From 9948cb09a3e1b976ad1705df06ef24216a61bf85 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 29 Aug 2006 01:15:51 +0000 Subject: 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 --- src/Makefile.am | 4 +++- src/pulsecore/refcnt.h | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+), 1 deletion(-) create mode 100644 src/pulsecore/refcnt.h 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 + +#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 -- cgit