70 lines
2.1 KiB
Plaintext
70 lines
2.1 KiB
Plaintext
// Filename: mutexSpinlockImpl.I
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// Created by: drose (11Apr06)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function: MutexSpinlockImpl::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE MutexSpinlockImpl::
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MutexSpinlockImpl() {
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_lock = 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MutexSpinlockImpl::Destructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE MutexSpinlockImpl::
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~MutexSpinlockImpl() {
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}
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////////////////////////////////////////////////////////////////////
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// Function: MutexSpinlockImpl::lock
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE void MutexSpinlockImpl::
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lock() {
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if (!try_lock()) {
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do_lock();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: MutexSpinlockImpl::try_lock
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE bool MutexSpinlockImpl::
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try_lock() {
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return (AtomicAdjust::compare_and_exchange(_lock, 0, 1) == 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MutexSpinlockImpl::release
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE void MutexSpinlockImpl::
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release() {
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AtomicAdjust::set(_lock, 0);
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}
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