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/macros/config.h" 12 #include "src/__support/threads/callonce.h" 13 14 #include <pthread.h> // For pthread_once_t and __pthread_once_func_t definitions. 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 LLVM_LIBC_FUNCTION(int, pthread_once, 19 (pthread_once_t * flag, __pthread_once_func_t func)) { 20 return callonce(reinterpret_cast<CallOnceFlag *>(flag), 21 reinterpret_cast<CallOnceCallback *>(func)); 22 } 23 24 } // namespace LIBC_NAMESPACE_DECL 25