-//$$CDS-header$$
+/*
+ This file is a part of libcds - Concurrent Data Structures library
-#ifndef __CDS_THREADING__COMMON_H
-#define __CDS_THREADING__COMMON_H
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
-#include <cds/gc/hp/hp_decl.h>
-#include <cds/gc/dhp/dhp_decl.h>
+ Source code repo: http://github.com/khizmax/libcds/
+ Download: http://sourceforge.net/projects/libcds/files/
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ * 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (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 CDSLIB_THREADING__COMMON_H
+#define CDSLIB_THREADING__COMMON_H
#include <cds/urcu/details/gp_decl.h>
#include <cds/urcu/details/sh_decl.h>
The library does not dictate any thread model. To embed the library to your application you should choose
appropriate implementation of \p cds::threading::Manager interface
or should provide yourself.
- The \p %cds::threading::Manager interface manages \p ñds::threading::ThreadData structure that contains GC's thread specific data.
+ The \p %cds::threading::Manager interface manages \p cds::threading::ThreadData structure that contains GC's thread specific data.
Any \p cds::threading::Manager implementation is a singleton and it must be accessible from any thread and from any point of
your application. Note that you should not mix different implementation of the \p cds::threading::Manager in your application.
\code
class Manager {
public:
- // Initialize manager (called by cds::Initialize() )
+ // Initialize manager (called by cds::Initialize())
static void init();
- // Terminate manager (called by cds::Terminate() )
+ // Terminate manager (called by cds::Terminate())
static void fini();
// Checks whether current thread is attached to \p libcds feature or not.
// (called by dtor of GC thread object, for example, by dtor of cds::gc::HP::thread_gc)
static void detachThread();
- // Get cds::gc::HP thread GC implementation for current thread
- static gc::HP::thread_gc_impl& getHZPGC();
-
// Get cds::gc::DHP thread GC implementation for current thread;
static gc::DHP::thread_gc_impl& getDHPGC();
};
struct ThreadData {
//@cond
- char CDS_DATA_ALIGNMENT(8) m_hpManagerPlaceholder[sizeof(cds::gc::HP::thread_gc_impl)]; ///< Michael's Hazard Pointer GC placeholder
- char CDS_DATA_ALIGNMENT(8) m_dhpManagerPlaceholder[sizeof(cds::gc::DHP::thread_gc_impl)]; ///< Dynamic Hazard Pointer GC placeholder
-
cds::urcu::details::thread_data< cds::urcu::general_instant_tag > * m_pGPIRCU;
cds::urcu::details::thread_data< cds::urcu::general_buffered_tag > * m_pGPBRCU;
cds::urcu::details::thread_data< cds::urcu::general_threaded_tag > * m_pGPTRCU;
#ifdef CDS_URCU_SIGNAL_HANDLING_ENABLED
cds::urcu::details::thread_data< cds::urcu::signal_buffered_tag > * m_pSHBRCU;
- cds::urcu::details::thread_data< cds::urcu::signal_threaded_tag > * m_pSHTRCU;
#endif
//@endcond
- cds::gc::HP::thread_gc_impl * m_hpManager ; ///< Michael's Hazard Pointer GC thread-specific data
- cds::gc::DHP::thread_gc_impl * m_dhpManager ; ///< Dynamic Hazard Pointer GC thread-specific data
-
size_t m_nFakeProcessorNumber ; ///< fake "current processor" number
//@cond
//@cond
static CDS_EXPORT_API atomics::atomic<size_t> s_nLastUsedProcNo;
- static CDS_EXPORT_API size_t s_nProcCount;
+ static CDS_EXPORT_API size_t s_nProcCount;
//@endcond
//@cond
, m_pGPTRCU( nullptr )
#ifdef CDS_URCU_SIGNAL_HANDLING_ENABLED
, m_pSHBRCU( nullptr )
- , m_pSHTRCU( nullptr )
#endif
, m_nFakeProcessorNumber( s_nLastUsedProcNo.fetch_add(1, atomics::memory_order_relaxed) % s_nProcCount )
