1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// license:BSD-3-Clause
// copyright-holders:Vas Crabb
/***************************************************************************
mfpresolve.h
Helpers for resolving member function pointers to entry points.
***************************************************************************/
#ifndef MAME_LIB_UTIL_MFPRESOLVE_H
#define MAME_LIB_UTIL_MFPRESOLVE_H
#pragma once
#include "abi.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <utility>
namespace util {
namespace detail {
std::pair<std::uintptr_t, std::uintptr_t> resolve_member_function_itanium(std::uintptr_t function, std::ptrdiff_t delta, void const *object) noexcept;
std::pair<std::uintptr_t, std::uintptr_t> resolve_member_function_msvc(void const *funcptr, std::size_t size, void const *object) noexcept;
std::uintptr_t bypass_member_function_thunks(std::uintptr_t entrypoint, void const *object) noexcept;
} // namespace detail
template <typename T, typename U>
inline T bypass_member_function_thunks(T entrypoint, U const *object) noexcept
{
return reinterpret_cast<T>(
detail::bypass_member_function_thunks(
reinterpret_cast<std::uintptr_t>(entrypoint),
reinterpret_cast<void const *>(object)));
}
template <typename T, typename Ret, typename... Params>
inline std::pair<std::uintptr_t, std::uintptr_t> resolve_member_function(Ret (T::*function)(Params...), T &object) noexcept
{
if (MAME_ABI_CXX_TYPE == MAME_ABI_CXX_ITANIUM)
{
struct { std::uintptr_t ptr; std::ptrdiff_t adj; } equiv;
assert(sizeof(function) == sizeof(equiv));
*reinterpret_cast<decltype(function) *>(&equiv) = function;
return detail::resolve_member_function_itanium(equiv.ptr, equiv.adj, &object);
}
else if (MAME_ABI_CXX_TYPE == MAME_ABI_CXX_MSVC)
{
return detail::resolve_member_function_msvc(&function, sizeof(function), &object);
}
else
{
return std::make_pair(std::uintptr_t(nullptr), std::uintptr_t(nullptr));
}
}
template <typename T, typename Ret, typename... Params>
inline std::pair<std::uintptr_t, std::uintptr_t> resolve_member_function(Ret (T::*function)(Params...) const, T const &object) noexcept
{
if (MAME_ABI_CXX_TYPE == MAME_ABI_CXX_ITANIUM)
{
struct { std::uintptr_t ptr; std::ptrdiff_t adj; } equiv;
assert(sizeof(function) == sizeof(equiv));
*reinterpret_cast<decltype(function) *>(&equiv) = function;
return detail::resolve_member_function_itanium(equiv.ptr, equiv.adj, &object);
}
else if (MAME_ABI_CXX_TYPE == MAME_ABI_CXX_MSVC)
{
return detail::resolve_member_function_msvc(&function, sizeof(function), &object);
}
else
{
return std::make_pair(std::uintptr_t(nullptr), std::uintptr_t(nullptr));
}
}
} // namespace util
#endif // MAME_LIB_UTIL_MFPRESOLVE_H
|