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 component.

SEE ALSO¶

drmModePageFlip(3), drmWaitVBlank(3)