tls.h
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// -*- C++ -*-
// Copyright (C) 2010-2017, Vaclav Haisman. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modifica-
// tion, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
// DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef LOG4CPLUS_THREAD_IMPL_TLS_H
#define LOG4CPLUS_THREAD_IMPL_TLS_H
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#include <new>
#include <cassert>
#include <system_error>
#if ! defined (INSIDE_LOG4CPLUS)
# error "This header must not be be used outside log4cplus' implementation files."
#endif
#ifdef LOG4CPLUS_USE_PTHREADS
# include <pthread.h>
#elif defined (LOG4CPLUS_USE_WIN32_THREADS)
# include <log4cplus/config/windowsh-inc.h>
#elif defined (LOG4CPLUS_SINGLE_THREADED)
# include <vector>
#endif
namespace log4cplus { namespace thread { namespace impl {
typedef void * tls_value_type;
#ifdef LOG4CPLUS_USE_PTHREADS
typedef pthread_key_t * tls_key_type;
typedef void (* tls_init_cleanup_func_type)(void *);
#elif defined (LOG4CPLUS_USE_WIN32_THREADS)
typedef DWORD tls_key_type;
typedef PFLS_CALLBACK_FUNCTION tls_init_cleanup_func_type;
#elif defined (LOG4CPLUS_SINGLE_THREADED)
typedef std::size_t tls_key_type;
typedef void (* tls_init_cleanup_func_type)(void *);
#endif
inline tls_key_type tls_init (tls_init_cleanup_func_type);
inline tls_value_type tls_get_value (tls_key_type);
inline void tls_set_value (tls_key_type, tls_value_type);
inline void tls_cleanup (tls_key_type);
#if defined (LOG4CPLUS_USE_PTHREADS)
tls_key_type
tls_init (tls_init_cleanup_func_type cleanupfunc)
{
pthread_key_t * key = new pthread_key_t;
int ret = pthread_key_create (key, cleanupfunc);
if (LOG4CPLUS_UNLIKELY (ret != 0))
throw std::system_error(ret, std::system_category (),
"pthread_key_create() failed");
return key;
}
tls_value_type
tls_get_value (tls_key_type key)
{
return pthread_getspecific (*key);
}
void
tls_set_value (tls_key_type key, tls_value_type value)
{
pthread_setspecific(*key, value);
}
void
tls_cleanup (tls_key_type key)
{
pthread_key_delete (*key);
delete key;
}
#elif defined (LOG4CPLUS_USE_WIN32_THREADS)
tls_key_type
tls_init (tls_init_cleanup_func_type cleanupfunc)
{
DWORD const slot = FlsAlloc (cleanupfunc);
if (LOG4CPLUS_UNLIKELY (slot == FLS_OUT_OF_INDEXES))
{
DWORD const eno = GetLastError ();
throw std::system_error (static_cast<int>(eno),
std::system_category (), "FlsAlloc() failed");
}
return slot;
}
tls_value_type tls_get_value (tls_key_type k)
{
return FlsGetValue (k);
}
void
tls_set_value (tls_key_type k, tls_value_type value)
{
FlsSetValue (k, value);
}
void
tls_cleanup (tls_key_type k)
{
FlsFree (k);
}
#elif defined (LOG4CPLUS_SINGLE_THREADED)
extern std::vector<tls_value_type> * tls_single_threaded_values;
tls_key_type
tls_init (tls_init_cleanup_func_type)
{
if (! tls_single_threaded_values)
tls_single_threaded_values = new std::vector<tls_value_type>;
tls_key_type key = tls_single_threaded_values->size ();
tls_single_threaded_values->resize (key + 1);
return key;
}
tls_value_type
tls_get_value (tls_key_type k)
{
assert (k < tls_single_threaded_values->size ());
return (*tls_single_threaded_values)[k];
}
void
tls_set_value (tls_key_type k, tls_value_type val)
{
assert (k < tls_single_threaded_values->size ());
(*tls_single_threaded_values)[k] = val;
}
void
tls_cleanup (tls_key_type k)
{
assert (k < tls_single_threaded_values->size ());
(*tls_single_threaded_values)[k] = 0;
}
#endif
} } } // namespace log4cplus { namespace thread { namespace impl {
#endif // LOG4CPLUS_THREAD_IMPL_TLS_H
config.hxx
LOG4CPLUS_UNLIKELY
#define LOG4CPLUS_UNLIKELY(cond)
Definition config.hxx:141
log4cplus::thread::impl
Definition syncprims-cxx11.h:31
log4cplus::thread::impl::tls_init
tls_key_type tls_init(tls_init_cleanup_func_type)
log4cplus::thread::impl::tls_set_value
void tls_set_value(tls_key_type, tls_value_type)
log4cplus::thread::impl::tls_get_value
tls_value_type tls_get_value(tls_key_type)
log4cplus::thread::impl::tls_value_type
void * tls_value_type
Definition tls.h:57
log4cplus::thread::impl::tls_cleanup
void tls_cleanup(tls_key_type)
log4cplus::thread
Definition queue.h:42
log4cplus
Definition appender.h:46
windowsh-inc.h