GuardedKeyboard Class Reference

syscall interface for keyboard. More...

#include <guarded_keyboard.h>

Inheritance diagram for GuardedKeyboard:

Collaboration diagram for GuardedKeyboard:

Public Member Functions
Key	getKey ()
	Application interface to retrieve a Key.
Public Member Functions inherited from Keyboard
	Keyboard ()
	Constructor.
void	plugin ()
	Initialization of the keyboard.
bool	prologue () override
	Prologue of keyboard interrupts.
void	epilogue () override
	Epilogue of keyboard interrupts.
Key	getKey ()
	Application interface to retrieve a Key.
Public Member Functions inherited from Gate
	Gate ()
	Constructor.
virtual	~Gate ()
	Destructor.
virtual bool	prologue ()=0
	Device-specific interrupt handling routine that is executed immediately after the interrupt occurs (asynchronously).
virtual void	epilogue ()
	Possibly delayed, synchronously executed Device-specific interrupt handling routine.

Detailed Description

syscall interface for keyboard.

Guarded interface to the Keyboard used by user applications.

Implements the system call interface for class Keyboard. All methods provided by this class are wrappers for the respective method from the base class, which provide additional synchronization by using the class Guarded.

Member Function Documentation

getKey()

Key GuardedKeyboard::getKey ( )

inline

Application interface to retrieve a Key.

This method returns the last pressed key (as an Key object). If no key has been pressed, the calling application thread is blocked until a key is available – this is achieved by using a Semaphore.

Returns

Pressed key

Note

This method is equal to the correspondent method in base class Keyboard, with the only difference that the call will be protected by a Guarded object.

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

• syscall/guarded_keyboard.h