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Programming
Segmentation fault in fopen when in write mode.
Post 302672423 by alister on Monday 16th of July 2012 10:49:45 AM
07-16-2012
Hello, shoaibjameel123:
On an unrelated note, I'm curious about something. I've noticed in your last couple of C threads that your main() prototype is using fixed-width integer types. Why are you using int32_t instead of plain int?
On a typical server or desktop system, int32_t is almost certainly a typedef (or a typedef of a typedef) of int anyway, so it doesn't cause a problem (at least until we move to 256 bit systems
). All joking aside, it seems to me an unnecessarily restrictive choice.
Regards,
Alister
On an unrelated note, I'm curious about something. I've noticed in your last couple of C threads that your main() prototype is using fixed-width integer types. Why are you using int32_t instead of plain int?
On a typical server or desktop system, int32_t is almost certainly a typedef (or a typedef of a typedef) of int anyway, so it doesn't cause a problem (at least until we move to 256 bit systems
). All joking aside, it seems to me an unnecessarily restrictive choice.Regards,
Alister
Last edited by alister; 07-16-2012 at 11:53 AM.. Reason: typo/grammar
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LEARN ABOUT CENTOS
xcb_glx_read_pixels
xcb_glx_read_pixels(3) XCB Requests xcb_glx_read_pixels(3) NAME
xcb_glx_read_pixels - SYNOPSIS
#include <xcb/glx.h> Request function xcb_glx_read_pixels_cookie_t xcb_glx_read_pixels(xcb_connection_t *conn, xcb_glx_context_tag_t context_tag, int32_t x, int32_t y, int32_t width, int32_t height, uint32_t format, uint32_t type, uint8_t swap_bytes, uint8_t lsb_first); Reply datastructure typedef struct xcb_glx_read_pixels_reply_t { uint8_t response_type; uint8_t pad0; uint16_t sequence; uint32_t length; uint8_t pad1[24]; } xcb_glx_read_pixels_reply_t; Reply function xcb_glx_read_pixels_reply_t *xcb_glx_read_pixels_reply(xcb_connection_t *conn, xcb_glx_read_pixels_cookie_t cookie, xcb_generic_error_t **e); Reply accessors uint8_t *xcb_glx_read_pixels_data(const xcb_glx_read_pixels_request_t *reply); int xcb_glx_read_pixels_data_length(const xcb_glx_read_pixels_reply_t *reply); xcb_generic_iterator_t xcb_glx_read_pixels_data_end(const xcb_glx_read_pixels_reply_t *reply); REQUEST ARGUMENTS
conn The XCB connection to X11. context_tag TODO: NOT YET DOCUMENTED. x TODO: NOT YET DOCUMENTED. y TODO: NOT YET DOCUMENTED. width TODO: NOT YET DOCUMENTED. height TODO: NOT YET DOCUMENTED. format TODO: NOT YET DOCUMENTED. type TODO: NOT YET DOCUMENTED. swap_bytes TODO: NOT YET DOCUMENTED. lsb_first TODO: NOT YET DOCUMENTED. REPLY FIELDS
response_type The type of this reply, in this case XCB_GLX_READ_PIXELS. 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). DESCRIPTION
RETURN VALUE
Returns an xcb_glx_read_pixels_cookie_t. Errors have to be handled when calling the reply function xcb_glx_read_pixels_reply. If you want to handle errors in the event loop instead, use xcb_glx_read_pixels_unchecked. See xcb-requests(3) for details. ERRORS
This request does never generate any errors. SEE ALSO
AUTHOR
Generated from glx.xml. Contact xcb@lists.freedesktop.org for corrections and improvements. XCB
2014-06-10 xcb_glx_read_pixels(3)