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117eba02f1
HZ is no longer an accurate scaling factor, and is hardcoded to 100.
runtime/mercury_timing.h:
As above.
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
// vim: ts=4 sw=4 expandtab ft=c
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// Copyright (C) 1993-1995, 1997, 2000, 2006 The University of Melbourne.
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// Copyright (C) 2015-2016, 2018 The Mercury team.
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// This file is distributed under the terms specified in COPYING.LIB.
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// mercury_timing.h - interface to timing routines.
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// Defines `MR_CLOCK_TICKS_PER_SECOND'
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// and `MR_get_user_cpu_milliseconds()'.
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#ifndef MERCURY_TIMING_H
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#define MERCURY_TIMING_H
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#include "mercury_conf.h"
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#ifdef MR_HAVE_SYS_PARAM_H
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#include <sys/param.h> // for HZ
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#endif
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#ifdef MR_HAVE_UNISTD_H
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#include <unistd.h> // for sysconf() and _SC_CLK_TCK
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#endif
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#include <limits.h> // CLK_TCK is defined here, on some systems
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//
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// Get the number of clock ticks per second.
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// It is used when converting a clock_t value to a time in seconds.
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// It may be defined by <sys/time.h>, but if it is not defined there,
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// we may be able to use `sysconf(_SC_CLK_TCK)' or CLOCKS_PER_SEC or
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// CLK_TCK instead.
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#if defined(MR_HAVE_SYSCONF) && defined(_SC_CLK_TCK)
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#define MR_CLOCK_TICKS_PER_SECOND ((int) sysconf(_SC_CLK_TCK))
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#elif defined(CLOCKS_PER_SEC)
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#define MR_CLOCK_TICKS_PER_SECOND CLOCKS_PER_SEC
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#elif defined(CLK_TCK)
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#define MR_CLOCK_TICKS_PER_SECOND CLK_TCK
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#elif defined(HZ)
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#define MR_CLOCK_TICKS_PER_SECOND HZ
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#else
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// just leave it undefined
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#endif
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// MR_get_user_cpu_milliseconds() returns the CPU time consumed by the
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// process, in milliseconds, from an arbitrary initial time.
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extern int MR_get_user_cpu_milliseconds(void);
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// MR_get_real_milliseconds() returns the real time
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// in milliseconds, from an arbitrary initial time.
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extern int MR_get_real_milliseconds(void);
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#endif // MERCURY_TIMING_H
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