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#include "WAVM/IR/Types.h"
#include <stdlib.h>
#include <string.h>
#include <new>
#include <utility>
#include "WAVM/Inline/Hash.h"
#include "WAVM/Inline/HashSet.h"
#include "WAVM/Platform/Diagnostics.h"
#include "WAVM/Platform/Mutex.h"
using namespace WAVM;
using namespace WAVM::IR;
struct TypeTupleHashPolicy
{
static bool areKeysEqual(TypeTuple left, TypeTuple right)
{
if(left.size() != right.size()) { return false; }
for(Uptr elemIndex = 0; elemIndex < left.size(); ++elemIndex)
{
if(left[elemIndex] != right[elemIndex]) { return false; }
}
return true;
}
static Uptr getKeyHash(TypeTuple typeTuple) { return typeTuple.getHash(); }
};
struct FunctionTypeHashPolicy
{
static bool areKeysEqual(FunctionType left, FunctionType right)
{
return left.params() == right.params() && left.results() == right.results();
}
static Uptr getKeyHash(FunctionType functionType) { return functionType.getHash(); }
};
IR::TypeTuple::Impl::Impl(Uptr inNumElems, const ValueType* inElems) : numElems(inNumElems)
{
if(numElems) { memcpy(elems, inElems, sizeof(ValueType) * numElems); }
hash = XXH<Uptr>(elems, numElems * sizeof(ValueType), 0);
}
IR::TypeTuple::Impl::Impl(const Impl& inCopy) : hash(inCopy.hash), numElems(inCopy.numElems)
{
if(numElems) { memcpy(elems, inCopy.elems, numElems * sizeof(ValueType)); }
}
IR::TypeTuple::TypeTuple(ValueType inElem) { impl = getUniqueImpl(1, &inElem); }
IR::TypeTuple::TypeTuple(const std::initializer_list<ValueType>& inElems)
{
impl = getUniqueImpl(inElems.size(), inElems.begin());
}
IR::TypeTuple::TypeTuple(const std::vector<ValueType>& inElems)
{
impl = getUniqueImpl(inElems.size(), inElems.data());
}
IR::TypeTuple::TypeTuple(const ValueType* inElems, Uptr numElems)
{
impl = getUniqueImpl(numElems, inElems);
}
struct GlobalUniqueTypeTuples
{
Platform::Mutex mutex;
HashSet<TypeTuple, TypeTupleHashPolicy> set;
std::vector<void*> impls;
~GlobalUniqueTypeTuples()
{
Platform::Mutex::Lock lock(mutex);
for(void* impl : impls) { free(impl); }
}
static GlobalUniqueTypeTuples& get()
{
static GlobalUniqueTypeTuples singleton;
return singleton;
}
private:
GlobalUniqueTypeTuples() = default;
};
const TypeTuple::Impl* IR::TypeTuple::getUniqueImpl(Uptr numElems, const ValueType* inElems)
{
if(numElems == 0)
{
static Impl emptyImpl(0, nullptr);
return &emptyImpl;
}
else
{
const Uptr numImplBytes = Impl::calcNumBytes(numElems);
Impl* localImpl = new(alloca(numImplBytes)) Impl(numElems, inElems);
GlobalUniqueTypeTuples& globalUniqueTypeTuples = GlobalUniqueTypeTuples::get();
Platform::Mutex::Lock lock(globalUniqueTypeTuples.mutex);
const TypeTuple* typeTuple = globalUniqueTypeTuples.set.get(TypeTuple(localImpl));
if(typeTuple) { return typeTuple->impl; }
else
{
Impl* globalImpl = new(malloc(numImplBytes)) Impl(*localImpl);
globalUniqueTypeTuples.set.addOrFail(TypeTuple(globalImpl));
globalUniqueTypeTuples.impls.push_back(globalImpl);
return globalImpl;
}
}
}
struct GlobalUniqueFunctionTypes
{
Platform::Mutex mutex;
HashSet<FunctionType, FunctionTypeHashPolicy> set;
std::vector<void*> impls;
~GlobalUniqueFunctionTypes()
{
Platform::Mutex::Lock lock(mutex);
for(void* impl : impls) { free(impl); }
}
static GlobalUniqueFunctionTypes& get()
{
static GlobalUniqueFunctionTypes singleton;
return singleton;
}
private:
GlobalUniqueFunctionTypes() = default;
};
IR::FunctionType::Impl::Impl(TypeTuple inResults,
TypeTuple inParams,
CallingConvention inCallingConvention)
: results(inResults), params(inParams), callingConvention(inCallingConvention)
{
hash = Hash<Uptr>()(results.getHash(), params.getHash());
hash = Hash<Uptr>()(hash, Uptr(callingConvention));
}
const FunctionType::Impl* IR::FunctionType::getUniqueImpl(TypeTuple results,
TypeTuple params,
CallingConvention callingConvention)
{
if(results.size() == 0 && params.size() == 0 && callingConvention == CallingConvention::wasm)
{
static Impl emptyImpl{TypeTuple(), TypeTuple(), CallingConvention::wasm};
return &emptyImpl;
}
else if(results.size() == 0 && params.size() == 0
&& callingConvention == CallingConvention::intrinsic)
{
static Impl emptyImpl{TypeTuple(), TypeTuple(), CallingConvention::intrinsic};
return &emptyImpl;
}
else
{
Impl localImpl(results, params, callingConvention);
GlobalUniqueFunctionTypes& globalUniqueFunctionTypes = GlobalUniqueFunctionTypes::get();
Platform::Mutex::Lock lock(globalUniqueFunctionTypes.mutex);
const FunctionType* functionType
= globalUniqueFunctionTypes.set.get(FunctionType(&localImpl));
if(functionType) { return functionType->impl; }
else
{
Impl* globalImpl = new(malloc(sizeof(Impl))) Impl(localImpl);
globalUniqueFunctionTypes.set.addOrFail(FunctionType(globalImpl));
globalUniqueFunctionTypes.impls.push_back(globalImpl);
return globalImpl;
}
}
}
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