openbox lab initialized
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openflow/usr/include/xcb/xcbext.h
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259
openflow/usr/include/xcb/xcbext.h
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/*
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* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the names of the authors or their
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* institutions shall not be used in advertising or otherwise to promote the
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* sale, use or other dealings in this Software without prior written
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* authorization from the authors.
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*/
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#ifndef __XCBEXT_H
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#define __XCBEXT_H
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#include "xcb.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* xcb_ext.c */
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struct xcb_extension_t {
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const char *name;
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int global_id;
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};
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/* xcb_out.c */
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typedef struct {
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size_t count;
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xcb_extension_t *ext;
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uint8_t opcode;
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uint8_t isvoid;
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} xcb_protocol_request_t;
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enum xcb_send_request_flags_t {
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XCB_REQUEST_CHECKED = 1 << 0,
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XCB_REQUEST_RAW = 1 << 1,
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XCB_REQUEST_DISCARD_REPLY = 1 << 2,
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XCB_REQUEST_REPLY_FDS = 1 << 3
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};
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/**
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* @brief Send a request to the server.
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* @param c: The connection to the X server.
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* @param flags: A combination of flags from the xcb_send_request_flags_t enumeration.
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* @param vector: Data to send; must have two iovecs before start for internal use.
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* @param request: Information about the request to be sent.
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* @return The request's sequence number on success, 0 otherwise.
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*
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* This function sends a new request to the X server. The data of the request is
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* given as an array of @c iovecs in the @p vector argument. The length of that
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* array and the neccessary management information are given in the @p request
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* argument.
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*
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* When this function returns, the request might or might not be sent already.
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* Use xcb_flush() to make sure that it really was sent.
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*
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* Please note that this function is not the prefered way for sending requests.
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* It's better to use the generated wrapper functions.
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*
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* Please note that xcb might use index -1 and -2 of the @p vector array internally,
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* so they must be valid!
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*/
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unsigned int xcb_send_request(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request);
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/**
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* @brief Send a request to the server, with 64-bit sequence number returned.
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* @param c: The connection to the X server.
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* @param flags: A combination of flags from the xcb_send_request_flags_t enumeration.
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* @param vector: Data to send; must have two iovecs before start for internal use.
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* @param request: Information about the request to be sent.
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* @return The request's sequence number on success, 0 otherwise.
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*
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* This function sends a new request to the X server. The data of the request is
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* given as an array of @c iovecs in the @p vector argument. The length of that
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* array and the neccessary management information are given in the @p request
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* argument.
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*
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* When this function returns, the request might or might not be sent already.
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* Use xcb_flush() to make sure that it really was sent.
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*
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* Please note that this function is not the prefered way for sending requests.
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* It's better to use the generated wrapper functions.
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*
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* Please note that xcb might use index -1 and -2 of the @p vector array internally,
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* so they must be valid!
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*/
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uint64_t xcb_send_request64(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *request);
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/**
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* @brief Send a file descriptor to the server in the next call to xcb_send_request.
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* @param c: The connection to the X server.
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* @param fd: The file descriptor to send.
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*
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* After this function returns, the file descriptor given is owned by xcb and
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* will be closed eventually.
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*
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* FIXME: How the heck is this supposed to work in a thread-safe way? There is a
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* race between two threads doing xcb_send_fd(); xcb_send_request(); at the same
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* time.
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*/
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void xcb_send_fd(xcb_connection_t *c, int fd);
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/**
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* @brief Take over the write side of the socket
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* @param c: The connection to the X server.
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* @param return_socket: Callback function that will be called when xcb wants
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* to use the socket again.
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* @param closure: Argument to the callback function.
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* @param flags: A combination of flags from the xcb_send_request_flags_t enumeration.
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* @param sent: Location to the sequence number of the last sequence request.
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* Must not be NULL.
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* @return 1 on success, else 0.
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*
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* xcb_take_socket allows external code to ask XCB for permission to
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* take over the write side of the socket and send raw data with
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* xcb_writev. xcb_take_socket provides the sequence number of the last
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* request XCB sent. The caller of xcb_take_socket must supply a
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* callback which XCB can call when it wants the write side of the
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* socket back to make a request. This callback synchronizes with the
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* external socket owner and flushes any output queues if appropriate.
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* If you are sending requests which won't cause a reply, please note the
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* comment for xcb_writev which explains some sequence number wrap issues.
