diff options
Diffstat (limited to 'libs/libcurl/src/curlx/timeval.c')
| -rw-r--r-- | libs/libcurl/src/curlx/timeval.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/libs/libcurl/src/curlx/timeval.c b/libs/libcurl/src/curlx/timeval.c new file mode 100644 index 0000000000..e6739b50b3 --- /dev/null +++ b/libs/libcurl/src/curlx/timeval.c @@ -0,0 +1,259 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+#include "timeval.h"
+
+#ifdef _WIN32
+
+#include <curl/curl.h>
+#include "version_win32.h"
+#include "../system_win32.h"
+
+LARGE_INTEGER Curl_freq;
+bool Curl_isVistaOrGreater;
+
+/* For tool or tests, we must initialize before calling curlx_now().
+ Providing this function here is wrong. */
+void curlx_now_init(void)
+{
+ if(curlx_verify_windows_version(6, 0, 0, PLATFORM_WINNT,
+ VERSION_GREATER_THAN_EQUAL))
+ Curl_isVistaOrGreater = true;
+ else
+ Curl_isVistaOrGreater = false;
+
+ QueryPerformanceFrequency(&Curl_freq);
+}
+
+/* In case of bug fix this function has a counterpart in tool_util.c */
+struct curltime curlx_now(void)
+{
+ struct curltime now;
+ bool isVistaOrGreater;
+ isVistaOrGreater = Curl_isVistaOrGreater;
+ if(isVistaOrGreater) { /* QPC timer might have issues pre-Vista */
+ LARGE_INTEGER count;
+ LARGE_INTEGER freq;
+ freq = Curl_freq;
+ DEBUGASSERT(freq.QuadPart);
+ QueryPerformanceCounter(&count);
+ now.tv_sec = (time_t)(count.QuadPart / freq.QuadPart);
+ now.tv_usec = (int)((count.QuadPart % freq.QuadPart) * 1000000 /
+ freq.QuadPart);
+ }
+ else {
+ /* Disable /analyze warning that GetTickCount64 is preferred */
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:28159)
+#endif
+ DWORD milliseconds = GetTickCount();
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+ now.tv_sec = (time_t)(milliseconds / 1000);
+ now.tv_usec = (int)((milliseconds % 1000) * 1000);
+ }
+ return now;
+}
+
+#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) || \
+ defined(HAVE_CLOCK_GETTIME_MONOTONIC_RAW)
+
+struct curltime curlx_now(void)
+{
+ /*
+ ** clock_gettime() is granted to be increased monotonically when the
+ ** monotonic clock is queried. Time starting point is unspecified, it
+ ** could be the system start-up time, the Epoch, or something else,
+ ** in any case the time starting point does not change once that the
+ ** system has started up.
+ */
+#ifdef HAVE_GETTIMEOFDAY
+ struct timeval now;
+#endif
+ struct curltime cnow;
+ struct timespec tsnow;
+
+ /*
+ ** clock_gettime() may be defined by Apple's SDK as weak symbol thus
+ ** code compiles but fails during runtime if clock_gettime() is
+ ** called on unsupported OS version.
+ */
+#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
+ (HAVE_BUILTIN_AVAILABLE == 1)
+ bool have_clock_gettime = FALSE;
+ if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *))
+ have_clock_gettime = TRUE;
+#endif
+
+#ifdef HAVE_CLOCK_GETTIME_MONOTONIC_RAW
+ if(
+#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
+ (HAVE_BUILTIN_AVAILABLE == 1)
+ have_clock_gettime &&
+#endif
+ (0 == clock_gettime(CLOCK_MONOTONIC_RAW, &tsnow))) {
+ cnow.tv_sec = tsnow.tv_sec;
+ cnow.tv_usec = (int)(tsnow.tv_nsec / 1000);
+ }
+ else
+#endif
+
+ if(
+#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
+ (HAVE_BUILTIN_AVAILABLE == 1)
+ have_clock_gettime &&
+#endif
+ (0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) {
+ cnow.tv_sec = tsnow.tv_sec;
+ cnow.tv_usec = (int)(tsnow.tv_nsec / 1000);
+ }
+ /*
+ ** Even when the configure process has truly detected monotonic clock
+ ** availability, it might happen that it is not actually available at
+ ** runtime. When this occurs simply fallback to other time source.
