bsnes/nall/dl.hpp

130 lines
3.4 KiB
C++

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