HDD_TAP_Disable.c

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#include "FBLib_tap.h"
 
bool HDD_TAP_Disable(dword TAPID, bool DisableEvents)
{
  TRACEENTER();
 
  int                   TAPIndex;
  dword                 isDisabled;
  tTMSTAPTaskTable     *TMSTAPTaskTable;
 
  TAPIndex = HDD_TAP_GetIndexByID(TAPID);
  if((TAPIndex == -1) || (!LibInitialized && !InitTAPex()))
  {
    TRACEEXIT();
    return FALSE;
  }
 
  //Don't disable ourself
  if((dword)TAPIndex == TAP_TableIndex)
  {
    TRACEEXIT();
    return FALSE;
  }
 
  //The TAP has already the requested state
  isDisabled = HDD_TAP_isDisabled(TAPID);
  if((isDisabled == 1) == DisableEvents)
  {
    TRACEEXIT();
    return FALSE;
  }
 
  TMSTAPTaskTable = (tTMSTAPTaskTable*)FIS_vTAPTable();
  if(!TMSTAPTaskTable)
  {
    TRACEEXIT();
    return FALSE;
  }
 
  //The TAP will terminate soon
  if(TMSTAPTaskTable[TAPIndex].Status != 1)
  {
    TRACEEXIT();
    return FALSE;
  }
 
  //Abuse tTMSTAPTaskTable.unused5 as temporary storage for the event handler address
  if(DisableEvents)
  {
    TMSTAPTaskTable[TAPIndex].unused5 = TMSTAPTaskTable[TAPIndex].TAP_EventHandler;
    TMSTAPTaskTable[TAPIndex].TAP_EventHandler = (dword)&HDD_TAP_DisabledEventHandler;
  }
  else
  {
    TMSTAPTaskTable[TAPIndex].TAP_EventHandler = TMSTAPTaskTable[TAPIndex].unused5;
    TMSTAPTaskTable[TAPIndex].unused5 = 0;
  }
 
  TRACEEXIT();
  return TRUE;
}