go - Mutual Exclusion of Concurrent Goroutines

Question

In my code there are three concurrent routines. I try to give a brief overview of my code,

Routine 1 {
do something

*Send int to Routine 2
Send int to Routine 3
Print Something
Print Something*

do something
}

Routine 2 {
do something

*Send int to Routine 1
Send int to Routine 3
Print Something
Print Something*

do something
}

Routine 3 {
do something

*Send int to Routine 1
Send int to Routine 2
Print Something
Print Something*

do something
}

main {
routine1
routine2
routine3
}

I want that, while codes between two do something (codes between two star marks) is executing, flow of control must not go to other goroutines. For example, when routine1 is executing the events between two stars (sending and printing events), routine 2 and 3 must be blocked (means flow of execution does not pass to routine 2 or 3 from routine 1). After completing last print event, flow of execution may pass to routine 2 or 3. Can anybody help me by specifying, how can I achieve this ? Is it possible to implement above specification by WaitGroup ? Can anybody show me by giving a simple example how to implement above specified example by using WaitGroup. Thanks.

NB: I give two sending and two printing options, in fact there is lots of sending and printing.

Answer 1

Waitting for answers