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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/libs/thread/src/pthread/once.cpp
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Import.
Diffstat (limited to '3rdParty/Boost/libs/thread/src/pthread/once.cpp')
-rw-r--r--3rdParty/Boost/libs/thread/src/pthread/once.cpp51
1 files changed, 51 insertions, 0 deletions
diff --git a/3rdParty/Boost/libs/thread/src/pthread/once.cpp b/3rdParty/Boost/libs/thread/src/pthread/once.cpp
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+++ b/3rdParty/Boost/libs/thread/src/pthread/once.cpp
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+// Copyright (C) 2007 Anthony Williams
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#define __STDC_CONSTANT_MACROS
+#include <boost/thread/once.hpp>
+#include <boost/assert.hpp>
+#include <pthread.h>
+#include <stdlib.h>
+
+namespace boost
+{
+ namespace detail
+ {
+ BOOST_THREAD_DECL boost::uintmax_t once_global_epoch=UINTMAX_C(~0);
+ BOOST_THREAD_DECL pthread_mutex_t once_epoch_mutex=PTHREAD_MUTEX_INITIALIZER;
+ BOOST_THREAD_DECL pthread_cond_t once_epoch_cv = PTHREAD_COND_INITIALIZER;
+
+ namespace
+ {
+ pthread_key_t epoch_tss_key;
+ pthread_once_t epoch_tss_key_flag=PTHREAD_ONCE_INIT;
+
+ extern "C" void delete_epoch_tss_data(void* data)
+ {
+ free(data);
+ }
+
+ extern "C" void create_epoch_tss_key()
+ {
+ BOOST_VERIFY(!pthread_key_create(&epoch_tss_key,delete_epoch_tss_data));
+ }
+
+ }
+
+ boost::uintmax_t& get_once_per_thread_epoch()
+ {
+ BOOST_VERIFY(!pthread_once(&epoch_tss_key_flag,create_epoch_tss_key));
+ void* data=pthread_getspecific(epoch_tss_key);
+ if(!data)
+ {
+ data=malloc(sizeof(boost::uintmax_t));
+ BOOST_VERIFY(!pthread_setspecific(epoch_tss_key,data));
+ *static_cast<boost::uintmax_t*>(data)=UINTMAX_C(~0);
+ }
+ return *static_cast<boost::uintmax_t*>(data);
+ }
+ }
+
+}