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81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
/*============================================================================*/
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/*
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VFLib: https://github.com/vinniefalco/VFLib
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Copyright (C) 2008 by Vinnie Falco <vinnie.falco@gmail.com>
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This library contains portions of other open source products covered by
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separate licenses. Please see the corresponding source files for specific
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terms.
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VFLib is provided under the terms of The MIT License (MIT):
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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/*============================================================================*/
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#ifndef BEAST_FIFOFREESTOREWITHOUTTLS_BEASTHEADER
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#define BEAST_FIFOFREESTOREWITHOUTTLS_BEASTHEADER
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#include "beast_GlobalPagedFreeStore.h"
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/*============================================================================*/
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/**
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Lock-free FIFO memory allocator.
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This allocator is suitable for use with CallQueue and Listeners. It is
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expected that over time, deallocations will occur in roughly the same order
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as allocations.
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@note This version of the fifo free store uses less memory and doesn't require
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thread specific storage. However, it runs slower. The performance
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differences are negligible for desktop class applications.
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@invariant allocate() and deallocate() are fully concurrent.
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@invariant The ABA problem is handled automatically.
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@ingroup beast_concurrent
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*/
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class FifoFreeStoreWithoutTLS
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{
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public:
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explicit FifoFreeStoreWithoutTLS ();
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~FifoFreeStoreWithoutTLS ();
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void* allocate (const size_t bytes);
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static void deallocate (void* const p);
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private:
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typedef GlobalPagedFreeStore PagedFreeStoreType;
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struct Header;
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class Block;
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inline Block* newBlock ();
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static inline void deleteBlock (Block* b);
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private:
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Block* volatile m_active;
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PagedFreeStoreType::Ptr m_pages;
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};
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#endif
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