| //===-- Definition of macros from sys/time.h ------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H |
| #define LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H |
| |
| // Add two timevals and put the result in timeval_ptr_result. If the resulting |
| // usec value is greater than 999,999 then the microseconds are turned into full |
| // seconds (1,000,000 is subtracted from usec and 1 is added to sec). |
| #define timeradd(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ |
| (timeval_ptr_result)->tv_sec = \ |
| (timeval_ptr_a)->tv_sec + (timeval_ptr_b)->tv_sec + \ |
| (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 ? 1 \ |
| : 0); \ |
| (timeval_ptr_result)->tv_usec = \ |
| (timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec - \ |
| (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 \ |
| ? 1000000 \ |
| : 0); |
| |
| // Subtract two timevals and put the result in timeval_ptr_result. If the |
| // resulting usec value is less than 0 then 1,000,000 is added to usec and 1 is |
| // subtracted from sec. |
| #define timersub(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ |
| (timeval_ptr_result)->tv_sec = \ |
| (timeval_ptr_a)->tv_sec - (timeval_ptr_b)->tv_sec - \ |
| (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1 : 0); \ |
| (timeval_ptr_result)->tv_usec = \ |
| (timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec + \ |
| (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1000000 \ |
| : 0); |
| |
| // Reset a timeval to the epoch. |
| #define timerclear(timeval_ptr) \ |
| (timeval_ptr)->tv_sec = 0; \ |
| (timeval_ptr)->tv_usec = 0; |
| |
| // Determine if a timeval is set to the epoch. |
| #define timerisset(timeval_ptr) \ |
| (timeval_ptr)->tv_sec != 0 || (timeval_ptr)->tv_usec != 0; |
| |
| // Compare two timevals using CMP. |
| #define timercmp(timeval_ptr_a, timeval_ptr_b, CMP) \ |
| (((timeval_ptr_a)->tv_sec == (timeval_ptr_b)->tv_sec) \ |
| ? ((timeval_ptr_a)->tv_usec CMP(timeval_ptr_b)->tv_usec) \ |
| : ((timeval_ptr_a)->tv_sec CMP(timeval_ptr_b)->tv_sec)) |
| |
| #endif // LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H |