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/* * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the names of the authors or their * institutions shall not be used in advertising or otherwise to promote the * sale, use or other dealings in this Software without prior written * authorization from the authors. */ #ifndef __XCBEXT_H #define __XCBEXT_H #include "xcb.h" #ifdef __cplusplus extern "C" { #endif /* xcb_ext.c */ struct xcb_extension_t { const char *name; int global_id; }; /* xcb_out.c */ typedef struct { size_t count; xcb_extension_t *ext; uint8_t opcode; uint8_t isvoid; } xcb_protocol_request_t; enum xcb_send_request_flags_t { XCB_REQUEST_CHECKED = 1 << 0, XCB_REQUEST_RAW = 1 << 1, XCB_REQUEST_DISCARD_REPLY = 1 << 2, XCB_REQUEST_REPLY_FDS = 1 << 3 }; /** * @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 necessary 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 preferred 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); /** * @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. * @param num_fds Number of additional file descriptors to send to the server * @param fds Additional file descriptors that should be send to the server. * @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 necessary management information are given in the @p request * argument. * * If @p num_fds is non-zero, @p fds points to an array of file descriptors that * will be sent to the X server along with this request. After this function * returns, all file descriptors sent are owned by xcb and will be closed * eventually. * * 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 preferred way for sending requests. * * 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_with_fds(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request, unsigned int num_fds, int *fds); /** * @brief Send a request to the server, with 64-bit sequence number returned. * @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 necessary 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 preferred 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! */ uint64_t xcb_send_request64(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request); /** * @brief Send a request to the server, with 64-bit sequence number returned. * @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. * @param num_fds Number of additional file descriptors to send to the server * @param fds Additional file descriptors that should be send to the server. * @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 necessary management information are given in the @p request * argument. * * If @p num_fds is non-zero, @p fds points to an array of file descriptors that * will be sent to the X server along with this request. After this function * returns, all file descriptors sent are owned by xcb and will be closed * eventually. * * 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 preferred 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! */ uint64_t xcb_send_request_with_fds64(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request, unsigned int num_fds, int *fds); /** * @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. * * @deprecated This function cannot be used in a thread-safe way. Two threads * that run xcb_send_fd(); xcb_send_request(); could mix up their file * descriptors. Instead, xcb_send_request_with_fds() should be used. */ 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_in.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 Wait for the reply of a given request, with 64-bit sequence number * @param c The connection to the X server. * @param request 64-bit sequence number of the request as returned by xcb_send_request64(). * @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. * * Unlike its xcb_wait_for_reply() counterpart, the given sequence number is not * automatically "widened" to 64-bit. */ void *xcb_wait_for_reply64(xcb_connection_t *c, uint64_t 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 error 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 Poll for the reply of a given request, with 64-bit sequence number. * @param c The connection to the X server. * @param request 64-bit sequence number of the request as returned by xcb_send_request(). * @param reply Location to store the reply in, must not be NULL. * @param error 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. * * Unlike its xcb_poll_for_reply() counterpart, the given sequence number is not * automatically "widened" to 64-bit. */ int xcb_poll_for_reply64(xcb_connection_t *c, uint64_t 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 */ /** * @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 } #endif #endif