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author | Max Kellermann <max@duempel.org> | 2013-01-02 20:56:21 +0100 |
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committer | Max Kellermann <max@duempel.org> | 2013-01-02 20:56:21 +0100 |
commit | 51a2d09eb7fd8bc22a25e151878e6809b58bc21f (patch) | |
tree | 64f87cab1f5d55a219fc3c9d3d2dac5d65e0aba5 /src/db_lock.h | |
parent | 22f0ef6d6b2d2c66def0e0e93442b01089e388e9 (diff) | |
download | mpd-51a2d09eb7fd8bc22a25e151878e6809b58bc21f.tar.gz mpd-51a2d09eb7fd8bc22a25e151878e6809b58bc21f.tar.xz mpd-51a2d09eb7fd8bc22a25e151878e6809b58bc21f.zip |
db_lock: convert to C++
Diffstat (limited to 'src/db_lock.h')
-rw-r--r-- | src/db_lock.h | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/src/db_lock.h b/src/db_lock.h deleted file mode 100644 index eed71eec0..000000000 --- a/src/db_lock.h +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/** \file - * - * Support for locking data structures from the database, for safe - * multi-threading. - */ - -#ifndef MPD_DB_LOCK_H -#define MPD_DB_LOCK_H - -#include "check.h" - -#include <glib.h> -#include <assert.h> -#include <stdbool.h> - -extern GStaticMutex db_mutex; - -#ifndef NDEBUG - -extern GThread *db_mutex_holder; - -/** - * Does the current thread hold the database lock? - */ -G_GNUC_PURE -static inline bool -holding_db_lock(void) -{ - return db_mutex_holder == g_thread_self(); -} - -#endif - -/** - * Obtain the global database lock. This is needed before - * dereferencing a #song or #directory. It is not recursive. - */ -static inline void -db_lock(void) -{ - assert(!holding_db_lock()); - - g_static_mutex_lock(&db_mutex); - - assert(db_mutex_holder == NULL); -#ifndef NDEBUG - db_mutex_holder = g_thread_self(); -#endif -} - -/** - * Release the global database lock. - */ -static inline void -db_unlock(void) -{ - assert(holding_db_lock()); -#ifndef NDEBUG - db_mutex_holder = NULL; -#endif - - g_static_mutex_unlock(&db_mutex); -} - -#ifdef __cplusplus - -class ScopeDatabaseLock { -public: - ScopeDatabaseLock() { - db_lock(); - } - - ~ScopeDatabaseLock() { - db_unlock(); - } -}; - -#endif - -#endif |