Two types of buffers can be used. T

Two types of buffers can be used. The unbounded buffer places no practical
limit on the size of the buffer. The consumer may have to wait for new items,
but the producer can always produce new items. The bounded buffer assumes
a fixed buffer size. In this case, the consumer must wait if the buffer is empty,
and the producer must wait if the buffer is full.
Let’s look more closely at how the bounded buffer illustrates interprocess
communication using shared memory. The following variables reside in a
region of memory shared by the producer and consumer processes: