bionic (3) drmHandleEvent.3.gz

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)