CODEWITHSUNDEEP
iphoneobjective-ciosios4filesystems
teerapap
teerapap

Reputation: 5423

Read-write file locking in Obj-C (iPhone)

I'm finding the way to read/write file with locking. Does iOS sdk support this feature?

I see there are 2 ways to read-write file.

First with NSFileManager and another is NSInputStream/NSOutputStream, but I haven't seen the way to handle file concurrency, for example, open file with write lock.

Or I have to implement those locking by myself?

Upvotes: 1

Views: 2949

Answers (2)

EricS
EricS

Reputation: 9768

In general, iOS apps don't bother locking files because the documents are sandboxed away from other applications. flock() is implemented in iOS, but I haven't personally used it. It might be useful if you have multiple threads or classes sharing the same files.

Upvotes: 3

Daniel
Daniel

Reputation: 31589

NSOutputStream outputStreamToFileAtPath:append: keeps a write lock to the file.
You can still use fopen and fstream (in objc++) and they will work just like in a regular linux.

Upvotes: 1

Related Questions