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- /* Copyright 2013-2014 Pierre Ossman <ossman@cendio.se> for Cendio AB
- *
- * This 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 software 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #include <stdint.h>
- #include <stdlib.h>
- #include <string.h>
-
- #ifdef WIN32
- #include <windows.h>
- #else
- #include <sys/resource.h>
- #endif
-
- #include "util.h"
-
- #ifdef WIN32
- typedef FILETIME syscounter_t;
- #else
- typedef struct rusage syscounter_t;
- #endif
-
- static syscounter_t _globalCounter[2];
- static cpucounter_t globalCounter = _globalCounter;
-
- void startCpuCounter(void)
- {
- startCpuCounter(globalCounter);
- }
-
- void endCpuCounter(void)
- {
- endCpuCounter(globalCounter);
- }
-
- double getCpuCounter(void)
- {
- return getCpuCounter(globalCounter);
- }
-
- cpucounter_t newCpuCounter(void)
- {
- syscounter_t *c;
-
- c = (syscounter_t*)malloc(sizeof(syscounter_t) * 2);
- if (c == NULL)
- return NULL;
-
- memset(c, 0, sizeof(syscounter_t) * 2);
-
- return c;
- }
-
- void freeCpuCounter(cpucounter_t c)
- {
- free(c);
- }
-
- static void measureCpu(syscounter_t *counter)
- {
- #ifdef WIN32
- FILETIME dummy1, dummy2, dummy3;
-
- GetProcessTimes(GetCurrentProcess(), &dummy1, &dummy2,
- &dummy3, counter);
- #else
- getrusage(RUSAGE_SELF, counter);
- #endif
- }
-
- void startCpuCounter(cpucounter_t c)
- {
- syscounter_t *s = (syscounter_t*)c;
- measureCpu(&s[0]);
- }
-
- void endCpuCounter(cpucounter_t c)
- {
- syscounter_t *s = (syscounter_t*)c;
- measureCpu(&s[1]);
- }
-
- double getCpuCounter(cpucounter_t c)
- {
- syscounter_t *s = (syscounter_t*)c;
- double seconds;
-
- #ifdef WIN32
- uint64_t counters[2];
-
- counters[0] = (uint64_t)s[0].dwHighDateTime << 32 |
- s[0].dwLowDateTime;
- counters[1] = (uint64_t)s[1].dwHighDateTime << 32 |
- s[1].dwLowDateTime;
-
- seconds = (double)(counters[1] - counters[0]) / 10000000.0;
- #else
- seconds = (double)(s[1].ru_utime.tv_sec -
- s[0].ru_utime.tv_sec);
- seconds += (double)(s[1].ru_utime.tv_usec -
- s[0].ru_utime.tv_usec) / 1000000.0;
- #endif
-
- return seconds;
- }
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