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- Use the so-called SafeTerminateProcess() function to kill the child TiMidity++ process instead

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of signaling an event. I would have preferred to use GenerateConsoleCtrlEvent(), but since it
  requires the caller be attached to the same console as the process it wants to kill, it's
  pretty much worthless. We will continue to look for the presence of the event name in the
  TiMidity++ binary despite no longer using it, because standard TiMidity++ builds do not write
  to stdout in binary mode on Windows systems.

SVN r2980 (trunk)
This commit is contained in:
Randy Heit 2010-11-04 03:47:49 +00:00
parent ad200d8a56
commit 4a9892725d
2 changed files with 71 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
src/sound/i_musicinterns.h
View file

@ -202,7 +202,6 @@ protected:
#ifdef _WIN32
HANDLE ReadWavePipe;
HANDLE WriteWavePipe;
HANDLE KillerEvent;
HANDLE ChildProcess;
bool Validated;
bool ValidateTimidity();

89
src/sound/music_midi_timidity.cpp
View file

@ -20,8 +20,10 @@ void ChildSigHandler (int signum)
#endif
#ifdef _WIN32
const char TimidityPPMIDIDevice::EventName[] = "TiMidity Killer";
BOOL SafeTerminateProcess(HANDLE hProcess, UINT uExitCode);
static char TimidityTitle[] = "TiMidity (ZDoom Launched)";
const char TimidityPPMIDIDevice::EventName[] = "TiMidity Killer";
CVAR (String, timidity_exe, "timidity.exe", CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
#else
@ -71,7 +73,6 @@ TimidityPPMIDIDevice::TimidityPPMIDIDevice()
: DiskName("zmid"),
#ifdef _WIN32
ReadWavePipe(INVALID_HANDLE_VALUE), WriteWavePipe(INVALID_HANDLE_VALUE),
KillerEvent(INVALID_HANDLE_VALUE),
ChildProcess(INVALID_HANDLE_VALUE),
Validated(false)
#else
@ -108,11 +109,6 @@ TimidityPPMIDIDevice::~TimidityPPMIDIDevice ()
CloseHandle (ReadWavePipe);
ReadWavePipe = INVALID_HANDLE_VALUE;
}
if (KillerEvent != INVALID_HANDLE_VALUE)
{
CloseHandle (KillerEvent);
KillerEvent = INVALID_HANDLE_VALUE;
}
#else
if (WavePipe[1] != -1)
{
@ -186,12 +182,6 @@ int TimidityPPMIDIDevice::Open(void (*callback)(unsigned int, void *, DWORD, DWO
}
Validated = true;
KillerEvent = CreateEvent(NULL, FALSE, FALSE, EventName);
if (KillerEvent == INVALID_HANDLE_VALUE)
{
Printf(PRINT_BOLD, "Could not create TiMidity++ kill event.\n");
return 102;
}
#endif // WIN32
CommandLine.Format("%s %s -EFchorus=%s -EFreverb=%s -s%d ",
@ -398,11 +388,11 @@ bool TimidityPPMIDIDevice::LaunchTimidity ()
startup.wShowWindow = SW_SHOWMINNOACTIVE;
if (CreateProcess(NULL, CommandLine.LockBuffer(), NULL, NULL, TRUE,
/*HIGH_PRIORITY_CLASS|*/DETACHED_PROCESS, NULL, NULL, &startup, &procInfo))
DETACHED_PROCESS, NULL, NULL, &startup, &procInfo))
{
ChildProcess = procInfo.hProcess;
//SetThreadPriority (procInfo.hThread, THREAD_PRIORITY_HIGHEST);
CloseHandle (procInfo.hThread); // Don't care about the created thread
CloseHandle(procInfo.hThread); // Don't care about the created thread
CommandLine.UnlockBuffer();
return true;
}
@ -647,10 +637,8 @@ void TimidityPPMIDIDevice::Stop ()
#ifdef _WIN32
if (ChildProcess != INVALID_HANDLE_VALUE)
{
SetEvent(KillerEvent);
if (WaitForSingleObject(ChildProcess, 500) != WAIT_OBJECT_0)
if (!SafeTerminateProcess(ChildProcess, 666) && GetLastError() != ERROR_PROCESS_ABORTED)
{
ResetEvent(KillerEvent);
TerminateProcess(ChildProcess, 666);
}
CloseHandle(ChildProcess);
@ -670,3 +658,68 @@ void TimidityPPMIDIDevice::Stop ()
}
Started = false;
}
#ifdef _WIN32
/*
Safely terminate a process by creating a remote thread
in the process that calls ExitProcess
Source is a Dr Dobbs article circa 1999.
*/
typedef HANDLE (WINAPI *CreateRemoteThreadProto)(HANDLE,LPSECURITY_ATTRIBUTES,SIZE_T,LPTHREAD_START_ROUTINE,LPVOID,DWORD,LPDWORD);
BOOL SafeTerminateProcess(HANDLE hProcess, UINT uExitCode)
{
DWORD dwTID, dwCode;
HRESULT dwErr = 0;
HANDLE hRT = NULL;
HINSTANCE hKernel = GetModuleHandle("Kernel32");
BOOL bSuccess = FALSE;
// Detect the special case where the process is already dead...
if ( GetExitCodeProcess(hProcess, &dwCode) && (dwCode == STILL_ACTIVE) )
{
FARPROC pfnExitProc;
CreateRemoteThreadProto pfCreateRemoteThread;
pfnExitProc = GetProcAddress(hKernel, "ExitProcess");
// CreateRemoteThread does not exist on 9x systems.
pfCreateRemoteThread = (CreateRemoteThreadProto)GetProcAddress(hKernel, "CreateRemoteThread");
if (pfCreateRemoteThread == NULL)
{
dwErr = ERROR_INVALID_FUNCTION;
}
else
{
hRT = pfCreateRemoteThread(hProcess,
NULL,
0,
(LPTHREAD_START_ROUTINE)pfnExitProc,
(PVOID)(UINT_PTR)uExitCode, 0, &dwTID);
if ( hRT == NULL )
dwErr = GetLastError();
}
}
else
{
dwErr = ERROR_PROCESS_ABORTED;
}
if ( hRT )
{
// Must wait process to terminate to guarantee that it has exited...
WaitForSingleObject(hProcess, INFINITE);
CloseHandle(hRT);
bSuccess = TRUE;
}
if ( !bSuccess )
SetLastError(dwErr);
return bSuccess;
}
#endif