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/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 1997-2000. 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/.
*/
#if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
#error "Only <glib.h> can be included directly."
#endif
#ifndef __G_THREAD_H__
#define __G_THREAD_H__
#include <glib/gerror.h>
#include <glib/gutils.h> /* for G_INLINE_FUNC */
#include <glib/gatomic.h> /* for g_atomic_pointer_get */
G_BEGIN_DECLS
/* GLib Thread support
*/
extern GQuark g_thread_error_quark (void);
#define G_THREAD_ERROR g_thread_error_quark ()
typedef enum
{
G_THREAD_ERROR_AGAIN /* Resource temporarily unavailable */
} GThreadError;
typedef gpointer (*GThreadFunc) (gpointer data);
typedef struct _GThread GThread;
typedef struct _GMutex GMutex;
typedef struct _GRecMutex GRecMutex;
typedef struct _GRWLock GRWLock;
typedef struct _GCond GCond;
typedef struct _GPrivate GPrivate;
typedef struct _GStaticPrivate GStaticPrivate;
#ifdef G_OS_WIN32
#define G_MUTEX_INIT { NULL }
struct _GMutex
{
gpointer impl;
};
#define G_RW_LOCK_INIT { NULL }
struct _GRWLock
{
gpointer impl;
};
#define G_COND_INIT { NULL }
struct _GCond
{
gpointer impl;
};
#else
#include <pthread.h>
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
#define G_MUTEX_INIT { PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP }
#else
#define G_MUTEX_INIT { PTHREAD_MUTEX_INITIALIZER }
#endif
struct _GMutex
{
pthread_mutex_t impl;
};
#define G_RW_LOCK_INIT { PTHREAD_RWLOCK_INITIALIZER }
struct _GRWLock
{
pthread_rwlock_t impl;
};
#define G_COND_INIT { PTHREAD_COND_INITIALIZER }
struct _GCond
{
pthread_cond_t impl;
};
#endif
#define G_REC_MUTEX_INIT { NULL }
struct _GRecMutex
{
gpointer impl;
};
#define G_PRIVATE_INIT(notify) { NULL, (notify), { NULL, NULL } }
struct _GPrivate
{
gpointer p;
GDestroyNotify notify;
gpointer future[2];
};
void g_thread_init (gpointer vtable);
gboolean g_thread_get_initialized (void);
GLIB_VAR gboolean g_threads_got_initialized;
#if defined(G_THREADS_MANDATORY)
#define g_thread_supported() 1
#else
#define g_thread_supported() (g_threads_got_initialized)
#endif
GMutex* g_static_mutex_get_mutex_impl (GMutex **mutex);
GThread *g_thread_create (GThreadFunc func,
gpointer data,
gboolean joinable,
GError **error);
GThread *g_thread_create_with_stack_size (GThreadFunc func,
gpointer data,
gboolean joinable,
gsize stack_size,
GError **error);
GThread* g_thread_self (void);
void g_thread_exit (gpointer retval);
gpointer g_thread_join (GThread *thread);
void g_thread_yield (void);
void g_thread_foreach (GFunc thread_func,
gpointer user_data);
struct _GStaticPrivate
{
/*< private >*/
guint index;
};
#define G_STATIC_PRIVATE_INIT { 0 }
void g_static_private_init (GStaticPrivate *private_key);
gpointer g_static_private_get (GStaticPrivate *private_key);
void g_static_private_set (GStaticPrivate *private_key,
gpointer data,
GDestroyNotify notify);
void g_static_private_free (GStaticPrivate *private_key);
typedef enum
{
G_ONCE_STATUS_NOTCALLED,
G_ONCE_STATUS_PROGRESS,
G_ONCE_STATUS_READY
} GOnceStatus;
typedef struct _GOnce GOnce;
struct _GOnce
{
volatile GOnceStatus status;
volatile gpointer retval;
};
#define G_ONCE_INIT { G_ONCE_STATUS_NOTCALLED, NULL }
gpointer g_once_impl (GOnce *once, GThreadFunc func, gpointer arg);
#ifdef G_ATOMIC_OP_MEMORY_BARRIER_NEEDED
# define g_once(once, func, arg) g_once_impl ((once), (func), (arg))
#else /* !G_ATOMIC_OP_MEMORY_BARRIER_NEEDED*/
