src/init.cpp

   1 /*
   2     This file is a part of libcds - Concurrent Data Structures library
   3
   4     (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
   5
   6     Source code repo: http://github.com/khizmax/libcds/
   7     Download: http://sourceforge.net/projects/libcds/files/
   8
   9     Redistribution and use in source and binary forms, with or without
  10     modification, are permitted provided that the following conditions are met:
  11
  12     * Redistributions of source code must retain the above copyright notice, this
  13       list of conditions and the following disclaimer.
  14
  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.
  18
  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.
  29 */
  30
  31 #include <cds/init.h>
  32 #include <cds/algo/atomic.h>
  33 #include <cds/algo/backoff_strategy.h>
  34
  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>
  38 #   endif
  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>
  43 #   endif
  44 #   include <cds/threading/details/pthread_manager.h>
  45 #endif
  46
  47 #ifdef CDS_CXX11_THREAD_LOCAL_SUPPORT
  48 #   include <cds/threading/details/cxx11_manager.h>
  49 #endif
  50
  51 namespace cds {
  52
  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;
  58 #   endif
  59 #else
  60     pthread_key_t threading::pthread::Manager::Holder::m_key;
  61
  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;
  65 #   endif
  66 #endif
  67
  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;
  71 #endif
  72
  73     namespace details {
  74         static atomics::atomic<size_t> s_nInitCallCount(0);
  75
  76         bool CDS_EXPORT_API init_first_call()
  77         {
  78             return s_nInitCallCount.fetch_add(1, atomics::memory_order_relaxed) == 0;
  79         }
  80
  81         bool CDS_EXPORT_API fini_last_call()
  82         {
  83             if ( s_nInitCallCount.fetch_sub( 1, atomics::memory_order_relaxed ) == 1 ) {
  84                 atomics::atomic_thread_fence( atomics::memory_order_release );
  85                 return true;
  86             }
  87             return false;
  88         }
  89     } // namespace details
  90
  91     namespace backoff {
  92         /*static*/ size_t exponential_runtime_traits::lower_bound = 16;
  93         /*static*/ size_t exponential_runtime_traits::upper_bound = 16 * 1024;
  94
  95         /*static*/ unsigned delay_runtime_traits::timeout = 5;
  96     } // namespace backoff
  97
  98 }   // namespace cds