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https://github.com/bsnes-emu/bsnes.git
synced 2025-02-23 14:42:33 +01:00
83f684c66c
byuu says: Note: for Windows users, please go to nall/intrinsics.hpp line 60 and correct the typo from "DISPLAY_WINDOW" to "DISPLAY_WINDOWS" before compiling, otherwise things won't work at all. This will be a really major WIP for the core SNES emulation, so please test as thoroughly as possible. I rewrote the 65816 CPU core's dispatcher from a jump table to a switch table. This was so that I could pass class variables as parameters to opcodes without crazy theatrics. With that, I killed the regs.r[N] stuff, the flag_t operator|=, &=, ^= stuff, and all of the template versions of opcodes. I also removed some stupid pointless flag tests in xcn and pflag that would always be true. I sure hope that AWJ is happy with this; because this change was so that my flag assignments and branch tests won't need to build regs.P into a full 8-bit variable anymore. It does of course incur a slight performance hit when you pass in variables by-value to functions, but it should help with binary size (and thus cache) by reducing a lot of extra functions. (I know I could have used template parameters for some things even with a switch table, but chose not to for the aforementioned reasons.) Overall, it's about a ~1% speedup from the previous build. The CPU core instructions were never a bottleneck, but I did want to fix the P flag building stuff because that really was a dumb mistake v_v'
130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
#ifndef NALL_DL_HPP
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#define NALL_DL_HPP
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//dynamic linking support
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#include <nall/intrinsics.hpp>
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#include <nall/stdint.hpp>
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#include <nall/string.hpp>
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#include <nall/utility.hpp>
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#if defined(PLATFORM_WINDOWS)
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#include <windows.h>
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#include <nall/windows/utf8.hpp>
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#else
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#include <dlfcn.h>
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#endif
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namespace nall {
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struct library {
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explicit operator bool() const { return open(); }
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bool open() const { return handle; }
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bool open(const string&, const string& = "");
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bool open_absolute(const string&);
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void* sym(const string&);
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void close();
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library() = default;
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~library() { close(); }
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library& operator=(const library&) = delete;
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library(const library&) = delete;
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private:
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uintptr_t handle = 0;
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};
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#if defined(PLATFORM_LINUX) || defined(PLATFORM_BSD)
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inline bool library::open(const string& name, const string& path) {
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if(handle) close();
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if(path) handle = (uintptr_t)dlopen(string(path, "lib", name, ".so"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string(userpath(), ".local/lib/lib", name, ".so"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string("/usr/local/lib/lib", name, ".so"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string("lib", name, ".so"), RTLD_LAZY);
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return handle;
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}
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inline bool library::open_absolute(const string& name) {
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if(handle) close();
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handle = (uintptr_t)dlopen(name, RTLD_LAZY);
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return handle;
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}
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inline void* library::sym(const string& name) {
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if(!handle) return nullptr;
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return dlsym((void*)handle, name);
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}
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inline void library::close() {
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if(!handle) return;
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dlclose((void*)handle);
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handle = 0;
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}
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#elif defined(PLATFORM_MACOSX)
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inline bool library::open(const string& name, const string& path) {
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if(handle) close();
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if(path) handle = (uintptr_t)dlopen(string(path, "lib", name, ".dylib"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string(userpath(), ".local/lib/lib", name, ".dylib"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string("/usr/local/lib/lib", name, ".dylib"), RTLD_LAZY);
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if(!handle) handle = (uintptr_t)dlopen(string("lib", name, ".dylib"), RTLD_LAZY);
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return handle;
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}
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inline bool library::open_absolute(const string& name) {
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if(handle) close();
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handle = (uintptr_t)dlopen(name, RTLD_LAZY);
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return handle;
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}
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inline void* library::sym(const string& name) {
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if(!handle) return nullptr;
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return dlsym((void*)handle, name);
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}
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inline void library::close() {
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if(!handle) return;
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dlclose((void*)handle);
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handle = 0;
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}
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#elif defined(PLATFORM_WINDOWS)
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inline bool library::open(const string& name, const string& path) {
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if(handle) close();
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if(path) {
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string filepath = {path, name, ".dll"};
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handle = (uintptr_t)LoadLibraryW(utf16_t(filepath));
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}
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if(!handle) {
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string filepath = {name, ".dll"};
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handle = (uintptr_t)LoadLibraryW(utf16_t(filepath));
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}
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return handle;
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}
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inline bool library::open_absolute(const string& name) {
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if(handle) close();
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handle = (uintptr_t)LoadLibraryW(utf16_t(name));
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return handle;
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}
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inline void* library::sym(const string& name) {
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if(!handle) return nullptr;
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return (void*)GetProcAddress((HMODULE)handle, name);
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}
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inline void library::close() {
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if(!handle) return;
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FreeLibrary((HMODULE)handle);
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handle = 0;
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}
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#else
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inline bool library::open(const string&, const string&) { return false; }
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inline bool library::open_absolute(const string&) { return false; }
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inline void* library::sym(const string&) { return nullptr; }
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inline void library::close() {}
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#endif
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}
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#endif
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