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// slang-ir-marshal-native-call.h
#include "slang-ir-marshal-native-call.h"
#include "slang-ir.h"
#include "slang-ir-insts.h"
namespace Slang
{
IRType* NativeCallMarshallingContext::getNativeType(IRBuilder& builder, IRType* type)
{
switch (type->getOp())
{
case kIROp_StringType:
return builder.getNativeStringType();
case kIROp_InterfaceType:
return builder.getNativePtrType(type);
case kIROp_ComPtrType:
return builder.getNativePtrType((IRType*)as<IRComPtrType>(type)->getOperand(0));
default:
return type;
}
}
IRFuncType* NativeCallMarshallingContext::getNativeFuncType(
IRBuilder& builder, IRFuncType* declaredFuncType)
{
List<IRInst*> nativeParamTypes;
assert(declaredFuncType->getOp() == kIROp_FuncType);
for (UInt i = 0; i < declaredFuncType->getParamCount(); ++i)
{
auto paramType = declaredFuncType->getParamType(i);
nativeParamTypes.add(getNativeType(builder, as<IRType>(paramType)));
}
IRType* returnType = declaredFuncType->getResultType();
if (auto resultType = as<IRResultType>(declaredFuncType->getResultType()))
{
auto nativeResultType = getNativeType(builder, resultType->getValueType());
nativeParamTypes.add(builder.getPtrType(nativeResultType));
returnType = resultType->getErrorType();
}
else
{
returnType = getNativeType(builder, returnType);
}
auto funcType = builder.getFuncType(
nativeParamTypes.getCount(), (IRType**)nativeParamTypes.getBuffer(), returnType);
return funcType;
}
void NativeCallMarshallingContext::marshalRefManagedValueToNativeValue(
IRBuilder& builder, IRInst* originalArg, List<IRInst*>& args)
{
auto ptrTypeBase = as<IRPtrTypeBase>(originalArg->getDataType());
SLANG_RELEASE_ASSERT(ptrTypeBase);
switch (ptrTypeBase->getValueType()->getOp())
{
case kIROp_InterfaceType:
case kIROp_ComPtrType:
args.add(builder.emitGetManagedPtrWriteRef(originalArg));
break;
default:
args.add(originalArg);
break;
}
}
void NativeCallMarshallingContext::marshalManagedValueToNativeValue(
IRBuilder& builder, IRInst* originalArg, List<IRInst*>& args)
{
switch (originalArg->getDataType()->getOp())
{
case kIROp_InOutType:
case kIROp_RefType:
return marshalRefManagedValueToNativeValue(
builder, originalArg, args);
case kIROp_StringType:
{
auto nativeStr = builder.emitGetNativeString(originalArg);
args.add(nativeStr);
}
break;
case kIROp_InterfaceType:
{
auto nativePtr = builder.emitGetNativePtr(originalArg);
args.add(nativePtr);
}
break;
default:
args.add(originalArg);
break;
}
}
IRInst* NativeCallMarshallingContext::marshalNativeValueToManagedValue(
IRBuilder& builder, IRInst* nativeVal)
{
switch (nativeVal->getDataType()->getOp())
{
case kIROp_NativeStringType:
{
return builder.emitMakeString(nativeVal);
}
break;
case kIROp_NativePtrType:
{
SLANG_RELEASE_ASSERT(nativeVal->getDataType()->getOperand(0)->getOp() == kIROp_InterfaceType);
auto comPtrVar = builder.emitVar(builder.getComPtrType((IRType*)nativeVal->getDataType()->getOperand(0)));
builder.emitManagedPtrAttach(comPtrVar, nativeVal);
return builder.emitLoad(comPtrVar);
}
break;
case kIROp_InterfaceType:
{
auto comPtrVar = builder.emitVar(nativeVal->getDataType());
builder.emitManagedPtrAttach(comPtrVar, nativeVal);
return builder.emitLoad(comPtrVar);
}
break;
default:
return nativeVal;
break;
}
}
IRInst* NativeCallMarshallingContext::marshalNativeCall(
IRBuilder& builder,
IRFuncType* originalFuncType,
IRFuncType* nativeFuncType,
IRInst* nativeFunc,
Int argCount,
IRInst*const* originalArgs)
{
// Marshal parameters to arguments into native func.
List<IRInst*> args;
for (Int i = 0; i < argCount; i++)
{
marshalManagedValueToNativeValue(builder, originalArgs[i], args);
}
IRType* originalReturnType = originalFuncType->getResultType();
IRVar* resultVar = nullptr;
if (auto resultType = as<IRResultType>(originalReturnType))
{
// Declare a local variable to receive result.
resultVar = builder.emitVar(getNativeType(builder, resultType->getValueType()));
args.add(resultVar);
}
// Insert call.
IRInst* call = builder.emitCallInst(nativeFuncType->getResultType(), nativeFunc, args);
// TODO: marshal output/ref args back to original args.
IRInst* returnValue = call;
// Marshal result and out arguments back to managed values.
if (auto resultType = as<IRResultType>(originalReturnType))
{
auto val = builder.emitLoad(resultVar);
auto err = call;
val = marshalNativeValueToManagedValue(builder, val);
auto intErr = err;
if (err->getDataType()->getOp() != kIROp_IntType)
{
intErr = builder.emitConstructorInst(builder.getIntType(), 1, &err);
}
auto errIsError = builder.emitLess(intErr, builder.getIntValue(builder.getIntType(), 0));
IRBlock *trueBlock, *falseBlock, *afterBlock;
builder.emitIfElseWithBlocks(errIsError, trueBlock, falseBlock, afterBlock);
builder.setInsertInto(trueBlock);
returnValue = builder.emitMakeResultError(resultType, err);
builder.emitBranch(afterBlock, 1, &returnValue);
builder.setInsertInto(falseBlock);
returnValue = builder.emitMakeResultValue(resultType, val);
builder.emitBranch(afterBlock, 1, &returnValue);
builder.setInsertInto(afterBlock);
returnValue = builder.emitParam(resultType);
}
else
{
returnValue = marshalNativeValueToManagedValue(builder, call);
}
return returnValue;
}
} // namespace Slang
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