MPD 0.17~git
|
00001 /* 00002 * Copyright (C) 2003-2011 The Music Player Daemon Project 00003 * http://www.musicpd.org 00004 * 00005 * This program is free software; you can redistribute it and/or modify 00006 * it under the terms of the GNU General Public License as published by 00007 * the Free Software Foundation; either version 2 of the License, or 00008 * (at your option) any later version. 00009 * 00010 * This program is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 * GNU General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU General Public License along 00016 * with this program; if not, write to the Free Software Foundation, Inc., 00017 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 00018 */ 00019 00026 #ifndef MPD_DB_LOCK_H 00027 #define MPD_DB_LOCK_H 00028 00029 #include "check.h" 00030 00031 #include <glib.h> 00032 #include <assert.h> 00033 #include <stdbool.h> 00034 00035 extern GStaticMutex db_mutex; 00036 00037 #ifndef NDEBUG 00038 00039 extern GThread *db_mutex_holder; 00040 00044 G_GNUC_PURE 00045 static inline bool 00046 holding_db_lock(void) 00047 { 00048 return db_mutex_holder == g_thread_self(); 00049 } 00050 00051 #endif 00052 00057 static inline void 00058 db_lock(void) 00059 { 00060 assert(!holding_db_lock()); 00061 00062 g_static_mutex_lock(&db_mutex); 00063 00064 assert(db_mutex_holder == NULL); 00065 #ifndef NDEBUG 00066 db_mutex_holder = g_thread_self(); 00067 #endif 00068 } 00069 00073 static inline void 00074 db_unlock(void) 00075 { 00076 assert(holding_db_lock()); 00077 #ifndef NDEBUG 00078 db_mutex_holder = NULL; 00079 #endif 00080 00081 g_static_mutex_unlock(&db_mutex); 00082 } 00083 00084 #endif