xcb_shm_create_segment − Asks the server to allocate a shared memory segment.
#include <xcb/shm.h>
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); |
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;
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); |
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. |
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. |
Asks the server to allocate a shared memory segment. The serverâs reply will include a file descriptor for the client to pass to mmap().
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-requests(3) for details.
This request does never generate any errors.
xcb-requests(3)
Generated from shm.xml. Contact [email protected] for corrections and improvements.