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-rw-r--r--src/zstd/programs/timefn.c169
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diff --git a/src/zstd/programs/timefn.c b/src/zstd/programs/timefn.c
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+/*
+ * Copyright (c) 2019-2020, Yann Collet, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ * You may select, at your option, one of the above-listed licenses.
+ */
+
+
+/* === Dependencies === */
+
+#include "timefn.h"
+
+
+/*-****************************************
+* Time functions
+******************************************/
+
+#if defined(_WIN32) /* Windows */
+
+#include <stdlib.h> /* abort */
+#include <stdio.h> /* perror */
+
+UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; }
+
+PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
+{
+ static LARGE_INTEGER ticksPerSecond;
+ static int init = 0;
+ if (!init) {
+ if (!QueryPerformanceFrequency(&ticksPerSecond)) {
+ perror("timefn::QueryPerformanceFrequency");
+ abort();
+ }
+ init = 1;
+ }
+ return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
+}
+
+PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
+{
+ static LARGE_INTEGER ticksPerSecond;
+ static int init = 0;
+ if (!init) {
+ if (!QueryPerformanceFrequency(&ticksPerSecond)) {
+ perror("timefn::QueryPerformanceFrequency");
+ abort();
+ }
+ init = 1;
+ }
+ return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
+}
+
+
+
+#elif defined(__APPLE__) && defined(__MACH__)
+
+UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); }
+
+PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
+{
+ static mach_timebase_info_data_t rate;
+ static int init = 0;
+ if (!init) {
+ mach_timebase_info(&rate);
+ init = 1;
+ }
+ return (((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom))/1000ULL;
+}
+
+PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
+{
+ static mach_timebase_info_data_t rate;
+ static int init = 0;
+ if (!init) {
+ mach_timebase_info(&rate);
+ init = 1;
+ }
+ return ((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom);
+}
+
+
+/* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance.
+ Android also lacks it but does define TIME_UTC. */
+#elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \
+ && defined(TIME_UTC) && !defined(__ANDROID__)
+
+#include <stdlib.h> /* abort */
+#include <stdio.h> /* perror */
+
+UTIL_time_t UTIL_getTime(void)
+{
+ /* time must be initialized, othersize it may fail msan test.
+ * No good reason, likely a limitation of timespec_get() for some target */
+ UTIL_time_t time = UTIL_TIME_INITIALIZER;
+ if (timespec_get(&time, TIME_UTC) != TIME_UTC) {
+ perror("timefn::timespec_get");
+ abort();
+ }
+ return time;
+}
+
+static UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end)
+{
+ UTIL_time_t diff;
+ if (end.tv_nsec < begin.tv_nsec) {
+ diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec;
+ diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec;
+ } else {
+ diff.tv_sec = end.tv_sec - begin.tv_sec;
+ diff.tv_nsec = end.tv_nsec - begin.tv_nsec;
+ }
+ return diff;
+}
+
+PTime UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end)
+{
+ UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
+ PTime micro = 0;
+ micro += 1000000ULL * diff.tv_sec;
+ micro += diff.tv_nsec / 1000ULL;
+ return micro;
+}
+
+PTime UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end)
+{
+ UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
+ PTime nano = 0;
+ nano += 1000000000ULL * diff.tv_sec;
+ nano += diff.tv_nsec;
+ return nano;
+}
+
+
+
+#else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */
+
+UTIL_time_t UTIL_getTime(void) { return clock(); }
+PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
+PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
+
+#endif
+
+
+
+/* returns time span in microseconds */
+PTime UTIL_clockSpanMicro(UTIL_time_t clockStart )
+{
+ UTIL_time_t const clockEnd = UTIL_getTime();
+ return UTIL_getSpanTimeMicro(clockStart, clockEnd);
+}
+
+/* returns time span in microseconds */
+PTime UTIL_clockSpanNano(UTIL_time_t clockStart )
+{
+ UTIL_time_t const clockEnd = UTIL_getTime();
+ return UTIL_getSpanTimeNano(clockStart, clockEnd);
+}
+
+void UTIL_waitForNextTick(void)
+{
+ UTIL_time_t const clockStart = UTIL_getTime();
+ UTIL_time_t clockEnd;
+ do {
+ clockEnd = UTIL_getTime();
+ } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0);
+}