/* xcb_ext.c */
-struct XCBExtension {
+struct xcb_extension_t {
const char *name;
int global_id;
};
typedef struct {
size_t count;
- XCBExtension *ext;
- CARD8 opcode;
- BOOL isvoid;
-} XCBProtocolRequest;
+ xcb_extension_t *ext;
+ uint8_t opcode;
+ uint8_t isvoid;
+} xcb_protocol_request_t;
-enum XCBSendRequestFlags {
+enum xcb_send_request_flags_t {
XCB_REQUEST_CHECKED = 1 << 0,
XCB_REQUEST_RAW = 1 << 1,
- XCB_REQUEST_DISCARD_REPLY = 1 << 2
+ XCB_REQUEST_DISCARD_REPLY = 1 << 2,
+ XCB_REQUEST_REPLY_FDS = 1 << 3
};
-unsigned int XCBSendRequest(XCBConnection *c, int flags, struct iovec *vector, const XCBProtocolRequest *request);
-
-
-/* xcb_in.c */
+/**
+ * @brief Send a request to the server.
+ * @param c: The connection to the X server.
+ * @param flags: A combination of flags from the xcb_send_request_flags_t enumeration.
+ * @param vector: Data to send; must have two iovecs before start for internal use.
+ * @param request: Information about the request to be sent.
+ * @return The request's sequence number on success, 0 otherwise.
+ *
+ * This function sends a new request to the X server. The data of the request is
+ * given as an array of @c iovecs in the @p vector argument. The length of that
+ * array and the neccessary management information are given in the @p request
+ * argument.
+ *
+ * When this function returns, the request might or might not be sent already.
+ * Use xcb_flush() to make sure that it really was sent.
+ *
+ * Please note that this function is not the prefered way for sending requests.
+ * It's better to use the generated wrapper functions.
+ *
+ * Please note that xcb might use index -1 and -2 of the @p vector array internally,
+ * so they must be valid!
+ */
+unsigned int xcb_send_request(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request);
-void *XCBWaitForReply(XCBConnection *c, unsigned int request, XCBGenericError **e);
+/**
+ * @brief Send a file descriptor to the server in the next call to xcb_send_request.
+ * @param c: The connection to the X server.
+ * @param fd: The file descriptor to send.
+ *
+ * After this function returns, the file descriptor given is owned by xcb and
+ * will be closed eventually.
+ *
+ * FIXME: How the heck is this supposed to work in a thread-safe way? There is a
+ * race between two threads doing xcb_send_fd(); xcb_send_request(); at the same
+ * time.
+ */
+void xcb_send_fd(xcb_connection_t *c, int fd);
+
+/**
+ * @brief Take over the write side of the socket
+ * @param c: The connection to the X server.
+ * @param return_socket: Callback function that will be called when xcb wants
+ * to use the socket again.
+ * @param closure: Argument to the callback function.
+ * @param flags: A combination of flags from the xcb_send_request_flags_t enumeration.
+ * @param sent: Location to the sequence number of the last sequence request.
+ * Must not be NULL.
+ * @return 1 on success, else 0.
+ *
+ * xcb_take_socket allows external code to ask XCB for permission to
+ * take over the write side of the socket and send raw data with
+ * xcb_writev. xcb_take_socket provides the sequence number of the last
+ * request XCB sent. The caller of xcb_take_socket must supply a
+ * callback which XCB can call when it wants the write side of the
+ * socket back to make a request. This callback synchronizes with the
+ * external socket owner and flushes any output queues if appropriate.
+ * If you are sending requests which won't cause a reply, please note the
+ * comment for xcb_writev which explains some sequence number wrap issues.
+ *
+ * All replies that are generated while the socket is owned externally have
+ * @p flags applied to them. For example, use XCB_REQUEST_CHECK if you don't
+ * want errors to go to xcb's normal error handling, but instead having to be
+ * picked up via xcb_wait_for_reply(), xcb_poll_for_reply() or
+ * xcb_request_check().
+ */
+int xcb_take_socket(xcb_connection_t *c, void (*return_socket)(void *closure), void *closure, int flags, uint64_t *sent);
+
+/**
+ * @brief Send raw data to the X server.
+ * @param c: The connection to the X server.
+ * @param vector: Array of data to be sent.
+ * @param count: Number of entries in @p vector.
+ * @param requests: Number of requests that are being sent.
+ * @return 1 on success, else 0.
+ *
+ * You must own the write-side of the socket (you've called
+ * xcb_take_socket, and haven't returned from return_socket yet) to call
+ * xcb_writev. Also, the iovec must have at least 1 byte of data in it.
+ * You have to make sure that xcb can detect sequence number wraps correctly.
+ * This means that the first request you send after xcb_take_socket must cause a
+ * reply (e.g. just insert a GetInputFocus request). After every (1 << 16) - 1
+ * requests without a reply, you have to insert a request which will cause a
+ * reply. You can again use GetInputFocus for this. You do not have to wait for
+ * any of the GetInputFocus replies, but can instead handle them via
+ * xcb_discard_reply().
+ */
+int xcb_writev(xcb_connection_t *c, struct iovec *vector, int count, uint64_t requests);
-/* xcb_xid.c */
+/* xcb_in.c */
-CARD32 XCBGenerateID(XCBConnection *c);
+/**
+ * @brief Wait for the reply of a given request.
+ * @param c: The connection to the X server.
+ * @param request: Sequence number of the request as returned by xcb_send_request().
+ * @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
+ *
+ * Returns the reply to the given request or returns null in the event of
+ * errors. Blocks until the reply or error for the request arrives, or an I/O
+ * error occurs.
+ */
+void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e);
+
+/**
+ * @brief Poll for the reply of a given request.
+ * @param c: The connection to the X server.
+ * @param request: Sequence number of the request as returned by xcb_send_request().
+ * @param reply: Location to store the reply in, must not be NULL.
+ * @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
+ * @return 1 when the reply to the request was returned, else 0.
+ *
+ * Checks if the reply to the given request already received. Does not block.
+ */
+int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error);
+
+/**
+ * @brief Don't use this, only needed by the generated code.
+ * @param c: The connection to the X server.
+ * @param reply: A reply that was received from the server
+ * @param replylen: The size of the reply.
+ * @return Pointer to the location where received file descriptors are stored.
+ */
+int *xcb_get_reply_fds(xcb_connection_t *c, void *reply, size_t replylen);
/* xcb_util.c */
-int XCBPopcount(CARD32 mask);
+/**
+ * @param mask: The mask to check
+ * @return The number of set bits in the mask
+ */
+int xcb_popcount(uint32_t mask);
+
+/**
+ * @param list: The base of an array
+ * @param len: The length of the array
+ * @return The sum of all entries in the array.
+ */
+int xcb_sumof(uint8_t *list, int len);
#ifdef __cplusplus
}
projects / free-sw / xcb / libxcb / blobdiff