54 lines
3.0 KiB
C
54 lines
3.0 KiB
C
//===-- Definition of macros from sys/time.h ------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef __LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H
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#define __LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H
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// Add two timevals and put the result in timeval_ptr_result. If the resulting
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// usec value is greater than 999,999 then the microseconds are turned into full
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// seconds (1,000,000 is subtracted from usec and 1 is added to sec).
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#define timeradd(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \
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(timeval_ptr_result)->tv_sec = \
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(timeval_ptr_a)->tv_sec + (timeval_ptr_b)->tv_sec + \
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(((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 ? 1 \
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: 0); \
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(timeval_ptr_result)->tv_usec = \
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(timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec - \
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(((timeval_ptr_a)->tv_usec + (timeval_ptr_b)->tv_usec) >= 1000000 \
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? 1000000 \
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: 0);
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// Subtract two timevals and put the result in timeval_ptr_result. If the
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// resulting usec value is less than 0 then 1,000,000 is added to usec and 1 is
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// subtracted from sec.
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#define timersub(timeval_ptr_a, timeval_ptr_b, timeval_ptr_result) \
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(timeval_ptr_result)->tv_sec = \
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(timeval_ptr_a)->tv_sec - (timeval_ptr_b)->tv_sec - \
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(((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1 : 0); \
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(timeval_ptr_result)->tv_usec = \
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(timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec + \
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(((timeval_ptr_a)->tv_usec - (timeval_ptr_b)->tv_usec) < 0 ? 1000000 \
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: 0);
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// Reset a timeval to the epoch.
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#define timerclear(timeval_ptr) \
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(timeval_ptr)->tv_sec = 0; \
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(timeval_ptr)->tv_usec = 0;
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// Determine if a timeval is set to the epoch.
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#define timerisset(timeval_ptr) \
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(timeval_ptr)->tv_sec != 0 || (timeval_ptr)->tv_usec != 0;
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// Compare two timevals using CMP.
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#define timercmp(timeval_ptr_a, timeval_ptr_b, CMP) \
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(((timeval_ptr_a)->tv_sec == (timeval_ptr_b)->tv_sec) \
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? ((timeval_ptr_a)->tv_usec CMP(timeval_ptr_b)->tv_usec) \
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: ((timeval_ptr_a)->tv_sec CMP(timeval_ptr_b)->tv_sec))
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#endif // __LLVM_LIBC_MACROS_LINUX_SYS_TIME_MACROS_H
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