3.5 windows xp ReactOS EiAllocatePool()

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道过 ExAllocatePool()分配缓冲区

EiAllocatePool()

道过 ExAllocatePool()分配缓冲区

/* FUNCTIONS ***************************************************************/

static PVOID STDCALL
EiAllocatePool(POOL_TYPE PoolType,
               ULONG NumberOfBytes,
               ULONG Tag,
               PVOID Caller)
{
   PVOID Block;

   /* FIXME: Handle SESSION_POOL_MASK, VERIFIER_POOL_MASK, QUOTA_POOL_MASK */
   if (PoolType & PAGED_POOL_MASK)//最低位为1
   {
      Block = ExAllocatePagedPoolWithTag(PoolType,NumberOfBytes,Tag);
   }
   else
   {
      Block = ExAllocateNonPagedPoolWithTag(PoolType,NumberOfBytes,Tag,Caller);
   }

   if ((PoolType & MUST_SUCCEED_POOL_MASK) && Block==NULL)
   {//只许成功不许失败，但是失败了
      KEBUGCHECK(MUST_SUCCEED_POOL_EMPTY);
   }
   return(Block);
}