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DRMHANDLEEVENT

Section: Direct Rendering Manager (3)
Updated: September 2012
Index Return to Main Contents
 

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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
REPORTING BUGS
SEE ALSO


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