After that, the consumer acquires lock on the buffer. Then it decrements the full semaphore because the number of occupied slots will beĭecreased by one, after the consumer completes its operation. The consumer waits until there is atleast one full slot in the buffer. The pseudocode for the consumer function looks like this: Incremented because the producer has just filled a slot in the buffe After performing the insert operation, the lock is released and the value of full is Then, it acquires lock on the buffer, so that the consumer cannot access the buffer until Since the producer is going to insert data in one of those slots. Then it decrements the empty semaphore because, there will now be one less empty slot, Looking at the above code for a producer, we can see that a producer first waits until full, a counting semaphore whose initial value is 0.Īt any instant, the current value of empty represents the number of empty slots in the bufferĪnd full represents the number of occupied slots in the buffer. empty, a counting semaphore whose initial value is the number of slots in the buffer, since, m, a binary semaphore which is used to acquire and release the lock. The semaphores which will be used here are: One solution of this problem is to use semaphores. There needs to be a way to make the producer and consumer work in an independent manner. Those two processes won't produce the expected output if they are A consumer tries to remove dataįrom a filled slot in the buffer. Processes running, namely, producer and consumer, which are operating on the buffer.Ī producer tries to insert data into an empty slot of the buffer. There is a buffer of n slots and each slot is capable of storing one unit of data. Let's start by understanding the problem here, before moving on to Weiner)īounded buffer problem, which is also called producer consumer problem, is one of the classic Environmental Pollution and Control (P.Marketing Management : Analysis, Planning, and Control (Philip Kotler).
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