/usr/include/boost/pool/detail/mutex.hpp is in libboost1.46-dev 1.46.1-7ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | // Copyright (C) 2000 Stephen Cleary
//
// Distributed under 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)
//
// See http://www.boost.org for updates, documentation, and revision history.
#ifndef BOOST_POOL_MUTEX_HPP
#define BOOST_POOL_MUTEX_HPP
#include <boost/config.hpp> // for workarounds
// Extremely Light-Weight wrapper classes for OS thread synchronization
// Configuration: for now, we just choose between pthread or Win32 mutexes or none
#define BOOST_MUTEX_HELPER_NONE 0
#define BOOST_MUTEX_HELPER_WIN32 1
#define BOOST_MUTEX_HELPER_PTHREAD 2
#if !defined(BOOST_HAS_THREADS) && !defined(BOOST_NO_MT)
# define BOOST_NO_MT
#endif
#ifdef BOOST_NO_MT
// No multithreading -> make locks into no-ops
#define BOOST_MUTEX_HELPER BOOST_MUTEX_HELPER_NONE
#else
#ifdef BOOST_WINDOWS
#define BOOST_MUTEX_HELPER BOOST_MUTEX_HELPER_WIN32
#else
#if defined(BOOST_HAS_UNISTD_H)
#include <unistd.h>
#endif
#if defined(_POSIX_THREADS) || defined(BOOST_HAS_PTHREADS)
#define BOOST_MUTEX_HELPER BOOST_MUTEX_HELPER_PTHREAD
#endif
#endif
#endif
#ifndef BOOST_MUTEX_HELPER
#error Unable to determine platform mutex type; define BOOST_NO_MT to assume single-threaded
#endif
#ifndef BOOST_NO_MT
# ifdef BOOST_WINDOWS
# include <windows.h>
# endif
# if defined(_POSIX_THREADS) || defined(BOOST_HAS_PTHREADS)
# include <pthread.h>
# endif
#endif
namespace boost {
namespace details {
namespace pool {
#ifndef BOOST_NO_MT
#ifdef BOOST_WINDOWS
class win32_mutex
{
private:
::CRITICAL_SECTION mtx;
win32_mutex(const win32_mutex &);
void operator=(const win32_mutex &);
public:
win32_mutex()
{ ::InitializeCriticalSection(&mtx); }
~win32_mutex()
{ ::DeleteCriticalSection(&mtx); }
void lock()
{ ::EnterCriticalSection(&mtx); }
void unlock()
{ ::LeaveCriticalSection(&mtx); }
};
#endif // defined(BOOST_WINDOWS)
#if defined(_POSIX_THREADS) || defined(BOOST_HAS_PTHREADS)
class pthread_mutex
{
private:
::pthread_mutex_t mtx;
pthread_mutex(const pthread_mutex &);
void operator=(const pthread_mutex &);
public:
pthread_mutex()
{ ::pthread_mutex_init(&mtx, 0); }
~pthread_mutex()
{ ::pthread_mutex_destroy(&mtx); }
void lock()
{ ::pthread_mutex_lock(&mtx); }
void unlock()
{ ::pthread_mutex_unlock(&mtx); }
};
#endif // defined(_POSIX_THREADS) || defined(BOOST_HAS_PTHREADS)
#endif // !defined(BOOST_NO_MT)
class null_mutex
{
private:
null_mutex(const null_mutex &);
void operator=(const null_mutex &);
public:
null_mutex() { }
static void lock() { }
static void unlock() { }
};
#if BOOST_MUTEX_HELPER == BOOST_MUTEX_HELPER_NONE
typedef null_mutex default_mutex;
#elif BOOST_MUTEX_HELPER == BOOST_MUTEX_HELPER_WIN32
typedef win32_mutex default_mutex;
#elif BOOST_MUTEX_HELPER == BOOST_MUTEX_HELPER_PTHREAD
typedef pthread_mutex default_mutex;
#endif
} // namespace pool
} // namespace details
} // namespace boost
#undef BOOST_MUTEX_HELPER_WIN32
#undef BOOST_MUTEX_HELPER_PTHREAD
#undef BOOST_MUTEX_HELPER_NONE
#undef BOOST_MUTEX_HELPER
#endif
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