1002 lines
20 KiB
C++
1002 lines
20 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1990 - 1999
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//
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// File: threads.cxx
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//
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//--------------------------------------------------------------------------
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/* --------------------------------------------------------------------
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Microsoft OS/2 LAN Manager
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Copyright(c) Microsoft Corp., 1990
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-------------------------------------------------------------------- */
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/* --------------------------------------------------------------------
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File: threads.cxx
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Description:
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This file provides a system independent threads package for use on the
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NT operating system.
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History:
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5/24/90 [mikemon] File created.
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Kamen Moutafov (KamenM) Dec 99 - Feb 2000 - Support for cell debugging stuff
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-------------------------------------------------------------------- */
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#include <precomp.hxx>
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#include <rpcuuid.hxx>
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#include <binding.hxx>
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#include <handle.hxx>
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#include <hndlsvr.hxx>
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#include <lpcpack.hxx>
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#include <lpcsvr.hxx>
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#include <ProtBind.hxx>
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#include <lpcclnt.hxx>
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unsigned long DefaultThreadStackSize = 0;
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void
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PauseExecution (
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unsigned long milliseconds
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)
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{
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Sleep(milliseconds);
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}
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DLL::DLL (
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IN RPC_CHAR * DllName,
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OUT RPC_STATUS * Status
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)
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/*++
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Routine Description:
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We will load a dll and create an object to represent it.
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Arguments:
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DllName - Supplies the name of the dll to be loaded.
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Status - Returns the status of the operation. This will only be set
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if an error occurs. The possible error values are as follows.
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RPC_S_OUT_OF_MEMORY - Insufficient memory is available to load
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the dll.
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RPC_S_INVALID_ARG - The requested dll can not be found.
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--*/
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{
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DWORD dwLastError;
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if (RpcpStringCompare(DllName, RPC_T("rpcrt4.dll")) == 0)
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{
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DllHandle = 0;
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return;
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}
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DllHandle = (void *)LoadLibrary((const RPC_SCHAR *)DllName);
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if ( DllHandle == 0 )
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{
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dwLastError = GetLastError();
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if ( (dwLastError == ERROR_NOT_ENOUGH_MEMORY)
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|| (dwLastError == ERROR_COMMITMENT_LIMIT) )
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{
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*Status = RPC_S_OUT_OF_MEMORY;
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}
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else
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{
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*Status = RPC_S_INVALID_ARG;
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}
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}
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}
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DLL::~DLL (
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)
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/*++
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Routine Description:
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We just need to free the library, but only if was actually loaded.
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--*/
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{
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if ( DllHandle != 0 )
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{
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BOOL Status = FreeLibrary((HMODULE)DllHandle);
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ASSERT( Status );
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}
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}
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extern HANDLE GetCompletionPortHandleForThread(void);
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extern void ReleaseCompletionPortHandleForThread(HANDLE h);
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void *
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DLL::GetEntryPoint (
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IN char * Procedure
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)
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/*++
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Routine Description:
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We obtain the entry point for a specified procedure from this dll.
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Arguments:
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Procedure - Supplies the name of the entry point.
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Return Value:
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A pointer to the requested procedure will be returned if it can be
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found; otherwise, zero will be returned.
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--*/
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{
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FARPROC ProcedurePointer;
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if (DllHandle == 0)
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{
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if (strcmp(Procedure, "TransportLoad") == 0)
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return (PVOID)TransportLoad;
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else if (strcmp(Procedure, "GetCompletionPortHandleForThread") == 0)
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return (PVOID)GetCompletionPortHandleForThread;
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else if (strcmp(Procedure, "ReleaseCompletionPortHandleForThread") == 0)
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return (PVOID) ReleaseCompletionPortHandleForThread;
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ASSERT(0);
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return NULL;
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}
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ProcedurePointer = GetProcAddress((HINSTANCE)DllHandle, (LPSTR) Procedure);
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if ( ProcedurePointer == 0 )
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{
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ASSERT( GetLastError() == ERROR_PROC_NOT_FOUND );
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}
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return(ProcedurePointer);
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}
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unsigned long
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CurrentTimeSeconds (
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void
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)
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// Return the current time in seconds. When this time is counted
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// from is not particularly important since it is used as a delta.
