jpayne@69: /*
jpayne@69:  * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
jpayne@69:  * All Rights Reserved.
jpayne@69:  *
jpayne@69:  * Permission is hereby granted, free of charge, to any person obtaining a
jpayne@69:  * copy of this software and associated documentation files (the "Software"),
jpayne@69:  * to deal in the Software without restriction, including without limitation
jpayne@69:  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
jpayne@69:  * and/or sell copies of the Software, and to permit persons to whom the
jpayne@69:  * Software is furnished to do so, subject to the following conditions:
jpayne@69:  * 
jpayne@69:  * The above copyright notice and this permission notice shall be included in
jpayne@69:  * all copies or substantial portions of the Software.
jpayne@69:  * 
jpayne@69:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jpayne@69:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jpayne@69:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jpayne@69:  * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
jpayne@69:  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
jpayne@69:  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
jpayne@69:  * 
jpayne@69:  * Except as contained in this notice, the names of the authors or their
jpayne@69:  * institutions shall not be used in advertising or otherwise to promote the
jpayne@69:  * sale, use or other dealings in this Software without prior written
jpayne@69:  * authorization from the authors.
jpayne@69:  */
jpayne@69: 
jpayne@69: #ifndef __XCBEXT_H
jpayne@69: #define __XCBEXT_H
jpayne@69: 
jpayne@69: #include "xcb.h"
jpayne@69: 
jpayne@69: #ifdef __cplusplus
jpayne@69: extern "C" {
jpayne@69: #endif
jpayne@69: 
jpayne@69: /* xcb_ext.c */
jpayne@69: 
jpayne@69: struct xcb_extension_t {
jpayne@69:     const char *name;
jpayne@69:     int global_id;
jpayne@69: };
jpayne@69: 
jpayne@69: 
jpayne@69: /* xcb_out.c */
jpayne@69: 
jpayne@69: typedef struct {
jpayne@69:     size_t count;
jpayne@69:     xcb_extension_t *ext;
jpayne@69:     uint8_t opcode;
jpayne@69:     uint8_t isvoid;
jpayne@69: } xcb_protocol_request_t;
jpayne@69: 
jpayne@69: enum xcb_send_request_flags_t {
jpayne@69:     XCB_REQUEST_CHECKED = 1 << 0,
jpayne@69:     XCB_REQUEST_RAW = 1 << 1,
jpayne@69:     XCB_REQUEST_DISCARD_REPLY = 1 << 2,
jpayne@69:     XCB_REQUEST_REPLY_FDS = 1 << 3
jpayne@69: };
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send a request to the server.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param flags A combination of flags from the xcb_send_request_flags_t enumeration.
jpayne@69:  * @param vector Data to send; must have two iovecs before start for internal use.
jpayne@69:  * @param request Information about the request to be sent.
jpayne@69:  * @return The request's sequence number on success, 0 otherwise.
jpayne@69:  *
jpayne@69:  * This function sends a new request to the X server. The data of the request is
jpayne@69:  * given as an array of @c iovecs in the @p vector argument. The length of that
jpayne@69:  * array and the necessary management information are given in the @p request
jpayne@69:  * argument.
jpayne@69:  *
jpayne@69:  * When this function returns, the request might or might not be sent already.
jpayne@69:  * Use xcb_flush() to make sure that it really was sent.
jpayne@69:  *
jpayne@69:  * Please note that this function is not the preferred way for sending requests.
jpayne@69:  * It's better to use the generated wrapper functions.
jpayne@69:  *
jpayne@69:  * Please note that xcb might use index -1 and -2 of the @p vector array internally,
jpayne@69:  * so they must be valid!
jpayne@69:  */
jpayne@69: unsigned int xcb_send_request(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send a request to the server.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param flags A combination of flags from the xcb_send_request_flags_t enumeration.
jpayne@69:  * @param vector Data to send; must have two iovecs before start for internal use.
jpayne@69:  * @param request Information about the request to be sent.
