Classification: Public
There was code from NetFxChainer.cpp (CreateNetFxChainer):
hr = StrAllocFormatted(&sczName, L"%ls_mutex", wzEventName);
ExitOnFailure(hr, "failed to allocate memory for mutex name");
// Create the mutex, we initially own
pChainer->hMutex = ::CreateMutex(NULL, TRUE, sczName);
so I was trying that...
it seems nothing is working... I have a MSI running and installing, another MSI
pops up an error message that another MSI is running but my code isn't working,
it isn't getting ERROR_ALREADY_EXISTS
steve
-----Original Message-----
From: Phil Wilson [mailto:phildgwil...@gmail.com]
Sent: January-27-15 1:25 PM
To: General discussion about the WiX toolset.
Subject: Re: [WiX-users] seeing if a MSI is running using mutex...
I'll put it this way: I don't understand why you're not passing the string
LPCWSTR sczMutexName = L"Global\\_MSIExecute"; into CreateMutex(). Why the
StrAllocFormatted call?
Also it's only locked during the execute sequence, and I don't know how you're
testing it.
---------------
Phil Wilson
On Tue, Jan 27, 2015 at 10:08 AM, StevenOgilvie <sogil...@msn.com> wrote:
> What is the actual MSI mutex?
>
> Thanks
>
> Steve
>
> From: Phil Wilson [via Windows Installer XML (WiX) toolset]
> Sent: Tuesday, January 27, 2015 12:59
> To: StevenOgilvie
> Subject: Re: seeing if a MSI is running using mutex...
>
>
>
>
> It appears that your CreateMutex isn't passing in the actual MSI mutex
> in sczMutexName .
> ---------------
> Phil Wilson
>
>
> On Tue, Jan 27, 2015 at 7:51 AM, StevenOgilvie <sogil...@msn.com> wrote:
>> Hi all,
>>
>> Trying to create a method to detect if ANY MSI is running and if so
>> halt bootstrapper...
>> I am doing this in C++
>>
>> I get a successful mutex, but it always returns ERROR_SUCCESS, what
>> am I doing wrong?
>> thanks
>> Steve
>>
>>
>> HANDLE ghMutex = NULL;
>> LPCWSTR sczVerifyMSIRunningVariableSet = L"0"; LPWSTR
>> sczVerifyMSIRunningVariable = NULL; LPWSTR
>> sczUnformattedVerifyMSIRunningVariable = NULL; LPCWSTR sczMutexName =
>> L"Global\\_MSIExecute"; LPWSTR sczName = NULL; BOOL MutexExist =
>> FALSE;
>>
>> // get the bootstrapper variable to change hr =
>> BalGetStringVariable(WIXSTDBA_VARIABLE_IS_ANOTHER_MSI_RUNNING,
>> &sczUnformattedVerifyMSIRunningVariable);
>> BalExitOnFailure1(hr, "Failed to get MSI running variable:
>> %ls", WIXSTDBA_VARIABLE_IS_ANOTHER_MSI_RUNNING);
>> hr = BalFormatString(sczUnformattedVerifyMSIRunningVariable,
>> &sczVerifyMSIRunningVariable);
>> BalExitOnFailure1(hr, "Failed to format get MSI running variable:
>> %ls", sczUnformattedVerifyMSIRunningVariable);
>> hr = StrAllocFormatted(&sczName, L"%ls", sczMutexName);
>> ::MessageBoxW(m_hWnd, (LPCWSTR)sczName,
>> (LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
>>
>> // check to see if any MSI is running
>> ghMutex = ::CreateMutex(
>> NULL, // default security attributes
>> FALSE, // initially not owned
>> sczName); // product name
>>
>> if (ghMutex != NULL)
>> {
>> ::MessageBoxW(m_hWnd, L"ghMutex was not null",
>> (LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
>>
>> switch (GetLastError())
>> {
>> case ERROR_SUCCESS:
>> // Mutex created successfully. There is no
>> instance running
>> ::MessageBoxW(m_hWnd, L"ghMutex: Mutex created
>> successfully. There is no instance running FALSE",
>> (LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
>> MutexExist = FALSE;
>> break;
>> case ERROR_ALREADY_EXISTS:
>> // Mutex already exists so there is a running instance
>> ::MessageBoxW(m_hWnd, L"ghMutex: Mutex already
>> exists so there is a running instance TRUE",
>> (LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
>> MutexExist = TRUE;
>> break;
>> default:
>> // Failed to create Mutex by unknown reason
>> ::MessageBoxW(m_hWnd, L"ghMutex: Failed to create
>> Mutex by unknown reason FALSE", (LPCWSTR)m_pTheme->sczCaption, MB_OK
>> | MB_ICONWARNING);
>> MutexExist = FALSE;
>> break;
>> }
>> }
>>
>> if (MutexExist)
>> {
>> sczVerifyMSIRunningVariableSet = L"1";
>> }
>>
>> // a MSI is installing
>> hr =
>> m_pEngine->SetVariableString(LPCWSTR(sczVerifyMSIRunningVariable),
>> sczVerifyMSIRunningVariableSet);
>>
>>
>>
This message has been marked as Public by Steven Ogilvie on January-27-15
1:56:22 PM.
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