From 0b806ee0fc9097fa7bda7ac0109191c9c5e0a1ac Mon Sep 17 00:00:00 2001 From: Juan Linietsky Date: Sun, 9 Feb 2014 22:10:30 -0300 Subject: GODOT IS OPEN SOURCE --- core/safe_refcount.cpp | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 core/safe_refcount.cpp (limited to 'core/safe_refcount.cpp') diff --git a/core/safe_refcount.cpp b/core/safe_refcount.cpp new file mode 100644 index 0000000000..3d867448e8 --- /dev/null +++ b/core/safe_refcount.cpp @@ -0,0 +1,55 @@ +/*************************************************************************/ +/* safe_refcount.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ +#include "safe_refcount.h" + + +#ifdef _MSC_VER + +// don't pollute my namespace! +#include +long atomic_conditional_increment( register long * pw ) { + + /* try to increment until it actually works */ + // taken from boost + + while (true) { + long tmp = static_cast< long const volatile& >( *pw ); + if( tmp == 0 ) + return 0; // if zero, can't add to it anymore + if( InterlockedCompareExchange( pw, tmp + 1, tmp ) == tmp ) + return tmp+1; + } + +} + +long atomic_decrement( register long * pw ) { + return InterlockedDecrement( pw ); +} + +#endif -- cgit v1.2.3