jpayne@69:  * @param num_fds Number of additional file descriptors to send to the server
jpayne@69:  * @param fds Additional file descriptors that should be send to the server.
jpayne@69:  * @return The request's sequence number on success, 0 otherwise.
jpayne@69:  *
jpayne@69:  * This function sends a new request to the X server. The data of the request is
jpayne@69:  * given as an array of @c iovecs in the @p vector argument. The length of that
jpayne@69:  * array and the necessary management information are given in the @p request
jpayne@69:  * argument.
jpayne@69:  *
jpayne@69:  * If @p num_fds is non-zero, @p fds points to an array of file descriptors that
jpayne@69:  * will be sent to the X server along with this request. After this function
jpayne@69:  * returns, all file descriptors sent are owned by xcb and will be closed
jpayne@69:  * eventually.
jpayne@69:  *
jpayne@69:  * When this function returns, the request might or might not be sent already.
jpayne@69:  * Use xcb_flush() to make sure that it really was sent.
jpayne@69:  *
jpayne@69:  * Please note that this function is not the preferred way for sending requests.
jpayne@69:  *
jpayne@69:  * Please note that xcb might use index -1 and -2 of the @p vector array internally,
jpayne@69:  * so they must be valid!
jpayne@69:  */
jpayne@69: unsigned int xcb_send_request_with_fds(xcb_connection_t *c, int flags, struct iovec *vector,
jpayne@69:                 const xcb_protocol_request_t *request, unsigned int num_fds, int *fds);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send a request to the server, with 64-bit sequence number returned.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param flags A combination of flags from the xcb_send_request_flags_t enumeration.
jpayne@69:  * @param vector Data to send; must have two iovecs before start for internal use.
jpayne@69:  * @param request Information about the request to be sent.
jpayne@69:  * @return The request's sequence number on success, 0 otherwise.
jpayne@69:  *
jpayne@69:  * This function sends a new request to the X server. The data of the request is
jpayne@69:  * given as an array of @c iovecs in the @p vector argument. The length of that
jpayne@69:  * array and the necessary management information are given in the @p request
jpayne@69:  * argument.
jpayne@69:  *
jpayne@69:  * When this function returns, the request might or might not be sent already.
jpayne@69:  * Use xcb_flush() to make sure that it really was sent.
jpayne@69:  *
jpayne@69:  * Please note that this function is not the preferred way for sending requests.
jpayne@69:  * It's better to use the generated wrapper functions.
jpayne@69:  *
jpayne@69:  * Please note that xcb might use index -1 and -2 of the @p vector array internally,
jpayne@69:  * so they must be valid!
jpayne@69:  */
jpayne@69: uint64_t xcb_send_request64(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send a request to the server, with 64-bit sequence number returned.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param flags A combination of flags from the xcb_send_request_flags_t enumeration.
jpayne@69:  * @param vector Data to send; must have two iovecs before start for internal use.
jpayne@69:  * @param request Information about the request to be sent.
jpayne@69:  * @param num_fds Number of additional file descriptors to send to the server
jpayne@69:  * @param fds Additional file descriptors that should be send to the server.
jpayne@69:  * @return The request's sequence number on success, 0 otherwise.
jpayne@69:  *
jpayne@69:  * This function sends a new request to the X server. The data of the request is
jpayne@69:  * given as an array of @c iovecs in the @p vector argument. The length of that
jpayne@69:  * array and the necessary management information are given in the @p request
jpayne@69:  * argument.
jpayne@69:  *
jpayne@69:  * If @p num_fds is non-zero, @p fds points to an array of file descriptors that
jpayne@69:  * will be sent to the X server along with this request. After this function
jpayne@69:  * returns, all file descriptors sent are owned by xcb and will be closed
jpayne@69:  * eventually.
jpayne@69:  *
jpayne@69:  * When this function returns, the request might or might not be sent already.
jpayne@69:  * Use xcb_flush() to make sure that it really was sent.
jpayne@69:  *
jpayne@69:  * Please note that this function is not the preferred way for sending requests.
