SIMPLE SOLUTIONS

DRMHANDLEEVENT(3) - Linux man page online | Library functions

Read and process pending DRM events.

Chapter
September 2012
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 https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=libdrm under the "DRI" product, component "libdrm"

SEE ALSO

drm(7), drm-kms(7), drmModePageFlip(3), drmWaitVBlank(3)
libdrm September 2012 DRMHANDLEEVENT(3)
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drmHandleEvent(3) referred by
refer to drm(7) | drm-kms(7)
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