MPD 0.17~git
src/refcount.h
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00001 /*
00002  * Copyright (C) 2003-2011 The Music Player Daemon Project
00003  * http://www.musicpd.org
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  * notice, this list of conditions and the following disclaimer.
00011  *
00012  * - Redistributions in binary form must reproduce the above copyright
00013  * notice, this list of conditions and the following disclaimer in the
00014  * documentation and/or other materials provided with the
00015  * distribution.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00018  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00019  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00020  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
00021  * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00022  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00023  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00024  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00025  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
00026  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00027  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
00028  * OF THE POSSIBILITY OF SUCH DAMAGE.
00029  */
00030 
00036 #ifndef MPD_REFCOUNT_H
00037 #define MPD_REFCOUNT_H
00038 
00039 #include <glib.h>
00040 #include <stdbool.h>
00041 
00042 struct refcount {
00043         gint n;
00044 };
00045 
00046 static inline void
00047 refcount_init(struct refcount *r)
00048 {
00049         r->n = 1;
00050 }
00051 
00052 static inline void
00053 refcount_inc(struct refcount *r)
00054 {
00055         g_atomic_int_inc(&r->n);
00056 }
00057 
00061 static inline bool
00062 refcount_dec(struct refcount *r)
00063 {
00064         return g_atomic_int_dec_and_test(&r->n);
00065 }
00066 
00067 #endif