author | jascui |
Mon, 29 Nov 2010 15:46:44 +0800 | |
changeset 711 | 03a6f48f6e14 |
parent 0 | 044383f39525 |
permissions | -rw-r--r-- |
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#ifndef BOOST_THREAD_PTHREAD_MUTEX_HPP |
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#define BOOST_THREAD_PTHREAD_MUTEX_HPP |
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// (C) Copyright 2007-8 Anthony Williams |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#include <pthread.h> |
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#include <boost/utility.hpp> |
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#include <boost/thread/exceptions.hpp> |
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#include <boost/thread/locks.hpp> |
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#include <boost/thread/thread_time.hpp> |
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#include <boost/thread/xtime.hpp> |
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#include <boost/assert.hpp> |
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#include <errno.h> |
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#include "timespec.hpp" |
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#include "pthread_mutex_scoped_lock.hpp" |
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#ifdef _POSIX_TIMEOUTS |
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#if _POSIX_TIMEOUTS >= 0 |
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#define BOOST_PTHREAD_HAS_TIMEDLOCK |
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#endif |
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#endif |
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#include <boost/config/abi_prefix.hpp> |
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namespace boost |
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{ |
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class mutex: |
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boost::noncopyable |
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{ |
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private: |
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pthread_mutex_t m; |
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public: |
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mutex() |
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{ |
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int const res=pthread_mutex_init(&m,NULL); |
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if(res) |
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{ |
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throw thread_resource_error(); |
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} |
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} |
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~mutex() |
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{ |
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BOOST_VERIFY(!pthread_mutex_destroy(&m)); |
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} |
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void lock() |
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{ |
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BOOST_VERIFY(!pthread_mutex_lock(&m)); |
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} |
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void unlock() |
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{ |
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BOOST_VERIFY(!pthread_mutex_unlock(&m)); |
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} |
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bool try_lock() |
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{ |
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int const res=pthread_mutex_trylock(&m); |
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BOOST_ASSERT(!res || res==EBUSY); |
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return !res; |
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} |
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typedef pthread_mutex_t* native_handle_type; |
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native_handle_type native_handle() |
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{ |
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return &m; |
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} |
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typedef unique_lock<mutex> scoped_lock; |
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typedef detail::try_lock_wrapper<mutex> scoped_try_lock; |
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}; |
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typedef mutex try_mutex; |
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class timed_mutex: |
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boost::noncopyable |
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{ |
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private: |
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pthread_mutex_t m; |
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#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK |
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pthread_cond_t cond; |
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bool is_locked; |
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#endif |
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public: |
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timed_mutex() |
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{ |
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int const res=pthread_mutex_init(&m,NULL); |
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if(res) |
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{ |
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throw thread_resource_error(); |
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} |
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#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK |
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int const res2=pthread_cond_init(&cond,NULL); |
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if(res2) |
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{ |
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BOOST_VERIFY(!pthread_mutex_destroy(&m)); |
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throw thread_resource_error(); |
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} |
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is_locked=false; |
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#endif |
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} |
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~timed_mutex() |
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{ |
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BOOST_VERIFY(!pthread_mutex_destroy(&m)); |
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#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK |
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BOOST_VERIFY(!pthread_cond_destroy(&cond)); |
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#endif |
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} |
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|
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template<typename TimeDuration> |
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bool timed_lock(TimeDuration const & relative_time) |
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{ |
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return timed_lock(get_system_time()+relative_time); |
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} |
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bool timed_lock(boost::xtime const & absolute_time) |
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{ |
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return timed_lock(system_time(absolute_time)); |
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} |
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#ifdef BOOST_PTHREAD_HAS_TIMEDLOCK |
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void lock() |
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{ |
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BOOST_VERIFY(!pthread_mutex_lock(&m)); |
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} |
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|
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void unlock() |
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{ |
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BOOST_VERIFY(!pthread_mutex_unlock(&m)); |
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} |
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|
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bool try_lock() |
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{ |
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int const res=pthread_mutex_trylock(&m); |
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BOOST_ASSERT(!res || res==EBUSY); |
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return !res; |
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} |
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bool timed_lock(system_time const & abs_time) |
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{ |
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struct timespec const timeout=detail::get_timespec(abs_time); |
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int const res=pthread_mutex_timedlock(&m,&timeout); |
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BOOST_ASSERT(!res || res==ETIMEDOUT); |
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return !res; |
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} |
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|
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typedef pthread_mutex_t* native_handle_type; |
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native_handle_type native_handle() |
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{ |
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return &m; |
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} |
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152 |
|
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#else |
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void lock() |
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{ |
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boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); |
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while(is_locked) |
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{ |
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BOOST_VERIFY(!pthread_cond_wait(&cond,&m)); |
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} |
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is_locked=true; |
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} |
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163 |
|
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void unlock() |
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{ |
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boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); |
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is_locked=false; |
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BOOST_VERIFY(!pthread_cond_signal(&cond)); |
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} |
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170 |
|
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bool try_lock() |
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{ |
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boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); |
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if(is_locked) |
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{ |
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return false; |
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} |
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is_locked=true; |
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return true; |
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} |
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181 |
|
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182 |
bool timed_lock(system_time const & abs_time) |
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183 |
{ |
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struct timespec const timeout=detail::get_timespec(abs_time); |
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185 |
boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); |
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while(is_locked) |
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187 |
{ |
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int const cond_res=pthread_cond_timedwait(&cond,&m,&timeout); |
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if(cond_res==ETIMEDOUT) |
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190 |
{ |
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191 |
return false; |
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192 |
} |
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BOOST_ASSERT(!cond_res); |
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194 |
} |
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is_locked=true; |
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196 |
return true; |
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197 |
} |
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198 |
#endif |
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199 |
|
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200 |
typedef unique_lock<timed_mutex> scoped_timed_lock; |
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typedef detail::try_lock_wrapper<timed_mutex> scoped_try_lock; |
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typedef scoped_timed_lock scoped_lock; |
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203 |
}; |
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204 |
|
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205 |
} |
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206 |
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207 |
#include <boost/config/abi_suffix.hpp> |
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208 |
|
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209 |
|
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210 |
#endif |