Producer-consumer Problem using C/C++ and Pthread APIs (Thread-safe)
Do programming project 3: Producer-Consumer Problem described in pp. 253-255 in Textbook 9-th ed. using
Pthread APIs and C (or C++) language on Linux with the following additional requirements:
As described in the text, your program should be run in the following way:
% ./producer_consumer2 how_long_to_sleep_in_seconds num_of_producers number_of_consumers
%./producer_consumer2 180 10 20
Your program will
As soon as the program starts, read all the words in [login to view URL] into an array
Create 10 producer threads
Create 20 consumer threads
Each producer/consumer thread should run an infinite loop doing one of the followings:
o Each producer thread sleeps for a random period of seconds (between 0 and RAND_MAX),
upon awakening, will attempt to insert a word randomly selected from the list of words in
[login to view URL] into the buffer. Whenever a randomly selected word is inserted into the buffer,
the information should be printed on the screen (i.e., thread_id and the word)
o Each consumer thread sleeps for a random period of seconds (between 0 and RAND_MAX),
upon awakening, will attempt to remove a word from the buffer. Whenever a word is removed
from the buffer, the information should be printed on the screen (i.e., thread_id and the word)
Your program will run for 180 seconds.
An outline of the producer and consumer threads is shown in Figure 5.26.
The name of the executable file should “producer_consumer2”.
RAND_MAX should be 10 (i.e., 10 seconds)
Your program should be use all of the following Pthread APIs correctly!
o mutex_lock, mutex_unlock, sem_wait, sem_post
o You have to use BOTH MUTEX AND SEMAPHORE.
In your code, you can use sleep(seconds) API to make threads to sleep for seconds.
You need to provide a write-up in plain text format describing your source code (300 words or more).
Each producer/consumer thread should print out a message whenever some value is inserted into the
buffer or removed from the buffer along with its own identifier. Use the following message formats:
[consumer thread ID: 2] removed an item (word: apple) from the buffer
[producer thread ID: 1] inserted an item (word: orange) to the buffer
Recommended Testing scenarios:
Only producer threads are running
o ./producer_consumer2 180 10 0
All producer threads should be blocked eventually since there is no consumer thread.
Only consumer threads are running
o ./producer_consumer2 180 0 10
All consumer threads are blocked at the beginning since there is no data to be read by
the consumer threads
Multiple producer threads and multiple consumer threads
%./producer_consumer2 180 10 20
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