debian man page for drmhandleevent

drmHandleEvent(libdrm 2.4.40)											     drmHandleEvent(libdrm 2.4.40)

NAME
       drmHandleEvent - read and process pending DRM events

SYNOPSIS
       #include <xf86drm.h>

       typedef struct _drmEventContext {
	    int version;
	    void (*vblank_handler)(int fd,
			     unsigned int sequence,
			     unsigned int tv_sec,
			     unsigned int tv_usec,
			     void *user_data);
	    void (*page_flip_handler)(int fd,
			     unsigned int sequence,
			     unsigned int tv_sec,
			     unsigned int tv_usec,
			     void *user_data);
       } drmEventContext, *drmEventContextPtr;

       int drmHandleEvent(int fd, drmEventContextPtr evctx);

DESCRIPTION
       This  function  will process outstanding DRM events on fd , which must be an open DRM device.  This function should be called after the DRM
       file descriptor has polled readable; it will read the events and use the passed-in evctx structure  to  call  function  pointers  with  the
       parameters noted above.

RETURN VALUE
       Returns	0  on  success,  or  if there is no data to read from the file descriptor.  Returns -1 if the read on the file descriptor fails or
       returns less than a full event record.

REPORTING BUGS
       Bugs in this function should be reported to http://bugs.freedesktop.org under the "Mesa" product, with "Other" or "libdrm"  as  the  compo-
       nent.

SEE ALSO
       drmModePageFlip(3), drmWaitVBlank(3)

														     drmHandleEvent(libdrm 2.4.40)