private static Task <BuildResponse> RunServerCompilationCore(
RequestLanguage language,
List <string> arguments,
BuildPaths buildPaths,
string pipeName,
string keepAlive,
string libEnvVariable,
Func <string, string, bool> tryCreateServerFunc,
CancellationToken cancellationToken)
{
var clientDir = buildPaths.ClientDirectory;
var clientMutexName = BuildProtocolConstants.GetClientMutexName(pipeName);
bool holdsMutex;
using (var clientMutex = new Mutex(initiallyOwned: true,
name: clientMutexName,
createdNew: out holdsMutex))
{
try
{
if (!holdsMutex)
{
try
{
holdsMutex = clientMutex.WaitOne(TimeOutMsNewProcess);
if (!holdsMutex)
{
return(Task.FromResult <BuildResponse>(null));
}
}
catch (AbandonedMutexException)
{
holdsMutex = true;
}
}
// Check for an already running server
var serverMutexName = BuildProtocolConstants.GetServerMutexName(pipeName);
Mutex mutexIgnore;
bool wasServerRunning = Mutex.TryOpenExisting(serverMutexName, out mutexIgnore);
var timeout = wasServerRunning ? TimeOutMsExistingProcess : TimeOutMsNewProcess;
NamedPipeClientStream pipe = null;
if (wasServerRunning || tryCreateServerFunc(clientDir, pipeName))
{
pipe = TryConnectToServer(pipeName,
timeout,
cancellationToken);
}
if (pipe != null)
{
var request = BuildRequest.Create(language,
buildPaths.WorkingDirectory,
arguments,
keepAlive,
libEnvVariable);
return(TryCompile(pipe, request, cancellationToken));
}
}
finally
{
if (holdsMutex)
{
clientMutex.ReleaseMutex();
}
}
}
return(null);
}
