external/public-domain/xz/dist/src/common/mythread.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       mythread.h
   4 /// \brief      Wrappers for threads
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #include "sysdefs.h"
  14
  15
  16 #ifdef HAVE_PTHREAD
  17 #       include <pthread.h>
  18
  19 #       define mythread_once(func) \
  20         do { \
  21                 static pthread_once_t once_ = PTHREAD_ONCE_INIT; \
  22                 pthread_once(&once_, &func); \
  23         } while (0)
  24
  25 #       define mythread_sigmask(how, set, oset) \
  26                 pthread_sigmask(how, set, oset)
  27
  28 #else
  29
  30 #       define mythread_once(func) \
  31         do { \
  32                 static bool once_ = false; \
  33                 if (!once_) { \
  34                         func(); \
  35                         once_ = true; \
  36                 } \
  37         } while (0)
  38
  39 #       define mythread_sigmask(how, set, oset) \
  40                 sigprocmask(how, set, oset)
  41
  42 #endif