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/*
* List Windows performance counters on the current platform.
*
* Copyright (c) 2006, Ken McDonell. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <windows.h>
#include <pdh.h>
#include <pdhmsg.h>
#include <stdio.h>
#include <stdlib.h>
static int verbose;
extern char *pdherrstr(int);
#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
void
expand(char *pat)
{
LPTSTR ptr;
LPSTR buf = NULL;
DWORD bufsz = 0;
int i;
PDH_STATUS pdhsts;
// Iterate because size grows in first couple of attempts!
for (i = 0; i < 5; i++) {
if (bufsz && (buf = (LPSTR)malloc(bufsz)) == NULL) {
fprintf(stderr, "malloc %ld failed for pattern: %s\n", bufsz, pat);
return;
}
if (verbose)
fprintf(stderr, "ExpandCounters pattern: %s\n", pat);
if ((pdhsts = PdhExpandCounterPathA(pat, buf, &bufsz)) == PDH_MORE_DATA) {
// bufsz has the required length (minus the last NULL)
bufsz = roundup(bufsz + 1, 64);
free(buf);
}
else
break;
}
if (pdhsts == PDH_CSTATUS_VALID_DATA) {
// success, print all counters
ptr = buf;
while (*ptr) {
printf("%s\n", ptr);
ptr += strlen(ptr) + 1;
}
}
else {
fprintf(stderr, "PdhExpandCounterPathA failed: %s\n", pdherrstr(pdhsts));
if (pdhsts == PDH_MORE_DATA)
fprintf(stderr, "still need to resize buffer to %ld\n", bufsz);
}
fflush(stderr);
fflush(stdin);
}
int
main(int argc, char **argv)
{
int i;
if (argc == 1) {
expand("\\*\\*");
expand("\\*(*)\\*");
return 0;
}
for (i = 1; i < argc; i++)
expand(argv[i]);
return 0;
}
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