1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * gthread.c: posix thread system implementation
5 * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * Modified by the GLib Team and others 1997-1999. See the AUTHORS
25 * file for a list of people on the GLib Team. See the ChangeLog
26 * files for a list of changes. These files are distributed with
27 * GLib at ftp://ftp.gtk.org/pub/gtk/.
37 #ifdef HAVE_SYS_TIME_H
41 #if GLIB_SIZEOF_PTHREAD_T == 2
42 #define PTHREAD_T_CAST_INT gint16
43 #elif GLIB_SIZEOF_PTHREAD_T == 4
44 #define PTHREAD_T_CAST_INT gint32
45 #elif GLIB_SIZEOF_PTHREAD_T == 8 && defined(G_HAVE_GINT64)
46 #define PTHREAD_T_CAST_INT gint64
48 # error This should not happen. Contact the GLib team.
51 #define GPOINTER_TO_PTHREAD_T(x) ((pthread_t)(PTHREAD_T_CAST_INT)(x))
52 #define PTHREAD_T_TO_GPOINTER(x) ((gpointer)(PTHREAD_T_CAST_INT)(x))
54 #define posix_print_error( name, num ) \
55 g_error( "file %s: line %d (%s): error %s during %s", \
56 __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \
57 g_strerror((num)), #name )
59 #if defined(G_THREADS_IMPL_POSIX)
60 # define posix_check_for_error( what ) G_STMT_START{ \
62 if( error ) { posix_print_error( what, error ); } \
64 # define mutexattr_default NULL
65 # define condattr_default NULL
66 #elif defined(G_THREADS_IMPL_DCE)
67 # define posix_check_for_error( what ) G_STMT_START{ \
68 if( (what) == -1 ) { posix_print_error( what, errno ); } \
70 # define pthread_key_create(a, b) pthread_keycreate (a, b)
71 # define pthread_attr_init(a) pthread_attr_create (a)
72 # define pthread_attr_destroy(a) pthread_attr_delete (a)
73 # define pthread_create(a, b, c, d) pthread_create(a, &b, c, d)
74 # define mutexattr_default (&pthread_mutexattr_default)
75 # define condattr_default (&pthread_condattr_default)
76 #else /* neither G_THREADS_IMPL_POSIX nor G_THREADS_IMPL_DCE are defined */
77 # error This should not happen. Contact the GLib team.
80 #define HAVE_G_THREAD_IMPL_INIT
84 g_thread_min_priority = POSIX_MIN_PRIORITY;
85 g_thread_max_priority = POSIX_MAX_PRIORITY;
89 g_mutex_new_posix_impl (void)
91 GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1);
92 posix_check_for_error (pthread_mutex_init ((pthread_mutex_t *) result,
98 g_mutex_free_posix_impl (GMutex * mutex)
100 posix_check_for_error (pthread_mutex_destroy ((pthread_mutex_t *) mutex));
104 /* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use
105 functions from gmem.c and gmessages.c; */
107 /* pthread_mutex_lock, pthread_mutex_unlock can be taken directly, as
108 signature and semantic are right, but without error check then!!!!,
109 we might want to change this therefore. */
112 g_mutex_trylock_posix_impl (GMutex * mutex)
116 result = pthread_mutex_trylock ((pthread_mutex_t *) mutex);
118 #ifdef G_THREADS_IMPL_POSIX
121 #else /* G_THREADS_IMPL_DCE */
126 posix_check_for_error (result);
131 g_cond_new_posix_impl (void)
133 GCond *result = (GCond *) g_new (pthread_cond_t, 1);
134 posix_check_for_error (pthread_cond_init ((pthread_cond_t *) result,
139 /* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait
140 can be taken directly, as signature and semantic are right, but
141 without error check then!!!!, we might want to change this
144 #define G_MICROSEC 1000000
145 #define G_NANOSEC 1000000000
148 g_cond_timed_wait_posix_impl (GCond * cond,
149 GMutex * entered_mutex,
153 struct timespec end_time;
156 g_return_val_if_fail (cond != NULL, FALSE);
157 g_return_val_if_fail (entered_mutex != NULL, FALSE);
161 g_cond_wait (cond, entered_mutex);
165 end_time.tv_sec = abs_time->tv_sec;
166 end_time.tv_nsec = abs_time->tv_usec * (G_NANOSEC / G_MICROSEC);
167 g_assert (end_time.tv_nsec < G_NANOSEC);
168 result = pthread_cond_timedwait ((pthread_cond_t *) cond,
169 (pthread_mutex_t *) entered_mutex,
