xcb_shm_create_segment - Asks the server to allocate a shared memory segment.

       Generated from shm.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.

X Version 11                                      libxcb 1.17.0                        xcb_shm_create_segment(3)

       Asks the server to allocate a shared memory segment.  The server’s reply will include a  file  descriptor
       for the client to pass to mmap().

       This request does never generate any errors.

       xcb_shm_create_segment - Asks the server to allocate a shared memory segment.

response_type
                 The  type of this reply, in this case XCB_SHM_CREATE_SEGMENT. This field is also present in the
                 xcb_generic_reply_t and can be used to tell replies apart from each other.

       sequence  The sequence number of the last request processed by the X11 server.

       length    The length of the reply, in words (a word is 4 bytes).

       nfd       The number of file descriptors sent by the server.  Will always be 1.

       shm_fd    TODO: NOT YET DOCUMENTED.

conn      The XCB connection to X11.

       shmseg    A shared memory segment ID created with xcb_generate_id().

       size      The size of the segment to create.

       read_only True if the server should map the segment read-only; otherwise false.

       Returns  an  xcb_shm_create_segment_cookie_t.  Errors  have to be handled when calling the reply function
       xcb_shm_create_segment_reply.

       If you want to handle errors in the event loop instead, use xcb_shm_create_segment_unchecked. See xcb-re‐quests(3) for details.

xcb-requests(3)

#include<xcb/shm.h>Requestfunction

       xcb_shm_create_segment_cookie_t xcb_shm_create_segment(xcb_connection_t *conn, xcb_shm_seg_t shmseg,
              uint32_t size, uint8_t read_only);

   Replydatastructure
       typedef struct xcb_shm_create_segment_reply_t {
           uint8_t  response_type;
           uint8_t  nfd;
           uint16_t sequence;
           uint32_t length;
           uint8_t  pad0[24];
       } xcb_shm_create_segment_reply_t;

   Replyfunction

       xcb_shm_create_segment_reply_t *xcb_shm_create_segment_reply(xcb_connection_t *conn,
              xcb_shm_create_segment_cookie_t cookie, xcb_generic_error_t **e);