#pragma once
#include "JSCJSValue.h"
#include "JSCPtrTag.h"
namespace JSC {
class ExecState;
typedef EncodedJSValue (JSC_HOST_CALL *RawNativeFunction)(ExecState*);
class NativeFunction {
public:
NativeFunction() = default;
NativeFunction(std::nullptr_t) : m_ptr(nullptr) { }
explicit NativeFunction(uintptr_t bits) : m_ptr(bitwise_cast<RawNativeFunction>(bits)) { }
NativeFunction(RawNativeFunction other) : m_ptr(other) { }
explicit operator intptr_t() const { return reinterpret_cast<intptr_t>(m_ptr); }
explicit operator bool() const { return !!m_ptr; }
bool operator!() const { return !m_ptr; }
bool operator==(NativeFunction other) const { return m_ptr == other.m_ptr; }
bool operator!=(NativeFunction other) const { return m_ptr == other.m_ptr; }
EncodedJSValue operator()(ExecState* exec) { return m_ptr(exec); }
void* rawPointer() const { return reinterpret_cast<void*>(m_ptr); }
private:
RawNativeFunction m_ptr;
friend class TaggedNativeFunction;
};
struct NativeFunctionHash {
static unsigned hash(NativeFunction key) { return IntHash<uintptr_t>::hash(bitwise_cast<uintptr_t>(key)); }
static bool equal(NativeFunction a, NativeFunction b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
class TaggedNativeFunction {
public:
TaggedNativeFunction() = default;
TaggedNativeFunction(std::nullptr_t) : m_ptr(nullptr) { }
explicit TaggedNativeFunction(intptr_t bits) : m_ptr(bitwise_cast<void*>(bits)) { }
TaggedNativeFunction(NativeFunction func)
: m_ptr(tagCFunctionPtr<void*, JSEntryPtrTag>(func.m_ptr))
{ }
TaggedNativeFunction(RawNativeFunction func)
: m_ptr(tagCFunctionPtr<void*, JSEntryPtrTag>(func))
{ }
explicit operator bool() const { return !!m_ptr; }
bool operator!() const { return !m_ptr; }
bool operator==(TaggedNativeFunction other) const { return m_ptr == other.m_ptr; }
bool operator!=(TaggedNativeFunction other) const { return m_ptr != other.m_ptr; }
EncodedJSValue operator()(ExecState* exec) { return NativeFunction(*this)(exec); }
explicit operator NativeFunction()
{
ASSERT(m_ptr);
return untagCFunctionPtr<NativeFunction, JSEntryPtrTag>(m_ptr);
}
void* rawPointer() const { return m_ptr; }
private:
void* m_ptr;
};
struct TaggedNativeFunctionHash {
static unsigned hash(TaggedNativeFunction key) { return IntHash<uintptr_t>::hash(bitwise_cast<uintptr_t>(key)); }
static bool equal(TaggedNativeFunction a, TaggedNativeFunction b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
static_assert(sizeof(NativeFunction) == sizeof(void*), "");
static_assert(sizeof(TaggedNativeFunction) == sizeof(void*), "");
}
namespace WTF {
template<typename T> struct DefaultHash;
template<> struct DefaultHash<JSC::NativeFunction> {
using Hash = JSC::NativeFunctionHash;
};
template<typename T> struct DefaultHash;
template<> struct DefaultHash<JSC::TaggedNativeFunction> {
using Hash = JSC::TaggedNativeFunctionHash;
};
}