#include "Ecore.h"
#include "ecore_private.h"
+#include <time.h>
-
-/* FIXME: clock_gettime() is an option... */
+#if HAVE_CLOCK_GETTIME
+static clockid_t _ecore_time_clock_id = -1;
+#endif
+double _ecore_loop_time = -1.0;
/**
* Retrieves the current system time as a floating point value in seconds.
*
- * Also see ecore_loop_time_get().
+ * This uses a monotonic clock and thus never goes back in time while
+ * machine is live (even if user changes time or timezone changes,
+ * however it may be reset whenever the machine is restarted).
*
- * @return The number of seconds since 12.00AM 1st January 1970.
+ * @see ecore_loop_time_get().
+ * @see ecore_time_unix_get().
+ *
+ * @return The number of seconds. Start time is not defined (it may be
+ * when the machine was booted, unix time, etc), all it is
+ * defined is that it never goes backwards (unless you got big critical
+ * messages when the application started).
* @ingroup Ecore_Time_Group
*/
EAPI double
ecore_time_get(void)
{
+#if !HAVE_CLOCK_GETTIME
+ return ecore_time_unix_get();
+#else
+ struct timespec t;
+
+ if (EINA_UNLIKELY(_ecore_time_clock_id < 0))
+ return ecore_time_unix_get();
+
+ if (EINA_UNLIKELY(clock_gettime(_ecore_time_clock_id, &t)))
+ {
+ CRIT("Cannot get current time.");
+ /* Try to at least return the latest value retrieved*/
+ return _ecore_loop_time;
+ }
+
+ return (double)t.tv_sec + (((double)t.tv_nsec) / 1000000000.0);
+#endif
+}
+
+/**
+ * Retrieves the current UNIX time as a floating point value in seconds.
+ *
+ * @see ecore_time_get().
+ * @see ecore_loop_time_get().
+ *
+ * @return The number of seconds since 12.00AM 1st January 1970.
+ * @ingroup Ecore_Time_Group
+ */
+EAPI double
+ecore_time_unix_get(void)
+{
#ifdef HAVE_EVIL
return evil_time_get();
#else
#endif
}
-double _ecore_loop_time = -1.0;
-
/**
- * Retrieves the time at which the last loop stopped waiting for timeouts or events
+ * Retrieves the time at which the last loop stopped waiting for timeouts or
+ * events.
*
- * This gets the time (since Jan 1st, 1970, 12:00AM) that the main loop ceased
- * waiting for timouts and/or events to come in or for signals or any other
- * interrupt source. This should be considered a reference point for all
- * time based activity that should calculate its timepoint from the return
- * of ecore_loop_time_get(). use this UNLESS you absolutely must get the
- * current actual timepoint - then use ecore_time_get(). If this is called
- * before any loop has ever been run, then it will call ecore_time_get() for
- * you the first time and thus have an initial time reference.
+ * This gets the time that the main loop ceased waiting for timouts and/or
+ * events to come in or for signals or any other interrupt source. This should
+ * be considered a reference point for all time based activity that should
+ * calculate its timepoint from the return of ecore_loop_time_get(). Use this
+ * UNLESS you absolutely must get the current actual timepoint - then use
+ * ecore_time_get(). Note that this time is meant to be used as relative to
+ * other times obtained on this run. If you need absolute time references, use
+ * ecore_time_unix_get() instead.
*
- * @return The number of seconds since 12.00AM 1st January 1970.
+ * This function can be called before any loop has ever been run, but either
+ * ecore_init() or ecore_time_get() must have been called once.
+ *
+ * @return The number of seconds. Start time is not defined (it may be
+ * when the machine was booted, unix time, etc), all it is
+ * defined is that it never goes backwards (unless you got big critical
+ * messages when the application started).
* @ingroup Ecore_Time_Group
*/
EAPI double
{
return _ecore_loop_time;
}
+
+
+/********************** Internal methods ********************************/
+
+/* TODO: Documentation says "All implementations support the system-wide
+ * real-time clock, which is identified by CLOCK_REALTIME. Check if the fallback
+ * to unix time (without specifying the resolution) might be removed
+ */
+void
+_ecore_time_init(void)
+{
+#if HAVE_CLOCK_GETTIME
+ struct timespec t;
+
+ if (_ecore_time_clock_id != -1) return;
+
+ if (!clock_gettime(CLOCK_MONOTONIC, &t))
+ {
+ _ecore_time_clock_id = CLOCK_MONOTONIC;
+ DBG("using CLOCK_MONOTONIC.");
+ }
+ else if (!clock_gettime(CLOCK_REALTIME, &t))
+ {
+ /* may go backwards */
+ _ecore_time_clock_id = CLOCK_REALTIME;
+ WRN("CLOCK_MONOTONIC not available. Fallback to CLOCK_REALTIME.");
+ }
+ else
+ {
+ _ecore_time_clock_id = -2;
+ CRIT("Cannot get a valid clock_gettime() clock id! "
+ "Fallback to unix time.");
+ }
+#else
+# warning "Your platform isn't supported yet"
+ _ecore_time_clock_it = -2;
+ CRIT("Platform does not support clock_gettime. "
+ "Fallback to unix time.");
+#endif
+
+ _ecore_loop_time = ecore_time_get();
+}
projects / framework / uifw / ecore.git / commitdiff