How do I create an inheritable Semaphore in .NET?
- by pauldoo
I am trying to create a Win32 Semaphore object which is inheritable. This means that any child processes I launch may automatically have the right to act on the same Win32 object.
My code currently looks as follows:
Semaphore semaphore = new Semaphore(0, 10);
Process process = Process.Start(pathToExecutable, arguments);
But the semaphore object in this code cannot be used by the child process.
The code I am writing is a port of come working C++. The old C++ code achieves this by the following:
SECURITY_ATTRIBUTES security = {0};
security.nLength = sizeof(security);
security.bInheritHandle = TRUE;
HANDLE semaphore = CreateSemaphore(&security, 0, LONG_MAX, NULL);
Then later when CreateProcess is called the bInheritHandles argument is set to TRUE.
(In both the C# and C++ case I am using the same child process (which is C++). It takes the semaphore ID on command line, and uses the value directly in a call to ReleaseSemaphore.)
I suspect I need to construct a special SemaphoreSecurity or ProcessStartInfo object, but I haven't figured it out yet.
