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exchange -- exchange the value of an atomic integer

Synopsis

Usage:

exchange(x, y)
Inputs:
- x, an atomic integer,
- y, an integer,
Outputs:
- an integer,

Description

The value of y is stored in x and the original value of x is returned. This operation occurs atomically and is thread safe.

i1 : x = new AtomicInt

o1 = 0

o1 : AtomicInt

i2 : exchange(x, 5)

o2 = 0

i3 : x

o3 = 5

o3 : AtomicInt

Ways to use exchange :

exchange(AtomicInt,ZZ)

For the programmer

The object exchange is a method function.