memory/build/Mutex.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "Mutex.h"
   6
   7 #if defined(XP_DARWIN)
   8
   9 // static
  10 bool Mutex::SpinInKernelSpace() {
  11 #  ifdef __aarch64__
  12   return true;
  13 #  else
  14   if (__builtin_available(macOS 10.15, *)) {
  15     return true;
  16   }
  17
  18   return false;
  19 #  endif
  20 }
  21
  22 // static
  23 const bool Mutex::gSpinInKernelSpace = SpinInKernelSpace();
  24
  25 #endif  // defined(XP_DARWIN)