Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
SharedMemory.h
/* |
File: SharedMemory.h |
Contains: A sample to demonstrate Shared Memory using shmget() |
Written by: Karl Groethe |
Copyright: Copyright © 2000 by Apple Computer, Inc., All Rights Reserved. |
You may incorporate this Apple sample source code into your program(s) without |
restriction. This Apple sample source code has been provided "AS IS" and the |
responsibility for its operation is yours. You are not permitted to redistribute |
this Apple sample source code as "Apple sample source code" after having made |
changes. If you're going to re-distribute the source, we require that you make |
it clear in the source that the code was descended from Apple sample source |
code, but that you've made changes. |
Change History (most recent first): |
8/16/00 Created |
*/ |
#import <AppKit/AppKit.h> |
#include <semaphore.h> |
@interface SharedMemory : NSObject |
{ |
//interface elements |
NSTextField* AttachTime; |
NSTextField* ChangeTime; |
NSButton* AttachDetach; |
NSTextField* Creator; |
NSTextView* Data; |
NSTextField* DetachTime; |
NSTextField* Key; |
NSTextField* NumberOfAttaches; |
NSTextField* Operator; |
NSTextField* BlockSize; |
NSButton* StartStopButton; |
//data elements |
char* SharedMemoryBlock; //a character pointer to our data block |
int SharedMemID; //the ID given to our shared memory segment by Shmget |
sem_t* SemaphoreID; //A semaphore to protect the shared memory while we read or write |
} |
-(void)AttachDetach:(id)sender; //called when the Create/Attach or Detach button is clicked |
-(void)StartStopEditing:(id)sender; //called when the Start or Stop Editing button is clicked |
-(void)FinishedUpdate:(id)anObject; //called when our update thread completes so we can spin off another |
-(id)init; |
-(void)dealloc; |
@end |
Copyright © 2003 Apple Computer, Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2003-01-14