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