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D-Bus 1.14.10
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Object representing a file descriptor to be watched. More...
Typedefs | |
| typedef struct DBusWatch | DBusWatch |
| Opaque object representing a file descriptor to be watched for changes in readability, writability, or hangup. More... | |
Functions | |
| DBUS_EXPORT DBUS_DEPRECATED int | dbus_watch_get_fd (DBusWatch *watch) |
| Deprecated former name of dbus_watch_get_unix_fd(). More... | |
| DBUS_EXPORT int | dbus_watch_get_unix_fd (DBusWatch *watch) |
| Returns a UNIX file descriptor to be watched, which may be a pipe, socket, or other type of descriptor. More... | |
| DBUS_EXPORT int | dbus_watch_get_socket (DBusWatch *watch) |
| Returns a socket to be watched, on UNIX this will return -1 if our transport is not socket-based so dbus_watch_get_unix_fd() is preferred. More... | |
| DBUS_EXPORT unsigned int | dbus_watch_get_flags (DBusWatch *watch) |
| Gets flags from DBusWatchFlags indicating what conditions should be monitored on the file descriptor. More... | |
| DBUS_EXPORT void * | dbus_watch_get_data (DBusWatch *watch) |
| Gets data previously set with dbus_watch_set_data() or NULL if none. More... | |
| DBUS_EXPORT void | dbus_watch_set_data (DBusWatch *watch, void *data, DBusFreeFunction free_data_function) |
| Sets data which can be retrieved with dbus_watch_get_data(). More... | |
| DBUS_EXPORT dbus_bool_t | dbus_watch_handle (DBusWatch *watch, unsigned int flags) |
| Called to notify the D-Bus library when a previously-added watch is ready for reading or writing, or has an exception such as a hangup. More... | |
| DBUS_EXPORT dbus_bool_t | dbus_watch_get_enabled (DBusWatch *watch) |
| Returns whether a watch is enabled or not. More... | |
| DBusSocket | _dbus_watch_get_socket (DBusWatch *watch) |
| DBusPollable | _dbus_watch_get_pollable (DBusWatch *watch) |
Object representing a file descriptor to be watched.
Types and functions related to DBusWatch. A watch represents a file descriptor that the main loop needs to monitor, as in Qt's QSocketNotifier or GLib's g_io_add_watch().
Use dbus_connection_set_watch_functions() or dbus_server_set_watch_functions() to be notified when libdbus needs to add or remove watches.
Opaque object representing a file descriptor to be watched for changes in readability, writability, or hangup.
Definition at line 44 of file dbus-connection.h.
| DBusPollable _dbus_watch_get_pollable | ( | DBusWatch * | watch | ) |
Definition at line 621 of file dbus-watch.c.
| DBusSocket _dbus_watch_get_socket | ( | DBusWatch * | watch | ) |
Definition at line 605 of file dbus-watch.c.
| void * dbus_watch_get_data | ( | DBusWatch * | watch | ) |
Gets data previously set with dbus_watch_set_data() or NULL if none.
| watch | the DBusWatch object. |
Definition at line 658 of file dbus-watch.c.
| dbus_bool_t dbus_watch_get_enabled | ( | DBusWatch * | watch | ) |
| int dbus_watch_get_fd | ( | DBusWatch * | watch | ) |
Deprecated former name of dbus_watch_get_unix_fd().
| watch | the DBusWatch object. |
Definition at line 543 of file dbus-watch.c.
References dbus_watch_get_unix_fd(), and NULL.
| unsigned int dbus_watch_get_flags | ( | DBusWatch * | watch | ) |
Gets flags from DBusWatchFlags indicating what conditions should be monitored on the file descriptor.
The flags returned will only contain DBUS_WATCH_READABLE and DBUS_WATCH_WRITABLE, never DBUS_WATCH_HANGUP or DBUS_WATCH_ERROR; all watches implicitly include a watch for hangups, errors, and other exceptional conditions.
| watch | the DBusWatch object. |
Definition at line 642 of file dbus-watch.c.
References _dbus_assert, flags, and NULL.
| int dbus_watch_get_socket | ( | DBusWatch * | watch | ) |
Returns a socket to be watched, on UNIX this will return -1 if our transport is not socket-based so dbus_watch_get_unix_fd() is preferred.
On Windows, dbus_watch_get_unix_fd() returns -1 but this function returns a Winsock socket (assuming the transport is socket-based, as it always is for now).
| watch | the DBusWatch object. |
Definition at line 593 of file dbus-watch.c.
Referenced by _dbus_transport_handle_watch(), and dbus_watch_get_unix_fd().
| int dbus_watch_get_unix_fd | ( | DBusWatch * | watch | ) |
Returns a UNIX file descriptor to be watched, which may be a pipe, socket, or other type of descriptor.
On UNIX this is preferred to dbus_watch_get_socket() since it works with more kinds of DBusWatch.
Always returns -1 on Windows. On Windows you use dbus_watch_get_socket() to get a Winsock socket to watch.
| watch | the DBusWatch object. |
Definition at line 564 of file dbus-watch.c.
References dbus_watch_get_socket(), fd, and NULL.
Referenced by dbus_watch_get_fd().
| dbus_bool_t dbus_watch_handle | ( | DBusWatch * | watch, |
| unsigned int | flags | ||
| ) |
Called to notify the D-Bus library when a previously-added watch is ready for reading or writing, or has an exception such as a hangup.
If this function returns FALSE, then the file descriptor may still be ready for reading or writing, but more memory is needed in order to do the reading or writing. If you ignore the FALSE return, your application may spin in a busy loop on the file descriptor until memory becomes available, but nothing more catastrophic should happen.
dbus_watch_handle() cannot be called during the DBusAddWatchFunction, as the connection will not be ready to handle that watch yet.
It is not allowed to reference a DBusWatch after it has been passed to remove_function.
| watch | the DBusWatch object. |
| flags | the poll condition using DBusWatchFlags values |
Definition at line 733 of file dbus-watch.c.
| void dbus_watch_set_data | ( | DBusWatch * | watch, |
| void * | data, | ||
| DBusFreeFunction | free_data_function | ||
| ) |
Sets data which can be retrieved with dbus_watch_get_data().
Intended for use by the DBusAddWatchFunction and DBusRemoveWatchFunction to store their own data. For example with Qt you might store the QSocketNotifier for this watch and with GLib you might store a GSource.
| watch | the DBusWatch object. |
| data | the data. |
| free_data_function | function to be called to free the data. |
Definition at line 677 of file dbus-watch.c.
References NULL.
1.9.4