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{
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return(GetTickCount()*1000L);
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}
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RPC_STATUS
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SetThreadStackSize (
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IN unsigned long ThreadStackSize
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)
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/*++
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Routine Description:
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We want to set the default thread stack size.
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Arguments:
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ThreadStackSize - Supplies the required thread stack size in bytes.
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Return Value:
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RPC_S_OK - We will always return this, because this routine always
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succeeds.
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--*/
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{
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if (DefaultThreadStackSize < ThreadStackSize)
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DefaultThreadStackSize = ThreadStackSize;
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return(RPC_S_OK);
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}
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long
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ThreadGetRpcCancelTimeout (
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)
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{
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THREAD * ThreadInfo = RpcpGetThreadPointer();
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ASSERT(ThreadInfo);
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return (ThreadInfo->CancelTimeout);
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}
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RPC_STATUS
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ThreadStartRoutine (
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IN THREAD * Thread
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)
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{
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RpcpSetThreadPointer(Thread);
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Thread->StartRoutine();
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return 0;
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}
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THREAD *
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ThreadSelfHelper (
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)
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{
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THREAD * Thread;
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RPC_STATUS Status = RPC_S_OK;
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Thread = new THREAD(&Status);
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if (Thread == 0)
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{
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return 0;
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}
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if (Status != RPC_S_OK)
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{
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delete Thread;
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return 0;
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}
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return Thread;
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}
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RPC_STATUS RPC_ENTRY
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RpcMgmtSetCancelTimeout(
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long Timeout
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)
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/*++
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Routine Description:
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An application will use this routine to set the cancel
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timeout for a thread.
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Arguments:
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Timeout - Supplies the cancel timeout value to set in the thread.
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0 = No cancel timeout
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n = seconds
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RPC_C_CANCEL_INFINITE_TIMEOUT = Infinite
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Return Value:
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RPC_S_OK - The operation completed successfully.
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RPC_S_INVALID_TIMEOUT - The specified timeout value is invalid.
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--*/
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{
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InitializeIfNecessary();
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THREAD *Thread = ThreadSelf() ;
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if (!Thread)
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{
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return RPC_S_OUT_OF_MEMORY;
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}
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return Thread->SetCancelTimeout(Timeout);
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}
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RPC_STATUS
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RegisterForCancels(
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CALL * Call
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)
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{
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THREAD * ThreadInfo = ThreadSelf();
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if (ThreadInfo == 0)
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{
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return RPC_S_OUT_OF_MEMORY;
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}
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return ThreadInfo->RegisterForCancels(Call);
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}
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RPC_STATUS
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UnregisterForCancels(
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)
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{
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THREAD *ThreadInfo = RpcpGetThreadPointer();
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ASSERT(ThreadInfo);
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ThreadInfo->UnregisterForCancels ();
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return RPC_S_OK;
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}
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RPC_STATUS RPC_ENTRY
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RpcCancelThread(
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IN void * ThreadHandle
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)
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{
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if (!QueueUserAPC(CancelAPCRoutine, ThreadHandle, 0))
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{
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return RPC_S_ACCESS_DENIED;
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}
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return RPC_S_OK;
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}
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RPC_STATUS RPC_ENTRY
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RpcCancelThreadEx (
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IN void *ThreadHandle,
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IN long Timeout
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)
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{
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if (!QueueUserAPC(CancelExAPCRoutine, ThreadHandle, (UINT_PTR) Timeout))
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{
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return RPC_S_ACCESS_DENIED;
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}
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return RPC_S_OK;
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}
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RPC_STATUS RPC_ENTRY
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RpcServerTestCancel (
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IN RPC_BINDING_HANDLE BindingHandle OPTIONAL
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)
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/*++
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Function Name:RpcServerTestCancel
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Parameters:
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BindingHandle - This is the SCALL on which the server is trying to test for cancels.
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Description:
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New API used by a server to check if a call has been cancelled.
