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| author | Remko Tronçon <git@el-tramo.be> | 2009-06-01 08:48:42 (GMT) |
|---|---|---|
| committer | Remko Tronçon <git@el-tramo.be> | 2009-06-01 09:24:28 (GMT) |
| commit | 2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch) | |
| tree | d46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp | |
| download | swift-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip swift-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2 | |
Import.
Diffstat (limited to '3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp')
| -rw-r--r-- | 3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp b/3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp new file mode 100644 index 0000000..222142d --- /dev/null +++ b/3rdParty/Boost/boost/regex/v4/mem_block_cache.hpp @@ -0,0 +1,99 @@ + /* + * 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 <boost/version.hpp> + * 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 <new> +#ifdef BOOST_HAS_THREADS +#include <boost/regex/pending/static_mutex.hpp> +#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<mem_block_node*>(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 + |