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*
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* All replies that are generated while the socket is owned externally have
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* @p flags applied to them. For example, use XCB_REQUEST_CHECK if you don't
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* want errors to go to xcb's normal error handling, but instead having to be
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* picked up via xcb_wait_for_reply(), xcb_poll_for_reply() or
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* xcb_request_check().
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*/
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int xcb_take_socket(xcb_connection_t *c, void (*return_socket)(void *closure), void *closure, int flags, uint64_t *sent);
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/**
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* @brief Send raw data to the X server.
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* @param c: The connection to the X server.
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* @param vector: Array of data to be sent.
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* @param count: Number of entries in @p vector.
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* @param requests: Number of requests that are being sent.
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* @return 1 on success, else 0.
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*
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* You must own the write-side of the socket (you've called
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* xcb_take_socket, and haven't returned from return_socket yet) to call
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* xcb_writev. Also, the iovec must have at least 1 byte of data in it.
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* You have to make sure that xcb can detect sequence number wraps correctly.
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* This means that the first request you send after xcb_take_socket must cause a
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* reply (e.g. just insert a GetInputFocus request). After every (1 << 16) - 1
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* requests without a reply, you have to insert a request which will cause a
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* reply. You can again use GetInputFocus for this. You do not have to wait for
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* any of the GetInputFocus replies, but can instead handle them via
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* xcb_discard_reply().
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*/
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int xcb_writev(xcb_connection_t *c, struct iovec *vector, int count, uint64_t requests);
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/* xcb_in.c */
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/**
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* @brief Wait for the reply of a given request.
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* @param c: The connection to the X server.
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* @param request: Sequence number of the request as returned by xcb_send_request().
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* @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
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*
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* Returns the reply to the given request or returns null in the event of
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* errors. Blocks until the reply or error for the request arrives, or an I/O
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* error occurs.
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*/
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void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e);
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/**
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* @brief Wait for the reply of a given request, with 64-bit sequence number
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* @param c: The connection to the X server.
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* @param request: 64-bit sequence number of the request as returned by xcb_send_request64().
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* @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
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*
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* Returns the reply to the given request or returns null in the event of
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* errors. Blocks until the reply or error for the request arrives, or an I/O
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* error occurs.
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*
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* Unlike its xcb_wait_for_reply() counterpart, the given sequence number is not
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* automatically "widened" to 64-bit.
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*/
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void *xcb_wait_for_reply64(xcb_connection_t *c, uint64_t request, xcb_generic_error_t **e);
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/**
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* @brief Poll for the reply of a given request.
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* @param c: The connection to the X server.
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* @param request: Sequence number of the request as returned by xcb_send_request().
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* @param reply: Location to store the reply in, must not be NULL.
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* @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
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* @return 1 when the reply to the request was returned, else 0.
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*
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* Checks if the reply to the given request already received. Does not block.
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*/
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int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error);
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/**
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* @brief Poll for the reply of a given request, with 64-bit sequence number.
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* @param c: The connection to the X server.
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* @param request: 64-bit sequence number of the request as returned by xcb_send_request().
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* @param reply: Location to store the reply in, must not be NULL.
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* @param e: Location to store errors in, or NULL. Ignored for unchecked requests.
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* @return 1 when the reply to the request was returned, else 0.
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*
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* Checks if the reply to the given request already received. Does not block.
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*
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* Unlike its xcb_poll_for_reply() counterpart, the given sequence number is not
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* automatically "widened" to 64-bit.
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*/
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int xcb_poll_for_reply64(xcb_connection_t *c, uint64_t request, void **reply, xcb_generic_error_t **error);
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/**
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* @brief Don't use this, only needed by the generated code.
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* @param c: The connection to the X server.
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* @param reply: A reply that was received from the server
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* @param replylen: The size of the reply.
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* @return Pointer to the location where received file descriptors are stored.
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*/
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int *xcb_get_reply_fds(xcb_connection_t *c, void *reply, size_t replylen);
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/* xcb_util.c */
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/**
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* @param mask: The mask to check
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* @return The number of set bits in the mask
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*/
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int xcb_popcount(uint32_t mask);
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/**
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* @param list: The base of an array
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* @param len: The length of the array
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* @return The sum of all entries in the array.
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*/
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int xcb_sumof(uint8_t *list, int len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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