BioImager.FileUtil Class Reference

Static Public Member Functions
static List< Process >	Locking (string path)

Detailed Description

Definition at line 214 of file Win32.cs.

Member Function Documentation

Locking()

static List< Process > BioImager.FileUtil.Locking ( string path )

static

Definition at line 277 of file Win32.cs.

        {
            uint handle;
            string key = Guid.NewGuid().ToString();
            List<Process> processes = new List<Process>();
 
            int res = RmStartSession(out handle, 0, key);
 
            if (res != 0)
                throw new Exception("Could not begin restart session. Unable to determine file locker.");
 
            try
            {
                const int ERROR_MORE_DATA = 234;
                uint pnProcInfoNeeded = 0,
                     pnProcInfo = 0,
                     lpdwRebootReasons = RmRebootReasonNone;
 
                string[] resources = new string[] { path }; // Just checking on one resource.
 
                res = RmRegisterResources(handle, (uint)resources.Length, resources, 0, null, 0, null);
 
                if (res != 0)
                    throw new Exception("Could not register resource.");
 
                //Note: there's a race condition here -- the first call to RmGetList() returns
                //      the total number of process. However, when we call RmGetList() again to get
                //      the actual processes this number may have increased.
                res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, null, ref lpdwRebootReasons);
 
                if (res == ERROR_MORE_DATA)
                {
                    // Create an array to store the process results
                    RM_PROCESS_INFO[] processInfo = new RM_PROCESS_INFO[pnProcInfoNeeded];
                    pnProcInfo = pnProcInfoNeeded;
 
                    // Get the list
                    res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, processInfo, ref lpdwRebootReasons);
 
                    if (res == 0)
                    {
                        processes = new List<Process>((int)pnProcInfo);
 
                        // Enumerate all of the results and add them to the 
                        // list to be returned
                        for (int i = 0; i < pnProcInfo; i++)
                        {
                            try
                            {
                                processes.Add(Process.GetProcessById(processInfo[i].Process.dwProcessId));
                            }
                            // catch the error -- in case the process is no longer running
                            catch (ArgumentException) { }
                        }
                    }
                    else
                        throw new Exception("Could not list processes locking resource.");
                }
                else if (res != 0)
                    throw new Exception("Could not list processes locking resource. Failed to get size of result.");
            }
            finally
            {
                RmEndSession(handle);
            }
 
            return processes;
        }

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The documentation for this class was generated from the following file:

• BioImager/Source/Win32.cs