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mem_block_cache.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\regex\v4\mem_block_cache.hpp
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/* * Copyright (c) 2002 * John Maddock * * Use, modification and distribution are subject to the * Boost Software License, Version 1.0. (See accompanying file * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) * */ /* * LOCATION: see http://www.boost.org for most recent version. * FILE mem_block_cache.hpp * VERSION see
* DESCRIPTION: memory block cache used by the non-recursive matcher. */ #ifndef BOOST_REGEX_V4_MEM_BLOCK_CACHE_HPP #define BOOST_REGEX_V4_MEM_BLOCK_CACHE_HPP #include
#ifdef BOOST_HAS_THREADS #include
#endif #ifdef BOOST_HAS_ABI_HEADERS # include BOOST_ABI_PREFIX #endif namespace boost{ namespace re_detail{ struct mem_block_node { mem_block_node* next; }; struct mem_block_cache { // this member has to be statically initialsed: mem_block_node* next; unsigned cached_blocks; #ifdef BOOST_HAS_THREADS boost::static_mutex mut; #endif ~mem_block_cache() { while(next) { mem_block_node* old = next; next = next->next; ::operator delete(old); } } void* get() { #ifdef BOOST_HAS_THREADS boost::static_mutex::scoped_lock g(mut); #endif if(next) { mem_block_node* result = next; next = next->next; --cached_blocks; return result; } return ::operator new(BOOST_REGEX_BLOCKSIZE); } void put(void* p) { #ifdef BOOST_HAS_THREADS boost::static_mutex::scoped_lock g(mut); #endif if(cached_blocks >= BOOST_REGEX_MAX_CACHE_BLOCKS) { ::operator delete(p); } else { mem_block_node* old = static_cast
(p); old->next = next; next = old; ++cached_blocks; } } }; extern mem_block_cache block_cache; } } // namespace boost #ifdef BOOST_HAS_ABI_HEADERS # include BOOST_ABI_SUFFIX #endif #endif
mem_block_cache.hpp
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