BOOL WINAPI GetMailslotInfo	(	IN HANDLE	hMailslot,
		IN LPDWORD	lpMaxMessageSize,
		IN LPDWORD	lpNextSize,
		IN LPDWORD	lpMessageCount,
		IN LPDWORD	lpReadTimeout
	)

Definition at line 117 of file mailslot.c.

{
    FILE_MAILSLOT_QUERY_INFORMATION Buffer;
    IO_STATUS_BLOCK Iosb;
    NTSTATUS Status;
    LARGE_INTEGER Timeout;

    Status = NtQueryInformationFile(hMailslot,
                                    &Iosb,
                                    &Buffer,
                                    sizeof(FILE_MAILSLOT_QUERY_INFORMATION),
                                    FileMailslotQueryInformation);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("NtQueryInformationFile failed (Status %x)!\n", Status);
        BaseSetLastNTError(Status);
        return FALSE;
     }

     if (lpMaxMessageSize) *lpMaxMessageSize = Buffer.MaximumMessageSize;
     if (lpNextSize) *lpNextSize = Buffer.NextMessageSize;
     if (lpMessageCount) *lpMessageCount = Buffer.MessagesAvailable;

     if (lpReadTimeout)
     {
         if (Buffer.ReadTimeout.QuadPart == 0xFFFFFFFFFFFFFFFFLL)
         {
             *lpReadTimeout = MAILSLOT_WAIT_FOREVER;
         }
         else
         {
             Timeout.QuadPart = -Buffer.ReadTimeout.QuadPart;
             Timeout = RtlExtendedLargeIntegerDivide(Timeout, 10000, NULL);
             if (Timeout.HighPart == 0)
             {
                 *lpReadTimeout = Timeout.LowPart;
             }
             else
             {
                 *lpReadTimeout = 0xFFFFFFFE;
             }
         }
     }

   return TRUE;
}

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