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{{occlass|library=AppSupport.framework}} | {{occlass|library=AppSupport.framework}} | ||
[[CPExclusiveLock]] provides system-wise locking through temporary files. You use CPExclusiveLock like any other <code> | [[CPExclusiveLock]] provides system-wise locking through temporary files. You use CPExclusiveLock like any other <code>NSLocking</code>-conformant classes, e.g. | ||
<source lang="objc"> | <source lang="objc"> | ||
CPExclusiveLock* syslock = [[CPExclusiveLock alloc] initWithName:@"MyExclusiveLock"]; | CPExclusiveLock* syslock = [[CPExclusiveLock alloc] initWithName:@"MyExclusiveLock"]; | ||
Revision as of 17:58, 9 December 2012
CPExclusiveLock provides system-wise locking through temporary files. You use CPExclusiveLock like any other NSLocking-conformant classes, e.g.
CPExclusiveLock* syslock = [[CPExclusiveLock alloc] initWithName:@"MyExclusiveLock"];
[syslock lock];
[device doOperation:1 :2 :3 :4];
[syslock unlock];
A CPExclusiveLock will create a temporary file in ~/Library/Caches. If the name is given, it will be used as the filename.
When the lock is acquired, the object will open the temporary file with O_NONBLOCK|O_EXLOCK|O_CREAT mode.