private void WeavePropertySetter(MethodDefinition setter, MethodDefinition propertyGet)
{
setter.Body.InitLocals = true;
setter.Body.SimplifyMacros();
Instruction firstInstruction = setter.Body.Instructions.First();
ILProcessor processor = setter.Body.GetILProcessor();
// Add local variables
int cacheKeyIndex = setter.AddVariable <string>();
// Generate CacheKeyTemplate
string cacheKey = CreateCacheKeyString(setter);
Instruction current = firstInstruction.Prepend(processor.Create(OpCodes.Ldstr, cacheKey), processor);
// Create set cache key
current = current.AppendStloc(processor, cacheKeyIndex);
current = InjectCacheKeyCreatedCode(setter, current, processor, cacheKeyIndex);
if (LogDebugOutput)
{
current = current.AppendDebugWrite(processor, "Clearing cache.", ModuleDefinition);
}
if (!setter.IsStatic)
{
current = current.AppendLdarg(processor, 0);
}
current.Append(processor.Create(OpCodes.Call, setter.Module.Import(propertyGet)), processor)
.AppendLdloc(processor, cacheKeyIndex)
.Append(
processor.Create(OpCodes.Callvirt,
setter.Module.Import(CacheTypeGetRemoveMethod(propertyGet.ReturnType.Resolve(), CacheTypeRemoveMethodName))),
processor);
setter.Body.OptimizeMacros();
}
private void WeaveMethod(MethodDefinition methodDefinition, MethodDefinition propertyGet)
{
methodDefinition.Body.InitLocals = true;
methodDefinition.Body.SimplifyMacros();
Instruction firstInstruction = methodDefinition.Body.Instructions.First();
ICollection <Instruction> returnInstructions =
methodDefinition.Body.Instructions.ToList().Where(x => x.OpCode == OpCodes.Ret).ToList();
if (returnInstructions.Count == 0)
{
LogWarning(string.Format("Method {0} does not contain any return statement. Skip weaving of method {0}.",
methodDefinition.Name));
return;
}
// Add local variables
int cacheKeyIndex = methodDefinition.AddVariable <string>();
int resultIndex = methodDefinition.AddVariable(methodDefinition.ReturnType);
int objectArrayIndex = methodDefinition.AddVariable <object[]>();
ILProcessor processor = methodDefinition.Body.GetILProcessor();
// Generate CacheKeyTemplate
string cacheKey = CreateCacheKeyString(methodDefinition);
Instruction current = firstInstruction.Prepend(processor.Create(OpCodes.Ldstr, cacheKey), processor);
current = SetCacheKeyLocalVariable(current, methodDefinition, processor, cacheKeyIndex, objectArrayIndex);
current = InjectCacheKeyCreatedCode(methodDefinition, current, processor, cacheKeyIndex);
TypeDefinition propertyGetReturnTypeDefinition = propertyGet.ReturnType.Resolve();
if (!methodDefinition.IsStatic)
{
current = current.AppendLdarg(processor, 0);
}
MethodReference methodReferenceContain =
methodDefinition.Module.Import(CacheTypeGetContainsMethod(propertyGetReturnTypeDefinition,
CacheTypeContainsMethodName));
current =
current.Append(processor.Create(OpCodes.Call, methodDefinition.Module.Import(propertyGet)), processor)
.AppendLdloc(processor, cacheKeyIndex)
.Append(processor.Create(OpCodes.Callvirt, methodReferenceContain), processor)
.Append(processor.Create(OpCodes.Brfalse, firstInstruction), processor);
// False branche (store value in cache of each return instruction)
foreach (Instruction returnInstruction in returnInstructions)
{
returnInstruction.Previous.AppendStloc(processor, resultIndex);
if (LogDebugOutput)
{
returnInstruction.Previous.AppendDebugWrite(processor, "Storing to cache.", methodDefinition.Module);
}
if (!methodDefinition.IsStatic)
{
returnInstruction.Previous.AppendLdarg(processor, 0);
}
MethodReference methodReferenceReturn =
methodDefinition.Module.Import(CacheTypeGetStoreMethod(propertyGetReturnTypeDefinition, CacheTypeStoreMethodName));
returnInstruction.Previous.Append(processor.Create(OpCodes.Call, methodDefinition.Module.Import(propertyGet)),
processor)
.AppendLdloc(processor, cacheKeyIndex)
.AppendLdloc(processor, resultIndex)
.AppendBoxIfNecessary(processor, methodDefinition.ReturnType)
.Append(processor.Create(OpCodes.Callvirt, methodReferenceReturn), processor)
.AppendLdloc(processor, resultIndex);
}
if (LogDebugOutput)
{
current = current.AppendDebugWrite(processor, "Loading from cache.", methodDefinition.Module);
}
if (!methodDefinition.IsStatic)
{
current = current.AppendLdarg(processor, 0);
}
// Start of branche true
MethodReference methodReferenceRetrieve =
methodDefinition.Module.Import(CacheTypeGetRetrieveMethod(propertyGetReturnTypeDefinition,
CacheTypeRetrieveMethodName)).MakeGeneric(new[] { methodDefinition.ReturnType });
current.Append(processor.Create(OpCodes.Call, methodDefinition.Module.Import(propertyGet)), processor)
.AppendLdloc(processor, cacheKeyIndex)
.Append(processor.Create(OpCodes.Callvirt, methodReferenceRetrieve), processor)
.AppendStloc(processor, resultIndex)
.Append(processor.Create(OpCodes.Br, returnInstructions.Last().Previous), processor);
methodDefinition.Body.OptimizeMacros();
}