1*bb722a7dSDimitry Andric //===-- Definition of macros from sys/time.h ------------------------------===// 2*bb722a7dSDimitry Andric // 3*bb722a7dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bb722a7dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bb722a7dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bb722a7dSDimitry Andric // 7*bb722a7dSDimitry Andric //===----------------------------------------------------------------------===// 8*bb722a7dSDimitry Andric 9*bb722a7dSDimitry Andric #ifndef LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H 10*bb722a7dSDimitry Andric #define LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H 11*bb722a7dSDimitry Andric 12*bb722a7dSDimitry Andric // Add two timevals and put the result in timeval_ptr_result. If the resulting 13*bb722a7dSDimitry Andric // usec value is greater than 999,999 then the microseconds are turned into full 14*bb722a7dSDimitry Andric // seconds (1,000,000 is subtracted from usec and 1 is added to sec). 15*bb722a7dSDimitry Andric #define timeradd(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ 16*bb722a7dSDimitry Andric (timeval_ptr_result)->tv_sec = \ 17*bb722a7dSDimitry Andric (timeval_ptr_a)->tv_sec + (timeval_ptr_b)->tv_sec + \ 18*bb722a7dSDimitry Andric (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 ? 1 \ 19*bb722a7dSDimitry Andric : 0); \ 20*bb722a7dSDimitry Andric (timeval_ptr_result)->tv_usec = \ 21*bb722a7dSDimitry Andric (timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec - \ 22*bb722a7dSDimitry Andric (((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 \ 23*bb722a7dSDimitry Andric ? 1000000 \ 24*bb722a7dSDimitry Andric : 0); 25*bb722a7dSDimitry Andric 26*bb722a7dSDimitry Andric // Subtract two timevals and put the result in timeval_ptr_result. If the 27*bb722a7dSDimitry Andric // resulting usec value is less than 0 then 1,000,000 is added to usec and 1 is 28*bb722a7dSDimitry Andric // subtracted from sec. 29*bb722a7dSDimitry Andric #define timersub(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \ 30*bb722a7dSDimitry Andric (timeval_ptr_result)->tv_sec = \ 31*bb722a7dSDimitry Andric (timeval_ptr_a)->tv_sec - (timeval_ptr_b)->tv_sec - \ 32*bb722a7dSDimitry Andric (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1 : 0); \ 33*bb722a7dSDimitry Andric (timeval_ptr_result)->tv_usec = \ 34*bb722a7dSDimitry Andric (timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec + \ 35*bb722a7dSDimitry Andric (((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1000000 \ 36*bb722a7dSDimitry Andric : 0); 37*bb722a7dSDimitry Andric 38*bb722a7dSDimitry Andric // Reset a timeval to the epoch. 39*bb722a7dSDimitry Andric #define timerclear(timeval_ptr) \ 40*bb722a7dSDimitry Andric (timeval_ptr)->tv_sec = 0; \ 41*bb722a7dSDimitry Andric (timeval_ptr)->tv_usec = 0; 42*bb722a7dSDimitry Andric 43*bb722a7dSDimitry Andric // Determine if a timeval is set to the epoch. 44*bb722a7dSDimitry Andric #define timerisset(timeval_ptr) \ 45*bb722a7dSDimitry Andric (timeval_ptr)->tv_sec != 0 || (timeval_ptr)->tv_usec != 0; 46*bb722a7dSDimitry Andric 47*bb722a7dSDimitry Andric // Compare two timevals using CMP. 48*bb722a7dSDimitry Andric #define timercmp(timeval_ptr_a, timeval_ptr_b, CMP) \ 49*bb722a7dSDimitry Andric (((timeval_ptr_a)->tv_sec == (timeval_ptr_b)->tv_sec) \ 50*bb722a7dSDimitry Andric ? ((timeval_ptr_a)->tv_usec CMP(timeval_ptr_b)->tv_usec) \ 51*bb722a7dSDimitry Andric : ((timeval_ptr_a)->tv_sec CMP(timeval_ptr_b)->tv_sec)) 52*bb722a7dSDimitry Andric 53*bb722a7dSDimitry Andric #endif // LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H 54