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// **********************************************************************
//
// Copyright (c) 2003-2016 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <Ice/DynamicLibrary.h>
#include <IceUtil/StringUtil.h>
#include <IceUtil/StringConverter.h>
#ifndef _WIN32
# include <dlfcn.h>
#endif
using namespace Ice;
using namespace IceInternal;
using namespace std;
IceUtil::Shared* IceInternal::upCast(DynamicLibrary* p) { return p; }
IceUtil::Shared* IceInternal::upCast(DynamicLibraryList* p) { return p; }
IceInternal::DynamicLibrary::DynamicLibrary() :
_hnd(0)
{
}
IceInternal::DynamicLibrary::~DynamicLibrary()
{
/*
* Closing the library here can cause a crash at program exit if
* the application holds references to library resources in global
* or static variables. Instead, we let the process discard the
* library.
*
if(_hnd != 0)
{
#ifdef _WIN32
FreeLibrary(_hnd);
#else
dlclose(_hnd);
#endif
}
*/
}
IceInternal::DynamicLibrary::symbol_type
IceInternal::DynamicLibrary::loadEntryPoint(const string& entryPoint, bool useIceVersion)
{
string::size_type colon = entryPoint.rfind(':');
#ifdef _WIN32
const string driveLetters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
if(colon == 1 && driveLetters.find(entryPoint[0]) != string::npos &&
(entryPoint[2] == '\\' || entryPoint[2] == '/'))
{
//
// The only colon we found is in the drive specification, as in "C:\MyDir".
// This means the function name is missing.
//
colon = string::npos;
}
#endif
if(colon == string::npos || colon == entryPoint.size() - 1)
{
_err = "invalid entry point format `" + entryPoint + "'";
return 0;
}
string libSpec = entryPoint.substr(0, colon);
string funcName = entryPoint.substr(colon + 1);
string libPath, libName, version, debug;
#ifdef _WIN32
string::size_type separator = libSpec.find_last_of("/\\");
#else
string::size_type separator = libSpec.rfind('/');
#endif
if(separator != string::npos)
{
libPath = libSpec.substr(0, separator + 1);
libSpec = libSpec.substr(separator + 1);
}
string::size_type comma = libSpec.find(',');
if(comma == string::npos)
{
libName = libSpec;
# if defined(ICE_CPP11_MAPPING) && !defined(_WIN32)
libName += "++11";
# endif
if(useIceVersion)
{
int majorVersion = (ICE_INT_VERSION / 10000);
int minorVersion = (ICE_INT_VERSION / 100) - majorVersion * 100;
ostringstream os;
os << majorVersion * 10 + minorVersion;
int patchVersion = ICE_INT_VERSION % 100;
if(patchVersion > 50)
{
os << 'b';
if(patchVersion >= 52)
{
os << (patchVersion - 50);
}
}
version = os.str();
}
}
else
{
if(comma == libSpec.size() - 1)
{
_err = "invalid entry point format `" + entryPoint + "'";
return 0;
}
libName = libSpec.substr(0, comma);
# if defined(ICE_CPP11_MAPPING) && !defined(_WIN32)
libName += "++11";
# endif
version = libSpec.substr(comma + 1);
}
string lib = libPath;
#ifdef _WIN32
lib += libName;
lib += version;
# ifdef ICE_OS_WINRT
lib += "uwp";
# endif
# ifdef ICE_CPP11_MAPPING
lib += "++11";
# endif
# if defined(_DEBUG) && !defined(__MINGW32__)
lib += 'd';
# endif
# ifdef COMPSUFFIX
lib += COMPSUFFIX;
# endif
lib += ".dll";
#elif defined(__APPLE__)
lib += "lib" + libName;
if(!version.empty())
{
lib += "." + version;
}
#elif defined(__hpux)
lib += "lib" + libName;
if(!version.empty())
{
lib += "." + version;
}
else
{
lib += ".sl";
}
#elif defined(_AIX)
lib += "lib" + libName + ".a(lib" + libName + ".so";
if(!version.empty())
{
lib += "." + version;
}
lib += ")";
#else
lib += "lib" + libName + ".so";
if(!version.empty())
{
lib += "." + version;
}
#endif
#ifdef __APPLE__
//
// On OS X fallback to .so and .bundle extensions, if the default
// .dylib fails.
//
if(!load(lib + ".dylib"))
{
string errMsg = _err;
if(!load(lib + ".so"))
{
errMsg += "; " + _err;
if(!load(lib + ".bundle"))
{
_err = errMsg + "; " + _err;
return 0;
}
}
_err = "";
}
#else
if(!load(lib))
{
return 0;
}
#endif
return getSymbol(funcName);
}
bool
IceInternal::DynamicLibrary::load(const string& lib)
{
//
// Don't need to use a wide string converter as the wide string is passed
// to Windows API.
//
#ifdef ICE_OS_WINRT
_hnd = LoadPackagedLibrary(IceUtil::stringToWstring(lib, IceUtil::getProcessStringConverter()).c_str(), 0);
#elif defined(_WIN32)
_hnd = LoadLibraryW(IceUtil::stringToWstring(lib, IceUtil::getProcessStringConverter()).c_str());
#else
int flags = RTLD_NOW | RTLD_GLOBAL;
#ifdef _AIX
flags |= RTLD_MEMBER;
#endif
_hnd = dlopen(lib.c_str(), flags);
#endif
if(_hnd == 0)
{
//
// Remember the most recent error in _err.
//
#ifdef _WIN32
_err = IceUtilInternal::lastErrorToString();
#else
const char* err = dlerror();
if(err)
{
_err = err;
}
#endif
}
return _hnd != 0;
}
IceInternal::DynamicLibrary::symbol_type
IceInternal::DynamicLibrary::getSymbol(const string& name)
{
assert(_hnd != 0);
#ifdef _WIN32
symbol_type result = GetProcAddress(_hnd, name.c_str());
#else
symbol_type result = dlsym(_hnd, name.c_str());
#endif
if(result == 0)
{
//
// Remember the most recent error in _err.
//
#ifdef _WIN32
_err = IceUtilInternal::lastErrorToString();
#else
const char* err = dlerror();
if(err)
{
_err = err;
}
#endif
}
return result;
}
const string&
IceInternal::DynamicLibrary::getErrorMessage() const
{
return _err;
}
void
IceInternal::DynamicLibraryList::add(const DynamicLibraryPtr& library)
{
_libraries.push_back(library);
}
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