public static void CreateHook(HookDescriptor hook)
{
try
{
SynchronizationHelper.BeginDescriptorUpdate(hook);
switch (hook.HookType)
{
case HookType.EventHook:
{
HookEvent(hook);
break;
}
case HookType.ServiceFunction:
{
CreateServiceFunction(hook);
break;
}
default:
throw new ArgumentException("descriptor");
}
}
finally
{
SynchronizationHelper.EndUpdate(hook);
}
}
private static void CreateServiceFunction(HookDescriptor hook)
{
if (!ServiceManager.ServiceExists(hook.Name))
{
hook.MirandaHandle = MirandaContext.Current.PluginLink.NativePluginLink.CreateServiceFunction(hook.Name, hook.Callback);
if (hook.MirandaHandle == IntPtr.Zero)
throw new MirandaException(String.Format(TextResources.ExceptionMsg_Formatable1_ServiceFunctionCreationFailed, hook.Name));
}
else
{
if (!hook.Owner.ServiceFunctions.Exists(delegate(HookDescriptor _hook)
{
return _hook.Equals(hook) && _hook.MirandaHandle != IntPtr.Zero;
}))
throw new InvalidOperationException(String.Format(TextResources.ExceptionMsg_Formatable1_ServiceFunctionAlreadyExists, hook.Name));
}
}
public void AddHook(uint addr, Action<uint> hook)
{
lock(hooks)
{
if(!hooks.ContainsKey(addr))
{
hooks[addr] = new HookDescriptor(this, addr);
}
hooks[addr].AddCallback(hook);
this.DebugLog("Added hook @ 0x{0:X}", addr);
}
}
private static void HookEvent(HookDescriptor hook)
{
hook.MirandaHandle = MirandaContext.Current.PluginLink.NativePluginLink.HookEvent(hook.Name, hook.Callback);
if (hook.MirandaHandle == IntPtr.Zero)
throw new MirandaException(String.Format(TextResources.ExceptionMsg_Formatable1_EventHookingFailed, hook.Name));
}
private static void DestroyServiceFunction(HookDescriptor descriptor)
{
if (descriptor == null)
throw new ArgumentNullException("descriptor");
if (descriptor.HookType != HookType.ServiceFunction)
throw new ArgumentOutOfRangeException("descriptor");
if (descriptor.MirandaHandle == IntPtr.Zero)
return;
try
{
SynchronizationHelper.BeginDescriptorUpdate(descriptor);
int result = MirandaContext.Current.PluginLink.NativePluginLink.DestroyServiceFunction(descriptor.MirandaHandle);
Debug.Assert(result == 0);
descriptor.MirandaHandle = IntPtr.Zero;
}
finally
{
SynchronizationHelper.EndUpdate(descriptor);
}
}