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If BindingHandle is NULL, the test is perfomed on the dispatched call
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on the thread on which it is called. Async servers need to call
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RpcServerTestCancel(RpcAsyncGetCallHandle(pAsync))
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Returns:
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RPC_S_OK: The call was cancelled
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RPC_S_CALL_IN_PROGRESS: The call was not cancelled
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RPC_S_INVALID_BINDING: The handle is invalid
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RPC_S_NO_CALL_ACTIVE: No call is active on this thread
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--*/
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{
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CALL *Call;
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if (BindingHandle == 0)
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{
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Call = (CALL *) RpcpGetThreadContext();
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if (Call == 0)
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{
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#if DBG
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PrintToDebugger("RPC: RpcServerTestCancel: no call active\n");
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#endif
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return RPC_S_NO_CALL_ACTIVE;
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}
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}
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else
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{
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Call = (CALL *) BindingHandle;
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if (Call->InvalidHandle(SCALL_TYPE))
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{
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#if DBG
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PrintToDebugger("RPC: RpcServerTestCancel: bad handle\n");
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#endif
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return RPC_S_INVALID_BINDING;
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}
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}
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if (Call->TestCancel())
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{
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return RPC_S_OK;
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}
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return RPC_S_CALL_IN_PROGRESS;
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}
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RPC_STATUS RPC_ENTRY
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RpcTestCancel(
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)
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/*++
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Function Name:RpcTestCancel
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Parameters:
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Description:
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This function is here only for backward compatibility. The new API to test
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for cancels is RpcServerTestCancel.
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Returns:
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--*/
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{
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return RpcServerTestCancel(0);
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}
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void RPC_ENTRY
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RpcServerYield ()
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{
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THREAD * ThreadInfo = RpcpGetThreadPointer();
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ASSERT(ThreadInfo);
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if (ThreadInfo)
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{
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ThreadInfo->YieldThread();
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}
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}
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THREAD::THREAD (
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IN THREAD_PROC Procedure,
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IN void * Parameter,
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OUT RPC_STATUS * Status
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#ifdef RPC_OLD_IO_PROTECTION
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) : ProtectCount(1), ReleaseCount(0),
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#else
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) :
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#endif
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ThreadEvent(Status)
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/*++
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Routine Description:
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We construct a thread in this method. It is a little bit weird, because
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we need to be able to clean things up if we cant create the thread.
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Arguments:
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Procedure - Supplies the procedure which the new thread should execute.
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Parameter - Supplies a parameter to be passed to the procedure.
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RpcStatus - Returns the status of the operation. This will be set to
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RPC_S_OUT_OF_THREADS if we can not create a new thread.
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--*/
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{
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unsigned long ThreadIdentifier;
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HANDLE ImpersonationToken, NewToken = 0;
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NTSTATUS NtStatus;
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CommonConstructor();
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SavedProcedure = Procedure;
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SavedParameter = Parameter;
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HandleToThread = 0;
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if (*Status != RPC_S_OK)
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{
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return;
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}
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if (IsServerSideDebugInfoEnabled())
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{
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DebugCell = (DebugThreadInfo *) AllocateCell(&DebugCellTag);
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if (DebugCell == NULL)
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{
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*Status = RPC_S_OUT_OF_MEMORY;
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return;
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}
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else
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{
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DebugCell->TypeHeader = 0;
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DebugCell->Type = dctThreadInfo;
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DebugCell->Status = dtsAllocated;
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}
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}
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//
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// If there is a token on the calling thread, null it out
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//
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if (OpenThreadToken (GetCurrentThread(),
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TOKEN_IMPERSONATE | TOKEN_QUERY,
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TRUE,
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&ImpersonationToken) == FALSE)
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{
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if ( GetLastError() == ERROR_NO_TOKEN )
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{
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ImpersonationToken = 0 ;
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}
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else
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{
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//
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// More interesting. There may be a token, and
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// we can't open it. Note that the anonymous token can't be opened
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// this way. Complain:
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//
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#if DBG
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PrintToDebugger( "RPC : OpenThreadToken returned %d\n", GetLastError() );
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#endif
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ASSERT(0);
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*Status = RPC_S_ACCESS_DENIED;
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return;
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}
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}
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else
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{
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NtStatus = NtSetInformationThread(NtCurrentThread(),
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ThreadImpersonationToken,
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&NewToken,
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sizeof(HANDLE));
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if (!NT_SUCCESS(NtStatus))
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{
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*Status = RPC_S_ACCESS_DENIED;
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#if DBG
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PrintToDebugger("RPC : NtSetInformationThread : %lx\n", NtStatus);
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#endif
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ASSERT(0);
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CloseHandle(ImpersonationToken);
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return;
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}
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}
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HandleToThread = CreateThread(0, DefaultThreadStackSize,
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(LPTHREAD_START_ROUTINE) ThreadStartRoutine,
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this, 0, &ThreadIdentifier);
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if ( HandleToThread == 0 )
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{
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*Status = RPC_S_OUT_OF_THREADS;
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}
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if (ImpersonationToken)
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{
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//
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// If there was a token, restore it.
