362 lines
10 KiB
Plaintext
362 lines
10 KiB
Plaintext
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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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// (C) Copyright 2011,2012,2015 Vicente J. Botet Escriba
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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 <boost/thread/detail/config.hpp>
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#include <boost/assert.hpp>
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#include <pthread.h>
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#include <boost/throw_exception.hpp>
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#include <boost/core/ignore_unused.hpp>
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#include <boost/thread/exceptions.hpp>
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#if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
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#include <boost/thread/lock_types.hpp>
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#endif
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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 <boost/thread/pthread/timespec.hpp>
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#include <boost/thread/pthread/pthread_mutex_scoped_lock.hpp>
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#ifdef BOOST_THREAD_USES_CHRONO
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#include <boost/chrono/system_clocks.hpp>
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#include <boost/chrono/ceil.hpp>
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#endif
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#include <boost/thread/detail/delete.hpp>
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#if (defined(_POSIX_TIMEOUTS) && (_POSIX_TIMEOUTS-0)>=200112L) \
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|| (defined(__ANDROID__) && defined(__ANDROID_API__) && __ANDROID_API__ >= 21)
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#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
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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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#ifndef BOOST_THREAD_HAS_NO_EINTR_BUG
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#define BOOST_THREAD_HAS_EINTR_BUG
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#endif
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namespace boost
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{
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namespace posix {
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#ifdef BOOST_THREAD_HAS_EINTR_BUG
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BOOST_FORCEINLINE int pthread_mutex_destroy(pthread_mutex_t* m)
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{
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int ret;
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do
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{
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ret = ::pthread_mutex_destroy(m);
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} while (ret == EINTR);
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return ret;
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}
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BOOST_FORCEINLINE int pthread_mutex_lock(pthread_mutex_t* m)
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{
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int ret;
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do
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{
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ret = ::pthread_mutex_lock(m);
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} while (ret == EINTR);
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return ret;
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}
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BOOST_FORCEINLINE int pthread_mutex_unlock(pthread_mutex_t* m)
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{
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int ret;
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do
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{
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ret = ::pthread_mutex_unlock(m);
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} while (ret == EINTR);
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return ret;
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}
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#else
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BOOST_FORCEINLINE int pthread_mutex_destroy(pthread_mutex_t* m)
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{
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return ::pthread_mutex_destroy(m);
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}
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BOOST_FORCEINLINE int pthread_mutex_lock(pthread_mutex_t* m)
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{
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return ::pthread_mutex_lock(m);
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}
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BOOST_FORCEINLINE int pthread_mutex_unlock(pthread_mutex_t* m)
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{
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return ::pthread_mutex_unlock(m);
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}
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#endif
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}
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class mutex
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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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BOOST_THREAD_NO_COPYABLE(mutex)
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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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boost::throw_exception(thread_resource_error(res, "boost:: mutex constructor failed in pthread_mutex_init"));
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}
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}
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~mutex()
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{
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int const res = posix::pthread_mutex_destroy(&m);
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boost::ignore_unused(res);
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BOOST_ASSERT(!res);
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}
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void lock()
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{
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int res = posix::pthread_mutex_lock(&m);
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if (res)
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{
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boost::throw_exception(lock_error(res,"boost: mutex lock failed in pthread_mutex_lock"));
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}
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}
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void unlock()
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{
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int res = posix::pthread_mutex_unlock(&m);
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(void)res;
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BOOST_ASSERT(res == 0);
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// if (res)
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// {
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// boost::throw_exception(lock_error(res,"boost: mutex unlock failed in pthread_mutex_unlock"));
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// }
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}
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bool try_lock()
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{
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int res;
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do
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{
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res = pthread_mutex_trylock(&m);
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} while (res == EINTR);
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if (res==EBUSY)
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{
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return false;
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}
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return !res;
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}
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#define BOOST_THREAD_DEFINES_MUTEX_NATIVE_HANDLE
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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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#if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
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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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#endif
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};
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typedef mutex try_mutex;
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class timed_mutex
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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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BOOST_THREAD_NO_COPYABLE(timed_mutex)
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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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boost::throw_exception(thread_resource_error(res, "boost:: timed_mutex constructor failed in pthread_mutex_init"));
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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(!posix::pthread_mutex_destroy(&m));
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//BOOST_VERIFY(!pthread_mutex_destroy(&m));
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boost::throw_exception(thread_resource_error(res2, "boost:: timed_mutex constructor failed in pthread_cond_init"));
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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(!posix::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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#if defined BOOST_THREAD_USES_DATETIME
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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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#endif
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#ifdef BOOST_PTHREAD_HAS_TIMEDLOCK
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void lock()
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{
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int res = posix::pthread_mutex_lock(&m);
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if (res)
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{
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boost::throw_exception(lock_error(res,"boost: mutex lock failed in pthread_mutex_lock"));
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}
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}
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void unlock()
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{
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int res = posix::pthread_mutex_unlock(&m);
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(void)res;
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BOOST_ASSERT(res == 0);
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// if (res)
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// {
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// boost::throw_exception(lock_error(res,"boost: mutex unlock failed in pthread_mutex_unlock"));
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// }
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}
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bool try_lock()
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{
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int res;
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do
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{
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res = pthread_mutex_trylock(&m);
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} while (res == EINTR);
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if (res==EBUSY)
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{
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return false;
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}
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return !res;
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}
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private:
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bool do_try_lock_until(struct timespec const &timeout)
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{
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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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public:
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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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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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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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private:
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bool do_try_lock_until(struct timespec const &timeout)
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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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int const cond_res=pthread_cond_timedwait(&cond,&m,&timeout);
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if(cond_res==ETIMEDOUT)
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{
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return false;
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}
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BOOST_ASSERT(!cond_res);
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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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public:
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#endif
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#if defined BOOST_THREAD_USES_DATETIME
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bool timed_lock(system_time const & abs_time)
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{
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struct timespec const ts=boost::detail::to_timespec(abs_time);
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return do_try_lock_until(ts);
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}
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#endif
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Rep, class Period>
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bool try_lock_for(const chrono::duration<Rep, Period>& rel_time)
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{
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return try_lock_until(chrono::steady_clock::now() + rel_time);
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}
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template <class Clock, class Duration>
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bool try_lock_until(const chrono::time_point<Clock, Duration>& t)
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{
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using namespace chrono;
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system_clock::time_point s_now = system_clock::now();
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typename Clock::time_point c_now = Clock::now();
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return try_lock_until(s_now + ceil<nanoseconds>(t - c_now));
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}
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template <class Duration>
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bool try_lock_until(const chrono::time_point<chrono::system_clock, Duration>& t)
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{
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using namespace chrono;
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typedef time_point<system_clock, nanoseconds> nano_sys_tmpt;
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return try_lock_until(nano_sys_tmpt(ceil<nanoseconds>(t.time_since_epoch())));
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}
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bool try_lock_until(const chrono::time_point<chrono::system_clock, chrono::nanoseconds>& tp)
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{
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//using namespace chrono;
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chrono::nanoseconds d = tp.time_since_epoch();
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timespec ts = boost::detail::to_timespec(d);
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return do_try_lock_until(ts);
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}
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#endif
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#define BOOST_THREAD_DEFINES_TIMED_MUTEX_NATIVE_HANDLE
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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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#if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
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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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#endif
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};
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}
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#include <boost/config/abi_suffix.hpp>
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#endif
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