CODEWITHSUNDEEP
windowswinapi
Paul
Paul

Reputation: 6911

Per-desktop mutex

I've just discovered Desktops, and I would like to improve support for it in my application.

I'm using a mutex to prevent multiple instances of the application from running, but I would like to allow to start additional instances if they are launched on a different desktop.

Is it possible to do with a mutex? As far as I know, there are only global and local (per-user) mutex, but no per-desktop mutexes.

Any ideas?

Upvotes: 0

Views: 108

Answers (1)

arx
arx

Reputation: 16904

Name the mutex

myCompanyName_myApplicationName_myApplicationVersion_desktopName

Applications running on different desktops will then be looking at different mutexes.

You can get the desktop name like this, though you might want to add some error checking:

wchar_t buffer[256];
DWORD length;

// This desktop handle does not need closing
HANDLE hDesktop = GetThreadDesktop(GetCurrentThreadId());
BOOL succeeded = GetUserObjectInformation(hDesktop, UOI_NAME, buffer, sizeof(buffer), &length);
// if succeeded then desktop name is in buffer

Upvotes: 1

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