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//
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NtStatus = NtSetInformationThread(NtCurrentThread(),
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ThreadImpersonationToken,
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&ImpersonationToken,
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sizeof(HANDLE));
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#if DBG
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if (!NT_SUCCESS(NtStatus))
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{
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PrintToDebugger("RPC : NtSetInformationThread : %lx\n", NtStatus);
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}
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#endif // DBG
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CloseHandle(ImpersonationToken);
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}
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}
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THREAD::THREAD (
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OUT RPC_STATUS * Status
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#ifdef RPC_OLD_IO_PROTECTION
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) : ProtectCount(1), ReleaseCount(0),
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#else
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) :
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#endif
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ThreadEvent(Status)
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/*++
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Routine Description:
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This overloaded constructor is called only by the main app thread.
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this is needed because in WMSG we will be dispatching in the
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context of main app thread.
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Arguments:
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RpcStatus - Returns the status of the operation
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--*/
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{
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HANDLE hProcess ;
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CommonConstructor();
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SavedProcedure = 0;
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SavedParameter = 0;
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HandleToThread = 0;
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if (*Status != RPC_S_OK)
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{
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return;
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}
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hProcess = GetCurrentProcess() ;
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if (!DuplicateHandle(hProcess,
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GetCurrentThread(),
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hProcess,
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&HandleToThread,
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0,
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FALSE,
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DUPLICATE_SAME_ACCESS))
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{
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*Status = RPC_S_OUT_OF_MEMORY ;
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return;
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}
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RpcpSetThreadPointer(this);
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*Status = RPC_S_OK ;
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}
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|
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void
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THREAD::CommonConstructor (
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)
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/*++
