Pointer access and cache coherency

To my understanding, when you access a variable, that variable and the surrounding area of memory is put into the L1 cache. If I’m wrong here, please tell me.

Pointer access and cache coherency

To my understanding, when you access a variable, that variable and the surrounding area of memory is put into the L1 cache. If I’m wrong here, please tell me.

What are the real life use cases for tagged pointers? [closed]

Closed 10 years ago.

What are the real life use cases for tagged pointers? [closed]

Closed 10 years ago.

What are the real life use cases for tagged pointers? [closed]

Closed 10 years ago.

adding array pointer in c

I am having problems understanding how this equation works in c:

adding array pointer in c

I am having problems understanding how this equation works in c:

adding array pointer in c

I am having problems understanding how this equation works in c:

adding array pointer in c

I am having problems understanding how this equation works in c:

Is it better to use an external variable or to pass around a pointer?

While writing in C, I have always wondered about when is the best time to use an external variable. I generally prefer to pass a pointer into a method. Is there a correct time to use an external variable and a correct time to use pointers?