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- ==============
- drmHandleEvent
- ==============
- -----------------------------------
- read and process pending DRM events
- -----------------------------------
- :Date: September 2012
- :Manual section: 3
- :Manual group: Direct Rendering Manager
- 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://gitlab.freedesktop.org/mesa/libdrm/-/issues
- See Also
- ========
- **drm**\ (7), **drm-kms**\ (7), **drmModePageFlip**\ (3),
- **drmWaitVBlank**\ (3)
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