diff options
| -rw-r--r-- | src/refcount.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/refcount.h b/src/refcount.h new file mode 100644 index 000000000..125af5ee0 --- /dev/null +++ b/src/refcount.h @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2003-2009 The Music Player Daemon Project + * http://www.musicpd.org + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** \file + * + * A very simple reference counting library. + */ + +#ifndef MPD_REFCOUNT_H +#define MPD_REFCOUNT_H + +#include <glib.h> + +struct refcount { + gint n; +}; + +static inline void +refcount_init(struct refcount *r) +{ + r->n = 1; +} + +static inline void +refcount_inc(struct refcount *r) +{ + g_atomic_int_inc(&r->n); +} + +/** + * @return true if the number of references has been dropped to 0 + */ +static inline bool +refcount_dec(struct refcount *r) +{ + return g_atomic_int_dec_and_test(&r->n); +} + +#endif |