bsnes/nall/dl.hpp

127 lines
3.5 KiB
C++
Executable File

#pragma once
//dynamic linking support
#include <nall/intrinsics.hpp>
#include <nall/path.hpp>
#include <nall/stdint.hpp>
#include <nall/string.hpp>
#include <nall/utility.hpp>
#if defined(PLATFORM_WINDOWS)
#include <nall/windows/utf8.hpp>
#else
#include <dlfcn.h>
#endif
namespace nall {
struct library {
library() = default;
~library() { close(); }
library& operator=(const library&) = delete;
library(const library&) = delete;
explicit operator bool() const { return open(); }
auto open() const -> bool { return handle; }
auto open(const string&, const string& = "") -> bool;
auto openAbsolute(const string&) -> bool;
auto sym(const string&) -> void*;
auto close() -> void;
private:
uintptr handle = 0;
};
#if defined(PLATFORM_LINUX) || defined(PLATFORM_BSD)
inline auto library::open(const string& name, const string& path) -> bool {
if(handle) close();
if(path) handle = (uintptr)dlopen(string(path, "lib", name, ".so"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string(Path::user(), ".local/lib/lib", name, ".so"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string("/usr/local/lib/lib", name, ".so"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string("lib", name, ".so"), RTLD_LAZY);
return handle;
}
inline auto library::openAbsolute(const string& name) -> bool {
if(handle) close();
handle = (uintptr)dlopen(name, RTLD_LAZY);
return handle;
}
inline auto library::sym(const string& name) -> void* {
if(!handle) return nullptr;
return dlsym((void*)handle, name);
}
inline auto library::close() -> void {
if(!handle) return;
dlclose((void*)handle);
handle = 0;
}
#elif defined(PLATFORM_MACOS)
inline auto library::open(const string& name, const string& path) -> bool {
if(handle) close();
if(path) handle = (uintptr)dlopen(string(path, "lib", name, ".dylib"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string(Path::user(), ".local/lib/lib", name, ".dylib"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string("/usr/local/lib/lib", name, ".dylib"), RTLD_LAZY);
if(!handle) handle = (uintptr)dlopen(string("lib", name, ".dylib"), RTLD_LAZY);
return handle;
}
inline auto library::openAbsolute(const string& name) -> bool {
if(handle) close();
handle = (uintptr)dlopen(name, RTLD_LAZY);
return handle;
}
inline auto library::sym(const string& name) -> void* {
if(!handle) return nullptr;
return dlsym((void*)handle, name);
}
inline auto library::close() -> void {
if(!handle) return;
dlclose((void*)handle);
handle = 0;
}
#elif defined(PLATFORM_WINDOWS)
inline auto library::open(const string& name, const string& path) -> bool {
if(handle) close();
if(path) {
string filepath = {path, name, ".dll"};
handle = (uintptr)LoadLibraryW(utf16_t(filepath));
}
if(!handle) {
string filepath = {name, ".dll"};
handle = (uintptr)LoadLibraryW(utf16_t(filepath));
}
return handle;
}
inline auto library::openAbsolute(const string& name) -> bool {
if(handle) close();
handle = (uintptr)LoadLibraryW(utf16_t(name));
return handle;
}
inline auto library::sym(const string& name) -> void* {
if(!handle) return nullptr;
return (void*)GetProcAddress((HMODULE)handle, name);
}
inline auto library::close() -> void {
if(!handle) return;
FreeLibrary((HMODULE)handle);
handle = 0;
}
#else
inline auto library::open(const string&, const string&) -> bool { return false; }
inline auto library::openAbsolute(const string&) -> bool { return false; }
inline auto library::sym(const string&) -> void* { return nullptr; }
inline auto library::close() -> void {}
#endif
}