+ */
+#ifdef HAVE_GETTIMEOFDAY
+ else {
+ (void)gettimeofday(&now, NULL);
+ cnow.tv_sec = now.tv_sec;
+ cnow.tv_usec = (int)now.tv_usec;
+ }
+#else
+ else {
+ cnow.tv_sec = time(NULL);
+ cnow.tv_usec = 0;
+ }
+#endif
+ return cnow;
+}
+
+#elif defined(HAVE_MACH_ABSOLUTE_TIME)
+
+#include <stdint.h>
+#include <mach/mach_time.h>
+
+struct curltime curlx_now(void)
+{
+ /*
+ ** Monotonic timer on macOS is provided by mach_absolute_time(), which
+ ** returns time in Mach "absolute time units," which are platform-dependent.
+ ** To convert to nanoseconds, one must use conversion factors specified by
+ ** mach_timebase_info().
+ */
+ static mach_timebase_info_data_t timebase;
+ struct curltime cnow;
+ uint64_t usecs;
+
+ if(0 == timebase.denom)
+ (void) mach_timebase_info(&timebase);
+
+ usecs = mach_absolute_time();
+ usecs *= timebase.numer;
+ usecs /= timebase.denom;
+ usecs /= 1000;
+
+ cnow.tv_sec = usecs / 1000000;
+ cnow.tv_usec = (int)(usecs % 1000000);
+
+ return cnow;
+}
+
+#elif defined(HAVE_GETTIMEOFDAY)
+
+struct curltime curlx_now(void)
+{
+ /*
+ ** gettimeofday() is not granted to be increased monotonically, due to
+ ** clock drifting and external source time synchronization it can jump
+ ** forward or backward in time.
+ */
+ struct timeval now;
+ struct curltime ret;
+ (void)gettimeofday(&now, NULL);
+ ret.tv_sec = now.tv_sec;
+ ret.tv_usec = (int)now.tv_usec;
+ return ret;
+}
+
+#else
+
+struct curltime curlx_now(void)
+{
+ /*
+ ** time() returns the value of time in seconds since the Epoch.
+ */
+ struct curltime now;
+ now.tv_sec = time(NULL);
+ now.tv_usec = 0;
+ return now;
+}
+
+#endif
+
+/*
+ * Returns: time difference in number of milliseconds. For too large diffs it
+ * returns max value.
+ *
+ * @unittest: 1323
+ */
+timediff_t curlx_timediff(struct curltime newer, struct curltime older)
+{
+ timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
+ if(diff >= (TIMEDIFF_T_MAX/1000))
+ return TIMEDIFF_T_MAX;
+ else if(diff <= (TIMEDIFF_T_MIN/1000))
+ return TIMEDIFF_T_MIN;
+ return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000;
+}
+
+/*
+ * Returns: time difference in number of milliseconds, rounded up.
+ * For too large diffs it returns max value.
+ */
+timediff_t curlx_timediff_ceil(struct curltime newer, struct curltime older)
+{
+ timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
+ if(diff >= (TIMEDIFF_T_MAX/1000))
+ return TIMEDIFF_T_MAX;
+ else if(diff <= (TIMEDIFF_T_MIN/1000))
+ return TIMEDIFF_T_MIN;
+ return diff * 1000 + (newer.tv_usec - older.tv_usec + 999)/1000;
+}
+
+/*
+ * Returns: time difference in number of microseconds. For too large diffs it
+ * returns max value.
+ */
+timediff_t curlx_timediff_us(struct curltime newer, struct curltime older)
+{
+ timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
+ if(diff >= (TIMEDIFF_T_MAX/1000000))
+ return TIMEDIFF_T_MAX;
+ else if(diff <= (TIMEDIFF_T_MIN/1000000))
+ return TIMEDIFF_T_MIN;
+ return diff * 1000000 + newer.tv_usec-older.tv_usec;
+}
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