| Server IP : 172.67.216.182 / Your IP : 104.23.175.82 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/boost/boost_1_59_0/boost/thread/pthread/ |
Upload File : |
#ifndef BOOST_THREAD_PTHREAD_ONCE_HPP
#define BOOST_THREAD_PTHREAD_ONCE_HPP
// once.hpp
//
// (C) Copyright 2007-8 Anthony Williams
// (C) Copyright 2011-2012 Vicente J. Botet Escriba
//
// 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)
#include <boost/thread/detail/config.hpp>
#include <boost/thread/detail/move.hpp>
#include <boost/thread/detail/invoke.hpp>
#include <boost/thread/pthread/pthread_mutex_scoped_lock.hpp>
#include <boost/thread/detail/delete.hpp>
#include <boost/core/no_exceptions_support.hpp>
#include <boost/bind.hpp>
#include <boost/assert.hpp>
#include <boost/config/abi_prefix.hpp>
#include <boost/cstdint.hpp>
#include <pthread.h>
#include <csignal>
namespace boost
{
struct once_flag;
#define BOOST_ONCE_INITIAL_FLAG_VALUE 0
namespace thread_detail
{
typedef boost::uint32_t uintmax_atomic_t;
#define BOOST_THREAD_DETAIL_UINTMAX_ATOMIC_C2(value) value##u
#define BOOST_THREAD_DETAIL_UINTMAX_ATOMIC_MAX_C BOOST_THREAD_DETAIL_UINTMAX_ATOMIC_C2(~0)
}
#ifdef BOOST_THREAD_PROVIDES_ONCE_CXX11
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<typename Function, class ...ArgTypes>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(ArgTypes)... args);
#else
template<typename Function>
inline void call_once(once_flag& flag, Function f);
template<typename Function, typename T1>
inline void call_once(once_flag& flag, Function f, T1 p1);
template<typename Function, typename T1, typename T2>
inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2);
template<typename Function, typename T1, typename T2, typename T3>
inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2, T3 p3);
#endif
struct once_flag
{
BOOST_THREAD_NO_COPYABLE(once_flag)
BOOST_CONSTEXPR once_flag() BOOST_NOEXCEPT
: epoch(BOOST_ONCE_INITIAL_FLAG_VALUE)
{}
private:
volatile thread_detail::uintmax_atomic_t epoch;
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<typename Function, class ...ArgTypes>
friend void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(ArgTypes)... args);
#else
template<typename Function>
friend void call_once(once_flag& flag, Function f);
template<typename Function, typename T1>
friend void call_once(once_flag& flag, Function f, T1 p1);
template<typename Function, typename T1, typename T2>
friend void call_once(once_flag& flag, Function f, T1 p1, T2 p2);
template<typename Function, typename T1, typename T2, typename T3>
friend void call_once(once_flag& flag, Function f, T1 p1, T2 p2, T3 p3);
#endif
};
#define BOOST_ONCE_INIT once_flag()
#else // BOOST_THREAD_PROVIDES_ONCE_CXX11
struct once_flag
{
volatile thread_detail::uintmax_atomic_t epoch;
};
#define BOOST_ONCE_INIT {BOOST_ONCE_INITIAL_FLAG_VALUE}
#endif // BOOST_THREAD_PROVIDES_ONCE_CXX11
#if defined BOOST_THREAD_PROVIDES_INVOKE
#define BOOST_THREAD_INVOKE_RET_VOID detail::invoke
#define BOOST_THREAD_INVOKE_RET_VOID_CALL
#elif defined BOOST_THREAD_PROVIDES_INVOKE_RET
#define BOOST_THREAD_INVOKE_RET_VOID detail::invoke<void>
#define BOOST_THREAD_INVOKE_RET_VOID_CALL
#else
#define BOOST_THREAD_INVOKE_RET_VOID boost::bind
#define BOOST_THREAD_INVOKE_RET_VOID_CALL ()
#endif
namespace thread_detail
{
BOOST_THREAD_DECL uintmax_atomic_t& get_once_per_thread_epoch();
BOOST_THREAD_DECL extern uintmax_atomic_t once_global_epoch;
BOOST_THREAD_DECL extern pthread_mutex_t once_epoch_mutex;
BOOST_THREAD_DECL extern pthread_cond_t once_epoch_cv;
}
// Based on Mike Burrows fast_pthread_once algorithm as described in
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2444.html
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<typename Function, class ...ArgTypes>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(ArgTypes)... args)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(
thread_detail::decay_copy(boost::forward<Function>(f)),
thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
#else
template<typename Function>
inline void call_once(once_flag& flag, Function f)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
f();
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1>
inline void call_once(once_flag& flag, Function f, T1 p1)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(f,p1) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1, typename T2>
inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(f,p1, p2) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1, typename T2, typename T3>
inline void call_once(once_flag& flag, Function f, T1 p1, T2 p2, T3 p3)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(f,p1, p2, p3) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
f();
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(
thread_detail::decay_copy(boost::forward<Function>(f)),
thread_detail::decay_copy(boost::forward<T1>(p1))
) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1, typename T2>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1, BOOST_THREAD_RV_REF(T2) p2)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(
thread_detail::decay_copy(boost::forward<Function>(f)),
thread_detail::decay_copy(boost::forward<T1>(p1)),
thread_detail::decay_copy(boost::forward<T1>(p2))
) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
template<typename Function, typename T1, typename T2, typename T3>
inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(T1) p1, BOOST_THREAD_RV_REF(T2) p2, BOOST_THREAD_RV_REF(T3) p3)
{
static thread_detail::uintmax_atomic_t const uninitialized_flag=BOOST_ONCE_INITIAL_FLAG_VALUE;
static thread_detail::uintmax_atomic_t const being_initialized=uninitialized_flag+1;
thread_detail::uintmax_atomic_t const epoch=flag.epoch;
thread_detail::uintmax_atomic_t& this_thread_epoch=thread_detail::get_once_per_thread_epoch();
if(epoch<this_thread_epoch)
{
pthread::pthread_mutex_scoped_lock lk(&thread_detail::once_epoch_mutex);
while(flag.epoch<=being_initialized)
{
if(flag.epoch==uninitialized_flag)
{
flag.epoch=being_initialized;
BOOST_TRY
{
pthread::pthread_mutex_scoped_unlock relocker(&thread_detail::once_epoch_mutex);
BOOST_THREAD_INVOKE_RET_VOID(
thread_detail::decay_copy(boost::forward<Function>(f)),
thread_detail::decay_copy(boost::forward<T1>(p1)),
thread_detail::decay_copy(boost::forward<T1>(p2)),
thread_detail::decay_copy(boost::forward<T1>(p3))
) BOOST_THREAD_INVOKE_RET_VOID_CALL;
}
BOOST_CATCH (...)
{
flag.epoch=uninitialized_flag;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
BOOST_RETHROW
}
BOOST_CATCH_END
flag.epoch=--thread_detail::once_global_epoch;
BOOST_VERIFY(!pthread_cond_broadcast(&thread_detail::once_epoch_cv));
}
else
{
while(flag.epoch==being_initialized)
{
BOOST_VERIFY(!pthread_cond_wait(&thread_detail::once_epoch_cv,&thread_detail::once_epoch_mutex));
}
}
}
this_thread_epoch=thread_detail::once_global_epoch;
}
}
#endif
}
#include <boost/config/abi_suffix.hpp>
#endif