Update of /cvsroot/boost/boost/boost/thread/win32
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv7195
Modified Files:
Tag: thread_rewrite
basic_timed_mutex.hpp
Log Message:
New look read-write mutex
Index: basic_timed_mutex.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/thread/win32/Attic/basic_timed_mutex.hpp,v
retrieving revision 1.1.2.5
retrieving revision 1.1.2.6
diff -u -d -r1.1.2.5 -r1.1.2.6
--- basic_timed_mutex.hpp 5 Oct 2006 07:34:28 -0000 1.1.2.5
+++ basic_timed_mutex.hpp 5 Oct 2006 09:38:21 -0000 1.1.2.6
@@ -9,6 +9,7 @@
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
+#include <boost/assert.hpp>
#include <boost/detail/interlocked.hpp>
#include <boost/thread/win32/thread_primitives.hpp>
#include <boost/thread/win32/interlocked_read.hpp>
@@ -58,40 +59,8 @@
void lock()
{
- long old_count=0;
- while(true)
- {
- long const
current_count=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,(old_count+1)|lock_flag_value,old_count);
- if(current_count==old_count)
- {
- break;
- }
- old_count=current_count;
- }
-
- if(old_count&lock_flag_value)
- {
- bool lock_acquired=false;
- void* const sem=get_semaphore();
- ++old_count; // we're waiting, too
- do
- {
- old_count-=(lock_flag_value+1); // there will be one
less active thread on this mutex when it gets unlocked
- BOOST_WAIT_FOR_SINGLE_OBJECT(sem,BOOST_INFINITE);
- do
- {
- long const
current_count=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,old_count|lock_flag_value,old_count);
- if(current_count==old_count)
- {
- break;
- }
- old_count=current_count;
- }
- while(!(old_count&lock_flag_value));
- lock_acquired=!(old_count&lock_flag_value);
- }
- while(!lock_acquired);
- }
+ bool const
success=timed_lock(::boost::detail::get_xtime_sentinel());
+ BOOST_ASSERT(success);
}
bool timed_lock(::boost::xtime const& target_time)
{
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