mirror of https://github.com/OpenRCT2/OpenRCT2.git
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 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 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#ifndef _COMMON_H_
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#define _COMMON_H_
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#include "diagnostic.h"
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#include "rct2.h"
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#define SafeFree(x) do { free(x); (x) = NULL; } while (0)
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#define SafeDelete(x) do { delete (x); (x) = nullptr; } while (0)
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#define SafeDeleteArray(x) do { delete[] (x); (x) = nullptr; } while (0)
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#ifndef interface
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#define interface struct
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#endif
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#define abstract = 0
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#if defined(__i386__) || defined(_M_IX86)
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#define PLATFORM_X86
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#else
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#define NO_RCT2 1
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#endif
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#if defined(__LP64__) || defined(_WIN64)
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#define PLATFORM_64BIT
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#else
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#define PLATFORM_32BIT
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#endif
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// C99's restrict keywords guarantees the pointer in question, for the whole of its lifetime,
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// will be the only way to access a given memory region. In other words: there is no other pointer
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// aliasing the same memory area. Using it lets compiler generate better code. If your compiler
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// does not support it, feel free to drop it, at some performance hit.
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#ifdef __cplusplus
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#ifdef _MSC_VER
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#define RESTRICT __restrict
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#else
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#define RESTRICT __restrict__
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#endif
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#else
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#ifdef _MSC_VER
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#define RESTRICT __restrict
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#else
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#define RESTRICT restrict
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#endif
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#endif
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#ifndef RESTRICT
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#define RESTRICT
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#endif
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#ifdef __cplusplus
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#define assert_struct_size(x, y) static_assert(sizeof(x) == (y), "Improper struct size")
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#else
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// Visual Studio does not know _Static_assert
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#if !defined(_MSC_VER)
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#define assert_struct_size(x, y) _Static_assert(sizeof(x) == (y), "Improper struct size")
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#else
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#define assert_struct_size(x, y)
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#endif // !defined(_MSC_VER)
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#endif
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#ifdef PLATFORM_X86
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#ifndef FASTCALL
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#ifdef __GNUC__
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#define FASTCALL __attribute__((fastcall))
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#elif defined(_MSC_VER)
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#define FASTCALL __fastcall
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#else
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#pragma message "Not using fastcall calling convention, please check your compiler support"
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#define FASTCALL
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#endif
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#endif // FASTCALL
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#else // PLATFORM_X86
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#define FASTCALL
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#endif // PLATFORM_X86
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/**
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* x86 register structure, only used for easy interop to RCT2 code.
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*/
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#pragma pack(push, 1)
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typedef struct registers {
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union {
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int eax;
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short ax;
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struct {
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char al;
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char ah;
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};
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};
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union {
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int ebx;
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short bx;
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struct {
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char bl;
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char bh;
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};
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};
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union {
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int ecx;
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short cx;
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struct {
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char cl;
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char ch;
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};
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};
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union {
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int edx;
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short dx;
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struct {
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char dl;
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char dh;
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};
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};
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union {
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int esi;
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short si;
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};
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union {
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int edi;
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short di;
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};
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union {
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int ebp;
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short bp;
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};
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} registers;
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assert_struct_size(registers, 7 * 4);
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#pragma pack(pop)
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#define UNUSED(x) ((void)(x))
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#endif
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