Package RASCAL.Device

Description	Event definitions for device messages.
Author	bbracke
Date	2005/11/21 20:14:33
Revision	1.1

Clauses

Quick access : Clauses - Generics - Definitions - Subprograms

Context clauses
Interfaces.C
RASCAL.OS

Use clauses
Interfaces.C
RASCAL.OS

Definitions

Quick access : Clauses - Generics - Definitions - Subprograms

Types
*Name*	*Declaration*
Message_DeviceClaim_Pointer	access Message_DeviceClaim
Message_DeviceInUse_Pointer	access Message_DeviceInUse

Message_DeviceClaim	record
This message is broadcast by a task wishing to claim exclusive use of a system device.
*Component*	*Type*	*Default*
Information	Char_Array (1..228)
Minor	Integer
Major	Integer
Header	Message_Event_Header

AMEL_Message_DeviceClaim	abstract tagged record
inheritance from	Message_EventListener (Message_Event_DeviceClaim)
*Component*	*Type*	*Default*
Event	Message_DeviceClaim_Pointer

Message_DeviceInUse	record
This message is sent in response to a Message_DeviceClaim, if the receiver does not want the claimant to gain exclusive use of a device (i.e. it's already using it). The information string should be used to give information as to why the claim has failed, e.g. 'Printer is active'.
*Component*	*Type*	*Default*
Information	Char_Array (1..228)
Minor	Integer
Major	Integer
Header	Message_Event_Header

AMEL_Message_DeviceInUse	abstract tagged record
inheritance from	Message_EventListener (Message_Event_DeviceInUse)
*Component*	*Type*	*Default*
Event	Message_DeviceInUse_Pointer

Pragmas
Convention	(C, Message_DeviceClaim)
Convention	(C, Message_DeviceInUse)