Create a file generating function

[alicjakwie]

We want to use a pseudo-random byte generator using math/rand in go to generate file contents

[evanSpendlove]

Include generating the file name here (as per Cian's comment):

Example function signature:
func GiveMeAFile(int id, int64 size) (string, io.LimitedReader)

With LimitedReader supplying the file contents.

[evanSpendlove]

Working on this now.

[evanSpendlove]

For the mutex locking we can use something similar to the private read() method in math/rand:

We will need to implement a locked source ourselves first.

// read implements Read for a lockedSource without a race condition.
func (r *lockedSource) read(p []byte, readVal *int64, readPos *int8) (n int, err error) {
	r.lk.Lock()
	n, err = read(p, r.src, readVal, readPos)
	r.lk.Unlock()
	return
}