protected override int StartupInternal(int currentModelVersion)
{
CreateSettingsStores();
m_commitLogMutex = new GlobalMutex(MutexName);
bool createdNew;
using (m_commitLogMutex.InitializeAndLock(out createdNew))
{
CreateSharedMemory(createdNew);
using (MemoryMappedViewStream stream = m_commitLogMetadata.CreateViewStream())
{
CommitLogMetadata metadata = null;
if (!createdNew)
{
if (TryGetMetadata(stream, out metadata))
{
CheckExitedPeerProcesses(metadata);
if (m_peerProcesses.Count == 0)
{
createdNew = true;
}
}
else
{
createdNew = true;
}
}
if (createdNew)
{
metadata = new CommitLogMetadata();
}
using (Process curProcess = Process.GetCurrentProcess())
metadata.Peers[m_peerID] = new CommitLogPeer {
ProcessID = curProcess.Id, Generation = metadata.FileGeneration
};
if (metadata.Master == Guid.Empty)
{
base.LockProject();
metadata.Master = m_peerID;
}
int startupModelVersion = ReadInSurrogates(currentModelVersion);
// non-master peers cannot migrate the XML file
if (startupModelVersion < currentModelVersion && metadata.Master != m_peerID)
{
throw new LcmDataMigrationForbiddenException();
}
SaveMetadata(stream, metadata);
return(startupModelVersion);
}
}
}
public void InitializeAndLock_Reentrancy_DoesNotBlock()
{
using (var mutex = new GlobalMutex("test"))
{
using (mutex.InitializeAndLock())
{
using (mutex.Lock()) {}
}
}
}
public void InitializeAndLock_CreatedNew_ReturnsTrue()
{
using (var mutex = new GlobalMutex("test"))
{
mutex.Unlink();
bool createdNew;
using (mutex.InitializeAndLock(out createdNew)) {}
Assert.That(createdNew, Is.True);
}
}
public void InitializeAndLock_Existing_ReturnsFalse()
{
using (var mutex1 = new GlobalMutex("test"))
{
mutex1.Initialize();
using (var mutex2 = new GlobalMutex("test"))
{
bool createdNew;
using (mutex2.InitializeAndLock(out createdNew)) {}
Assert.That(createdNew, Is.False);
}
}
}
protected override void CreateInternal()
{
m_commitLogMutex = new GlobalMutex(MutexName);
using (m_commitLogMutex.InitializeAndLock())
{
CreateSharedMemory(true);
var metadata = new CommitLogMetadata {
Master = m_peerID
};
using (Process curProcess = Process.GetCurrentProcess())
metadata.Peers[m_peerID] = new CommitLogPeer {
ProcessID = curProcess.Id, Generation = metadata.FileGeneration
};
using (MemoryMappedViewStream stream = m_commitLogMetadata.CreateViewStream())
{
SaveMetadata(stream, metadata);
}
base.CreateInternal();
}
}
