1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
/* meter.h: METER INTERFACE
 *
 * $Id: //info.ravenbrook.com/project/mps/custom/cet/main/code/meter.h#3 $
 * Copyright (c) 2001-2014 Ravenbrook Limited.  See end of file for license.
 *
 * .sources: mps.design.metrics.
 *
 * .purpose: Defines an interface for creating "meters" that accumulate
 * the number, total and mean^2 of a set of data points.  These
 * accumulators can be used to report on the number, total, average, and
 * variance of the data set.
 */

#ifndef meter_h
#define meter_h

#include "mpmtypes.h"
#include "config.h"
#include "misc.h"
#include "mpslib.h"


typedef struct MeterStruct *Meter;

typedef struct MeterStruct
{
  const char *name;
  Count count;
  double total;
  double meanSquared;
  Size min;
  Size max;
} MeterStruct;


extern void MeterInit(Meter meter, const char *name, void *owner);
extern void MeterAccumulate(Meter meter, Size amount);
extern Res MeterWrite(Meter meter, mps_lib_FILE *stream, Count depth);
extern void MeterEmit(Meter meter);

#define METER_DECL(meter) STATISTIC_DECL(struct MeterStruct meter)
#define METER_INIT(meter, init, owner) \
  BEGIN STATISTIC(MeterInit(&(meter), init, owner)); UNUSED(owner); END
/* Hack: owner is typically only used for MeterInit */
#define METER_ACC(meter, delta) \
  STATISTIC(MeterAccumulate(&(meter), delta))
#if defined(STATISTICS)
#define METER_WRITE(meter, stream, depth) BEGIN \
    Res _res = MeterWrite(&(meter), (stream), (depth)); \
    if (_res != ResOK) return _res; \
  END
#elif defined(STATISTICS_NONE)
#define METER_WRITE(meter, stream, depth) NOOP
#else
#error "No statistics configured."
#endif
#define METER_EMIT(meter) STATISTIC(MeterEmit(meter))


#endif /* meter_h */


/* C. COPYRIGHT AND LICENSE
 *
 * Copyright (C) 2001-2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
 * All rights reserved.  This is an open source license.  Contact
 * Ravenbrook for commercial licensing options.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * 3. Redistributions in any form must be accompanied by information on how
 * to obtain complete source code for this software and any accompanying
 * software that uses this software.  The source code must either be
 * included in the distribution or be available for no more than the cost
 * of distribution plus a nominal fee, and must be freely redistributable
 * under reasonable conditions.  For an executable file, complete source
 * code means the source code for all modules it contains. It does not
 * include source code for modules or files that typically accompany the
 * major components of the operating system on which the executable file
 * runs.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */