Rui Ribeiro
2128325237
- Added exercices: - Added process basics. - Added semaphores basics. - Added process communication - Added process termination - Added process_philosophers - Renamed and reordered philosophers_bonus
24 lines
1.0 KiB
Plaintext
24 lines
1.0 KiB
Plaintext
Assignment name: philosophers_bonus
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Expected files: philosophers_bonus.c
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Allowed functions: memset, printf, malloc, free, write, fork, kill, exit,
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pthread_create, pthread_detach, pthread_join, usleep, gettimeofday,
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waitpid, sem_open, sem_close, sem_post, sem_wait, sem_unlink
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-------------------------------------------------------------------------
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Implement the bonus version of Philosophers:
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- Each philosopher is a separate process (not thread)
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- Use named POSIX semaphores for coordination
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- Parent process monitors all child processes
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- If a philosopher dies, kill all other processes
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Additional features:
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- Proper cleanup of named semaphores
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- Signal handling (SIGINT, SIGTERM)
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- Final report with statistics
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Usage: `./philosophers_bonus 5 800 200 200 7`
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Hint: Bonus part uses processes instead of threads.
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Named POSIX semaphores allow communication between processes.
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Use fork() to create child processes and waitpid() to monitor.
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Semaphore cleanup is crucial - use sem_unlink() and signal handling for cleanup in case of interruption. |