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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GPermission: GIO Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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<link rel="home" href="index.html" title="GIO Reference Manual">
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<link rel="up" href="permissions.html" title="Permissions">
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<link rel="prev" href="permissions.html" title="Permissions">
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<link rel="next" href="GSimplePermission.html" title="GSimplePermission">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top |
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Description |
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Object Hierarchy |
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Properties
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GPermission
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GPermission — An object representing the permission
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to perform a certain action
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Functions
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gboolean
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g_permission_get_allowed ()
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gboolean
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g_permission_get_can_acquire ()
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gboolean
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g_permission_get_can_release ()
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gboolean
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g_permission_acquire ()
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void
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g_permission_acquire_async ()
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gboolean
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g_permission_acquire_finish ()
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gboolean
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g_permission_release ()
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void
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g_permission_release_async ()
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gboolean
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g_permission_release_finish ()
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void
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g_permission_impl_update ()
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Properties
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gboolean
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allowed
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Read
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gboolean
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can-acquire
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Read
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gboolean
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can-release
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Read
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Types and Values
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GPermission
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Object Hierarchy
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GObject
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╰── GPermission
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╰── GSimplePermission
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Includes
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#include <gio/gio.h>
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Description
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A GPermission represents the status of the caller's permission to
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perform a certain action.
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You can query if the action is currently allowed and if it is
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possible to acquire the permission so that the action will be allowed
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in the future.
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There is also an API to actually acquire the permission and one to
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release it.
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As an example, a GPermission might represent the ability for the
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user to write to a GSettings object. This GPermission object could
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then be used to decide if it is appropriate to show a "Click here to
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unlock" button in a dialog and to provide the mechanism to invoke
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when that button is clicked.
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Functions
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g_permission_get_allowed ()
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gboolean
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g_permission_get_allowed (GPermission *permission);
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Gets the value of the 'allowed' property. This property is TRUE if
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the caller currently has permission to perform the action that
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permission
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represents the permission to perform.
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Parameters
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permission
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a GPermission instance
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Returns
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the value of the 'allowed' property
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Since: 2.26
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g_permission_get_can_acquire ()
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gboolean
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g_permission_get_can_acquire (GPermission *permission);
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Gets the value of the 'can-acquire' property. This property is TRUE
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if it is generally possible to acquire the permission by calling
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g_permission_acquire().
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Parameters
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permission
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a GPermission instance
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Returns
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the value of the 'can-acquire' property
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Since: 2.26
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g_permission_get_can_release ()
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gboolean
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g_permission_get_can_release (GPermission *permission);
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Gets the value of the 'can-release' property. This property is TRUE
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if it is generally possible to release the permission by calling
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g_permission_release().
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Parameters
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permission
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a GPermission instance
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Returns
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the value of the 'can-release' property
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Since: 2.26
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g_permission_acquire ()
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gboolean
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g_permission_acquire (GPermission *permission,
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GCancellable *cancellable,
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GError **error);
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Attempts to acquire the permission represented by permission
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.
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The precise method by which this happens depends on the permission
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and the underlying authentication mechanism. A simple example is
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that a dialog may appear asking the user to enter their password.
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You should check with g_permission_get_can_acquire() before calling
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this function.
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If the permission is acquired then TRUE is returned. Otherwise,
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FALSE is returned and error
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is set appropriately.
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This call is blocking, likely for a very long time (in the case that
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user interaction is required). See g_permission_acquire_async() for
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the non-blocking version.
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Parameters
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permission
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a GPermission instance
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cancellable
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a GCancellable, or NULL.
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[nullable]
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error
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a pointer to a NULL GError, or NULL
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Returns
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TRUE if the permission was successfully acquired
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Since: 2.26
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g_permission_acquire_async ()
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void
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g_permission_acquire_async (GPermission *permission,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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Attempts to acquire the permission represented by permission
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.
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This is the first half of the asynchronous version of
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g_permission_acquire().
