DevHelp FreeReqPacket

This service releases a request packet previously allocated by AllocReqPacket.

Syntax

C

USHORT APIENTRY DevHelp_FreeReqPacket( PBYTE ReqPktAddr );

Assembler

LES   BX,request_packet          ; Pointer to request packet previously allocated
MOV   DL,DevHlp_FreeReqPacket

CALL  [Device_Help]

Parameters

C

ReqPktAddr (PBYTE)  

Pointer to request packet previously allocated.

Assembler

LES   BX,request_packet          ; Pointer to request packet previously allocated

Return Code

C

Success Indicator

None.

Possible errors

None.

Assembler

None .

Remarks

The physical device driver should only free those request packets that were previously allocated by AllocReqPacket The DevHlp_DevDone must not be used to return an allocated request packet. The system has a limited number of request packets, so it is important that a physical device driver not allocate request packets and hold them for future use.

The state of the interrupt flag is not preserved across calls to this DevHlp.

Example Code

C

#include  "dhcalls.h"

USHORT APIENTRY DevHelp_FreeReqPacket( PBYTE ReqPktAddr );