void operator()( tbb::blocked_range<size_t>& range ) const {
typename M::scoped_lock lock2;
for( size_t i=range.begin(); i!=range.end(); ++i ) {
if( i&1 ) {
typename M::scoped_lock lock1(my_mutex, true) ;
if( lock1.downgrade_to_reader()==false )
REPORT("ERROR for %s: downgrade should always succeed\n", name);
} else {
lock2.acquire( my_mutex, false );
if( lock2.upgrade_to_writer()==false )
REPORT("ERROR for %s: upgrade should always succeed\n", name);
lock2.release();
}
}
}
void TestTryAcquireReader_OneThread( const char * mutex_name ) {
M tested_mutex;
typename M::scoped_lock lock1;
if( M::is_rw_mutex ) {
if( lock1.try_acquire(tested_mutex, false) )
lock1.release();
else
REPORT("ERROR for %s: try_acquire failed though it should not\n", mutex_name);
{
typename M::scoped_lock lock2(tested_mutex, false);
if( lock1.try_acquire(tested_mutex) )
REPORT("ERROR for %s: try_acquire succeeded though it should not\n", mutex_name);
lock2.release();
lock2.acquire(tested_mutex, true);
if( lock1.try_acquire(tested_mutex, false) )
REPORT("ERROR for %s: try_acquire succeeded though it should not\n", mutex_name);
}
if( lock1.try_acquire(tested_mutex, false) )
lock1.release();
else
REPORT("ERROR for %s: try_acquire failed though it should not\n", mutex_name);
}
}