1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
28 #error "Only <glib.h> can be included directly."
31 #ifndef __G_THREAD_H__
32 #define __G_THREAD_H__
34 #include <glib/gerror.h>
35 #include <glib/gutils.h> /* for G_INLINE_FUNC */
36 #include <glib/gatomic.h> /* for g_atomic_pointer_get */
40 /* GLib Thread support
43 extern GQuark g_thread_error_quark (void);
44 #define G_THREAD_ERROR g_thread_error_quark ()
48 G_THREAD_ERROR_AGAIN /* Resource temporarily unavailable */
51 typedef gpointer (*GThreadFunc) (gpointer data);
53 typedef struct _GThread GThread;
55 typedef union _GMutex GMutex;
56 typedef struct _GRecMutex GRecMutex;
57 typedef struct _GRWLock GRWLock;
58 typedef struct _GCond GCond;
59 typedef struct _GPrivate GPrivate;
60 typedef struct _GStaticPrivate GStaticPrivate;
90 #define G_PRIVATE_INIT(notify) { NULL, (notify), { NULL, NULL } }
94 GDestroyNotify notify;
98 GThread *g_thread_new (const gchar *name,
104 GThread *g_thread_new_full (const gchar *name,
111 GThread* g_thread_self (void);
112 void g_thread_exit (gpointer retval);
113 gpointer g_thread_join (GThread *thread);
114 void g_thread_yield (void);
118 G_ONCE_STATUS_NOTCALLED,
119 G_ONCE_STATUS_PROGRESS,
123 typedef struct _GOnce GOnce;
126 volatile GOnceStatus status;
127 volatile gpointer retval;
130 #define G_ONCE_INIT { G_ONCE_STATUS_NOTCALLED, NULL }
132 gpointer g_once_impl (GOnce *once, GThreadFunc func, gpointer arg);
134 #ifdef G_ATOMIC_OP_MEMORY_BARRIER_NEEDED
135 # define g_once(once, func, arg) g_once_impl ((once), (func), (arg))
136 #else /* !G_ATOMIC_OP_MEMORY_BARRIER_NEEDED*/
137 # define g_once(once, func, arg) \
138 (((once)->status == G_ONCE_STATUS_READY) ? \
140 g_once_impl ((once), (func), (arg)))
141 #endif /* G_ATOMIC_OP_MEMORY_BARRIER_NEEDED */
143 /* initialize-once guards, keyed by location */
144 gboolean g_once_init_enter (volatile void *location);
145 void g_once_init_leave (volatile void *location,
149 # define g_once_init_enter(location) \
150 (G_GNUC_EXTENSION ({ \
151 G_STATIC_ASSERT (sizeof *(location) == sizeof (gpointer)); \
152 (void) (0 ? (gpointer) *(location) : 0); \
153 (!g_atomic_pointer_get (location) && \
154 g_once_init_enter (location)); \
156 # define g_once_init_leave(location, result) \
157 (G_GNUC_EXTENSION ({ \
158 G_STATIC_ASSERT (sizeof *(location) == sizeof (gpointer)); \
159 (void) (0 ? *(location) = (result) : 0); \
160 g_once_init_leave ((location), (gsize) (result)); \
163 # define g_once_init_enter(location) \
164 (g_once_init_enter((location)))
165 # define g_once_init_leave(location, result) \
166 (g_once_init_leave((location), (gsize) (result)))
169 #define G_LOCK_NAME(name) g__ ## name ## _lock
170 #define G_LOCK_DEFINE_STATIC(name) static G_LOCK_DEFINE (name)
171 #define G_LOCK_DEFINE(name) GMutex G_LOCK_NAME (name)
172 #define G_LOCK_EXTERN(name) extern GMutex G_LOCK_NAME (name)
175 # define G_LOCK(name) G_STMT_START{ \
176 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
177 "file %s: line %d (%s): locking: %s ", \
178 __FILE__, __LINE__, G_STRFUNC, \
180 g_mutex_lock (&G_LOCK_NAME (name)); \
182 # define G_UNLOCK(name) G_STMT_START{ \
183 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
184 "file %s: line %d (%s): unlocking: %s ", \
185 __FILE__, __LINE__, G_STRFUNC, \
187 g_mutex_unlock (&G_LOCK_NAME (name)); \
189 # define G_TRYLOCK(name) \
190 (g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
191 "file %s: line %d (%s): try locking: %s ", \
192 __FILE__, __LINE__, G_STRFUNC, \
193 #name), g_mutex_trylock (&G_LOCK_NAME (name)))
194 #else /* !G_DEBUG_LOCKS */
195 # define G_LOCK(name) g_mutex_lock (&G_LOCK_NAME (name))
196 # define G_UNLOCK(name) g_mutex_unlock (&G_LOCK_NAME (name))
197 # define G_TRYLOCK(name) g_mutex_trylock (&G_LOCK_NAME (name))
198 #endif /* !G_DEBUG_LOCKS */
201 void g_mutex_init (GMutex *mutex);
202 void g_mutex_clear (GMutex *mutex);
204 void g_mutex_lock (GMutex *mutex);
205 void g_mutex_unlock (GMutex *mutex);
206 gboolean g_mutex_trylock (GMutex *mutex);
208 void g_rw_lock_init (GRWLock *rw_lock);
209 void g_rw_lock_clear (GRWLock *rw_lock);
210 void g_rw_lock_writer_lock (GRWLock *rw_lock);
211 gboolean g_rw_lock_writer_trylock (GRWLock *rw_lock);
212 void g_rw_lock_writer_unlock (GRWLock *rw_lock);
213 void g_rw_lock_reader_lock (GRWLock *rw_lock);
214 gboolean g_rw_lock_reader_trylock (GRWLock *rw_lock);
215 void g_rw_lock_reader_unlock (GRWLock *rw_lock);
217 void g_rec_mutex_init (GRecMutex *rec_mutex);
218 void g_rec_mutex_clear (GRecMutex *rec_mutex);
219 void g_rec_mutex_lock (GRecMutex *rec_mutex);
220 gboolean g_rec_mutex_trylock (GRecMutex *rec_mutex);
221 void g_rec_mutex_unlock (GRecMutex *rec_mutex);
223 void g_cond_init (GCond *cond);
224 void g_cond_clear (GCond *cond);
226 void g_cond_wait (GCond *cond,
228 void g_cond_signal (GCond *cond);
229 void g_cond_broadcast (GCond *cond);
230 gboolean g_cond_timed_wait (GCond *cond,
233 gboolean g_cond_timedwait (GCond *cond,
237 gpointer g_private_get (GPrivate *key);
238 void g_private_set (GPrivate *key,
240 void g_private_replace (GPrivate *key,
245 #endif /* __G_THREAD_H__ */