1 //===---------- Linux implementation of the POSIX clock_gettime 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/time/clock_gettime.h" 10 #include "src/__support/common.h" 11 #include "src/__support/macros/config.h" 12 #include "src/__support/time/linux/clock_gettime.h" 13 #include "src/errno/libc_errno.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 // TODO(michaelrj): Move this into time/linux with the other syscalls. 18 LLVM_LIBC_FUNCTION(int, clock_gettime, 19 (clockid_t clockid, struct timespec *ts)) { 20 auto result = internal::clock_gettime(clockid, ts); 21 22 // A negative return value indicates an error with the magnitude of the 23 // value being the error code. 24 if (!result.has_value()) { 25 libc_errno = result.error(); 26 return -1; 27 } 28 return 0; 29 } 30 31 } // namespace LIBC_NAMESPACE_DECL 32