/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
 * Copyright (c) 1999-2001 Carnegie Mellon University.  All rights
 * reserved.
 *
 * 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.
 *
 * This work was supported in part by funding from the Defense Advanced 
 * Research Projects Agency and the National Science Foundation of the 
 * United States of America, and the CMU Sphinx Speech Consortium.
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
 * NOR ITS EMPLOYEES 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.
 *
 * ====================================================================
 *
 */
/*
 * profile.c -- For timing and event counting.
 *
 * **********************************************
 * CMU ARPA Speech Project
 *
 * Copyright (c) 1999 Carnegie Mellon University.
 * ALL RIGHTS RESERVED.
 * **********************************************
 * 
 * HISTORY
 * $Log: profile.c,v $
 * Revision 1.7  2005/06/22 03:10:59  arthchan2003
 * 1, Fixed doxygen documentation, 2, Added  keyword.
 *
 * Revision 1.3  2005/03/30 01:22:48  archan
 * Fixed mistakes in last updates. Add
 *
 * 
 * 11-Mar-1999	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
 * 		Added ptmr_init().
 * 
 * 19-Jun-97	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
 * 		Created.
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#if defined(HAVE_UNISTD_H) /* I know this, this is Unix... */
# include <unistd.h>
# include <sys/time.h>
# include <sys/resource.h>
#elif defined(_WIN32)
# include <windows.h>
# ifndef _WIN32_WCE
#  include <time.h>
# endif
#endif

#ifdef _MSC_VER
#pragma warning (disable: 4996)
#endif

#include "profile.h"
#include "err.h"
#include "ckd_alloc.h"

#ifdef _WIN32_WCE
DWORD unlink(const char *filename)
{
	WCHAR *wfilename;
	DWORD rv;
	size_t len;

	len = mbstowcs(NULL, filename, 0);
	wfilename = ckd_calloc(len+1, sizeof(*wfilename));
	mbstowcs(wfilename, filename, len);
	rv = DeleteFile(wfilename);
	ckd_free(wfilename);

	return rv;
}
#endif

pctr_t *
pctr_new(char *nm)
{
    pctr_t *pc;

    pc = ckd_calloc(1, sizeof(pctr_t));
    pc->name = ckd_salloc(nm);
    pc->count = 0;

    return pc;
}

void
pctr_reset(pctr_t * ctr)
{
    ctr->count = 0;
}


void
pctr_increment(pctr_t * ctr, int32 inc)
{
    ctr->count += inc;
    /*   E_INFO("Name %s, Count %d, inc %d\n",ctr->name, ctr->count, inc); */
}

void
pctr_print(FILE * fp, pctr_t * ctr)
{
    fprintf(fp, "CTR:");
    fprintf(fp, "[%d %s]", ctr->count, ctr->name);
}

void
pctr_free(pctr_t * pc)
{
    if (pc) {
        if (pc->name)
            ckd_free(pc->name);
    }
    ckd_free(pc);
}


#if (WIN32) && !defined(GNUWINCE)

#define TM_LOWSCALE	1e-7
#define TM_HIGHSCALE	(4294967296.0 * TM_LOWSCALE);

static float64
make_sec(FILETIME * tm)
{
    float64 dt;

    dt = tm->dwLowDateTime * TM_LOWSCALE;
    dt += tm->dwHighDateTime * TM_HIGHSCALE;

    return (dt);
}

#else /* NOT WINDOWS */

static float64
make_sec(struct timeval *s)
{
    return (s->tv_sec + s->tv_usec * 0.000001);
}

#endif


void
ptmr_start(ptmr_t * tm)
{
#if (! WIN32) || defined(GNUWINCE)
    struct timeval e_start;     /* Elapsed time */

#if (! _HPUX_SOURCE)
    struct rusage start;        /* CPU time */

    /* Unix but not HPUX */
    getrusage(RUSAGE_SELF, &start);
    tm->start_cpu = make_sec(&start.ru_utime) + make_sec(&start.ru_stime);
#endif
    /* Unix + HP */
    gettimeofday(&e_start, 0);
    tm->start_elapsed = make_sec(&e_start);
#elif defined(_WIN32_WCE)
    /* No GetProcessTimes() on WinCE.  (Note CPU time will be bogus) */
    tm->start_cpu = GetTickCount() / 1000;
    tm->start_elapsed = GetTickCount() / 1000;
#else
    HANDLE pid;
    FILETIME t_create, t_exit, kst, ust;

