157 lines
3.9 KiB
C++
157 lines
3.9 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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// This program 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, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include <string.h>
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#include <stdio.h>
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#endif
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#include "Common.h"
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#include "FileUtil.h"
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#include "StringUtil.h"
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#include "DynamicLibrary.h"
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DynamicLibrary::DynamicLibrary()
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{
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library = 0;
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}
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std::string GetLastErrorAsString()
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{
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#ifdef _WIN32
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LPVOID lpMsgBuf = 0;
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DWORD error = GetLastError();
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FormatMessage(
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FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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error,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
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(LPTSTR) &lpMsgBuf,
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0, NULL);
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std::string s;
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if (lpMsgBuf)
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{
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s = ((char *)lpMsgBuf);
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LocalFree(lpMsgBuf);
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} else {
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s = StringFromFormat("(unknown error %08x)", error);
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}
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return s;
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#else
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static std::string errstr;
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char *tmp = dlerror();
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if (tmp)
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errstr = tmp;
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return errstr;
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#endif
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}
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// Loading means loading the dll with LoadLibrary() to get an instance to the dll.
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// This is done when Dolphin is started to determine which dlls are good, and
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// before opening the Config and Debugging windows from Plugin.cpp and
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// before opening the dll for running the emulation in Video_...cpp in Core.
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// Since this is fairly slow, TODO: think about implementing some sort of cache.
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int DynamicLibrary::Load(const char* filename)
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{
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if (!filename || strlen(filename) == 0)
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{
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LOG(MASTER_LOG, "Missing filename of dynamic library to load");
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PanicAlert("Missing filename of dynamic library to load");
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return 0;
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}
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LOG(MASTER_LOG, "Trying to load library %s", filename);
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if (IsLoaded())
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{
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LOG(MASTER_LOG, "Trying to load already loaded library %s", filename);
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return 2;
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}
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#ifdef _WIN32
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library = LoadLibrary(filename);
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#else
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library = dlopen(filename, RTLD_NOW | RTLD_LOCAL);
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#endif
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if (!library)
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{
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LOG(MASTER_LOG, "Error loading DLL %s: %s", filename, GetLastErrorAsString().c_str());
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if (File::Exists(filename))
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{
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PanicAlert("Error loading DLL %s: %s\n\nAre you missing SDL.DLL or another file that this plugin may depend on?", filename, GetLastErrorAsString().c_str());
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}
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else
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{
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PanicAlert("Error loading DLL %s: %s\n", filename, GetLastErrorAsString().c_str());
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}
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return 0;
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}
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library_file = filename;
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return 1;
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}
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int DynamicLibrary::Unload()
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{
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int retval;
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if (!IsLoaded()) {
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PanicAlert("Error unloading DLL %s: not loaded", library_file.c_str());
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return 0;
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}
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#ifdef _WIN32
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retval = FreeLibrary(library);
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#else
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retval = dlclose(library)?0:1;
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#endif
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if (!retval) {
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PanicAlert("Error unloading DLL %s: %s", library_file.c_str(),
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GetLastErrorAsString().c_str());
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}
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library = 0;
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return retval;
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}
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void* DynamicLibrary::Get(const char* funcname) const
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{
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void* retval;
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if (!library)
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{
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PanicAlert("Can't find function %s - Library not loaded.");
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return NULL;
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}
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#ifdef _WIN32
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retval = GetProcAddress(library, funcname);
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#else
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retval = dlsym(library, funcname);
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#endif
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if (!retval) {
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LOG(MASTER_LOG, "Symbol %s missing in %s (error: %s)\n", funcname, library_file.c_str(), GetLastErrorAsString().c_str());
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PanicAlert("Symbol %s missing in %s (error: %s)\n", funcname, library_file.c_str(), GetLastErrorAsString().c_str());
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}
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return retval;
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}
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