atomically increment the pipe id to be thread-safe. Thanks to Mark Grosberg for reporting it.

reactos/lib/kernel32/file

diff -u -r1.10 -r1.11
--- pipe.c	23 Jan 2004 21:16:03 -0000	1.10
+++ pipe.c	8 Oct 2004 21:48:46 -0000	1.11
@@ -1,4 +1,4 @@

-/* $Id: pipe.c,v 1.10 2004/01/23 21:16:03 ekohl Exp $

+/* $Id: pipe.c,v 1.11 2004/10/08 21:48:46 weiden Exp $

  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS system libraries

@@ -37,15 +37,16 @@

    NTSTATUS Status;
    HANDLE ReadPipeHandle;
    HANDLE WritePipeHandle;

+   ULONG PipeId;

    PSECURITY_DESCRIPTOR SecurityDescriptor = NULL;
 
    DefaultTimeout.QuadPart = 300000000; /* 30 seconds */
 

-   ProcessPipeId++;

+   PipeId = (ULONG)InterlockedIncrement((LONG*)&ProcessPipeId);

    swprintf(Buffer,
 	    L"\\Device\\NamedPipe\\Win32Pipes.%08x.%08x",
 	    NtCurrentTeb()->Cid.UniqueProcess,

-	    ProcessPipeId);

+	    PipeId);

    RtlInitUnicodeString (&PipeName,
 			 Buffer);