godot/modules/mono/mono_gd/gd_mono_method_thunk.h
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* gd_mono_method_thunk.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef GD_MONO_METHOD_THUNK_H
#define GD_MONO_METHOD_THUNK_H
#include <type_traits>
#include "gd_mono_class.h"
#include "gd_mono_header.h"
#include "gd_mono_marshal.h"
#include "gd_mono_method.h"
#include "gd_mono_utils.h"
#if !defined(JAVASCRIPT_ENABLED)
#define HAVE_METHOD_THUNKS
#endif
#ifdef HAVE_METHOD_THUNKS
template <class... ParamTypes>
struct GDMonoMethodThunk {
typedef void(GD_MONO_STDCALL *M)(ParamTypes... p_args, MonoException **);
M mono_method_thunk;
public:
_FORCE_INLINE_ void invoke(ParamTypes... p_args, MonoException **r_exc) {
GD_MONO_BEGIN_RUNTIME_INVOKE;
mono_method_thunk(p_args..., r_exc);
GD_MONO_END_RUNTIME_INVOKE;
}
_FORCE_INLINE_ bool is_null() {
return mono_method_thunk == NULL;
}
_FORCE_INLINE_ void nullify() {
mono_method_thunk = NULL;
}
_FORCE_INLINE_ void set_from_method(GDMonoMethod *p_mono_method) {
#ifdef DEBUG_ENABLED
CRASH_COND(p_mono_method == NULL);
CRASH_COND(p_mono_method->get_return_type().type_encoding != MONO_TYPE_VOID);
if (p_mono_method->is_static()) {
CRASH_COND(p_mono_method->get_parameters_count() != sizeof...(ParamTypes));
} else {
CRASH_COND(p_mono_method->get_parameters_count() != (sizeof...(ParamTypes) - 1));
}
#endif
mono_method_thunk = (M)mono_method_get_unmanaged_thunk(p_mono_method->get_mono_ptr());
}
GDMonoMethodThunk() :
mono_method_thunk(NULL) {
}
explicit GDMonoMethodThunk(GDMonoMethod *p_mono_method) {
set_from_method(p_mono_method);
}
};
template <class R, class... ParamTypes>
struct GDMonoMethodThunkR {
typedef R(GD_MONO_STDCALL *M)(ParamTypes... p_args, MonoException **);
M mono_method_thunk;
public:
_FORCE_INLINE_ R invoke(ParamTypes... p_args, MonoException **r_exc) {
GD_MONO_BEGIN_RUNTIME_INVOKE;
R r = mono_method_thunk(p_args..., r_exc);
GD_MONO_END_RUNTIME_INVOKE;
return r;
}
_FORCE_INLINE_ bool is_null() {
return mono_method_thunk == NULL;
}
_FORCE_INLINE_ void nullify() {
mono_method_thunk = NULL;
}
_FORCE_INLINE_ void set_from_method(GDMonoMethod *p_mono_method) {
#ifdef DEBUG_ENABLED
CRASH_COND(p_mono_method == NULL);
CRASH_COND(p_mono_method->get_return_type().type_encoding == MONO_TYPE_VOID);
if (p_mono_method->is_static()) {
CRASH_COND(p_mono_method->get_parameters_count() != sizeof...(ParamTypes));
} else {
CRASH_COND(p_mono_method->get_parameters_count() != (sizeof...(ParamTypes) - 1));
}
#endif
mono_method_thunk = (M)mono_method_get_unmanaged_thunk(p_mono_method->get_mono_ptr());
}
GDMonoMethodThunkR() :
mono_method_thunk(NULL) {
}
explicit GDMonoMethodThunkR(GDMonoMethod *p_mono_method) {
#ifdef DEBUG_ENABLED
CRASH_COND(p_mono_method == NULL);
#endif
mono_method_thunk = (M)mono_method_get_unmanaged_thunk(p_mono_method->get_mono_ptr());
}
};
#else
template <unsigned int ThunkParamCount, class P1, class... ParamTypes>
struct VariadicInvokeMonoMethodImpl {
static void invoke(GDMonoMethod *p_mono_method, P1 p_arg1, ParamTypes... p_args, MonoException **r_exc) {
if (p_mono_method->is_static()) {
void *args[ThunkParamCount] = { p_arg1, p_args... };
p_mono_method->invoke_raw(NULL, args, r_exc);
} else {
void *args[ThunkParamCount] = { p_args... };
p_mono_method->invoke_raw((MonoObject *)p_arg1, args, r_exc);
}
}
};
template <unsigned int ThunkParamCount, class... ParamTypes>
struct VariadicInvokeMonoMethod {
static void invoke(GDMonoMethod *p_mono_method, ParamTypes... p_args, MonoException **r_exc) {
VariadicInvokeMonoMethodImpl<ThunkParamCount, ParamTypes...>::invoke(p_mono_method, p_args..., r_exc);
}
};
template <>
struct VariadicInvokeMonoMethod<0> {
static void invoke(GDMonoMethod *p_mono_method, MonoException **r_exc) {
#ifdef DEBUG_ENABLED
CRASH_COND(!p_mono_method->is_static());
#endif
p_mono_method->invoke_raw(NULL, NULL, r_exc);
}
};
template <class P1>
struct VariadicInvokeMonoMethod<1, P1> {
static void invoke(GDMonoMethod *p_mono_method, P1 p_arg1, MonoException **r_exc) {
if (p_mono_method->is_static()) {
void *args[1] = { p_arg1 };
p_mono_method->invoke_raw(NULL, args, r_exc);
} else {
p_mono_method->invoke_raw((MonoObject *)p_arg1, NULL, r_exc);
}
}
};
template <class R>
R unbox_if_needed(MonoObject *p_val, const ManagedType &, typename std::enable_if<!std::is_pointer<R>::value>::type * = 0) {
return GDMonoMarshal::unbox<R>(p_val);
}
template <class R>
R unbox_if_needed(MonoObject *p_val, const ManagedType &p_type, typename std::enable_if<std::is_pointer<R>::value>::type * = 0) {
if (mono_class_is_valuetype(p_type.type_class->get_mono_ptr())) {
return GDMonoMarshal::unbox<R>(p_val);
} else {
// If it's not a value type, we assume 'R' is a pointer to 'MonoObject' or a compatible type, like 'MonoException'.
