void Lock()
{
if (currentAppLock != null)
{
// lock already taken
return;
}
var lockFile = new FileInfo(Path.Combine(dataDir.FullName, AppPaths.LockFileRelativePath));
if (!lockFile.Exists)
{
try
{
lockFile.Create().Dispose();
}
catch (IOException)
{
// wait a moment to ensure file system is updated
Thread.Sleep(100);
lockFile.Refresh();
if (lockFile.Exists)
{
// ignore, something else created the lock file
}
else
{
throw;
}
}
}
currentAppLock = FileLock.EnterWait(lockFile.FullName, TimeSpan.FromSeconds(15));
}
public void WritesProcessInfo()
{
var lockFilePath = Path.Combine(TempDir.AbsolutePath, LockFileName);
File.Create(lockFilePath).Dispose();
FileLock = FileLock.EnterWait(lockFilePath, TimeSpan.Zero);
AssertHasProcessInfo(lockFilePath);
}
public void LocksAndReleases()
{
var lockFilePath = Path.Combine(TempDir.AbsolutePath, LockFileName);
File.Create(lockFilePath).Dispose();
AssertNoLock(lockFilePath);
FileLock = FileLock.EnterWait(lockFilePath, TimeSpan.Zero);
AssertLockFails(lockFilePath);
FileLock.Dispose();
AssertNoLock(lockFilePath);
}