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| 1 | //===-- Definition of macros from sys/time.h ------------------------------===// |
|---|---|
| 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_MACROS_LINUX_SYS_TIME_MACROS_H |
| 10 | #define LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H |
| 11 | |
| 12 | // Add two timevals and put the result in timeval_ptr_result. If the resulting |
| 13 | // usec value is greater than 999,999 then the microseconds are turned into full |
| 14 | // seconds (1,000,000 is subtracted from usec and 1 is added to sec). |
| 15 | #define timeradd(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ |
| 16 | (timeval_ptr_result)->tv_sec = \ |
| 17 | (timeval_ptr_a)->tv_sec + (timeval_ptr_b)->tv_sec + \ |
| 18 | (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 ? 1 \ |
| 19 | : 0); \ |
| 20 | (timeval_ptr_result)->tv_usec = \ |
| 21 | (timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec - \ |
| 22 | (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 \ |
| 23 | ? 1000000 \ |
| 24 | : 0); |
| 25 | |
| 26 | // Subtract two timevals and put the result in timeval_ptr_result. If the |
| 27 | // resulting usec value is less than 0 then 1,000,000 is added to usec and 1 is |
| 28 | // subtracted from sec. |
| 29 | #define timersub(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ |
| 30 | (timeval_ptr_result)->tv_sec = \ |
| 31 | (timeval_ptr_a)->tv_sec - (timeval_ptr_b)->tv_sec - \ |
| 32 | (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1 : 0); \ |
| 33 | (timeval_ptr_result)->tv_usec = \ |
| 34 | (timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec + \ |
| 35 | (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1000000 \ |
| 36 | : 0); |
| 37 | |
| 38 | // Reset a timeval to the epoch. |
| 39 | #define timerclear(timeval_ptr) \ |
| 40 | (timeval_ptr)->tv_sec = 0; \ |
| 41 | (timeval_ptr)->tv_usec = 0; |
| 42 | |
| 43 | // Determine if a timeval is set to the epoch. |
| 44 | #define timerisset(timeval_ptr) \ |
| 45 | (timeval_ptr)->tv_sec != 0 || (timeval_ptr)->tv_usec != 0; |
| 46 | |
| 47 | // Compare two timevals using CMP. |
| 48 | #define timercmp(timeval_ptr_a, timeval_ptr_b, CMP) \ |
| 49 | (((timeval_ptr_a)->tv_sec == (timeval_ptr_b)->tv_sec) \ |
| 50 | ? ((timeval_ptr_a)->tv_usec CMP(timeval_ptr_b)->tv_usec) \ |
| 51 | : ((timeval_ptr_a)->tv_sec CMP(timeval_ptr_b)->tv_sec)) |
| 52 | |
| 53 | #endif // LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H |
| 54 |
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