From 7a73162607544204032aa66cce755daf21edebda Mon Sep 17 00:00:00 2001
From: Matt Strapp <matt@mattstrapp.net>
Date: Tue, 24 May 2022 11:18:46 -0500
Subject: Graduate

Signed-off-by: Matt Strapp <matt@mattstrapp.net>
---
 OLD/csci4061/112320_breakout/sol-semaphore.c | 128 ---------------------------
 1 file changed, 128 deletions(-)
 delete mode 100644 OLD/csci4061/112320_breakout/sol-semaphore.c

(limited to 'OLD/csci4061/112320_breakout/sol-semaphore.c')

diff --git a/OLD/csci4061/112320_breakout/sol-semaphore.c b/OLD/csci4061/112320_breakout/sol-semaphore.c
deleted file mode 100644
index 4af3a5b..0000000
--- a/OLD/csci4061/112320_breakout/sol-semaphore.c
+++ /dev/null
@@ -1,128 +0,0 @@
-#define NUM_ARGS 0
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <string.h>
-#include <time.h>
-#include <pthread.h>
-#include <semaphore.h>
-#include<sys/time.h>
-
-long semTotal = 0;
-
-struct buffer {
-
-	int vals[100];
-	int index;
-};
-
-struct semBuffer {
-
-	struct buffer* q;
-	sem_t* psem;
-	sem_t* csem;
-	pthread_mutex_t* mutex;
-};
-
-void insert(struct buffer* q, int val) {
-
-	q->vals[q->index] = val;
-	++q->index;
-}
-
-int delete(struct buffer* q) {
-
-	--q->index;
-	int val = q->vals[q->index];
-	return val;
-}
-
-// TODO: Insert code to use a semaphore.
-void* semProducer(void* arg) {
-
-	// Random delay. DO NOT REMOVE!
-	usleep(rand() % 1000);
-
-	struct semBuffer* sq = (struct semBuffer*) arg;
-	sem_wait(sq->psem);
-	pthread_mutex_lock(sq->mutex);
-
-	static int in = 0;
-	++in;
-	// Add an element to the queue.
-	insert(sq->q, in);
-
-	pthread_mutex_unlock(sq->mutex);
-	sem_post(sq->csem);
-
-}
-
-// TODO: Insert code to use a semaphore.
-void* semConsumer(void* arg) {
-
-	// Random delay. DO NOT REMOVE!
-	usleep(rand() % 1000);
-
-	struct semBuffer* sq = (struct semBuffer*) arg;
-
-	sem_wait(sq->csem);
-	pthread_mutex_lock(sq->mutex);
-
-	// Reove an element from the queue.
-	semTotal += delete(sq->q);
-
-	pthread_mutex_unlock(sq->mutex);
-	sem_post(sq->psem);
-}
-
-int main(int argc, char** argv) {
-
-	if (argc != NUM_ARGS + 1) {
-
-		printf("Wrong number of args, expected %d, given %d\n", NUM_ARGS, argc - 1);
-		exit(1);
-	}
-
-	// Seed the random generator.
-	srand(time(NULL));
-
-	// Create threads.
-	pthread_t semPool[100];
-
-	struct timeval start;
-	gettimeofday(&start, NULL);
-
-	// Create task queue.
-	struct semBuffer* sq = (struct semBuffer*) malloc(sizeof(struct semBuffer));
-
-	sq->q = (struct buffer*) malloc(sizeof(struct buffer));
-	sq->q->index=0;
-	sq->psem = (sem_t*) malloc(sizeof(sem_t));
-	sq->csem = (sem_t*) malloc(sizeof(sem_t));
-	sq->mutex = (pthread_mutex_t*) malloc(sizeof(pthread_mutex_t));
-
-	// TODO: Initilaize semaphores
-	sem_init(sq->psem, 0, 50);
-	sem_init(sq->csem, 0, 0);
-	
-	pthread_mutex_init(sq->mutex, NULL);
-
-	for (int i=0; i < 50; ++i) {
-
-		pthread_create(&semPool[i], NULL, semProducer, (void*) sq);
-		pthread_create(&semPool[50 + i], NULL, semConsumer, (void*) sq);
-	}
-
-	for (int i=0; i < 100; ++i) pthread_join(semPool[i], NULL);
-
-	struct timeval end;
-	gettimeofday(&end, NULL);
-	printf("Sem Test: \nTotal of buffer  = %ld\n", semTotal);
-	printf("Time (in us) to complete = %ld\n", ((end.tv_sec - start.tv_sec) * 1000000) + (end.tv_usec - start.tv_usec));
-}
-- 
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