172 #ifdef G_THREADS_IMPL_POSIX
173 timed_out = (result == ETIMEDOUT);
174 #else /* G_THREADS_IMPL_DCE */
175 timed_out = (result == -1) && (errno = EAGAIN);
179 posix_check_for_error (result);
184 g_cond_free_posix_impl (GCond * cond)
186 posix_check_for_error (pthread_cond_destroy ((pthread_cond_t *) cond));
191 g_private_new_posix_impl (GDestroyNotify destructor)
193 GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1);
194 posix_check_for_error (pthread_key_create ((pthread_key_t *) result,
199 /* NOTE: the functions g_private_get and g_private_set may not use
200 functions from gmem.c and gmessages.c */
203 g_private_set_posix_impl (GPrivate * private_key, gpointer value)
207 pthread_setspecific (*(pthread_key_t *) private_key, value);
211 g_private_get_posix_impl (GPrivate * private_key)
215 #ifdef G_THREADS_IMPL_POSIX
216 return pthread_getspecific (*(pthread_key_t *) private_key);
217 #else /* G_THREADS_IMPL_DCE */
220 posix_check_for_error (pthread_getspecific (*(pthread_key_t *)
221 private_key, &data));
228 g_thread_create_posix_impl (GThreadFunc thread_func,
233 GThreadPriority priority)
237 struct sched_param sched;
239 g_return_val_if_fail (thread_func, NULL);
241 posix_check_for_error (pthread_attr_init (&attr));
243 #ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
245 posix_check_for_error (pthread_attr_setstacksize (&attr, stack_size));
246 #endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */
248 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
250 posix_check_for_error (pthread_attr_setscope (&attr,
251 PTHREAD_SCOPE_SYSTEM));
254 posix_check_for_error( pthread_attr_setdetachstate( &attr,
255 joinable ? PTHREAD_CREATE_JOINABLE : PTHREAD_CREATE_DETACHED ) );
257 #ifdef G_THREADS_IMPL_POSIX
258 posix_check_for_error (pthread_attr_getschedparam (&attr, &sched));
259 sched.sched_priority = g_thread_map_priority (priority);
260 posix_check_for_error (pthread_attr_setschedparam (&attr, &sched));
261 #else /* G_THREADS_IMPL_DCE */
262 posix_check_for_error
263 (pthread_attr_setprio (&attr, g_thread_map_priority (priority));
266 posix_check_for_error( pthread_create (&thread, &attr,
267 (void* (*)(void*))thread_func,
270 posix_check_for_error( pthread_attr_destroy (&attr) );
272 return PTHREAD_T_TO_GPOINTER (thread);
276 g_thread_yield_posix_impl (void)
282 g_thread_join_posix_impl (gpointer thread)
285 posix_check_for_error (pthread_join (GPOINTER_TO_PTHREAD_T (thread),
290 g_thread_exit_posix_impl (void)
296 g_thread_set_priority_posix_impl (gpointer thread, GThreadPriority priority)
298 struct sched_param sched;
301 #ifdef G_THREADS_IMPL_POSIX
302 posix_check_for_error (pthread_getschedparam (GPOINTER_TO_PTHREAD_T (thread),
304 sched.sched_priority = g_thread_map_priority (priority);
305 posix_check_for_error (pthread_setschedparam (GPOINTER_TO_PTHREAD_T (thread),
307 #else /* G_THREADS_IMPL_DCE */
308 posix_check_for_error (pthread_setprio (GPOINTER_TO_PTHREAD_T (thread),
309 g_thread_map_priority (priority)));
314 static GThreadFunctions g_thread_functions_for_glib_use_default =
316 g_mutex_new_posix_impl,
317 (void (*)(GMutex *)) pthread_mutex_lock,
318 g_mutex_trylock_posix_impl,
319 (void (*)(GMutex *)) pthread_mutex_unlock,
320 g_mutex_free_posix_impl,
321 g_cond_new_posix_impl,
322 (void (*)(GCond *)) pthread_cond_signal,
323 (void (*)(GCond *)) pthread_cond_broadcast,
324 (void (*)(GCond *, GMutex *)) pthread_cond_wait,
325 g_cond_timed_wait_posix_impl,
326 g_cond_free_posix_impl,
327 g_private_new_posix_impl,
328 g_private_get_posix_impl,
329 g_private_set_posix_impl,
330 g_thread_create_posix_impl,
331 g_thread_yield_posix_impl,
332 g_thread_join_posix_impl,
333 g_thread_exit_posix_impl,
334 g_thread_set_priority_posix_impl,
335 (gpointer (*)())pthread_self