66 lines
2.6 KiB
Plaintext
66 lines
2.6 KiB
Plaintext
// Filename: atomicAdjustWin32Impl.I
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// Created by: drose (07Feb06)
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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: AtomicAdjustWin32Impl::inc
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// Access: Public, Static
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// Description: Atomically increments the indicated variable.
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////////////////////////////////////////////////////////////////////
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INLINE void AtomicAdjustWin32Impl::
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inc(PN_int32 &var) {
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InterlockedIncrement((LONG *)&var);
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}
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////////////////////////////////////////////////////////////////////
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// Function: AtomicAdjustWin32Impl::dec
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// Access: Public, Static
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// Description: Atomically decrements the indicated variable and
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// returns true if the new value is nonzero, false if it
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// is zero.
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////////////////////////////////////////////////////////////////////
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INLINE bool AtomicAdjustWin32Impl::
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dec(PN_int32 &var) {
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return (InterlockedDecrement((LONG *)&var) != 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: AtomicAdjustWin32Impl::set
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// Access: Public, Static
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// Description: Atomically changes the indicated variable and
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// returns the original value.
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////////////////////////////////////////////////////////////////////
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INLINE PN_int32 AtomicAdjustWin32Impl::
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set(PN_int32 &var, PN_int32 new_value) {
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return InterlockedExchange((LONG *)&var, new_value);
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}
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////////////////////////////////////////////////////////////////////
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// Function: AtomicAdjustWin32Impl::get
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// Access: Public, Static
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// Description: Atomically retrieves the snapshot value of the
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// indicated variable. This is the only guaranteed safe
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// way to retrieve the value that other threads might be
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// asynchronously setting, incrementing, or decrementing
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// (via other AtomicAjust methods).
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////////////////////////////////////////////////////////////////////
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INLINE PN_int32 AtomicAdjustWin32Impl::
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get(const PN_int32 &var) {
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return var;
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}
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