Yves
31f9ca9ebf
Changes the CallFunction implementation to use macros because otherwise we'd have to write twice as many functions manually. Adapts GetSavedGameData to use the new function template. Additional callers will be changed in future commits. Refs #2415 Refs #2462 This was SVN commit r15541.
183 lines
6.5 KiB
C++
183 lines
6.5 KiB
C++
/* Copyright (C) 2014 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ps/GameSetup/Config.h"
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// (NativeWrapperDecls.h set up a lot of the macros we use here)
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// ScriptInterface_NativeWrapper<T>::call(cx, rval, fptr, args...) will call fptr(cbdata, args...),
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// and if T != void then it will store the result in rval:
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// Templated on the return type so void can be handled separately
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template <typename R>
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struct ScriptInterface_NativeWrapper {
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#define OVERLOADS(z, i, data) \
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template<TYPENAME_T0_HEAD(z,i) typename F> \
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static void call(JSContext* cx, JS::MutableHandleValue rval, F fptr T0_A0(z,i)) { \
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ScriptInterface::ToJSVal<R>(cx, rval, fptr(ScriptInterface::GetScriptInterfaceAndCBData(cx) A0_TAIL(z,i))); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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};
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// Overloaded to ignore the return value from void functions
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template <>
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struct ScriptInterface_NativeWrapper<void> {
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#define OVERLOADS(z, i, data) \
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template<TYPENAME_T0_HEAD(z,i) typename F> \
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static void call(JSContext* cx, JS::MutableHandleValue /*rval*/, F fptr T0_A0(z,i)) { \
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fptr(ScriptInterface::GetScriptInterfaceAndCBData(cx) A0_TAIL(z,i)); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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};
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// Same idea but for method calls:
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template <typename R, typename TC>
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struct ScriptInterface_NativeMethodWrapper {
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#define OVERLOADS(z, i, data) \
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template<TYPENAME_T0_HEAD(z,i) typename F> \
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static void call(JSContext* cx, JS::MutableHandleValue rval, TC* c, F fptr T0_A0(z,i)) { \
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ScriptInterface::ToJSVal<R>(cx, rval, (c->*fptr)( A0(z,i) )); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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};
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template <typename TC>
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struct ScriptInterface_NativeMethodWrapper<void, TC> {
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#define OVERLOADS(z, i, data) \
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template<TYPENAME_T0_HEAD(z,i) typename F> \
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static void call(JSContext* /*cx*/, JS::MutableHandleValue /*rval*/, TC* c, F fptr T0_A0(z,i)) { \
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(c->*fptr)( A0(z,i) ); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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};
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// Fast natives don't trigger the hook we use for profiling, so explicitly
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// notify the profiler when these functions are being called.
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// ScriptInterface_impl::Register stores the name in a reserved slot.
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// (TODO: this doesn't work for functions registered via InterfaceScripted.h.
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// Maybe we should do some interned JS_GetFunctionId thing.)
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#define SCRIPT_PROFILE \
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if (g_ScriptProfilingEnabled) \
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{ \
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ENSURE(JS_CALLEE(cx, vp).isObject() && JS_ObjectIsFunction(cx, &JS_CALLEE(cx, vp).toObject())); \
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const char* name = "(unknown)"; \
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jsval nameval; \
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nameval = JS_GetReservedSlot( &JS_CALLEE(cx, vp).toObject(), 0); \
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if (!nameval.isUndefined()) \
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name = static_cast<const char*>(JSVAL_TO_PRIVATE(nameval)); \
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CProfileSampleScript profile(name); \
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}
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// JSFastNative-compatible function that wraps the function identified in the template argument list
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#define OVERLOADS(z, i, data) \
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template <typename R, TYPENAME_T0_HEAD(z,i) R (*fptr) ( ScriptInterface::CxPrivate* T0_TAIL(z,i) )> \
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JSBool ScriptInterface::call(JSContext* cx, uint argc, jsval* vp) { \
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp); \
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JSAutoRequest rq(cx); \
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SCRIPT_PROFILE \
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BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
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JS::RootedValue rval(cx); \
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ScriptInterface_NativeWrapper<R>::call(cx, &rval, fptr A0_TAIL(z,i)); \
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args.rval().set(rval); \
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return !ScriptInterface::IsExceptionPending(cx); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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// Same idea but for methods
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#define OVERLOADS(z, i, data) \
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template <typename R, TYPENAME_T0_HEAD(z,i) JSClass* CLS, typename TC, R (TC::*fptr) ( T0(z,i) )> \
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JSBool ScriptInterface::callMethod(JSContext* cx, uint argc, jsval* vp) { \
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp); \
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JSAutoRequest rq(cx); \
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SCRIPT_PROFILE \
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if (ScriptInterface::GetClass(JS_THIS_OBJECT(cx, vp)) != CLS) return false; \
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TC* c = static_cast<TC*>(ScriptInterface::GetPrivate(JS_THIS_OBJECT(cx, vp))); \
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if (! c) return false; \
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BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
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JS::RootedValue rval(cx); \
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ScriptInterface_NativeMethodWrapper<R, TC>::call(cx, &rval, c, fptr A0_TAIL(z,i)); \
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args.rval().set(rval); \
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return !ScriptInterface::IsExceptionPending(cx); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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#define TO_JS_VAL(z, i, data) ToJSVal(cx, argv.handleAt(i), a##i);
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#define OVERLOADS(z, i, data) \
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template<typename R TYPENAME_T0_TAIL(z, i)> \
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bool ScriptInterface::CallFunction(jsval val, const char* name, T0_A0_CONST_REF(z,i) R& ret) \
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{ \
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JSContext* cx = GetContext(); \
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JSAutoRequest rq(cx); \
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JS::RootedValue jsRet(cx); \
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JS::RootedValue val1(cx, val); \
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JS::AutoValueVector argv(cx); \
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argv.resize(i); \
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BOOST_PP_REPEAT_##z (i, TO_JS_VAL, ~) \
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bool ok = CallFunction_(val1, name, argv.length(), argv.begin(), &jsRet); \
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if (!ok) \
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return false; \
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return FromJSVal(cx, jsRet, ret); \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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#define OVERLOADS(z, i, data) \
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template<typename R TYPENAME_T0_TAIL(z, i)> \
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bool ScriptInterface::CallFunction(jsval val, const char* name, T0_A0_CONST_REF(z,i) JS::Rooted<R>* ret) \
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{ \
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JSContext* cx = GetContext(); \
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JSAutoRequest rq(cx); \
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JS::MutableHandle<R> jsRet(ret); \
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JS::RootedValue val1(cx, val); \
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JS::AutoValueVector argv(cx); \
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argv.resize(i); \
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BOOST_PP_REPEAT_##z (i, TO_JS_VAL, ~) \
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bool ok = CallFunction_(val1, name, argv.length(), argv.begin(), jsRet); \
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if (!ok) \
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return false; \
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return true; \
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}
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BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
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#undef OVERLOADS
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// Clean up our mess
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#undef SCRIPT_PROFILE
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#undef NUMBERED_LIST_HEAD
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#undef NUMBERED_LIST_TAIL
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#undef NUMBERED_LIST_BALANCED
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#undef TYPED_ARGS_CONST_REF
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#undef TYPED_ARGS
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#undef CONVERT_ARG
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#undef TYPENAME_T0_HEAD
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#undef TYPENAME_T0_TAIL
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#undef T0
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#undef T0_HEAD
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#undef T0_TAIL
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#undef T0_A0_CONST_REF
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#undef T0_A0
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#undef A0
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#undef A0_TAIL
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