src/init.cpp

   1 //$$CDS-header$$
   2
   3 #include <cds/init.h>
   4 #include <cds/algo/atomic.h>
   5
   6 #if CDS_OS_INTERFACE == CDS_OSI_WINDOWS && CDS_OS_TYPE != CDS_OS_MINGW
   7 #   if CDS_COMPILER == CDS_COMPILER_MSVC || CDS_COMPILER == CDS_COMPILER_INTEL
   8 #       include <cds/threading/details/msvc_manager.h>
   9 #   endif
  10 #   include <cds/threading/details/wintls_manager.h>
  11 #else   // CDS_OS_INTERFACE != CDS_OSI_WINDOWS
  12 #   if CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG || CDS_COMPILER == CDS_COMPILER_INTEL
  13 #       include <cds/threading/details/gcc_manager.h>
  14 #   endif
  15 #   include <cds/threading/details/pthread_manager.h>
  16 #endif
  17
  18 #ifdef CDS_CXX11_THREAD_LOCAL_SUPPORT
  19 #   include <cds/threading/details/cxx11_manager.h>
  20 #endif
  21
  22 namespace cds {
  23
  24     CDS_EXPORT_API atomics::atomic<size_t> threading::ThreadData::s_nLastUsedProcNo(0);
  25     CDS_EXPORT_API size_t threading::ThreadData::s_nProcCount = 1;
  26
  27 #if CDS_OS_INTERFACE == CDS_OSI_WINDOWS && CDS_OS_TYPE != CDS_OS_MINGW
  28     CDS_EXPORT_API DWORD cds::threading::wintls::Manager::Holder::m_key = TLS_OUT_OF_INDEXES;
  29
  30     __declspec( thread ) threading::msvc_internal::ThreadDataPlaceholder threading::msvc_internal::s_threadData;
  31     __declspec(thread) threading::ThreadData * threading::msvc_internal::s_pThreadData = nullptr;
  32
  33 #else
  34     pthread_key_t threading::pthread::Manager::Holder::m_key;
  35
  36 #   if CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG
  37         __thread threading::gcc_internal::ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) threading::gcc_internal::s_threadData;
  38         __thread threading::ThreadData * threading::gcc_internal::s_pThreadData = nullptr;
  39 #   endif
  40 #endif
  41
  42 #ifdef CDS_CXX11_THREAD_LOCAL_SUPPORT
  43     thread_local threading::cxx11_internal::ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) threading::cxx11_internal::s_threadData;
  44     thread_local threading::ThreadData * threading::cxx11_internal::s_pThreadData = nullptr;
  45 #endif
  46
  47     namespace details {
  48         static atomics::atomic<size_t> s_nInitCallCount(0);
  49
  50         bool CDS_EXPORT_API init_first_call()
  51         {
  52             return s_nInitCallCount.fetch_add(1, atomics::memory_order_relaxed) == 0;
  53         }
  54
  55         bool CDS_EXPORT_API fini_last_call()
  56         {
  57             if ( s_nInitCallCount.fetch_sub( 1, atomics::memory_order_relaxed ) == 1 ) {
  58                 atomics::atomic_thread_fence( atomics::memory_order_release );
  59                 return true;
  60             }
  61             return false;
  62         }
  63     } // namespace details
  64
  65 }   // namespace cds