## GstSystemClock GstSystemClock — Default clock that uses the current system time |

## Synopsis

    #include <gst/gst.h>

    enum                GstClockType;
    struct              GstSystemClock;
    GstClock *          gst_system_clock_obtain             (void);

## Object Hierarchy

      GObject
       +----GstObject
             +----GstClock
                   +----GstSystemClock

## Properties

      "clock-type"               GstClockType          : Read / Write

## Description

The GStreamer core provides a GstSystemClock based on the system time. Asynchronous callbacks are scheduled from an internal thread.

Clock implementors are encouraged to subclass this systemclock as it implements the async notification.

Subclasses can however override all of the important methods for sync and async notifications to implement their own callback methods or blocking wait operations.

Last reviewed on 2006-03-08 (0.10.4)

## Details

### enum GstClockType

    typedef enum {
      GST_CLOCK_TYPE_REALTIME       = 0,
      GST_CLOCK_TYPE_MONOTONIC      = 1
    } GstClockType;

The different kind of clocks.

`GST_CLOCK_TYPE_REALTIME` | time since Epoch
`GST_CLOCK_TYPE_MONOTONIC` | monotonic time since some unspecified starting point

### struct GstSystemClock

    struct GstSystemClock;

The default implementation of a GstClock that uses the system time.

### gst_system_clock_obtain ()

    GstClock *          gst_system_clock_obtain             (void);

Get a handle to the default system clock. The refcount of the clock will be increased so you need to unref the clock after usage.

Returns : | the default clock. MT safe. [transfer full]

## Property Details

### The `"clock-type"` property

      "clock-type"               GstClockType          : Read / Write

The type of underlying clock implementation used.

Default value: GST_CLOCK_TYPE_MONOTONIC

## See Also

GstClock