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)