WDL/wdlatomic.h

   1 #ifndef _WDL_ATOMIC_H_
   2 #define _WDL_ATOMIC_H_
   3
   4 #ifdef _WIN32
   5
   6 static int wdl_atomic_incr(int *v) { return (int) InterlockedIncrement((LONG *)v); }
   7 static int wdl_atomic_decr(int *v) { return (int) InterlockedDecrement((LONG *)v); }
   8
   9 #elif !defined(__ppc__) && (defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2))))
  10
  11 static int wdl_atomic_incr(int *v) { return __sync_add_and_fetch(v,1); }
  12 static int wdl_atomic_decr(int *v) { return __sync_add_and_fetch(v,~0); }
  13
  14 #elif defined(__APPLE__)
  15 // used by GCC < 4.2 on OSX
  16 #include <libkern/OSAtomic.h>
  17
  18 static int wdl_atomic_incr(int *v) { return (int) OSAtomicIncrement32Barrier((int32_t*)v); }
  19 static int wdl_atomic_decr(int *v) { return (int) OSAtomicDecrement32Barrier((int32_t*)v); }
  20 #else
  21
  22 // unsupported!
  23 #pragma message("Need win32 or apple or gcc 4.2+ for wdlatomic.h, doh")
  24
  25 #endif
  26
  27 #endif