    /* PC */
    pid = GetCurrentProcess();
    GetProcessTimes(pid, &t_create, &t_exit, &kst, &ust);
    tm->start_cpu = make_sec(&ust) + make_sec(&kst);

    tm->start_elapsed = (float64) clock() / CLOCKS_PER_SEC;
#endif
}


void
ptmr_stop(ptmr_t * tm)
{
    float64 dt_cpu, dt_elapsed;

#if (! WIN32) || defined(GNUWINCE)
    struct timeval e_stop;      /* Elapsed time */

#if (! _HPUX_SOURCE)
    struct rusage stop;         /* CPU time */

    /* Unix but not HPUX */
    getrusage(RUSAGE_SELF, &stop);
    dt_cpu =
        make_sec(&stop.ru_utime) + make_sec(&stop.ru_stime) -
        tm->start_cpu;
#else
    dt_cpu = 0.0;
#endif
    /* Unix + HP */
    gettimeofday(&e_stop, 0);
    dt_elapsed = (make_sec(&e_stop) - tm->start_elapsed);
#elif defined(_WIN32_WCE)
	/* No GetProcessTimes() on WinCE.  (Note CPU time will be bogus) */
	dt_cpu = GetTickCount() / 1000 - tm->start_cpu;
	dt_elapsed = GetTickCount() / 1000 - tm->start_elapsed;
#else
    HANDLE pid;
    FILETIME t_create, t_exit, kst, ust;

    /* PC */
    pid = GetCurrentProcess();
    GetProcessTimes(pid, &t_create, &t_exit, &kst, &ust);
    dt_cpu = make_sec(&ust) + make_sec(&kst) - tm->start_cpu;
    dt_elapsed = ((float64) clock() / CLOCKS_PER_SEC) - tm->start_elapsed;
#endif

    tm->t_cpu += dt_cpu;
    tm->t_elapsed += dt_elapsed;

    tm->t_tot_cpu += dt_cpu;
    tm->t_tot_elapsed += dt_elapsed;
}


void
ptmr_reset(ptmr_t * tm)
{
    tm->t_cpu = 0.0;
    tm->t_elapsed = 0.0;
}


void
ptmr_init(ptmr_t * tm)
{
    tm->t_cpu = 0.0;
    tm->t_elapsed = 0.0;
    tm->t_tot_cpu = 0.0;
    tm->t_tot_elapsed = 0.0;
}


void
ptmr_reset_all(ptmr_t * tm)
{
    for (; tm->name; tm++)
        ptmr_reset(tm);
}


void
ptmr_print_all(FILE * fp, ptmr_t * tm, float64 norm)
{
    if (norm != 0.0) {
        norm = 1.0 / norm;
        for (; tm->name; tm++)
            fprintf(fp, "  %6.2fx %s", tm->t_cpu * norm, tm->name);
    }
}


int32
host_endian(void)
{
    FILE *fp;
    int32 BYTE_ORDER_MAGIC;
    char *file;
    char buf[8];
    int32 k, endian;

    file = "/tmp/__EnDiAn_TeSt__";

    if ((fp = fopen(file, "wb")) == NULL) {
        E_ERROR("fopen(%s,wb) failed\n", file);
        return -1;
    }

    BYTE_ORDER_MAGIC = (int32) 0x11223344;

    k = (int32) BYTE_ORDER_MAGIC;
    if (fwrite(&k, sizeof(int32), 1, fp) != 1) {
        E_ERROR("fwrite(%s) failed\n", file);
        fclose(fp);
        unlink(file);
        return -1;
    }

    fclose(fp);
    if ((fp = fopen(file, "rb")) == NULL) {
        E_ERROR("fopen(%s,rb) failed\n", file);
        unlink(file);
        return -1;
    }
    if (fread(buf, 1, sizeof(int32), fp) != sizeof(int32)) {
        E_ERROR("fread(%s) failed\n", file);
        fclose(fp);
        unlink(file);
        return -1;
    }
    fclose(fp);
    unlink(file);

    /* If buf[0] == lsB of BYTE_ORDER_MAGIC, we are little-endian */
    endian = (buf[0] == (BYTE_ORDER_MAGIC & 0x000000ff)) ? 1 : 0;

    return (endian);
}
