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//===-- 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
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