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LowMemoryTask Class Reference

The LowMemoryTask class reponds to low memory situations by closing applications. More...

    #include <LowMemoryTask>

Inherits QObject.

List of all members, including inherited members

Public Functions

virtual ~LowMemoryTask ()

37 public functions inherited from QObject

Additional Inherited Members

1 property inherited from QObject
1 public slot inherited from QObject
1 signal inherited from QObject
1 public type inherited from QObject
4 static public members inherited from QObject
8 protected functions inherited from QObject
2 protected variables inherited from QObject
1 static protected member inherited from QObject

Detailed Description

The LowMemoryTask class reponds to low memory situations by closing applications.

The LowMemoryTask provides a Qtopia Server Task. Qtopia Server Tasks are documented in full in the QtopiaServerApplication class documentation.

Task Name	LowMemoryTask
Interfaces	None
Services	None

The LowMemoryTask monitors memory pressure through the default MemoryMonitor providing task. The following table describes the action taken by this task at each memory level.

Memory State	Action
MemoryMonitor::MemUnknown	No action.
MemoryMonitor::MemNormal	No action.
MemoryMonitor::MemLow	A `quitIfInvisible()` message is sent to the first running, non-preloaded application. If this application is in the lazy-application-shutdown state it will consequently terminate.
	A `RecoverMemory()` message is sent to the `QPE/System` channel. Applications may use this as a trigger to recover memory or to free caches.
MemoryMonitor::MemVeryLow	A `quitIfInvisible()` message is sent to all running, non-preloaded applications. If these applications are in the lazy-application-shutdown state they will consequently terminate.
	A `RecoverMemory()` message is sent to the `QPE/System` channel. Applications may use this as a trigger to recover memory or to free caches.
MemoryMonitor::MemCritical	A `quitIfInvisible()` message is sent to all running, non-preloaded applications. If these applications are in the lazy-application-shutdown state they will consequently terminate.
	A `RecoverMemory()` message is sent to the `QPE/System` channel. Applications may use this as a trigger to recover memory or to free caches.
	The most recently launched application is forcibly killed. The most recently launched application refers to that most recently executed by the system, not the most recently raised.

Member Function Documentation

LowMemoryTask::~LowMemoryTask () `[virtual]`

Destroys the LowMemoryTask instance.

Trademarks