Latest 0.1.0
License MIT
Platforms ios 8.0


This is a collection of Data Structures and Utility classes written in Objective C, that are not provided by Cocoa itself.


Counterpart to ConcurrentHashMap Java Collection. This class utilises the power of the libdispatch library to provide synchronuos reads and exclusive writes to give you a thread-safe key-value data structure, that is, it can maintain data consistency even when multiple threads are trying to read from and write to the data structure.

How it works

Read guidelines here
The dictionary creates a concurrent dispatch queue solely for the purpose of reading from / writing to this dictionary. We use dispatch_sync for reading synchronously and dispatch_barrier_async for writing exclusively to the data.


Counterpart to AtomicInteger from Java. This class uses OS-level atomic operations meant for register addition and register swapping to wrap an NSInteger such that it can support reads / writes by multiple concurrent threads, in an atomic fashion.

How it works

Read guidelines here

Get started

  1. Install with CocoaPods or clone from github. Add pod 'ObjCUtilities' to your Podfile and run pod install.
  2. Import the required file e.g. #import "ConcurrentDictionary.h" in your code and start using.

Support / Discussions

Please raise issues on github as needed. For any questions / suggestions (that do not directly translate into issues) please write to me at [email protected]

Latest podspec

    "name": "ObjCUtilities",
    "version": "0.1.0",
    "summary": "Objective C Data Structures and Utilities not provided by Cocoa by default",
    "description": "A collection of Data Strcutures and utilities that we often need while writing with Objective C but are not provided by Cocoa iself. Some of the examples are a Concurrent NSDictionary and a Atomic NSInteger.",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    "authors": {
        "iamprabal": "[email protected]"
    "source": {
        "git": "",
        "tag": "0.1.0"
    "platforms": {
        "ios": "8.0"
    "source_files": "ObjCUtils/Classes/**/*"

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