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-de-
scriptor 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 param-
eters 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
https://gitlab.freedesktop.org/mesa/drm/-/issues
SEE ALSO
drm(7), drm-kms(7), drmModePageFlip(3), drmWaitVBlank(3)
September 2012 DRMHANDLEEVENT(3)
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