Tizen Native API 3.0
Ecore poller provides infrastructure for the creation of pollers. Pollers are, in essence, callbacks that share a single timer per type. Because not all pollers need to be called at the same frequency the user may specify the frequency in ticks(each expiration of the shared timer is called a tick, in ecore poller parlance) for each added poller. Ecore pollers should only be used when the poller doesn't have specific requirements on the exact times to poll.
This architecture means that the main loop is only woken up once to handle all pollers of that type, this will save power as the CPU has more of a chance to go into a low power state the longer it is asleep for, so this should be used in situations where power usage is a concern.
For now only 1 core poller type is supported: ECORE_POLLER_CORE, the default interval for ECORE_POLLER_CORE is 0.125(or 1/8th) second.
The creation of a poller is extremely simple and only requires one line:
This sample creates a poller to call
my_poller_function at every tick with
NULL as data.
|void||ecore_poller_poll_interval_set (Ecore_Poller_Type type, double poll_time)|
|Sets the time(in seconds) between ticks for the given poller type. |
|double||ecore_poller_poll_interval_get (Ecore_Poller_Type type)|
|Gets the time(in seconds) between ticks for the given poller type. |
|Ecore_Poller *||ecore_poller_add (Ecore_Poller_Type type, int interval, Ecore_Task_Cb func, const void *data)|
|Creates a poller to call the given function at a particular tick interval. |
|void *||ecore_poller_del (Ecore_Poller *poller)|
|Deletes the specified poller from the timer list. |
|typedef Eo Ecore_Poller|
A handle for pollers
Enumeration Type Documentation
|const void *||data|
Creates a poller to call the given function at a particular tick interval.
type The ticker type to attach the poller to. Must be ECORE_POLLER_CORE. interval The poll interval. func The poller function. data Data to pass to func when it is called.
- A poller object on success,
This function adds func as a poller callback that will be called every interval ticks together with other pollers of type type. func will be passed the
data pointer as a parameter.
interval must be between 1 and 32768 inclusive, and must be a power of 2 (i.e. 1, 2, 4, 8, 16, ... 16384, 32768). The exact tick in which func will be called is undefined, as only the interval between calls can be defined. Ecore will endeavor to keep pollers synchronized and to call as many in 1 wakeup event as possible. If interval is not a power of two, the closest power of 2 greater than interval will be used.
When the poller
func is called, it must return a value of either
0). If it returns
1, it will be called again at the next tick, or if it returns
0 it will be deleted automatically making any references/handles for it invalid.
- Since :
Deletes the specified poller from the timer list.
poller The poller to delete.
- The data pointer set for the timer when ecore_poller_add was called on success,
- poller must be a valid handle. If the poller function has already returned
0, the handle is no longer valid (and does not need to be deleted).
- Since :
Gets the time(in seconds) between ticks for the given poller type.
type The poller type to query.
- The time in seconds between ticks of the poller timer.
This will get the time between ticks of the specified poller timer.
- Since :
Sets the time(in seconds) between ticks for the given poller type.
type The poller type to adjust. poll_time The time(in seconds) between ticks of the timer.
This will adjust the time between ticks of the given timer type defined by
type to the time period defined by
- Since :