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#pragma once
#include <string>
#include <vector>
#include <memory>
#if defined(WIN32)
const char* const MODULE_FILE_EXTENSION = ".dll";
#elif defined(POSIX)
const char* const MODULE_FILE_EXTENSION = ".so";
#endif
/** greebo: This file declares the classes encapsulating a dynamically linked library.
* Each DL class must define a FunctionPointer typedef and a findSymbol() method.
*
* The declaration is platform-specific, currently Win32 and POSIX are declared.
*/
/**
* =============================== WIN32 ======================================
*/
#if defined(WIN32)
#define NOMINMAX
#include <windows.h>
namespace module
{
/** greebo: WIN32 DynamicLibrary. Loads a DLL given in the constructor.
*/
class DynamicLibrary
{
// The full filename of this library
std::wstring _name;
// The library handle
HMODULE _library;
public:
// The win32 function pointer typedef for calling symbols
typedef FARPROC FunctionPointer;
// Constructor, pass the full filename to load this DLL
DynamicLibrary(const std::string& filename);
~DynamicLibrary();
// Returns TRUE if the library load failed. (TODO: greebo: Remove this in favour of exceptions?)
bool failed();
/** greebo: The lookup method for symbols. Returns a platform-specific function
* pointer that can be used to call the symbol.
*/
FunctionPointer findSymbol(const std::string& symbol);
// Returns the filename of this module
std::string getName() const;
};
} // namespace module
/**
* =============================== POSIX ======================================
*/
#elif defined(POSIX)
#include <dlfcn.h>
namespace module
{
class DynamicLibrary
{
// The full filename of this library
std::string _name;
// The handle for accessing the dynamic library
void* _dlHandle;
public:
// The posix function pointer typedef for calling symbols
typedef int (* FunctionPointer)();
// Constructor, pass the full filename to load this DLL
DynamicLibrary(const std::string& filename);
~DynamicLibrary();
// Returns TRUE if the library load failed. (TODO: greebo: Remove this in favour of exceptions?)
bool failed();
/** greebo: The lookup method for symbols. Returns a platform-specific function
* pointer that can be used to call the symbol.
*/
FunctionPointer findSymbol(const std::string& symbol);
// Returns the filename of this module
std::string getName() const;
};
} // namespace module
#else
#error "unsupported platform"
#endif
namespace module
{
// Shared ptr typedef
typedef std::shared_ptr<DynamicLibrary> DynamicLibraryPtr;
// A list of allocated libraries
typedef std::vector<DynamicLibraryPtr> DynamicLibraryList;
}
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