2 This file is a part of libcds - Concurrent Data Structures library
4 (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
6 Source code repo: http://github.com/khizmax/libcds/
7 Download: http://sourceforge.net/projects/libcds/files/
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
12 * Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <cds/algo/atomic.h>
33 #include <cds/algo/backoff_strategy.h>
35 #if CDS_OS_INTERFACE == CDS_OSI_WINDOWS && CDS_OS_TYPE != CDS_OS_MINGW
36 # if CDS_COMPILER == CDS_COMPILER_MSVC || CDS_COMPILER == CDS_COMPILER_INTEL
37 # include <cds/threading/details/msvc_manager.h>
39 # include <cds/threading/details/wintls_manager.h>
40 #else // CDS_OS_INTERFACE != CDS_OSI_WINDOWS
41 # if CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG || CDS_COMPILER == CDS_COMPILER_INTEL
42 # include <cds/threading/details/gcc_manager.h>
44 # include <cds/threading/details/pthread_manager.h>
47 #ifdef CDS_CXX11_THREAD_LOCAL_SUPPORT
48 # include <cds/threading/details/cxx11_manager.h>
53 #if CDS_OS_INTERFACE == CDS_OSI_WINDOWS
54 CDS_EXPORT_API DWORD cds::threading::wintls::Manager::Holder::m_key = TLS_OUT_OF_INDEXES;
55 # if CDS_COMPILER == CDS_COMPILER_MSVC || CDS_COMPILER == CDS_COMPILER_INTEL
56 __declspec( thread ) threading::msvc_internal::ThreadDataPlaceholder threading::msvc_internal::s_threadData;
57 __declspec(thread) threading::ThreadData * threading::msvc_internal::s_pThreadData = nullptr;
60 pthread_key_t threading::pthread::Manager::Holder::m_key;
62 # if CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG
63 __thread threading::gcc_internal::ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) threading::gcc_internal::s_threadData;
64 __thread threading::ThreadData * threading::gcc_internal::s_pThreadData = nullptr;
68 #ifdef CDS_CXX11_THREAD_LOCAL_SUPPORT
69 thread_local threading::cxx11_internal::ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) threading::cxx11_internal::s_threadData;
70 thread_local threading::ThreadData * threading::cxx11_internal::s_pThreadData = nullptr;
74 static atomics::atomic<size_t> s_nInitCallCount(0);
76 bool CDS_EXPORT_API init_first_call()
78 return s_nInitCallCount.fetch_add(1, atomics::memory_order_relaxed) == 0;
81 bool CDS_EXPORT_API fini_last_call()
83 if ( s_nInitCallCount.fetch_sub( 1, atomics::memory_order_relaxed ) == 1 ) {
84 atomics::atomic_thread_fence( atomics::memory_order_release );
89 } // namespace details
92 /*static*/ size_t exponential_runtime_traits::lower_bound = 16;
93 /*static*/ size_t exponential_runtime_traits::upper_bound = 16 * 1024;
95 /*static*/ unsigned delay_runtime_traits::timeout = 5;
96 } // namespace backoff