/// <summary>
/// Copies file descriptors from another one to this one
/// </summary>
/// <param name="source">The source file descriptors</param>
private void copyFrom(FileDescriptors source)
{
Used = source.Used;
// Copy file descriptors
int cap = source.Capacity;
for (int i = 0; i < cap; i++)
{
Node sourceNode = source.GetNode(i);
if (sourceNode != null)
{
Nodes[i] = sourceNode.Clone();
Offsets[i] = source.GetOffset(i);
}
}
}
/// <summary>
/// Cleans up this task
/// </summary>
public void Cleanup()
{
// Cleanup child threads
Thread current = FirstThread;
while (current.NextThread != FirstThread)
{
current.Cleanup();
Heap.Free(current);
current = current.NextThread;
}
// Cleanup signals
for (int i = 0; i < Signals.NSIG; i++)
{
SignalAction action = m_signalActions[i];
if (action != null)
{
Heap.Free(action);
}
}
Heap.Free(m_signalActions);
// Cleanup virtual addresses claimed by this task
int count = m_usedAddresses.Count;
for (int i = 0; i < count; i++)
{
Heap.Free(m_usedAddresses.Item[i]);
}
m_usedAddresses.Dispose();
Heap.Free(m_usedAddresses);
// Filesystem stuff
FileDescriptors.Cleanup();
Heap.Free(FileDescriptors);
Heap.Free(m_currentDirectory);
// Context
Context.Cleanup();
Heap.Free(Context);
}
/// <summary>
/// Constructor of task
/// </summary>
/// <param name="priority">The priority of the task</param>
/// <param name="flags">The spawn flags</param>
public Task(TaskPriority priority, SpawnFlags flags)
{
PID = NextPID++;
FileDescriptors = new FileDescriptors();
Priority = priority;
TimeLeft = (int)priority;
// Check spawn flags
if ((flags & SpawnFlags.SWAP_PID) == SpawnFlags.SWAP_PID)
{
int old = PID;
PID = Tasking.CurrentTask.PID;
Tasking.CurrentTask.PID = old;
}
// Other data
GID = Tasking.CurrentTask.GID;
UID = Tasking.CurrentTask.UID;
m_launchTime = Time.FullTicks;
Name = "Nameless";
CMDLine = "";
// Signals
m_signalActions = new SignalAction[Signals.NSIG];
// Context
Context = new X86Context();
// Filesystem related initialization if we're not a kernel task
if ((flags & SpawnFlags.KERNEL_TASK) != SpawnFlags.KERNEL_TASK)
{
SetFileDescriptors(Tasking.CurrentTask.FileDescriptors.Clone());
CurrentDirectory = String.Clone(Tasking.CurrentTask.CurrentDirectory);
}
// List of addresses that need to be freed
m_usedAddresses = new List();
}
/// <summary>
/// Replaces the current file descriptors
/// </summary>
/// <param name="fileDescriptors">The new file descriptors</param>
public void SetFileDescriptors(FileDescriptors fileDescriptors)
{
FileDescriptors.Cleanup();
Heap.Free(FileDescriptors);
FileDescriptors = fileDescriptors;
}