Provides the application interface to obtain and relinquish the status of a graphics process through the Rendering Context Manager (RCM) device driver.
The rcm is used by graphics systems to obtain a gsc_handle. This handle is required in the call to aixgsc which is part of the procedure of becoming a graphics process.
The RCM device driver supports open, close, and ioctl subroutines.
A application uses the GSC_HANDLE
ioctl command to get a gsc_handle as part of becoming a graphics
process. When it closes rcm, either normally, or by abnormal
termination, the RCM releases any displays which it owns.
This is implemented as a LFT_REL_DISP ioctl command to the LFT
|IOCINFO||Returns devinfo structure.|
|GSC_HANDLE||Returns a gsc_handle.|
|RCM_SET_DIAG_OWNER||Obtain exclusive use of the display adapter for diagnostics.|
The rcm special file is part of Base Operating System (BOS) Runtime.
lft Special File.
Special Files Overview .