/// <summary>
/// Updates the specified <see cref="target"/> object with new data.
/// </summary>
/// <param name="target">The object to update.</param>
/// <param name="compiledUpdate">The precompiled list of update operations, generated by <see cref="Compile"/>.</param>
/// <param name="updateData">The data source for blittable struct.</param>
/// <param name="updateObjects">The data source for objects and non-blittable struct</param>
public static void Run(object target, CompiledUpdate compiledUpdate, IntPtr updateData, UpdateObjectData[] updateObjects)
{
var operations = compiledUpdate.UpdateOperations;
var temporaryObjects = compiledUpdate.TemporaryObjects;
var stack = new Stack <UpdateStackEntry>();
// Current object being processed
object currentObj = target;
object nextObject;
// This object needs to be pinned since we will have a pointer to its memory
// Note that the stack don't need to have each of its object pinned since we store entries as object + offset
Interop.Pin(currentObj);
// pinned test (this will need to be on a stack somehow)
IntPtr currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj);
var operationCount = operations.Length;
if (operationCount == 0)
{
return;
}
var operation = Interop.Pin(ref operations[0]);
for (int index = 0; index < operationCount; index++)
{
// Adjust offset
currentPtr += operation.AdjustOffset;
switch (operation.Type)
{
case UpdateOperationType.EnterObjectProperty:
{
nextObject = ((UpdatableProperty)operation.Member).GetObject(currentPtr);
if (nextObject == null && operation.SkipCountIfNull != -1)
{
index += operation.SkipCountIfNull;
operation = Interop.AddPinned(operation, operation.SkipCountIfNull);
break;
}
// Compute offset and push to stack
stack.Push(new UpdateStackEntry(
currentObj,
(int)((byte *)currentPtr - (byte *)UpdateEngineHelper.ObjectToPtr(currentObj))
));
// Get object
currentObj = nextObject;
currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj);
break;
}
case UpdateOperationType.EnterStructPropertyBase:
{
// Compute offset and push to stack
stack.Push(new UpdateStackEntry(
currentObj,
(int)((byte *)currentPtr - (byte *)UpdateEngineHelper.ObjectToPtr(currentObj))
));
currentObj = temporaryObjects[operation.DataOffset];
currentPtr = ((UpdatablePropertyBase)operation.Member).GetStructAndUnbox(currentPtr, currentObj);
break;
}
case UpdateOperationType.EnterObjectField:
{
nextObject = ((UpdatableField)operation.Member).GetObject(currentPtr);
if (nextObject == null && operation.SkipCountIfNull != -1)
{
index += operation.SkipCountIfNull;
operation = Interop.AddPinned(operation, operation.SkipCountIfNull);
break;
}
// Compute offset and push to stack
stack.Push(new UpdateStackEntry(
currentObj,
(int)((byte *)currentPtr - (byte *)UpdateEngineHelper.ObjectToPtr(currentObj))
));
// Get object
currentObj = nextObject;
currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj);
break;
}
case UpdateOperationType.EnterObjectCustom:
{
nextObject = ((UpdatableCustomAccessor)operation.Member).GetObject(currentPtr);
if (nextObject == null && operation.SkipCountIfNull != -1)
{
index += operation.SkipCountIfNull;
operation = Interop.AddPinned(operation, operation.SkipCountIfNull);
break;
}
// Compute offset and push to stack
stack.Push(new UpdateStackEntry(
currentObj,
(int)((byte *)currentPtr - (byte *)UpdateEngineHelper.ObjectToPtr(currentObj))
));
// Get object
currentObj = nextObject;
currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj);
break;
}
case UpdateOperationType.LeaveAndCopyStructPropertyBase:
{
// Save back struct pointer
var oldPtr = currentPtr;
// Restore currentObj and currentPtr from stack
var stackEntry = stack.Pop();
currentObj = stackEntry.Object;
currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj) + stackEntry.Offset;
// Use setter to set back struct
((UpdatablePropertyBase)operation.Member).SetBlittable(currentPtr, oldPtr);
break;
}
case UpdateOperationType.Leave:
{
// Restore currentObj and currentPtr from stack
var stackEntry = stack.Pop();
currentObj = stackEntry.Object;
currentPtr = UpdateEngineHelper.ObjectToPtr(currentObj) + stackEntry.Offset;
break;
}
case UpdateOperationType.ConditionalSetObjectProperty:
{
var updateObject = updateObjects[operation.DataOffset];
if (updateObject.Condition != 0) // 0 is 0.0f in float
{
((UpdatableProperty)operation.Member).SetObject(currentPtr, updateObject.Value);
}
break;
}
case UpdateOperationType.ConditionalSetBlittablePropertyBase:
{
// TODO: This case can happen quite often (i.e. a float property) and require an extra indirection
// We could probably avoid it by having common types as non virtual methods (i.e. object, int, float, maybe even Vector3/4?)
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
((UpdatablePropertyBase)operation.Member).SetBlittable(currentPtr, (IntPtr)data);
}
break;
}
case UpdateOperationType.ConditionalSetStructPropertyBase:
{
// TODO: This case can happen quite often (i.e. a float property) and require an extra indirection
// We could probably avoid it by having common types as non virtual methods (i.e. object, int, float, maybe even Vector3/4?)
var updateObject = updateObjects[operation.DataOffset];
if (updateObject.Condition != 0) // 0 is 0.0f in float
{
((UpdatablePropertyBase)operation.Member).SetStruct(currentPtr, updateObject.Value);
}
break;
}
case UpdateOperationType.ConditionalSetObjectField:
{
var updateObject = updateObjects[operation.DataOffset];
if (updateObject.Condition != 0) // 0 is 0.0f in float
{
((UpdatableField)operation.Member).SetObject(currentPtr, updateObject.Value);
}
break;
}
case UpdateOperationType.ConditionalSetBlittableField:
{
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
((UpdatableField)operation.Member).SetBlittable(currentPtr, (IntPtr)data);
}
break;
}
case UpdateOperationType.ConditionalSetBlittableField4:
{
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
*(int *)currentPtr = *data;
}
break;
}
case UpdateOperationType.ConditionalSetBlittableField8:
{
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
*(Blittable8 *)currentPtr = *(Blittable8 *)data;
}
break;
}
case UpdateOperationType.ConditionalSetBlittableField12:
{
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
*(Blittable12 *)currentPtr = *(Blittable12 *)data;
}
break;
}
case UpdateOperationType.ConditionalSetBlittableField16:
{
var data = (int *)((byte *)updateData + operation.DataOffset);
if (*data++ != 0) // 0 is 0.0f in float
{
*(Blittable16 *)currentPtr = *(Blittable16 *)data;
}
break;
}
case UpdateOperationType.ConditionalSetStructField:
{
// Use setter to set back struct
var updateObject = updateObjects[operation.DataOffset];
if (updateObject.Condition != 0) // 0 is 0.0f in float
{
((UpdatableField)operation.Member).SetStruct(currentPtr, updateObject.Value);
}
break;
}
case UpdateOperationType.ConditionalSetObjectCustom:
{
var updateObject = updateObjects[operation.DataOffset];
if (updateObject.Condition != 0) // 0 is 0.0f in float
{
((UpdatableCustomAccessor)operation.Member).SetObject(currentPtr, updateObject.Value);
}
break;
}
default:
throw new ArgumentOutOfRangeException();
}
operation = Interop.IncrementPinned(operation);
}
}