# define g_once(once, func, arg) \
(((once)->status == G_ONCE_STATUS_READY) ? \
(once)->retval : \
g_once_impl ((once), (func), (arg)))
#endif /* G_ATOMIC_OP_MEMORY_BARRIER_NEEDED */
/* initialize-once guards, keyed by value_location */
G_INLINE_FUNC gboolean g_once_init_enter (volatile gsize *value_location);
gboolean g_once_init_enter_impl (volatile gsize *value_location);
void g_once_init_leave (volatile gsize *value_location,
gsize initialization_value);
#if defined (G_CAN_INLINE) || defined (__G_THREAD_C__)
G_INLINE_FUNC gboolean
g_once_init_enter (volatile gsize *value_location)
{
if G_LIKELY ((gpointer) g_atomic_pointer_get (value_location) != NULL)
return FALSE;
else
return g_once_init_enter_impl (value_location);
}
#endif /* G_CAN_INLINE || __G_THREAD_C__ */
#define G_LOCK_NAME(name) g__ ## name ## _lock
#define G_LOCK_DEFINE_STATIC(name) static G_LOCK_DEFINE (name)
#define G_LOCK_DEFINE(name) \
GMutex G_LOCK_NAME (name) = G_MUTEX_INIT
#define G_LOCK_EXTERN(name) extern GMutex G_LOCK_NAME (name)
#ifdef G_DEBUG_LOCKS
# define G_LOCK(name) G_STMT_START{ \
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
"file %s: line %d (%s): locking: %s ", \
__FILE__, __LINE__, G_STRFUNC, \
#name); \
g_mutex_lock (&G_LOCK_NAME (name)); \
}G_STMT_END
# define G_UNLOCK(name) G_STMT_START{ \
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
"file %s: line %d (%s): unlocking: %s ", \
__FILE__, __LINE__, G_STRFUNC, \
#name); \
g_mutex_unlock (&G_LOCK_NAME (name)); \
}G_STMT_END
# define G_TRYLOCK(name) \
(g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
"file %s: line %d (%s): try locking: %s ", \
__FILE__, __LINE__, G_STRFUNC, \
#name), g_mutex_trylock (&G_LOCK_NAME (name)))
#else /* !G_DEBUG_LOCKS */
# define G_LOCK(name) g_mutex_lock (&G_LOCK_NAME (name))
# define G_UNLOCK(name) g_mutex_unlock (&G_LOCK_NAME (name))
# define G_TRYLOCK(name) g_mutex_trylock (&G_LOCK_NAME (name))
#endif /* !G_DEBUG_LOCKS */
GMutex * g_mutex_new (void);
void g_mutex_free (GMutex *mutex);
void g_mutex_init (GMutex *mutex);
void g_mutex_clear (GMutex *mutex);
void g_mutex_lock (GMutex *mutex);
void g_mutex_unlock (GMutex *mutex);
gboolean g_mutex_trylock (GMutex *mutex);
void g_rw_lock_init (GRWLock *lock);
void g_rw_lock_clear (GRWLock *lock);
void g_rw_lock_writer_lock (GRWLock *lock);
gboolean g_rw_lock_writer_trylock (GRWLock *lock);
void g_rw_lock_writer_unlock (GRWLock *lock);
void g_rw_lock_reader_lock (GRWLock *lock);
gboolean g_rw_lock_reader_trylock (GRWLock *lock);
void g_rw_lock_reader_unlock (GRWLock *lock);
void g_rec_mutex_init (GRecMutex *rec_mutex);
void g_rec_mutex_clear (GRecMutex *rec_mutex);
void g_rec_mutex_lock (GRecMutex *rec_mutex);
gboolean g_rec_mutex_trylock (GRecMutex *rec_mutex);
void g_rec_mutex_unlock (GRecMutex *rec_mutex);
GCond * g_cond_new (void);
void g_cond_free (GCond *cond);
void g_cond_init (GCond *cond);
void g_cond_clear (GCond *cond);
void g_cond_wait (GCond *cond,
GMutex *mutex);
void g_cond_signal (GCond *cond);
void g_cond_broadcast (GCond *cond);
gboolean g_cond_timed_wait (GCond *cond,
GMutex *mutex,
GTimeVal *timeval);
gboolean g_cond_timedwait (GCond *cond,
GMutex *mutex,
gint64 abs_time);
gpointer g_private_get (GPrivate *key);
void g_private_set (GPrivate *key,
gpointer value);
void g_private_replace (GPrivate *key,
gpointer value);
G_END_DECLS
#endif /* __G_THREAD_H__ */
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