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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H10#define LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H11 12// Add two timevals and put the result in timeval_ptr_result. If the resulting13// usec value is greater than 999,999 then the microseconds are turned into full14// 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 the27// resulting usec value is less than 0 then 1,000,000 is added to usec and 1 is28// 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_H54