source: NonGTP/Boost/boost/pool/singleton_pool.hpp @ 857

Revision 857, 3.2 KB checked in by igarcia, 19 years ago (diff)
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[857]1// Copyright (C) 2000, 2001 Stephen Cleary
2//
3// Distributed under the Boost Software License, Version 1.0. (See
4// accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6//
7// See http://www.boost.org for updates, documentation, and revision history.
8
9#ifndef BOOST_SINGLETON_POOL_HPP
10#define BOOST_SINGLETON_POOL_HPP
11
12#include <boost/pool/poolfwd.hpp>
13
14// boost::pool
15#include <boost/pool/pool.hpp>
16// boost::details::pool::singleton_default
17#include <boost/pool/detail/singleton.hpp>
18// boost::details::pool::guard
19#include <boost/pool/detail/guard.hpp>
20
21namespace boost {
22
23//
24// The singleton_pool class allows other pool interfaces for types of the same
25//   size to share the same pool
26//
27template <typename Tag, unsigned RequestedSize,
28    typename UserAllocator,
29    typename Mutex,
30    unsigned NextSize>
31struct singleton_pool
32{
33  public:
34    typedef Tag tag;
35    typedef Mutex mutex;
36    typedef UserAllocator user_allocator;
37    typedef typename pool<UserAllocator>::size_type size_type;
38    typedef typename pool<UserAllocator>::difference_type difference_type;
39
40    BOOST_STATIC_CONSTANT(unsigned, requested_size = RequestedSize);
41    BOOST_STATIC_CONSTANT(unsigned, next_size = NextSize);
42
43  private:
44    struct pool_type: Mutex
45    {
46      pool<UserAllocator> p;
47      pool_type():p(RequestedSize, NextSize) { }
48    };
49
50    typedef details::pool::singleton_default<pool_type> singleton;
51
52    singleton_pool();
53
54  public:
55    static void * malloc()
56    {
57      pool_type & p = singleton::instance();
58      details::pool::guard<Mutex> g(p);
59      return p.p.malloc();
60    }
61    static void * ordered_malloc()
62    {
63      pool_type & p = singleton::instance();
64      details::pool::guard<Mutex> g(p);
65      return p.p.ordered_malloc();
66    }
67    static void * ordered_malloc(const size_type n)
68    {
69      pool_type & p = singleton::instance();
70      details::pool::guard<Mutex> g(p);
71      return p.p.ordered_malloc(n);
72    }
73    static bool is_from(void * const ptr)
74    {
75      pool_type & p = singleton::instance();
76      details::pool::guard<Mutex> g(p);
77      return p.p.is_from(ptr);
78    }
79    static void free(void * const ptr)
80    {
81      pool_type & p = singleton::instance();
82      details::pool::guard<Mutex> g(p);
83      p.p.free(ptr);
84    }
85    static void ordered_free(void * const ptr)
86    {
87      pool_type & p = singleton::instance();
88      details::pool::guard<Mutex> g(p);
89      p.p.ordered_free(ptr);
90    }
91    static void free(void * const ptr, const size_type n)
92    {
93      pool_type & p = singleton::instance();
94      details::pool::guard<Mutex> g(p);
95      p.p.free(ptr, n);
96    }
97    static void ordered_free(void * const ptr, const size_type n)
98    {
99      pool_type & p = singleton::instance();
100      details::pool::guard<Mutex> g(p);
101      p.p.ordered_free(ptr, n);
102    }
103    static bool release_memory()
104    {
105      pool_type & p = singleton::instance();
106      details::pool::guard<Mutex> g(p);
107      return p.p.release_memory();
108    }
109    static bool purge_memory()
110    {
111      pool_type & p = singleton::instance();
112      details::pool::guard<Mutex> g(p);
113      return p.p.purge_memory();
114    }
115};
116
117} // namespace boost
118
119#endif
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