mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
140 lines
4.1 KiB
C++
140 lines
4.1 KiB
C++
//
|
|
// SharedLibrary.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: SharedLibrary
|
|
// Module: SharedLibrary
|
|
//
|
|
// Definition of the SharedLibrary class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_SharedLibrary_INCLUDED
|
|
#define Foundation_SharedLibrary_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
|
|
|
|
#if defined(hpux) || defined(_hpux)
|
|
# include "Poco/SharedLibrary_HPUX.h"
|
|
#elif defined(POCO_OS_FAMILY_UNIX)
|
|
# include "Poco/SharedLibrary_UNIX.h"
|
|
#endif
|
|
|
|
|
|
namespace Poco
|
|
{
|
|
|
|
|
|
class Foundation_API SharedLibrary : private SharedLibraryImpl
|
|
/// The SharedLibrary class dynamically
|
|
/// loads shared libraries at run-time.
|
|
{
|
|
public:
|
|
enum Flags
|
|
{
|
|
SHLIB_GLOBAL = 1,
|
|
/// On platforms that use dlopen(), use RTLD_GLOBAL. This is the default
|
|
/// if no flags are given.
|
|
///
|
|
/// This flag is ignored on platforms that do not use dlopen().
|
|
|
|
SHLIB_LOCAL = 2
|
|
/// On platforms that use dlopen(), use RTLD_LOCAL instead of RTLD_GLOBAL.
|
|
///
|
|
/// Note that if this flag is specified, RTTI (including dynamic_cast and throw) will
|
|
/// not work for types defined in the shared library with GCC and possibly other
|
|
/// compilers as well. See http://gcc.gnu.org/faq.html#dso for more information.
|
|
///
|
|
/// This flag is ignored on platforms that do not use dlopen().
|
|
};
|
|
|
|
SharedLibrary();
|
|
/// Creates a SharedLibrary object.
|
|
|
|
SharedLibrary(const std::string & path);
|
|
/// Creates a SharedLibrary object and loads a library
|
|
/// from the given path.
|
|
|
|
SharedLibrary(const std::string & path, int flags);
|
|
/// Creates a SharedLibrary object and loads a library
|
|
/// from the given path, using the given flags.
|
|
/// See the Flags enumeration for valid values.
|
|
|
|
virtual ~SharedLibrary();
|
|
/// Destroys the SharedLibrary. The actual library
|
|
/// remains loaded.
|
|
|
|
void load(const std::string & path);
|
|
/// Loads a shared library from the given path.
|
|
/// Throws a LibraryAlreadyLoadedException if
|
|
/// a library has already been loaded.
|
|
/// Throws a LibraryLoadException if the library
|
|
/// cannot be loaded.
|
|
|
|
void load(const std::string & path, int flags);
|
|
/// Loads a shared library from the given path,
|
|
/// using the given flags. See the Flags enumeration
|
|
/// for valid values.
|
|
/// Throws a LibraryAlreadyLoadedException if
|
|
/// a library has already been loaded.
|
|
/// Throws a LibraryLoadException if the library
|
|
/// cannot be loaded.
|
|
|
|
void unload();
|
|
/// Unloads a shared library.
|
|
|
|
bool isLoaded() const;
|
|
/// Returns true iff a library has been loaded.
|
|
|
|
bool hasSymbol(const std::string & name);
|
|
/// Returns true iff the loaded library contains
|
|
/// a symbol with the given name.
|
|
|
|
void * getSymbol(const std::string & name);
|
|
/// Returns the address of the symbol with
|
|
/// the given name. For functions, this
|
|
/// is the entry point of the function.
|
|
/// Throws a NotFoundException if the symbol
|
|
/// does not exist.
|
|
|
|
const std::string & getPath() const;
|
|
/// Returns the path of the library, as
|
|
/// specified in a call to load() or the
|
|
/// constructor.
|
|
|
|
static std::string suffix();
|
|
/// Returns the platform-specific filename suffix
|
|
/// for shared libraries (including the period).
|
|
/// In debug mode, the suffix also includes a
|
|
/// "d" to specify the debug version of a library
|
|
/// (e.g., "d.so", "d.dll") unless the library has
|
|
/// been compiled with -DPOCO_NO_SHARED_LIBRARY_DEBUG_SUFFIX.
|
|
|
|
static bool setSearchPath(const std::string & path);
|
|
/// Adds the given path to the list of paths shared libraries
|
|
/// are searched in.
|
|
///
|
|
/// Returns true if the path was set, otherwise false.
|
|
///
|
|
/// Currently only supported on Windows, where it calls
|
|
/// SetDllDirectory(). On all other platforms, does not
|
|
/// do anything and returns false.
|
|
|
|
private:
|
|
SharedLibrary(const SharedLibrary &);
|
|
SharedLibrary & operator=(const SharedLibrary &);
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_SharedLibrary_INCLUDED
|