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Parameters
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permission
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a GPermission instance
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cancellable
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a GCancellable, or NULL.
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[nullable]
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callback
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the GAsyncReadyCallback to call when done
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user_data
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the user data to pass to callback
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Since: 2.26
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g_permission_acquire_finish ()
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gboolean
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g_permission_acquire_finish (GPermission *permission,
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GAsyncResult *result,
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GError **error);
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Collects the result of attempting to acquire the permission
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represented by permission
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.
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This is the second half of the asynchronous version of
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g_permission_acquire().
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Parameters
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permission
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a GPermission instance
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result
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the GAsyncResult given to the GAsyncReadyCallback
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error
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a pointer to a NULL GError, or NULL
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Returns
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TRUE if the permission was successfully acquired
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Since: 2.26
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g_permission_release ()
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gboolean
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g_permission_release (GPermission *permission,
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GCancellable *cancellable,
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GError **error);
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Attempts to release the permission represented by permission
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.
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The precise method by which this happens depends on the permission
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and the underlying authentication mechanism. In most cases the
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permission will be dropped immediately without further action.
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You should check with g_permission_get_can_release() before calling
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this function.
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If the permission is released then TRUE is returned. Otherwise,
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FALSE is returned and error
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is set appropriately.
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This call is blocking, likely for a very long time (in the case that
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user interaction is required). See g_permission_release_async() for
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the non-blocking version.
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Parameters
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permission
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a GPermission instance
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cancellable
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a GCancellable, or NULL.
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[nullable]
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error
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a pointer to a NULL GError, or NULL
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Returns
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TRUE if the permission was successfully released
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Since: 2.26
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g_permission_release_async ()
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void
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g_permission_release_async (GPermission *permission,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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Attempts to release the permission represented by permission
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.
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This is the first half of the asynchronous version of
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g_permission_release().
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Parameters
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permission
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a GPermission instance
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cancellable
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a GCancellable, or NULL.
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[nullable]
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callback
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the GAsyncReadyCallback to call when done
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user_data
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the user data to pass to callback
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Since: 2.26
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g_permission_release_finish ()
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gboolean
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g_permission_release_finish (GPermission *permission,
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GAsyncResult *result,
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GError **error);
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Collects the result of attempting to release the permission
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represented by permission
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.
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This is the second half of the asynchronous version of
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g_permission_release().
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Parameters
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permission
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a GPermission instance
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result
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the GAsyncResult given to the GAsyncReadyCallback
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error
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a pointer to a NULL GError, or NULL
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Returns
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TRUE if the permission was successfully released
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Since: 2.26
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g_permission_impl_update ()
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void
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g_permission_impl_update (GPermission *permission,
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gboolean allowed,
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gboolean can_acquire,
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gboolean can_release);
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This function is called by the GPermission implementation to update
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the properties of the permission. You should never call this
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function except from a GPermission implementation.
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GObject notify signals are generated, as appropriate.
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Parameters
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permission
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a GPermission instance
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allowed
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the new value for the 'allowed' property
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can_acquire
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the new value for the 'can-acquire' property
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can_release
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the new value for the 'can-release' property
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Since: 2.26
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Types and Values
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GPermission
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typedef struct _GPermission GPermission;
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GPermission is an opaque data structure and can only be accessed
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using the following functions.
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Property Details
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The “allowed” property
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“allowed” gboolean
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TRUE if the caller currently has permission to perform the action that
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permission
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represents the permission to perform.
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Flags: Read
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Default value: FALSE
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The “can-acquire” property
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“can-acquire” gboolean
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TRUE if it is generally possible to acquire the permission by calling
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g_permission_acquire().
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Flags: Read
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Default value: FALSE
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The “can-release” property
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“can-release” gboolean
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TRUE if it is generally possible to release the permission by calling
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g_permission_release().
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Flags: Read
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Default value: FALSE
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Generated by GTK-Doc V1.27
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</body>
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</html>
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