/// <summary>
/// Signal that a memory action occurred within this handle's virtual regions.
/// </summary>
/// <param name="write">Whether the region was written to or read</param>
internal void Signal(ulong address, ulong size, bool write)
{
RegionSignal action = Interlocked.Exchange(ref _preAction, null);
action?.Invoke(address, size);
if (write)
{
Dirty = true;
Parent?.SignalWrite();
}
}
/// <summary>
/// Signal that a memory action occurred within this handle's virtual regions.
/// </summary>
/// <param name="address">Address accessed</param>
/// <param name="size">Size of the region affected in bytes</param>
/// <param name="write">Whether the region was written to or read</param>
/// <param name="handleIterable">Reference to the handles being iterated, in case the list needs to be copied</param>
internal void Signal(ulong address, ulong size, bool write, ref IList <RegionHandle> handleIterable)
{
// If this handle was already unmapped (even if just partially),
// then we have nothing to do until it is mapped again.
// The pre-action should be still consumed to avoid flushing on remap.
if (Unmapped)
{
Interlocked.Exchange(ref _preAction, null);
return;
}
if (_preAction != null)
{
// Copy the handles list in case it changes when we're out of the lock.
if (handleIterable is List <RegionHandle> )
{
handleIterable = handleIterable.ToArray();
}
// Temporarily release the tracking lock while we're running the action.
Monitor.Exit(_tracking.TrackingLock);
try
{
lock (_preActionLock)
{
_preAction?.Invoke(address, size);
// The action is removed after it returns, to ensure that the null check above succeeds when
// it's still in progress rather than continuing and possibly missing a required data flush.
Interlocked.Exchange(ref _preAction, null);
}
}
finally
{
Monitor.Enter(_tracking.TrackingLock);
}
}
if (write)
{
bool oldDirty = Dirty;
Dirty = true;
if (!oldDirty)
{
_onDirty?.Invoke();
}
Parent?.SignalWrite();
}
}