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/* |
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Copyright (C) 2010 Christian Schoenebeck |
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*/ |
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|
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#include "DynamicLibraries.h" |
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#include "global_private.h" |
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#if defined(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 <errno.h> |
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# include <dirent.h> |
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# include <sys/types.h> |
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# include <sys/stat.h> |
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# include <unistd.h> |
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#endif |
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#include <string.h> |
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#include <iostream> |
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|
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namespace LinuxSampler { |
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|
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/* |
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NOTE: it is expected by the sampler that a reference count is maintained for |
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DLLs, so DLLs can be opened n times, and a DLL shall only be freed from |
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memory after DynamicLibraryClose() was also called n times. Usually this |
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behavior is already implemented on Operating System level. If not, it has to |
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be implemented here for the respective OS ! |
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*/ |
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|
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int DynamicLibrariesSearch(String dir, String funct, DynamicLibrariesSearchCallbackFunction* pCallback, void* pCustom) throw (Exception) { |
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int iLibsLoadedCount = 0; |
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|
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#if defined(WIN32) |
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WIN32_FIND_DATA win32FindData; |
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const String dllpattern = dir + "\\*.dll"; |
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HANDLE hDir = FindFirstFile(dllpattern.c_str(), &win32FindData); |
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if (hDir == INVALID_HANDLE_VALUE) { |
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if (GetLastError() != ERROR_FILE_NOT_FOUND) { |
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throw Exception("library path '" + dir + "' doesn't exist"); |
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} else { |
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return 0; // no file found |
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} |
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} |
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|
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do { |
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// skip directory entries |
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if (win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
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continue; |
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// dir entry name as full qualified path |
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const String sPath = dir + "\\" + win32FindData.cFileName; |
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// load the DLL |
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HINSTANCE hinstLib; |
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void* pDLL = hinstLib = LoadLibrary(sPath.c_str()); |
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if (!pDLL) { |
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std::cerr << "Failed to load DLL: " << sPath << std::endl; |
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continue; |
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} |
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|
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void* pFunct = GetProcAddress(hinstLib, funct.c_str()); |
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if (pFunct == NULL) { |
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std::cerr << "ERROR: unable to find " << funct << "() in " << sPath |
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<< std::endl << std::flush; |
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FreeLibrary(hinstLib); |
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continue; |
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} |
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|
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// call the the supplied callback function to report the found DLL |
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pCallback(sPath, pDLL, pFunct, pCustom); |
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|
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iLibsLoadedCount++; |
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|
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} while (FindNextFile(hDir, &win32FindData)); |
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|
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if (hDir != INVALID_HANDLE_VALUE) FindClose(hDir); |
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|
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#else // POSIX |
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|
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#if defined(__APPLE__) /* 20071224 Toshi Nagata */ |
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if (dir.find("~") == 0) |
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dir.replace(0, 1, getenv("HOME")); |
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#endif |
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DIR* hDir = opendir(dir.c_str()); |
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if (!hDir) { |
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throw Exception("library path '" + dir + "' doesn't exist"); |
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} |
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for (dirent* pEntry = readdir(hDir); pEntry; pEntry = readdir(hDir)) { |
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// dir entry name as full qualified path |
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const String sPath = dir + "/" + pEntry->d_name; |
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// skip entries that are not regular files |
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struct stat entry_stat; |
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if (lstat(sPath.c_str(), &entry_stat) != 0 || |
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(entry_stat.st_mode & S_IFMT) != S_IFREG) |
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continue; |
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// skip files that are not .so files |
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if (sPath.length() < 3 || |
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sPath.substr(sPath.length() - 3) != ".so" && |
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sPath.find(".so.") == String::npos) |
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continue; |
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// load the DLL |
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void* pDLL = dlopen(sPath.c_str(), RTLD_NOW); |
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if (!pDLL) { |
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std::cerr << "failed to load DLL: '" << sPath << "', cause: " |
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<< dlerror() << std::endl; |
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continue; |
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} |
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// load the requested function |
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void* pFunct = dlsym(pDLL, funct.c_str()); |
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char* pcErr = dlerror(); |
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if (pcErr || !pFunct) { |
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std::cerr << "ERROR: unable to find " << funct << "() in '" << sPath |
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<< "'" << std::endl << std::flush; |
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dlclose(pDLL); |
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continue; |
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} |
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|
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// call the the supplied callback function to report the found and |
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// successfully opened DLL |
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pCallback(sPath, pDLL, pFunct, pCustom); |
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|
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iLibsLoadedCount++; |
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} |
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closedir(hDir); |
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#endif |
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|
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return iLibsLoadedCount; |
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} |
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|
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void* DynamicLibraryOpen(String filename) { |
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#if defined(WIN32) |
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return LoadLibrary(filename.c_str()); |
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#else |
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return dlopen(filename.c_str(), RTLD_NOW); |
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#endif |
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} |
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|
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void* DynamicLibraryGetSymbol(void* hDLL, String symbol) { |
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#if defined(WIN32) |
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return GetProcAddress(hDLL, symbol.c_str()); |
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#else |
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return dlsym(hDLL, symbol.c_str()); |
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#endif |
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} |
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|
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void DynamicLibraryClose(void* hDLL) { |
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#if defined(WIN32) |
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FreeLibrary(hDLL); |
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#else |
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dlclose(hDLL); |
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#endif |
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} |
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|
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} // namespace LinuxSampler |
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