PXE_CPB_START_30.Block

PXE_VOID Block(UINT32 enable);

UNDI may need to block multi-threaded/multi-processor access to critical code sections when programming or accessing the network device. To this end, a blocking service is needed by the UNDI. When UNDI needs a block, it will call Block() passing a non-zero value. When UNDI no longer needs a block, it will call Block() with a zero value. When called, if the Block() is already enabled, do not return control to the UNDI until the previous Block() is disabled.

This field cannot be set to zero.

struct PXE_CPB_START_30
UINT64 Block;

Meta