libc/src/threads/call_once.cpp

   1 //===-- Linux implementation of the call_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 "src/threads/call_once.h"
  10 #include "src/__support/common.h"
  11 #include "src/__support/macros/config.h"
  12 #include "src/__support/threads/callonce.h"
  13
  14 #include <threads.h> // For once_flag and __call_once_func_t definitions.
  15
  16 namespace LIBC_NAMESPACE_DECL {
  17
  18 LLVM_LIBC_FUNCTION(void, call_once,
  19                    (once_flag * flag, __call_once_func_t func)) {
  20   callonce(reinterpret_cast<CallOnceFlag *>(flag),
  21            reinterpret_cast<CallOnceCallback *>(func));
  22 }
  23
  24 } // namespace LIBC_NAMESPACE_DECL