/* It was found that on IPF inlining of __TBB_machine_lockbyte leads
to serious performance regression with ICC 10.0. So keep it out-of-line.
This code is copy-pasted from tbb_misc.cpp.
*/
extern "C" intptr_t __TBB_machine_lockbyte( volatile unsigned char& flag ) {
if ( !__TBB_TryLockByte(flag) ) {
tbb::internal::atomic_backoff b;
do {
b.pause();
} while ( !__TBB_TryLockByte(flag) );
}
return 0;
}
bool spin_mutex::scoped_lock::internal_try_acquire( spin_mutex& m ) {
__TBB_ASSERT( !my_mutex, "already holding a lock on a spin_mutex" );
bool result = bool( __TBB_TryLockByte(m.flag) );
if( result ) {
my_mutex = &m;
ITT_NOTIFY(sync_acquired, &m);
}
return result;
}