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||
Function Name:CommonConstructor
|
||
|
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Parameters:
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|
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Description:
|
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Returns:
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--*/
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{
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CancelTimeout = RPC_C_CANCEL_INFINITE_TIMEOUT;
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Context = 0;
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SecurityContext = 0;
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ClearCallCancelledFlag();
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fAsync = FALSE;
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ExtendedStatus = RPC_S_OK;
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DebugCell = NULL;
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ThreadEEInfo = NULL;
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NDRSlot = NULL;
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CachedLrpcCall = NULL;
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LastSuccessfullyDestroyedContext = NULL;
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CachedWaiterPtr = NULL;
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CachedEEInfoBlock = NULL;
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ParametersOfCachedEEInfo = 0;
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ActiveCall = 0;
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|
||
for (int i = 0; i < 4; i++)
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{
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BufferCache[i].pList = 0;
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BufferCache[i].cBlocks = 0;
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}
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#ifdef CHECK_MUTEX_INVERSION
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ConnectionMutexHeld = 0;
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#endif
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}
|
||
|
||
THREAD::~THREAD (
|
||
)
|
||
{
|
||
ASSERT (0 == SecurityContext);
|
||
#ifdef RPC_OLD_IO_PROTECTION
|
||
ASSERT(ProtectCount == ReleaseCount.GetInteger());
|
||
#endif
|
||
|
||
if (CachedWaiterPtr && (CachedWaiterPtr != &CachedWaiter))
|
||
SWMRLock::FreeWaiterCache(&CachedWaiterPtr);
|
||
|
||
if (DebugCell != NULL)
|
||
{
|
||
FreeCell(DebugCell, &DebugCellTag);
|
||
}
|
||
|
||
if ( HandleToThread != 0 )
|
||
{
|
||
CloseHandle(HandleToThread);
|
||
}
|
||
|
||
if (CachedLrpcCall)
|
||
{
|
||
delete CachedLrpcCall;
|
||
}
|
||
|
||
if (ThreadEEInfo)
|
||
PurgeEEInfo();
|
||
|
||
if (CachedEEInfoBlock)
|
||
FreeEEInfoRecordShallow(CachedEEInfoBlock);
|
||
|
||
gBufferCache->ThreadDetach(this);
|
||
}
|
||
|
||
void *
|
||
THREAD::ThreadHandle (
|
||
)
|
||
/*++
|
||
Function Name:ThreadHandle
|
||
|
||
Parameters:
|
||
|
||
Description:
|
||
|
||
Returns:
|
||
|
||
--*/
|
||
{
|
||
while ( HandleToThread == 0 )
|
||
{
|
||
PauseExecution(100L);
|
||
}
|
||
|
||
return(HandleToThread);
|
||
}
|
||
|
||
RPC_STATUS
|
||
THREAD::SetCancelTimeout (
|
||
IN long Timeout
|
||
)
|
||
/*++
|
||
Function Name:SetCancelTimeout
|
||
|
||
Parameters:
|
||
|
||
Description:
|
||
|
||
Returns:
|
||
|
||
--*/
|
||
{
|
||
|
||
CancelTimeout = Timeout;
|
||
|
||
return RPC_S_OK;
|
||
}
|
||
|
||
|
||
void
|
||
SetExtendedError (
|
||
IN RPC_STATUS Status
|
||
)
|
||
{
|
||
THREAD *pThread = ThreadSelf();
|
||
|
||
if (pThread == 0)
|
||
{
|
||
return;
|
||
}
|
||
|
||
pThread->SetExtendedError(Status);
|
||
}
|
||
|
||
|
||
RPC_STATUS
|
||
I_RpcGetExtendedError (
|
||
)
|
||
{
|
||
THREAD *pThread = ThreadSelf();
|
||
|
||
if (pThread == 0)
|
||
{
|
||
return RPC_S_OUT_OF_MEMORY;
|
||
}
|
||
|
||
return pThread->GetExtendedError();
|
||
}
|
||
|
||
|
||
HANDLE RPC_ENTRY
|
||
I_RpcTransGetThreadEvent(
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Returns the receive event specific to this thread.
|
||
|
||
Arguments:
|
||
|
||
