diff options
Diffstat (limited to 'glib-1.2.10/gthread/gthread-posix.c')
| -rw-r--r-- | glib-1.2.10/gthread/gthread-posix.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/glib-1.2.10/gthread/gthread-posix.c b/glib-1.2.10/gthread/gthread-posix.c new file mode 100644 index 0000000..a62ab91 --- /dev/null +++ b/glib-1.2.10/gthread/gthread-posix.c @@ -0,0 +1,200 @@ +/* GLIB - Library of useful routines for C programming + * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + * + * gthread.c: posix thread system implementation + * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * Modified by the GLib Team and others 1997-1999. See the AUTHORS + * file for a list of people on the GLib Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GLib at ftp://ftp.gtk.org/pub/gtk/. + */ + +/* + * MT safe + */ + +#include <pthread.h> +#include <errno.h> +#include <stdlib.h> +#ifdef HAVE_SYS_TIME_H +#include <sys/time.h> +#endif + +#define posix_print_error( name, num ) \ + g_error( "file %s: line %d (%s): error %s during %s", \ + __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ + g_strerror((num)), #name ) + +#define posix_check_for_error( what ) G_STMT_START{ \ + int error = (what); \ + if( error ) { posix_print_error( what, error ); } \ + }G_STMT_END + +static GMutex * +g_mutex_new_posix_impl (void) +{ + GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1); + posix_check_for_error (pthread_mutex_init ((pthread_mutex_t *) result, NULL)); + return result; +} + +static void +g_mutex_free_posix_impl (GMutex * mutex) +{ + posix_check_for_error (pthread_mutex_destroy ((pthread_mutex_t *) mutex)); + g_free (mutex); +} + +/* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use + functions from gmem.c and gmessages.c; */ + +/* pthread_mutex_lock, pthread_mutex_unlock can be taken directly, as + signature and semantic are right, but without error check then!!!!, + we might want to change this therefore. */ + +static gboolean +g_mutex_trylock_posix_impl (GMutex * mutex) +{ + int result; + + result = pthread_mutex_trylock ((pthread_mutex_t *) mutex); +#ifdef HAVE_PTHREAD_MUTEX_TRYLOCK_POSIX + if (result == EBUSY) + return FALSE; + posix_check_for_error (result); +#else + if (result == 0) + return FALSE; +#endif + return TRUE; +} + +static GCond * +g_cond_new_posix_impl (void) +{ + GCond *result = (GCond *) g_new (pthread_cond_t, 1); + posix_check_for_error (pthread_cond_init ((pthread_cond_t *) result, NULL)); + return result; +} + +/* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait + can be taken directly, as signature and semantic are right, but + without error check then!!!!, we might want to change this + therfore. */ + +#define G_MICROSEC 1000000 +#define G_NANOSEC 1000000000 + +static gboolean +g_cond_timed_wait_posix_impl (GCond * cond, + GMutex * entered_mutex, + GTimeVal * abs_time) +{ + int result; + struct timespec end_time; + gboolean timed_out; + + g_return_val_if_fail (cond != NULL, FALSE); + g_return_val_if_fail (entered_mutex != NULL, FALSE); + + if (!abs_time) + { + g_cond_wait (cond, entered_mutex); + return TRUE; + } + + end_time.tv_sec = abs_time->tv_sec; + end_time.tv_nsec = abs_time->tv_usec * (G_NANOSEC / G_MICROSEC); + g_assert (end_time.tv_nsec < G_NANOSEC); + result = pthread_cond_timedwait ((pthread_cond_t *) cond, + (pthread_mutex_t *) entered_mutex, + &end_time); +#ifdef HAVE_PTHREAD_COND_TIMEDWAIT_POSIX + timed_out = (result == ETIMEDOUT); +#else + timed_out = (result == -1 && errno == EAGAIN); +#endif + if (!timed_out) + posix_check_for_error (result); + return !timed_out; +} + +static void +g_cond_free_posix_impl (GCond * cond) +{ + posix_check_for_error (pthread_cond_destroy ((pthread_cond_t *) cond)); + g_free (cond); +} + +static GPrivate * +g_private_new_posix_impl (GDestroyNotify destructor) +{ + GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1); + posix_check_for_error (pthread_key_create ((pthread_key_t *) result, + destructor)); + return result; +} + +/* NOTE: the functions g_private_get and g_private_set may not use + functions from gmem.c and gmessages.c */ + +static void +g_private_set_posix_impl (GPrivate * private_key, gpointer value) +{ + if (!private_key) + return; + + pthread_setspecific (*(pthread_key_t *) private_key, value); +} + +static gpointer +g_private_get_posix_impl (GPrivate * private_key) +{ + if (!private_key) + return NULL; +#ifdef HAVE_PTHREAD_GETSPECIFIC_POSIX + return pthread_getspecific (*(pthread_key_t *) private_key); +#else /* HAVE_PTHREAD_GETSPECIFIC_POSIX */ + { + void* data; + pthread_getspecific (*(pthread_key_t *) private_key, &data); + return data; + } +#endif /* HAVE_PTHREAD_GETSPECIFIC_POSIX */ +} + +static GThreadFunctions g_thread_functions_for_glib_use_default = +{ + g_mutex_new_posix_impl, + (void (*)(GMutex *)) pthread_mutex_lock, + g_mutex_trylock_posix_impl, + (void (*)(GMutex *)) pthread_mutex_unlock, + g_mutex_free_posix_impl, + g_cond_new_posix_impl, + (void (*)(GCond *)) pthread_cond_signal, + (void (*)(GCond *)) pthread_cond_broadcast, + (void (*)(GCond *, GMutex *)) pthread_cond_wait, + g_cond_timed_wait_posix_impl, + g_cond_free_posix_impl, + g_private_new_posix_impl, + g_private_get_posix_impl, + g_private_set_posix_impl +}; |