Utility classes for VHAL implementation

---

This directory stores utility classes for VHAL implementation. Vendor implementation could use utility classes from common folder in their VHAL implementation.

common

Defines common utility libraries.

ConcurrentQueue

Provides a thread-safe concurrent queue object. Useful for adding object to a queue in one thread (usually binder thread) and handle the objects in a separate handler thread.

ParcelableUtils

Provides functions to convert between a regular parcelable and a LargeParcelabe.

A LargeParcelable is a parcelable that marshals the payload into a shared memory file if the payload is too large to pass across binder. It is used to pass large data across binder. Before sending the data, VHAL impl should convert a regular parcelabe to a LargeParcelable. After receving data, VHAL impl should convert a LargeParcelable back to regular parcelabe.

PendingRequestPool

Defines A class for managing pending requests and automatically call timeout callback if the request timed-out.

PropertyUtils

Defines some useful constants.

RecurrentTimer

Defines a thread-safe recurrent timer that can call a function periodically.

VehicleHalTypes

Provides a header file that includes many commonly used header files. Useful when you are using multiple types defined in VHAL interface.

VehicleObjectPool

Defines a reusable in-memory pool for VehiclePropValue.

VehiclePropertyStore

Defines an in-memory map for storing vehicle properties. Allows easier insert, delete and lookup.

VehicleUtils

Defines many useful utility functions.

test

Defines utility libraries for test only.