, m_nAttachCount(0)
- {
- if (cds::gc::HP::isUsed() )
- m_hpManager = new (m_hpManagerPlaceholder) cds::gc::HP::thread_gc_impl;
- else
- m_hpManager = nullptr;
-
- if ( cds::gc::DHP::isUsed() )
- m_dhpManager = new (m_dhpManagerPlaceholder) cds::gc::DHP::thread_gc_impl;
- else
- m_dhpManager = nullptr;
- }
+ {}
~ThreadData()
{
- if ( m_hpManager ) {
- typedef cds::gc::HP::thread_gc_impl hp_thread_gc_impl;
- m_hpManager->~hp_thread_gc_impl();
- m_hpManager = nullptr;
- }
-
- if ( m_dhpManager ) {
- typedef cds::gc::DHP::thread_gc_impl dhp_thread_gc_impl;
- m_dhpManager->~dhp_thread_gc_impl();
- m_dhpManager = nullptr;
- }
-
assert( m_pGPIRCU == nullptr );
assert( m_pGPBRCU == nullptr );
assert( m_pGPTRCU == nullptr );
#ifdef CDS_URCU_SIGNAL_HANDLING_ENABLED
assert( m_pSHBRCU == nullptr );
- assert( m_pSHTRCU == nullptr );
-#endif
- }
-
- void init()
- {
- if ( m_nAttachCount++ == 0 ) {
- if ( cds::gc::HP::isUsed() )
- m_hpManager->init();
- if ( cds::gc::DHP::isUsed() )
- m_dhpManager->init();
-
- if ( cds::urcu::details::singleton<cds::urcu::general_instant_tag>::isUsed() )
- m_pGPIRCU = cds::urcu::details::singleton<cds::urcu::general_instant_tag>::attach_thread();
- if ( cds::urcu::details::singleton<cds::urcu::general_buffered_tag>::isUsed() )
- m_pGPBRCU = cds::urcu::details::singleton<cds::urcu::general_buffered_tag>::attach_thread();
- if ( cds::urcu::details::singleton<cds::urcu::general_threaded_tag>::isUsed() )
- m_pGPTRCU = cds::urcu::details::singleton<cds::urcu::general_threaded_tag>::attach_thread();
-#ifdef CDS_URCU_SIGNAL_HANDLING_ENABLED
- if ( cds::urcu::details::singleton<cds::urcu::signal_buffered_tag>::isUsed() )
- m_pSHBRCU = cds::urcu::details::singleton<cds::urcu::signal_buffered_tag>::attach_thread();
- if ( cds::urcu::details::singleton<cds::urcu::signal_threaded_tag>::isUsed() )
- m_pSHTRCU = cds::urcu::details::singleton<cds::urcu::signal_threaded_tag>::attach_thread();
#endif
- }
}
- bool fini()
- {
- if ( --m_nAttachCount == 0 ) {
- if ( cds::gc::DHP::isUsed() )
- m_dhpManager->fini();
- if ( cds::gc::HP::isUsed() )
- m_hpManager->fini();
-
- if ( cds::urcu::details::singleton<cds::urcu::general_instant_tag>::isUsed() ) {
- cds::urcu::details::singleton<cds::urcu::general_instant_tag>::detach_thread( m_pGPIRCU );
- m_pGPIRCU = nullptr;
- }
- if ( cds::urcu::details::singleton<cds::urcu::general_buffered_tag>::isUsed() ) {
- cds::urcu::details::singleton<cds::urcu::general_buffered_tag>::detach_thread( m_pGPBRCU );
- m_pGPBRCU = nullptr;
- }
- if ( cds::urcu::details::singleton<cds::urcu::general_threaded_tag>::isUsed() ) {
- cds::urcu::details::singleton<cds::urcu::general_threaded_tag>::detach_thread( m_pGPTRCU );
- m_pGPTRCU = nullptr;
- }
-#ifdef CDS_URCU_SIGNAL_HANDLING_ENABLED
- if ( cds::urcu::details::singleton<cds::urcu::signal_buffered_tag>::isUsed() ) {
- cds::urcu::details::singleton<cds::urcu::signal_buffered_tag>::detach_thread( m_pSHBRCU );
- m_pSHBRCU = nullptr;
- }
- if ( cds::urcu::details::singleton<cds::urcu::signal_threaded_tag>::isUsed() ) {
- cds::urcu::details::singleton<cds::urcu::signal_threaded_tag>::detach_thread( m_pSHTRCU );
- m_pSHTRCU = nullptr;
- }
-#endif
- return true;
- }
- return false;
- }
+ CDS_EXPORT_API void init();
+ CDS_EXPORT_API bool fini();
size_t fake_current_processor()
{
//@endcond
} // namespace threading
-} // namespace cds::threading
+} // namespace cds
-#endif // #ifndef __CDS_THREADING__COMMON_H
+#endif // #ifndef CDSLIB_THREADING__COMMON_H
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