GIO Reference Manual | ||||
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#include <gio/gio.h> GFileEnumerator; GFileInfo * g_file_enumerator_next_file (GFileEnumerator *enumerator, GCancellable *cancellable, GError **error); gboolean g_file_enumerator_close (GFileEnumerator *enumerator, GCancellable *cancellable, GError **error); void g_file_enumerator_next_files_async (GFileEnumerator *enumerator, int num_files, int io_priority, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data); GList * g_file_enumerator_next_files_finish (GFileEnumerator *enumerator, GAsyncResult *result, GError **error); void g_file_enumerator_close_async (GFileEnumerator *enumerator, int io_priority, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data); gboolean g_file_enumerator_close_finish (GFileEnumerator *enumerator, GAsyncResult *result, GError **error); gboolean g_file_enumerator_is_closed (GFileEnumerator *enumerator); gboolean g_file_enumerator_has_pending (GFileEnumerator *enumerator); void g_file_enumerator_set_pending (GFileEnumerator *enumerator, gboolean pending); GFile * g_file_enumerator_get_container (GFileEnumerator *enumerator);
GFileEnumerator allows you to operate on a set of GFiles,
returning a GFileInfo structure for each file enumerated (e.g.
g_file_enumerate_children()
will return a GFileEnumerator for each
of the children within a directory).
To get the next file's information from a GFileEnumerator, use
g_file_enumerator_next_file()
or its asynchronous version,
g_file_enumerator_next_file_async()
. Note that the asynchronous
version will return a list of GFileInfos, whereas the
synchronous will only return the next file in the enumerator.
To close a GFileEnumerator, use g_file_enumerator_close()
, or
its asynchronous version, g_file_enumerator_close_async()
. Once
a GFileEnumerator is closed, no further actions may be performed
on it, and it should be freed with g_object_unref()
.
GFileInfo * g_file_enumerator_next_file (GFileEnumerator *enumerator, GCancellable *cancellable, GError **error);
Returns information for the next file in the enumerated object. Will block until the information is available. The GFileInfo returned from this function will contain attributes that match the attribute string that was passed when the GFileEnumerator was created.
On error, returns NULL
and sets error
to the error. If the
enumerator is at the end, NULL
will be returned and error
will
be unset.
|
a GFileEnumerator. |
|
optional GCancellable object, NULL to ignore.
|
|
location to store the error occuring, or NULL to ignore
|
Returns : |
A GFileInfo or NULL on error or end of enumerator.
Free the returned object with g_object_unref() when no longer needed.
|
gboolean g_file_enumerator_close (GFileEnumerator *enumerator, GCancellable *cancellable, GError **error);
Releases all resources used by this enumerator, making the
enumerator return G_IO_ERROR_CLOSED
on all calls.
This will be automatically called when the last reference is dropped, but you might want to call this function to make sure resources are released as early as possible.
|
a GFileEnumerator. |
|
optional GCancellable object, NULL to ignore.
|
|
location to store the error occuring, or NULL to ignore
|
Returns : |
TRUE on success or FALSE on error. |
void g_file_enumerator_next_files_async (GFileEnumerator *enumerator, int num_files, int io_priority, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data);
Request information for a number of files from the enumerator asynchronously.
When all i/o for the operation is finished the callback
will be called with
the requested information.
The callback can be called with less than num_files
files in case of error
or at the end of the enumerator. In case of a partial error the callback will
be called with any succeeding items and no error, and on the next request the
error will be reported. If a request is cancelled the callback will be called
with G_IO_ERROR_CANCELLED
.
During an async request no other sync and async calls are allowed, and will
result in G_IO_ERROR_PENDING
errors.
Any outstanding i/o request with higher priority (lower numerical value) will
be executed before an outstanding request with lower priority. Default
priority is G_PRIORITY_DEFAULT
.
|
a GFileEnumerator. |
|
the number of file info objects to request |
|
the io priority of the request. |
|
optional GCancellable object, NULL to ignore.
|
|
a GAsyncReadyCallback to call when the request is satisfied |
|
the data to pass to callback function |
GList * g_file_enumerator_next_files_finish (GFileEnumerator *enumerator, GAsyncResult *result, GError **error);
Finishes the asynchronous operation started with g_file_enumerator_next_files_async()
.
|
a GFileEnumerator. |
|
a GAsyncResult. |
|
a GError location to store the error occuring, or NULL to
ignore.
|
Returns : |
a GList of GFileInfos. You must free the list with
g_list_free() and unref the infos with g_object_unref when you're
done with them.
|
void g_file_enumerator_close_async (GFileEnumerator *enumerator, int io_priority, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data);
Asynchronously closes the file enumerator.
If cancellable
is not NULL
, then the operation can be cancelled by
triggering the cancellable object from another thread. If the operation
was cancelled, the error G_IO_ERROR_CANCELLED
will be returned in
g_file_enumerator_close_finish()
.
|
a GFileEnumerator. |
|
the I/O priority of the request. |
|
optional GCancellable object, NULL to ignore.
|
|
a GAsyncReadyCallback to call when the request is satisfied |
|
the data to pass to callback function |
gboolean g_file_enumerator_close_finish (GFileEnumerator *enumerator, GAsyncResult *result, GError **error);
Finishes closing a file enumerator, started from g_file_enumerator_close_async()
.
If the file enumerator was already closed when g_file_enumerator_close_async()
was called, then this function will report G_IO_ERROR_CLOSED
in error
, and
return FALSE
. If the file enumerator had pending operation when the close
operation was started, then this function will report G_IO_ERROR_PENDING
, and
return FALSE
. If cancellable
was not NULL
, then the operation may have been
cancelled by triggering the cancellable object from another thread. If the operation
was cancelled, the error G_IO_ERROR_CANCELLED
will be set, and FALSE
will be
returned.
|
a GFileEnumerator. |
|
a GAsyncResult. |
|
a GError location to store the error occuring, or NULL to
ignore.
|
Returns : |
TRUE if the close operation has finished successfully.
|
gboolean g_file_enumerator_is_closed (GFileEnumerator *enumerator);
Checks if the file enumerator has been closed.
|
a GFileEnumerator. |
Returns : |
TRUE if the enumerator is closed.
|
gboolean g_file_enumerator_has_pending (GFileEnumerator *enumerator);
Checks if the file enumerator has pending operations.
|
a GFileEnumerator. |
Returns : |
TRUE if the enumerator has pending operations.
|
void g_file_enumerator_set_pending (GFileEnumerator *enumerator, gboolean pending);
Sets the file enumerator as having pending operations.
|
a GFileEnumerator. |
|
a boolean value. |
GFile * g_file_enumerator_get_container (GFileEnumerator *enumerator);
Get the GFile container which is being enumerated.
|
a GFileEnumerator |
Returns : |
the GFile which is being enumerated. |
Since 2.18.
"container"
property"container" GFile* : Write / Construct Only
The container that is being enumerated.