jpayne@69:  * It's better to use the generated wrapper functions.
jpayne@69:  *
jpayne@69:  * Please note that xcb might use index -1 and -2 of the @p vector array internally,
jpayne@69:  * so they must be valid!
jpayne@69:  */
jpayne@69: uint64_t xcb_send_request_with_fds64(xcb_connection_t *c, int flags, struct iovec *vector,
jpayne@69:                 const xcb_protocol_request_t *request, unsigned int num_fds, int *fds);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send a file descriptor to the server in the next call to xcb_send_request.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param fd The file descriptor to send.
jpayne@69:  *
jpayne@69:  * After this function returns, the file descriptor given is owned by xcb and
jpayne@69:  * will be closed eventually.
jpayne@69:  *
jpayne@69:  * @deprecated This function cannot be used in a thread-safe way. Two threads
jpayne@69:  * that run xcb_send_fd(); xcb_send_request(); could mix up their file
jpayne@69:  * descriptors. Instead, xcb_send_request_with_fds() should be used.
jpayne@69:  */
jpayne@69: void xcb_send_fd(xcb_connection_t *c, int fd);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Take over the write side of the socket
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param return_socket Callback function that will be called when xcb wants
jpayne@69:  *                        to use the socket again.
jpayne@69:  * @param closure Argument to the callback function.
jpayne@69:  * @param flags A combination of flags from the xcb_send_request_flags_t enumeration.
jpayne@69:  * @param sent Location to the sequence number of the last sequence request.
jpayne@69:  *              Must not be NULL.
jpayne@69:  * @return 1 on success, else 0.
jpayne@69:  *
jpayne@69:  * xcb_take_socket allows external code to ask XCB for permission to
jpayne@69:  * take over the write side of the socket and send raw data with
jpayne@69:  * xcb_writev. xcb_take_socket provides the sequence number of the last
jpayne@69:  * request XCB sent. The caller of xcb_take_socket must supply a
jpayne@69:  * callback which XCB can call when it wants the write side of the
jpayne@69:  * socket back to make a request. This callback synchronizes with the
jpayne@69:  * external socket owner and flushes any output queues if appropriate.
jpayne@69:  * If you are sending requests which won't cause a reply, please note the
jpayne@69:  * comment for xcb_writev which explains some sequence number wrap issues.
jpayne@69:  *
jpayne@69:  * All replies that are generated while the socket is owned externally have
jpayne@69:  * @p flags applied to them. For example, use XCB_REQUEST_CHECK if you don't
jpayne@69:  * want errors to go to xcb's normal error handling, but instead having to be
jpayne@69:  * picked up via xcb_wait_for_reply(), xcb_poll_for_reply() or
jpayne@69:  * xcb_request_check().
jpayne@69:  */
jpayne@69: int xcb_take_socket(xcb_connection_t *c, void (*return_socket)(void *closure), void *closure, int flags, uint64_t *sent);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Send raw data to the X server.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param vector Array of data to be sent.
jpayne@69:  * @param count Number of entries in @p vector.
jpayne@69:  * @param requests Number of requests that are being sent.
jpayne@69:  * @return 1 on success, else 0.
jpayne@69:  *
jpayne@69:  * You must own the write-side of the socket (you've called
jpayne@69:  * xcb_take_socket, and haven't returned from return_socket yet) to call
jpayne@69:  * xcb_writev. Also, the iovec must have at least 1 byte of data in it.
jpayne@69:  * You have to make sure that xcb can detect sequence number wraps correctly.
jpayne@69:  * This means that the first request you send after xcb_take_socket must cause a
jpayne@69:  * reply (e.g. just insert a GetInputFocus request). After every (1 << 16) - 1
jpayne@69:  * requests without a reply, you have to insert a request which will cause a
jpayne@69:  * reply. You can again use GetInputFocus for this. You do not have to wait for
jpayne@69:  * any of the GetInputFocus replies, but can instead handle them via
jpayne@69:  * xcb_discard_reply().
