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authorLennart Poettering <lennart@poettering.net>2006-08-29 01:15:51 +0000
committerLennart Poettering <lennart@poettering.net>2006-08-29 01:15:51 +0000
commit9948cb09a3e1b976ad1705df06ef24216a61bf85 (patch)
treed4c1fe4e255c3756a9fa7d1f11ee4d4d8885057a
parent91d802582362e0d81f291cd4955b278a85528e51 (diff)
add lock-free reference counting macros, based on libatomic-ops
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1341 fefdeb5f-60dc-0310-8127-8f9354f1896f
-rw-r--r--src/Makefile.am4
-rw-r--r--src/pulsecore/refcnt.h41
2 files changed, 44 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index c4988d8e..c9942cff 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -527,7 +527,9 @@ pulsecoreinclude_HEADERS = \
pulsecore/strbuf.h \
pulsecore/tokenizer.h \
pulsecore/creds.h \
- pulsecore/shm.h
+ pulsecore/shm.h \
+ pulsecore/llist.h \
+ pulsecore/refcnt.h
lib_LTLIBRARIES += libpulsecore.la
diff --git a/src/pulsecore/refcnt.h b/src/pulsecore/refcnt.h
new file mode 100644
index 00000000..fade9aa4
--- /dev/null
+++ b/src/pulsecore/refcnt.h
@@ -0,0 +1,41 @@
+#ifndef foopulserefcntfoo
+#define foopulserefcntfoo
+
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio 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.
+
+ PulseAudio 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 Lesser General Public
+ License along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#include <atomic_ops.h>
+
+#define PA_REFCNT_DECLARE volatile AO_t _ref
+
+#define PA_REFCNT_INIT(p) \
+ AO_store_release_write(&(p)->_ref, 1)
+
+#define PA_REFCNT_INC(p) \
+ AO_fetch_and_add1_release_write(&(p)->_ref)
+
+#define PA_REFCNT_DEC(p) \
+ (AO_fetch_and_sub1_release_write(&(p)->_ref)-1)
+
+#define PA_REFCNT_VALUE(p) \
+ AO_load_acquire_read(&(p)->_ref)
+
+#endif