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143 lines
4.0 KiB
C++
143 lines
4.0 KiB
C++
//
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// SharedLibrary.h
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//
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// Library: Foundation
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// Package: SharedLibrary
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// Module: SharedLibrary
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//
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// Definition of the SharedLibrary class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_SharedLibrary_INCLUDED
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#define Foundation_SharedLibrary_INCLUDED
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#include "Poco/Foundation.h"
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#if defined(hpux) || defined(_hpux)
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#include "Poco/SharedLibrary_HPUX.h"
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#elif defined(POCO_VXWORKS)
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#include "Poco/SharedLibrary_VX.h"
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#elif defined(POCO_OS_FAMILY_UNIX)
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#include "Poco/SharedLibrary_UNIX.h"
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#elif defined(POCO_OS_FAMILY_WINDOWS)
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#include "Poco/SharedLibrary_WIN32U.h"
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#endif
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namespace Poco {
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class Foundation_API SharedLibrary: private SharedLibraryImpl
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/// The SharedLibrary class dynamically
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/// loads shared libraries at run-time.
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{
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public:
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enum Flags
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{
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SHLIB_GLOBAL = 1,
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/// On platforms that use dlopen(), use RTLD_GLOBAL. This is the default
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/// if no flags are given.
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///
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/// This flag is ignored on platforms that do not use dlopen().
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SHLIB_LOCAL = 2
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/// On platforms that use dlopen(), use RTLD_LOCAL instead of RTLD_GLOBAL.
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///
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/// Note that if this flag is specified, RTTI (including dynamic_cast and throw) will
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/// not work for types defined in the shared library with GCC and possibly other
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/// compilers as well. See http://gcc.gnu.org/faq.html#dso for more information.
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///
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/// This flag is ignored on platforms that do not use dlopen().
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};
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SharedLibrary();
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/// Creates a SharedLibrary object.
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SharedLibrary(const std::string& path);
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/// Creates a SharedLibrary object and loads a library
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/// from the given path.
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SharedLibrary(const std::string& path, int flags);
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/// Creates a SharedLibrary object and loads a library
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/// from the given path, using the given flags.
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/// See the Flags enumeration for valid values.
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virtual ~SharedLibrary();
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/// Destroys the SharedLibrary. The actual library
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/// remains loaded.
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void load(const std::string& path);
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/// Loads a shared library from the given path.
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/// Throws a LibraryAlreadyLoadedException if
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/// a library has already been loaded.
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/// Throws a LibraryLoadException if the library
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/// cannot be loaded.
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void load(const std::string& path, int flags);
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/// Loads a shared library from the given path,
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/// using the given flags. See the Flags enumeration
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/// for valid values.
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/// Throws a LibraryAlreadyLoadedException if
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/// a library has already been loaded.
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/// Throws a LibraryLoadException if the library
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/// cannot be loaded.
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void unload();
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/// Unloads a shared library.
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bool isLoaded() const;
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/// Returns true iff a library has been loaded.
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bool hasSymbol(const std::string& name);
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/// Returns true iff the loaded library contains
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/// a symbol with the given name.
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void* getSymbol(const std::string& name);
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/// Returns the address of the symbol with
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/// the given name. For functions, this
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/// is the entry point of the function.
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/// Throws a NotFoundException if the symbol
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/// does not exist.
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const std::string& getPath() const;
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/// Returns the path of the library, as
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/// specified in a call to load() or the
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/// constructor.
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static std::string suffix();
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/// Returns the platform-specific filename suffix
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/// for shared libraries (including the period).
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/// In debug mode, the suffix also includes a
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/// "d" to specify the debug version of a library
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/// (e.g., "d.so", "d.dll") unless the library has
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/// been compiled with -DPOCO_NO_SHARED_LIBRARY_DEBUG_SUFFIX.
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static bool setSearchPath(const std::string& path);
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/// Adds the given path to the list of paths shared libraries
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/// are searched in.
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///
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/// Returns true if the path was set, otherwise false.
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///
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/// Currently only supported on Windows, where it calls
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/// SetDllDirectory(). On all other platforms, does not
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/// do anything and returns false.
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private:
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SharedLibrary(const SharedLibrary&);
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SharedLibrary& operator = (const SharedLibrary&);
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};
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} // namespace Poco
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#endif // Foundation_SharedLibrary_INCLUDED
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