QRunnable

The QRunnable class is the base class for all runnable objects. More

Inheritance diagram of PySide2.QtCore.QRunnable

Synopsis

Functions

Virtual functions

Detailed Description

The QRunnable class is an interface for representing a task or piece of code that needs to be executed, represented by your reimplementation of the run() function.

You can use QThreadPool to execute your code in a separate thread. QThreadPool deletes the QRunnable automatically if autoDelete() returns true (the default). Use setAutoDelete() to change the auto-deletion flag.

QThreadPool supports executing the same QRunnable more than once by calling tryStart (this) from within the run() function. If autoDelete is enabled the QRunnable will be deleted when the last thread exits the run function. Calling start() multiple times with the same QRunnable when autoDelete is enabled creates a race condition and is not recommended.

See also

QThreadPool

class PySide2.QtCore.QRunnable

Constructs a QRunnable . Auto-deletion is enabled by default.

PySide2.QtCore.QRunnable.autoDelete()
Return type

bool

Returns true is auto-deletion is enabled; false otherwise.

If auto-deletion is enabled, QThreadPool will automatically delete this runnable after calling run() ; otherwise, ownership remains with the application programmer.

PySide2.QtCore.QRunnable.run()

Implement this pure virtual function in your subclass.

PySide2.QtCore.QRunnable.setAutoDelete(_autoDelete)
Parameters

_autoDelete – bool

Enables auto-deletion if autoDelete is true; otherwise auto-deletion is disabled.

If auto-deletion is enabled, QThreadPool will automatically delete this runnable after calling run() ; otherwise, ownership remains with the application programmer.

Note that this flag must be set before calling start() . Calling this function after start() results in undefined behavior.