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/*
* Copyright Andrey Semashev 2007 - 2015.
* 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)
*/
/*!
* \file thread_specific.cpp
* \author Andrey Semashev
* \date 01.03.2008
*
* \brief This header is the Boost.Log library implementation, see the library documentation
* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
*/
#include <string>
#include <stdexcept>
#include <boost/log/exceptions.hpp>
#include <boost/log/detail/thread_specific.hpp>
#if !defined(BOOST_LOG_NO_THREADS)
#include <boost/thread/tss.hpp> // To hook on Boost.Thread configuration macros
#include <boost/log/detail/header.hpp>
#if defined(BOOST_THREAD_PLATFORM_WIN32)
#include "windows_version.hpp"
#include <windows.h>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace aux {
thread_specific_base::thread_specific_base()
{
m_Key.as_dword = TlsAlloc();
if (m_Key.as_dword == TLS_OUT_OF_INDEXES)
{
BOOST_LOG_THROW_DESCR(system_error, "TLS capacity depleted");
}
set_content(0);
}
thread_specific_base::~thread_specific_base()
{
TlsFree(m_Key.as_dword);
}
void* thread_specific_base::get_content() const
{
return TlsGetValue(m_Key.as_dword);
}
void thread_specific_base::set_content(void* value) const
{
TlsSetValue(m_Key.as_dword, value);
}
} // namespace aux
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#elif defined(BOOST_THREAD_PLATFORM_PTHREAD)
#include <pthread.h>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/type_traits/alignment_of.hpp>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace aux {
BOOST_LOG_ANONYMOUS_NAMESPACE {
//! A helper template to disable early name binding
template< typename NonDependentT, typename DependentT >
struct make_dependent
{
typedef NonDependentT type;
};
//! Some portability magic to detect where to store the TLS key
template<
typename StorageT,
bool IsStoreableV = sizeof(pthread_key_t) <= sizeof(StorageT)
&& alignment_of< pthread_key_t >::value <= alignment_of< StorageT >::value,
bool IsPointerV = is_pointer< pthread_key_t >::value
>
struct pthread_key_traits;
//! Worst case - the key is probably some structure
template< typename StorageT, bool IsPointerV >
struct pthread_key_traits< StorageT, false, IsPointerV >
{
typedef typename make_dependent< pthread_key_t, StorageT >::type pthread_key_type;
static void allocate(StorageT& stg)
{
pthread_key_type* pkey = new pthread_key_type;
if (pthread_key_create(pkey, 0) != 0)
{
delete pkey;
BOOST_LOG_THROW_DESCR(system_error, "TLS capacity depleted");
}
stg.as_pointer = pkey;
}
static void deallocate(StorageT& stg)
{
pthread_key_type* pkey = static_cast< pthread_key_type* >(stg.as_pointer);
pthread_key_delete(*pkey);
delete pkey;
}
static void set_value(StorageT const& stg, void* value)
{
pthread_setspecific(*static_cast< pthread_key_type* >(stg.as_pointer), value);
}
static void* get_value(StorageT const& stg)
{
return pthread_getspecific(*static_cast< pthread_key_type* >(stg.as_pointer));
}
};
//! The key is a pointer
template< typename StorageT >
struct pthread_key_traits< StorageT, true, true >
{
typedef typename make_dependent< pthread_key_t, StorageT >::type pthread_key_type;
static void allocate(StorageT& stg)
{
if (pthread_key_create(reinterpret_cast< pthread_key_type* >(&stg.as_pointer), 0) != 0)
{
BOOST_LOG_THROW_DESCR(system_error, "TLS capacity depleted");
}
}
static void deallocate(StorageT& stg)
{
pthread_key_delete(reinterpret_cast< pthread_key_type >(stg.as_pointer));
}
static void set_value(StorageT const& stg, void* value)
{
pthread_setspecific(reinterpret_cast< const pthread_key_type >(stg.as_pointer), value);
}
static void* get_value(StorageT const& stg)
{
return pthread_getspecific(reinterpret_cast< const pthread_key_type >(stg.as_pointer));
}
};
//! The most probable case - the key is an integral or a structure that contains one
template< typename StorageT >
struct pthread_key_traits< StorageT, true, false >
{
typedef typename make_dependent< pthread_key_t, StorageT >::type pthread_key_type;
static void allocate(StorageT& stg)
{
if (pthread_key_create(reinterpret_cast< pthread_key_type* >(&stg.as_dword), 0) != 0)
{
BOOST_LOG_THROW_DESCR(system_error, "TLS capacity depleted");
}
}
static void deallocate(StorageT& stg)
{
pthread_key_delete(*reinterpret_cast< pthread_key_type* >(&stg.as_dword));
}
static void set_value(StorageT const& stg, void* value)
{
pthread_setspecific(*reinterpret_cast< pthread_key_type const* >(&stg.as_dword), value);
}
static void* get_value(StorageT const& stg)
{
return pthread_getspecific(*reinterpret_cast< pthread_key_type const* >(&stg.as_dword));
}
};
} // namespace
thread_specific_base::thread_specific_base()
{
typedef pthread_key_traits< key_storage > traits_t;
traits_t::allocate(m_Key);
set_content(0);
}
thread_specific_base::~thread_specific_base()
{
typedef pthread_key_traits< key_storage > traits_t;
traits_t::deallocate(m_Key);
}
void* thread_specific_base::get_content() const
{
typedef pthread_key_traits< key_storage > traits_t;
return traits_t::get_value(m_Key);
}
void thread_specific_base::set_content(void* value) const
{
typedef pthread_key_traits< key_storage > traits_t;
traits_t::set_value(m_Key, value);
}
} // namespace aux
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#else
#error Boost.Log: unsupported threading API
#endif
#include <boost/log/detail/footer.hpp>
#endif // !defined(BOOST_LOG_NO_THREADS)
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