CODEWITHSUNDEEP
c++templatesnew-operator
nevermore
nevermore

Reputation: 3

syntax of operator new in c++ new to me

i am new with c++ and i have a piece of code below that i am unable to understand 

from_net_fifos = new my_fifo_t <net_cmd_t> ** [NUM_PRIORITIES];

To be specific, I dont get what the ** means here.

I got this much from the code.

my_fifo_t is a template, net_cmd_t is a type which is a struct ,

the number of fifos created = number of priorities, ie each message with a different prirority has its own fifo queue. So basically we are creating fifo of type net_cmd_t, ie each element is of this struct type in the fifo. The number of fifos created equals the variable NUM_PRIORITIES.

What does ** do here? Can someone correct me if i am wrong and explain the exact syntax of this line of code?

Upvotes: 0

Views: 112

Answers (1)

Some programmer dude
Some programmer dude

Reputation: 409196

The asterisks * are used to denote pointers, and the statement allocates NUM_PRIORITES pointers to pointers to my_fifo_t. You can think of it as an array of arrays of pointers to my_fifo_t.

Upvotes: 5

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