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): def complete()
def complete_in_idle()
def get_op_res_gboolean()
def get_op_res_gssize()
def propagate_error()
def set_handle_cancellation(handle_cancellation)
def set_op_res_gboolean(op_res)
def set_op_res_gssize(op_res)

Ancestry

+-- gobject.GObject
  +-- gio.SimpleAsyncResult

Implemented Interface

gio.SimpleAsyncResult implements gio.AsyncResult.

Description

Implements gio.AsyncResult for simple cases. Most of the time, this will be all an application needs, and will be used transparently Because of this, GSimpleAsyncResult is used throughout GIO for handling asynchronous functions.

gio.SimpleAsyncResult handles GAsyncReadyCallbacks, error reporting, operation cancellation and the final state of an operation, completely transparent to the application. Results can be returned as a pointer e.g. for functions that return data that is collected asynchronously, a boolean value for checking the success or failure of an operation, or a gssize for operations which return the number of bytes modified by the operation; all of the simple return cases are covered.

Most of the time, an application will not need to know of the details of this API; it is handled transparently, and any necessary operations are handled by GAsyncResult's interface. However, if implementing a new GIO module, for writing language bindings, or for complex applications that need better control of how asynchronous operations are completed, it is important to understand this functionality.

gio.SimpleAsyncResult are tagged with the calling function to ensure that asynchronous functions and their finishing functions are used together correctly.

An asynchronous operation can be made to ignore a cancellation event by calling gio.SimpleAsyncResult.set_handle_cancellation() with a gio.AsyncResult for the operation and False. This is useful for operations that are dangerous to cancel, such as close (which would cause a leak if cancelled before being run).

gio.AsyncResult can integrate into GLib's event loop, GMainLoop, or it can use GThreads if available. gio.SimpleAsyncResult.complete() will finish an I/O task directly within the main event loop. gio.SimpleAsyncResult.complete_in_idle() will integrate the I/O task into the main event loop as an idle function.

To set the results of an asynchronous function, gio.SimpleAsyncResult.set_op_res_gboolean(), and gio.SimpleAsyncResult.set_op_res_gssize() are provided, setting the operation's result to a gboolean, or gssize, respectively.

Likewise, to get the result of an asynchronous function, gio.SimpleAsyncResult.get_op_res_gboolean() and gio.SimpleAsyncResult.get_op_res_gssize() are provided, getting the operation's result as a gboolean and gssize, respectively.

Methods

gio.SimpleAsyncResult.complete

    def complete()

The complete() method completes an asynchronous I/O job. Must be called in the main thread, as it invokes the callback that should be called in the main thread. If you are in a different thread use gio.SimpleAsyncResult.complete_in_idle().

gio.SimpleAsyncResult.complete_in_idle

    def complete_in_idle()

The complete_in_idle() method completes an asynchronous function in the main event loop using an idle function.

gio.SimpleAsyncResult.get_op_res_gboolean

    def get_op_res_gboolean()

Returns :

True if the operation's result was True, False if the operation's result was False.

The get_op_res_gboolean() method gets the operation result boolean from within the asynchronous result.

gio.SimpleAsyncResult.get_op_res_gssize

    def get_op_res_gssize()

Returns :

a gssize returned from the asynchronous function.

The get_op_res_gssize() method gets a gssize from the asynchronous result.

gio.SimpleAsyncResult.propagate_error

    def propagate_error()

Returns :

True if the error was propegated to dest. False otherwise.

The propagate_error() method propagates an error from within the simple asynchronous result to a given destination.

gio.SimpleAsyncResult.set_handle_cancellation

    def set_handle_cancellation(handle_cancellation)

handle_cancellation :

a boolean.

The set_handle_cancellation() method sets whether to handle cancellation within the asynchronous operation.

gio.SimpleAsyncResult.set_op_res_gboolean

    def set_op_res_gboolean(op_res)

op_res :

a boolean.

The set_op_res_gboolean() method sets the operation result to a boolean within the asynchronous result.

gio.SimpleAsyncResult.set_op_res_gssize

    def set_op_res_gssize(op_res)

op_res :

a gssize.

The set_op_res_gssize() method sets the operation result within the asynchronous result to the given op_res.

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