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HWREQIN Field - ulFlags

 

 ulFlags (ULONG) 
    Request option flags. 

    Request option flags can be defined as follows: 

    #define REQUEST_HW                 0x01 
    #define REQUEST_SEM_ONLY           0x02 

    If the REQUEST_HW flag is set, the VMAN hardware serialization lock is 
    obtained, and pointer exclusion is performed. 

      *  If the REQUEST_HW flag is set and the REQUEST_SEM_ONLY flag is 
         not set, VMAN invokes the GRADD for GHI_CMD_REQUESTHW to request 
         the linear aperture to the frame buffer. 
      *  If the REQUEST_HW flag is set and the REQUEST_SEM_ONLY flag is 
         set, VMAN does not invoke the GRADD for GHI_CMD_REQUESTHW. 

    If the REQUEST_HW flag is not set, the VMAN hardware serialization 
    lock is released, and pointer exclusion is ended. 

      *  If the REQUEST_HW flag is not set and the REQUEST_SEM_ONLY flag 
         is not set, VMAN invokes the GRADD for GHI_CMD_REQUESTHW to 
         release the linear aperture to the frame buffer. 
      *  If the REQUEST_HW flag is not set and the REQUEST_SEM_ONLY flag 
         is set, VMAN does not invoke the GRADD for GHI_CMD_REQUESTHW.
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