jpayne@69:  */
jpayne@69: int xcb_writev(xcb_connection_t *c, struct iovec *vector, int count, uint64_t requests);
jpayne@69: 
jpayne@69: 
jpayne@69: /* xcb_in.c */
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Wait for the reply of a given request.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param request Sequence number of the request as returned by xcb_send_request().
jpayne@69:  * @param e Location to store errors in, or NULL. Ignored for unchecked requests.
jpayne@69:  *
jpayne@69:  * Returns the reply to the given request or returns null in the event of
jpayne@69:  * errors. Blocks until the reply or error for the request arrives, or an I/O
jpayne@69:  * error occurs.
jpayne@69:  */
jpayne@69: void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Wait for the reply of a given request, with 64-bit sequence number
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param request 64-bit sequence number of the request as returned by xcb_send_request64().
jpayne@69:  * @param e Location to store errors in, or NULL. Ignored for unchecked requests.
jpayne@69:  *
jpayne@69:  * Returns the reply to the given request or returns null in the event of
jpayne@69:  * errors. Blocks until the reply or error for the request arrives, or an I/O
jpayne@69:  * error occurs.
jpayne@69:  *
jpayne@69:  * Unlike its xcb_wait_for_reply() counterpart, the given sequence number is not
jpayne@69:  * automatically "widened" to 64-bit.
jpayne@69:  */
jpayne@69: void *xcb_wait_for_reply64(xcb_connection_t *c, uint64_t request, xcb_generic_error_t **e);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Poll for the reply of a given request.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param request Sequence number of the request as returned by xcb_send_request().
jpayne@69:  * @param reply Location to store the reply in, must not be NULL.
jpayne@69:  * @param error Location to store errors in, or NULL. Ignored for unchecked requests.
jpayne@69:  * @return 1 when the reply to the request was returned, else 0.
jpayne@69:  *
jpayne@69:  * Checks if the reply to the given request already received. Does not block.
jpayne@69:  */
jpayne@69: int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Poll for the reply of a given request, with 64-bit sequence number.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param request 64-bit sequence number of the request as returned by xcb_send_request().
jpayne@69:  * @param reply Location to store the reply in, must not be NULL.
jpayne@69:  * @param error Location to store errors in, or NULL. Ignored for unchecked requests.
jpayne@69:  * @return 1 when the reply to the request was returned, else 0.
jpayne@69:  *
jpayne@69:  * Checks if the reply to the given request already received. Does not block.
jpayne@69:  *
jpayne@69:  * Unlike its xcb_poll_for_reply() counterpart, the given sequence number is not
jpayne@69:  * automatically "widened" to 64-bit.
jpayne@69:  */
jpayne@69: int xcb_poll_for_reply64(xcb_connection_t *c, uint64_t request, void **reply, xcb_generic_error_t **error);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @brief Don't use this, only needed by the generated code.
jpayne@69:  * @param c The connection to the X server.
jpayne@69:  * @param reply A reply that was received from the server
jpayne@69:  * @param replylen The size of the reply.
jpayne@69:  * @return Pointer to the location where received file descriptors are stored.
jpayne@69:  */
jpayne@69: int *xcb_get_reply_fds(xcb_connection_t *c, void *reply, size_t replylen);
jpayne@69: 
jpayne@69: 
jpayne@69: /* xcb_util.c */
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @param mask The mask to check
jpayne@69:  * @return The number of set bits in the mask
jpayne@69:  */
jpayne@69: int xcb_popcount(uint32_t mask);
jpayne@69: 
jpayne@69: /**
jpayne@69:  * @param list The base of an array
jpayne@69:  * @param len The length of the array
jpayne@69:  * @return The sum of all entries in the array.
jpayne@69:  */
jpayne@69: int xcb_sumof(uint8_t *list, int len);
jpayne@69: 
jpayne@69: #ifdef __cplusplus
jpayne@69: }
jpayne@69: #endif
jpayne@69: 
jpayne@69: #endif