libc/src/__support/threads/callonce.h

   1 //===-- Types related to the callonce 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 #ifndef LLVM_LIBC_SRC___SUPPORT_THREADS_CALLONCE_H
  10 #define LLVM_LIBC_SRC___SUPPORT_THREADS_CALLONCE_H
  11
  12 namespace LIBC_NAMESPACE {
  13
  14 struct CallOnceFlag;
  15 using CallOnceCallback = void(void);
  16
  17 int callonce(CallOnceFlag *flag, CallOnceCallback *callback);
  18
  19 } // namespace LIBC_NAMESPACE
  20
  21 #endif // LLVM_LIBC_SRC___SUPPORT_THREADS_CALLONCE_H