centos man page for drmhandleevent

DRMHANDLEEVENT(3)					     Direct Rendering Manager						 DRMHANDLEEVENT(3)

NAME
       drmHandleEvent - read and process pending DRM events

SYNOPSIS
       #include <xf86drm.h>

       int drmHandleEvent(int fd, drmEventContextPtr evctx);

DESCRIPTION
       drmHandleEvent processes outstanding DRM events on the DRM file-descriptor passed as fd. 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 below:

	   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;

RETURN VALUE
       drmHandleEvent 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
       component.

SEE ALSO
       drm(7), drm-kms(7), drmModePageFlip(3), drmWaitVBlank(3)

libdrm								  September 2012						 DRMHANDLEEVENT(3)