Embedded Programming with Modern C++ Cookbook

How it works...

In our sample application, we defined two data structures, ObjectMetadata1 and ObjectMetadata2, that will hold some metadata about file objects. We defined four fields that represent an object:

• Access flags: A combination of bits representing a type of file access, such as read, write, or execute. All bit fields are packed into a single uint8_t field.
• Size: Object size as a 32-bit unsigned integer. It limits the supported object size to 4 GB, but it is sufficient for our goal to demonstrate the importance of proper data alignment.
• Owner ID: A 32-bit integer that identifies a user in our system.
• Category: The category of the object. This can be a file, a directory, or a socket. Since we've only defined three categories, the  ...