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/* Copyright (C) 2014 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ps/GameSetup/Config.h"
// (NativeWrapperDecls.h set up a lot of the macros we use here)
// ScriptInterface_NativeWrapper<T>::call(cx, rval, fptr, args...) will call fptr(cbdata, args...),
// and if T != void then it will store the result in rval:
// Templated on the return type so void can be handled separately
template <typename R>
struct ScriptInterface_NativeWrapper {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, JS::MutableHandleValue rval, F fptr T0_A0(z,i)) { \
ScriptInterface* pScriptInterface = ScriptInterface::GetScriptInterfaceAndCBData(cx)->pScriptInterface; \
pScriptInterface->AssignOrToJSVal<R>(rval, fptr(ScriptInterface::GetScriptInterfaceAndCBData(cx) A0_TAIL(z,i))); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// Overloaded to ignore the return value from void functions
template <>
struct ScriptInterface_NativeWrapper<void> {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, JS::MutableHandleValue /*rval*/, F fptr T0_A0(z,i)) { \
fptr(ScriptInterface::GetScriptInterfaceAndCBData(cx) A0_TAIL(z,i)); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// Same idea but for method calls:
template <typename R, typename TC>
struct ScriptInterface_NativeMethodWrapper {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, JS::MutableHandleValue rval, TC* c, F fptr T0_A0(z,i)) { \
ScriptInterface* pScriptInterface = ScriptInterface::GetScriptInterfaceAndCBData(cx)->pScriptInterface; \
pScriptInterface->AssignOrToJSVal<R>(rval, (c->*fptr)( A0(z,i) )); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
template <typename TC>
struct ScriptInterface_NativeMethodWrapper<void, TC> {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* /*cx*/, JS::MutableHandleValue /*rval*/, TC* c, F fptr T0_A0(z,i)) { \
(c->*fptr)( A0(z,i) ); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// Fast natives don't trigger the hook we use for profiling, so explicitly
// notify the profiler when these functions are being called.
// ScriptInterface_impl::Register stores the name in a reserved slot.
// (TODO: this doesn't work for functions registered via InterfaceScripted.h.
// Maybe we should do some interned JS_GetFunctionId thing.)
#define SCRIPT_PROFILE \
if (g_ScriptProfilingEnabled) \
{ \
ENSURE(JS_CALLEE(cx, vp).isObject() && JS_ObjectIsFunction(cx, &JS_CALLEE(cx, vp).toObject())); \
const char* name = "(unknown)"; \
jsval nameval; \
nameval = JS_GetReservedSlot( &JS_CALLEE(cx, vp).toObject(), 0); \
if (!nameval.isUndefined()) \
name = static_cast<const char*>(JSVAL_TO_PRIVATE(nameval)); \
CProfileSampleScript profile(name); \
}
// JSFastNative-compatible function that wraps the function identified in the template argument list
#define OVERLOADS(z, i, data) \
template <typename R, TYPENAME_T0_HEAD(z,i) R (*fptr) ( ScriptInterface::CxPrivate* T0_TAIL(z,i) )> \
JSBool ScriptInterface::call(JSContext* cx, uint argc, jsval* vp) { \
JS::CallArgs args = JS::CallArgsFromVp(argc, vp); \
JSAutoRequest rq(cx); \
SCRIPT_PROFILE \
BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
JS::RootedValue rval(cx); \
ScriptInterface_NativeWrapper<R>::call(cx, &rval, fptr A0_TAIL(z,i)); \
args.rval().set(rval); \
return !ScriptInterface::IsExceptionPending(cx); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
// Same idea but for methods
#define OVERLOADS(z, i, data) \
template <typename R, TYPENAME_T0_HEAD(z,i) JSClass* CLS, typename TC, R (TC::*fptr) ( T0(z,i) )> \
JSBool ScriptInterface::callMethod(JSContext* cx, uint argc, jsval* vp) { \
JS::CallArgs args = JS::CallArgsFromVp(argc, vp); \
JSAutoRequest rq(cx); \
SCRIPT_PROFILE \
JS::RootedObject thisObj(cx, JS_THIS_OBJECT(cx, vp)); \
if (ScriptInterface::GetClass(thisObj) != CLS) return false; \
TC* c = static_cast<TC*>(ScriptInterface::GetPrivate(thisObj)); \
if (! c) return false; \
BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
JS::RootedValue rval(cx); \
ScriptInterface_NativeMethodWrapper<R, TC>::call(cx, &rval, c, fptr A0_TAIL(z,i)); \
args.rval().set(rval); \
return !ScriptInterface::IsExceptionPending(cx); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
#define ASSIGN_OR_TO_JS_VAL(z, i, data) AssignOrToJSVal(argv.handleAt(i), a##i);
#define OVERLOADS(z, i, data) \
template<typename R TYPENAME_T0_TAIL(z, i)> \
bool ScriptInterface::CallFunction(JS::HandleValue val, const char* name, T0_A0_CONST_REF(z,i) R& ret) \
{ \
JSContext* cx = GetContext(); \
JSAutoRequest rq(cx); \
JS::RootedValue jsRet(cx); \
JS::AutoValueVector argv(cx); \
argv.resize(i); \
BOOST_PP_REPEAT_##z (i, ASSIGN_OR_TO_JS_VAL, ~) \
bool ok = CallFunction_(val, name, argv.length(), argv.begin(), &jsRet); \
if (!ok) \
return false; \
return FromJSVal(cx, jsRet, ret); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
#define OVERLOADS(z, i, data) \
template<typename R TYPENAME_T0_TAIL(z, i)> \
bool ScriptInterface::CallFunction(JS::HandleValue val, const char* name, T0_A0_CONST_REF(z,i) JS::Rooted<R>* ret) \
{ \
JSContext* cx = GetContext(); \
JSAutoRequest rq(cx); \
JS::MutableHandle<R> jsRet(ret); \
JS::AutoValueVector argv(cx); \
argv.resize(i); \
BOOST_PP_REPEAT_##z (i, ASSIGN_OR_TO_JS_VAL, ~) \
bool ok = CallFunction_(val, name, argv.length(), argv.begin(), jsRet); \
if (!ok) \
return false; \
return true; \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
#define OVERLOADS(z, i, data) \
template<typename R TYPENAME_T0_TAIL(z, i)> \
bool ScriptInterface::CallFunction(JS::HandleValue val, const char* name, T0_A0_CONST_REF(z,i) JS::MutableHandle<R> ret) \
{ \
JSContext* cx = GetContext(); \
JSAutoRequest rq(cx); \
JS::AutoValueVector argv(cx); \
argv.resize(i); \
BOOST_PP_REPEAT_##z (i, ASSIGN_OR_TO_JS_VAL, ~) \
bool ok = CallFunction_(val, name, argv.length(), argv.begin(), ret); \
if (!ok) \
return false; \
return true; \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
#undef ASSIGN_OR_TO_JS_VAL
// Clean up our mess
#undef SCRIPT_PROFILE
#undef NUMBERED_LIST_HEAD
#undef NUMBERED_LIST_TAIL
#undef NUMBERED_LIST_BALANCED
#undef TYPED_ARGS_CONST_REF
#undef TYPED_ARGS
#undef CONVERT_ARG
#undef TYPENAME_T0_HEAD
#undef TYPENAME_T0_TAIL
#undef T0
#undef T0_HEAD
#undef T0_TAIL
#undef T0_A0_CONST_REF
#undef T0_A0
#undef A0
#undef A0_TAIL
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