libc/src/pthread/pthread_once.cpp

   1 //===-- Linux implementation of the pthread_once function -----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "pthread_once.h"
  10 #include "src/__support/common.h"
  11 #include "src/__support/threads/callonce.h"
  12
  13 #include <pthread.h> // For pthread_once_t and __pthread_once_func_t definitions.
  14
  15 namespace __llvm_libc {
  16
  17 LLVM_LIBC_FUNCTION(int, pthread_once,
  18                    (pthread_once_t * flag, __pthread_once_func_t func)) {
  19   return callonce(reinterpret_cast<CallOnceFlag *>(flag),
  20                   reinterpret_cast<CallOnceCallback *>(func));
  21 }
  22
  23 } // namespace __llvm_libc