return (R)p_val;
}
}
template <unsigned int ThunkParamCount, class R, class P1, class... ParamTypes>
struct VariadicInvokeMonoMethodRImpl {
static R invoke(GDMonoMethod *p_mono_method, P1 p_arg1, ParamTypes... p_args, MonoException **r_exc) {
if (p_mono_method->is_static()) {
void *args[ThunkParamCount] = { p_arg1, p_args... };
MonoObject *r = p_mono_method->invoke_raw(NULL, args, r_exc);
return unbox_if_needed<R>(r, p_mono_method->get_return_type());
} else {
void *args[ThunkParamCount] = { p_args... };
MonoObject *r = p_mono_method->invoke_raw((MonoObject *)p_arg1, args, r_exc);
return unbox_if_needed<R>(r, p_mono_method->get_return_type());
}
}
};
template <unsigned int ThunkParamCount, class R, class... ParamTypes>
struct VariadicInvokeMonoMethodR {
static R invoke(GDMonoMethod *p_mono_method, ParamTypes... p_args, MonoException **r_exc) {
return VariadicInvokeMonoMethodRImpl<ThunkParamCount, R, ParamTypes...>::invoke(p_mono_method, p_args..., r_exc);
}
};
template <class R>
struct VariadicInvokeMonoMethodR<0, R> {
static R invoke(GDMonoMethod *p_mono_method, MonoException **r_exc) {
#ifdef DEBUG_ENABLED
CRASH_COND(!p_mono_method->is_static());
#endif
MonoObject *r = p_mono_method->invoke_raw(NULL, NULL, r_exc);
return unbox_if_needed<R>(r, p_mono_method->get_return_type());
}
};
template <class R, class P1>
struct VariadicInvokeMonoMethodR<1, R, P1> {
static R invoke(GDMonoMethod *p_mono_method, P1 p_arg1, MonoException **r_exc) {
if (p_mono_method->is_static()) {
void *args[1] = { p_arg1 };
MonoObject *r = p_mono_method->invoke_raw(NULL, args, r_exc);
return unbox_if_needed<R>(r, p_mono_method->get_return_type());
} else {
MonoObject *r = p_mono_method->invoke_raw((MonoObject *)p_arg1, NULL, r_exc);
return unbox_if_needed<R>(r, p_mono_method->get_return_type());
}
}
};
template <class... ParamTypes>
struct GDMonoMethodThunk {
GDMonoMethod *mono_method;
public:
_FORCE_INLINE_ void invoke(ParamTypes... p_args, MonoException **r_exc) {
VariadicInvokeMonoMethod<sizeof...(ParamTypes), ParamTypes...>::invoke(mono_method, p_args..., r_exc);
}
_FORCE_INLINE_ bool is_null() {
return mono_method == NULL;
}
_FORCE_INLINE_ void nullify() {
mono_method = NULL;
}
_FORCE_INLINE_ void set_from_method(GDMonoMethod *p_mono_method) {
#ifdef DEBUG_ENABLED
CRASH_COND(p_mono_method == NULL);
CRASH_COND(p_mono_method->get_return_type().type_encoding != MONO_TYPE_VOID);
if (p_mono_method->is_static()) {
CRASH_COND(p_mono_method->get_parameters_count() != sizeof...(ParamTypes));
} else {
CRASH_COND(p_mono_method->get_parameters_count() != (sizeof...(ParamTypes) - 1));
}
#endif
mono_method = p_mono_method;
}
GDMonoMethodThunk() :
mono_method(NULL) {
}
explicit GDMonoMethodThunk(GDMonoMethod *p_mono_method) {
set_from_method(p_mono_method);
}
};
template <class R, class... ParamTypes>
struct GDMonoMethodThunkR {
GDMonoMethod *mono_method;
public:
_FORCE_INLINE_ R invoke(ParamTypes... p_args, MonoException **r_exc) {
return VariadicInvokeMonoMethodR<sizeof...(ParamTypes), R, ParamTypes...>::invoke(mono_method, p_args..., r_exc);
}
_FORCE_INLINE_ bool is_null() {
return mono_method == NULL;
}
_FORCE_INLINE_ void nullify() {
mono_method = NULL;
}
_FORCE_INLINE_ void set_from_method(GDMonoMethod *p_mono_method) {
#ifdef DEBUG_ENABLED
CRASH_COND(p_mono_method == NULL);
CRASH_COND(p_mono_method->get_return_type().type_encoding == MONO_TYPE_VOID);
if (p_mono_method->is_static()) {
CRASH_COND(p_mono_method->get_parameters_count() != sizeof...(ParamTypes));
} else {
CRASH_COND(p_mono_method->get_parameters_count() != (sizeof...(ParamTypes) - 1));
}
#endif
mono_method = p_mono_method;
}
GDMonoMethodThunkR() :
mono_method(NULL) {
}
explicit GDMonoMethodThunkR(GDMonoMethod *p_mono_method) {
set_from_method(p_mono_method);
}
};
#endif
#endif // GD_MONO_METHOD_THUNK_H