summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to '3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp')
-rw-r--r--3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp96
1 files changed, 96 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp b/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp
new file mode 100644
index 0000000..05f7867
--- /dev/null
+++ b/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp
@@ -0,0 +1,96 @@
+#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED
+
+//
+// boost/detail/atomic_count_pthreads.hpp
+//
+// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
+//
+// 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)
+//
+
+#include <pthread.h>
+
+//
+// The generic pthread_mutex-based implementation sometimes leads to
+// inefficiencies. Example: a class with two atomic_count members
+// can get away with a single mutex.
+//
+// Users can detect this situation by checking BOOST_AC_USE_PTHREADS.
+//
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+private:
+
+ class scoped_lock
+ {
+ public:
+
+ scoped_lock(pthread_mutex_t & m): m_(m)
+ {
+ pthread_mutex_lock(&m_);
+ }
+
+ ~scoped_lock()
+ {
+ pthread_mutex_unlock(&m_);
+ }
+
+ private:
+
+ pthread_mutex_t & m_;
+ };
+
+public:
+
+ explicit atomic_count(long v): value_(v)
+ {
+ pthread_mutex_init(&mutex_, 0);
+ }
+
+ ~atomic_count()
+ {
+ pthread_mutex_destroy(&mutex_);
+ }
+
+ long operator++()
+ {
+ scoped_lock lock(mutex_);
+ return ++value_;
+ }
+
+ long operator--()
+ {
+ scoped_lock lock(mutex_);
+ return --value_;
+ }
+
+ operator long() const
+ {
+ scoped_lock lock(mutex_);
+ return value_;
+ }
+
+private:
+
+ atomic_count(atomic_count const &);
+ atomic_count & operator=(atomic_count const &);
+
+ mutable pthread_mutex_t mutex_;
+ long value_;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED