1 //===-- Linux implementation of the time 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/time_func.h" 10 11 #include "hdr/time_macros.h" 12 #include "src/__support/common.h" 13 #include "src/__support/macros/config.h" 14 #include "src/__support/time/clock_gettime.h" 15 #include "src/errno/libc_errno.h" 16 17 namespace LIBC_NAMESPACE_DECL { 18 // avoid inconsitent clang-format behavior 19 using time_ptr_t = time_t *; 20 LLVM_LIBC_FUNCTION(time_t, time, (time_ptr_t tp)) { 21 struct timespec ts; 22 auto result = internal::clock_gettime(CLOCK_REALTIME, &ts); 23 if (!result.has_value()) { 24 libc_errno = result.error(); 25 return -1; 26 } 27 28 if (tp != nullptr) 29 *tp = time_t(ts.tv_sec); 30 return time_t(ts.tv_sec); 31 } 32 33 } // namespace LIBC_NAMESPACE_DECL 34