00001 // Filename: mutexSpinlockImpl.cxx 00002 // Created by: drose (11Apr06) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #include "selectThreadImpl.h" 00016 00017 #ifdef MUTEX_SPINLOCK 00018 00019 #include "mutexSpinlockImpl.h" 00020 00021 //////////////////////////////////////////////////////////////////// 00022 // Function: MutexSpinlockImpl::do_lock 00023 // Access: Private 00024 // Description: 00025 //////////////////////////////////////////////////////////////////// 00026 void MutexSpinlockImpl:: 00027 do_lock() { 00028 while (AtomicAdjust::compare_and_exchange(_lock, 0, 1) != 0) { 00029 } 00030 } 00031 00032 #endif // MUTEX_SPINLOCK