_key_t UNUSED (key))
{
- /* Nothing needed. */
- return 0;
-}
-
-static inline int
-__gthread_key_delete (__gthread_key_t key)
-{
- /* Not possible. */
+ /* Not possible. */
return -1;
}
__gthread_getspecific (__gthread_key_t key)
{
void *ptr;
- if (thr_getspecific (key, &ptr) == 0)
+ if (__gthrw_(thr_getspecific) (key, &ptr) == 0)
return ptr;
else
return 0;
static inline int
__gthread_setspecific (__gthread_key_t key, const void *ptr)
{
- return thr_setspecific (key, (void *) ptr);
+ return __gthrw_(thr_setspecific) (key, (void *) ptr);
}
static inline int
__gthread_mutex_lock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return mutex_lock (mutex);
+ return __gthrw_(mutex_lock) (mutex);
else
return 0;
}
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return mutex_trylock (mutex);
+ return __gthrw_(mutex_trylock) (mutex);
else
return 0;
}
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
{
if (__gthread_active_p ())
- return mutex_unlock (mutex);
+ return __gthrw_(mutex_unlock) (mutex);
else
return 0;
}
-#endif /* not __gthr_solaris_h */
+static inline int
+__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
+{
+ mutex->depth = 0;
+ mutex->owner = (thread_t) 0;
+ return __gthrw_(mutex_init) (&mutex->actual, USYNC_THREAD, 0);
+}
+
+static inline int
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ {
+ thread_t me = __gthrw_(thr_self) ();
+
+ if (mutex->owner != me)
+ {
+ __gthrw_(mutex_lock) (&mutex->actual);
+ mutex->owner = me;
+ }
+
+ mutex->depth++;
+ }
+ return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ {
+ thread_t me = __gthrw_(thr_self) ();
+
+ if (mutex->owner != me)
+ {
+ if (__gthrw_(mutex_trylock) (&mutex->actual))
+ return 1;
+ mutex->owner = me;
+ }
+
+ mutex->depth++;
+ }
+ return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
+{
+ if (__gthread_active_p ())
+ {
+ if (--mutex->depth == 0)
+ {
+ mutex->owner = (thread_t) 0;
+ __gthrw_(mutex_unlock) (&mutex->actual);
+ }
+ }
+ return 0;
+}
+
+#endif /* _LIBOBJC */
+
+#undef UNUSED
+
+#endif /* ! GCC_GTHR_SOLARIS_H */
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