LibraryLoader Class Reference

Data Structures
class	Function
	A function loaded from a library. More...

Public Member Functions
	LibraryLoader (const std::string &filename)
	Load a library with the given filename.
	~LibraryLoader ()
	Close the library.
bool	HasError ()
	Check whether an error occurred while loading the library or a function.
std::string	GetLastError ()
	Get the last error that occurred while loading the library or a function.
Function	GetFunction (const std::string &symbol_name)
	Get a function from a loaded library.

Private Member Functions
void *	OpenLibrary (const std::string &filename)
	Open the library with the given filename.
void	CloseLibrary ()
	Close the library.
void *	GetSymbol (const std::string &symbol_name)
	Get a symbol from the library.

Private Attributes
std::optional< std::string >	error = {}
	The last error that occurred, if set.
void *	handle = nullptr
	Handle to the library.

Detailed Description

Definition at line 13 of file library_loader.h.

Constructor & Destructor Documentation

LibraryLoader()

LibraryLoader::LibraryLoader ( const std::string &  filename )

inlineexplicit

Load a library with the given filename.

Definition at line 37 of file library_loader.h.

References handle, and OpenLibrary().

~LibraryLoader()

LibraryLoader::~LibraryLoader ( )

inline

Close the library.

Definition at line 45 of file library_loader.h.

References CloseLibrary(), and handle.

Member Function Documentation

CloseLibrary()

void LibraryLoader::CloseLibrary ( )

private

Close the library.

Definition at line 49 of file library_loader_unix.cpp.

References handle.

Referenced by ~LibraryLoader().

GetFunction()

Function LibraryLoader::GetFunction ( const std::string &  symbol_name )

inline

Get a function from a loaded library.

Parameters

symbol_name

The name of the function to get.

Returns

The function. Check HasError() before using.

Definition at line 78 of file library_loader.h.

References error, and GetSymbol().

Referenced by VideoDriver_Win32Base::GetDPIScale(), and Win32StringContains().

GetLastError()

std::string LibraryLoader::GetLastError ( )

inline

Get the last error that occurred while loading the library or a function.

Returns

The error message.

Definition at line 67 of file library_loader.h.

References error.

GetSymbol()

void * LibraryLoader::GetSymbol ( const std::string &  symbol_name )

private

Get a symbol from the library.

Should set error if any error occurred.

Parameters

symbol_name

The name of the symbol to get.

Definition at line 54 of file library_loader_unix.cpp.

References error, and handle.

Referenced by GetFunction().

HasError()

bool LibraryLoader::HasError ( )

inline

Check whether an error occurred while loading the library or a function.

Returns

Whether an error occurred.

Definition at line 57 of file library_loader.h.

References error.

OpenLibrary()

void * LibraryLoader::OpenLibrary ( const std::string &  filename )

private

Open the library with the given filename.

Should set error if any error occurred.

Parameters

filename

The filename of the library to open.

Definition at line 39 of file library_loader_unix.cpp.

References error.

Referenced by LibraryLoader().

Field Documentation

error

std::optional<std::string> LibraryLoader::error = {}

private

The last error that occurred, if set.

Definition at line 108 of file library_loader.h.

Referenced by GetFunction(), GetLastError(), GetSymbol(), HasError(), and OpenLibrary().

handle

void* LibraryLoader::handle = nullptr

private

Handle to the library.

Definition at line 109 of file library_loader.h.

Referenced by CloseLibrary(), GetSymbol(), LibraryLoader(), and ~LibraryLoader().

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The documentation for this class was generated from the following files:

• src/library_loader.h
• src/os/unix/library_loader_unix.cpp
• src/os/windows/library_loader_win.cpp