None
|
||
|
||
Return Value:
|
||
|
||
Returns the send event. This function will not fail
|
||
--*/
|
||
{
|
||
THREAD *pThis = RpcpGetThreadPointer();
|
||
|
||
ASSERT(pThis);
|
||
ASSERT(pThis->ThreadEvent.EventHandle);
|
||
|
||
return(pThis->ThreadEvent.EventHandle);
|
||
}
|
||
|
||
|
||
RPC_STATUS
|
||
THREAD::CancelCall (
|
||
IN BOOL fTimeoutValid,
|
||
IN long Timeout
|
||
)
|
||
{
|
||
RPC_STATUS Status;
|
||
|
||
if (fTimeoutValid)
|
||
{
|
||
CancelTimeout = Timeout;
|
||
}
|
||
|
||
SetCallCancelledFlag();
|
||
if (ActiveCall)
|
||
{
|
||
Status = ActiveCall->Cancel(HandleToThread);
|
||
}
|
||
else
|
||
{
|
||
Status = RPC_S_NO_CALL_ACTIVE;
|
||
}
|
||
|
||
return Status;
|
||
}
|
||
|
||
|
||
RPC_STATUS
|
||
THREAD::RegisterForCancels (
|
||
IN CALL *Call
|
||
)
|
||
{
|
||
Call->NestingCall = ActiveCall;
|
||
ActiveCall = Call;
|
||
|
||
return RPC_S_OK;
|
||
}
|
||
|
||
|
||
void
|
||
THREAD::UnregisterForCancels (
|
||
)
|
||
{
|
||
if (ActiveCall)
|
||
{
|
||
ActiveCall = ActiveCall->NestingCall;
|
||
}
|
||
|
||
//
|
||
// Need to think about when we should cancel the next call if ActiveCall != 0
|
||
//
|
||
}
|
||
|
||
void
|
||
THREAD::PurgeEEInfo (
|
||
void
|
||
)
|
||
{
|
||
ASSERT(ThreadEEInfo != NULL);
|
||
FreeEEInfoChain(ThreadEEInfo);
|
||
ThreadEEInfo = NULL;
|
||
}
|
||
|
||
VOID RPC_ENTRY
|
||
CancelAPCRoutine (
|
||
IN ULONG_PTR Timeout
|
||
)
|
||
{
|
||
RPC_STATUS Status;
|
||
THREAD *Thread = ThreadSelf() ;
|
||
|
||
if (Thread == 0)
|
||
{
|
||
return;
|
||
}
|
||
|
||
Status = Thread->CancelCall();
|
||
#if DBG
|
||
if (Status != RPC_S_OK)
|
||
{
|
||
PrintToDebugger("RPC: CancelCall failed %d\n", Status);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
void
|
||
THREAD::GetWaiterCache (
|
||
OUT SWMRWaiter **WaiterCache,
|
||
IN SCALL *SCall,
|
||
IN SWMRWaiterType WaiterType
|
||
)
|
||
{
|
||
ASSERT(WaiterCache != NULL);
|
||
|
||
if (CachedWaiterPtr)
|
||
{
|
||
LogEvent(SU_THREAD, EV_POP, CachedWaiterPtr->hEvent, CachedWaiterPtr, 0, 1, 1);
|
||
// if we have something in the cache, we may as well use it
|
||
*WaiterCache = CachedWaiterPtr;
|
||
CachedWaiterPtr = NULL;
|
||
}
|
||
else if ((WaiterType == swmrwtWriter) && SCall->IsSyncCall())
|
||
{
|
||
// the cache is empty, but this is exclusive, sync usage, so we can
|
||
// borrow the thread event and cook up a waiter
|
||
SWMRWaiter::CookupWaiterFromEventAndBuffer(&CachedWaiter, WaiterType, ThreadEvent.EventHandle);
|
||
*WaiterCache = &CachedWaiter;
|
||
}
|
||
else
|
||
{
|
||
// the cache is empty and this is either shared or async usage so we can't
|
||
// use the thread buffer/event.
|
||
*WaiterCache = NULL;
|
||
}
|
||
}
|
||
|
||
void
|
||
THREAD::FreeWaiterCache (
|
||
IN OUT SWMRWaiter **WaiterCache
|
||
)
|
||
{
|
||
ASSERT(WaiterCache != NULL);
|
||
|
||
// if we got something in the cache and this is not a cooked up item
|
||
if (*WaiterCache && (*WaiterCache != &CachedWaiter))
|
||
{
|
||
if (CachedWaiterPtr)
|
||
{
|
||
// if our cache is already full, just free the new waiter
|
||
SWMRLock::FreeWaiterCache(WaiterCache);
|
||
}
|
||
else
|
||
{
|
||
// store it
|
||
CachedWaiterPtr = *WaiterCache;
|
||
LogEvent(SU_THREAD, EV_PUSH, CachedWaiterPtr->hEvent, CachedWaiterPtr, 0, 1, 1);
|
||
*WaiterCache = NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
VOID RPC_ENTRY
|
||
CancelExAPCRoutine (
|
||
IN ULONG_PTR Timeout
|
||
)
|
||
{
|
||
RPC_STATUS Status;
|
||
THREAD *Thread = ThreadSelf() ;
|
||
|
||
if (Thread == 0)
|
||
{
|
||
return;
|
||
}
|
||
|
||
Status = Thread->CancelCall(TRUE, (long) Timeout);
|
||
#if DBG
|
||
if (Status != RPC_S_OK)
|
||
{
|
||
PrintToDebugger("RPC: CancelCall failed %d\n", Status);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
|
||
void
|
||
RpcpRaiseException (
|
||
IN RPC_STATUS exception
|
||
)
|
||
{
|
||
if ( exception == STATUS_ACCESS_VIOLATION )
|
||
{
|
||
exception = ERROR_NOACCESS;
|
||
}
|
||
|
||
RaiseException(exception,
|
||
EXCEPTION_NONCONTINUABLE,
|
||
0,
|
||
0);
|
||
|
||
ASSERT(0);
|
||
}
|
||
|
||
|
||
|
||
void RPC_ENTRY
|
||
RpcRaiseException (
|
||
IN RPC_STATUS exception
|
||
)
|
||
{
|
||
NukeStaleEEInfoIfNecessary(exception);
|
||
RpcpRaiseException(exception);
|
||
}
|
||
|
||
|