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109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
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/*
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* mptLibrary.h
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* ------------
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* Purpose: Shared library handling.
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "openmpt/all/BuildSettings.hpp"
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OPENMPT_NAMESPACE_BEGIN
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namespace mpt
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{
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typedef void* (*FuncPtr)(); // pointer to function returning void*
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class LibraryHandle;
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enum class LibrarySearchPath
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{
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Invalid,
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Default,
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Application,
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System,
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FullPath,
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};
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class LibraryPath
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{
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private:
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mpt::LibrarySearchPath searchPath;
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mpt::PathString fileName;
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private:
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LibraryPath(mpt::LibrarySearchPath searchPath, const mpt::PathString &fileName);
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public:
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mpt::LibrarySearchPath GetSearchPath() const;
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mpt::PathString GetFileName() const;
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public:
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// "lib" on Unix-like systems, "" on Windows
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static mpt::PathString GetDefaultPrefix();
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// ".so" or ".dylib" or ".dll"
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static mpt::PathString GetDefaultSuffix();
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// Returns the library path in the application directory, with os-specific prefix and suffix added to basename.
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// e.g.: basename = "unmo3" --> "libunmo3.so" / "apppath/unmo3.dll"
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static LibraryPath App(const mpt::PathString &basename);
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// Returns the library path in the application directory, with os-specific suffix added to fullname.
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// e.g.: fullname = "libunmo3" --> "libunmo3.so" / "apppath/libunmo3.dll"
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static LibraryPath AppFullName(const mpt::PathString &fullname);
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// Returns a system library name with os-specific prefix and suffix added to basename, but without any full path in order to be searched in the default search path.
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// e.g.: basename = "unmo3" --> "libunmo3.so" / "unmo3.dll"
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static LibraryPath System(const mpt::PathString &basename);
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// Returns a system library name with os-specific suffix added to path.
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// e.g.: path = "somepath/foo" --> "somepath/foo.so" / "somepath/foo.dll"
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static LibraryPath FullPath(const mpt::PathString &path);
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};
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class Library
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{
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protected:
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std::shared_ptr<LibraryHandle> m_Handle;
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public:
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Library();
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Library(const mpt::LibraryPath &path);
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public:
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void Unload();
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bool IsValid() const;
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FuncPtr GetProcAddress(const std::string &symbol) const;
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template <typename Tfunc>
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bool Bind(Tfunc * & f, const std::string &symbol) const
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{
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#if !(MPT_OS_WINDOWS && MPT_COMPILER_GCC)
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// MinGW64 std::is_function is always false for non __cdecl functions.
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// See https://connect.microsoft.com/VisualStudio/feedback/details/774720/stl-is-function-bug .
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static_assert(std::is_function<Tfunc>::value);
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#endif
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const FuncPtr addr = GetProcAddress(symbol);
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f = reinterpret_cast<Tfunc*>(addr);
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return (addr != nullptr);
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}
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};
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} // namespace mpt
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OPENMPT_NAMESPACE_END
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