#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
-#define AmountProduced 3 /* Amount of items produced by a producer */
-#define AmountConsumed 3 /* Amount of items consumed by a consumer */
-#define ProducerCount 2 /* Amount of producer threads*/
-#define ConsumerCount 2 /* Amount of consumer threads*/
-#define BufferSize 4 /* Size of the buffer */
+int AmountProduced = 3; /* Amount of items produced by a producer */
+int AmountConsumed = 3; /* Amount of items consumed by a consumer */
+int ProducerCount = 2; /* Amount of producer threads*/
+int ConsumerCount = 2; /* Amount of consumer threads*/
+int BufferSize = 4; /* Size of the buffer */
sem_t empty;
sem_t full;
int in = 0;
int out = 0;
-int buffer[BufferSize];
+int* buffer;
pthread_mutex_t mutex;
int do_output = 1;
for (int i = 0; i < AmountConsumed; i++) {
sem_wait(&full);
pthread_mutex_lock(&mutex);
- int item = buffer[out];
- if (do_output)
+ if (do_output) {
+ int item = buffer[out];
fprintf(stderr, "Consumer %d: Remove Item %d from %d\n", *((int*)id), item, out);
+ }
out = (out + 1) % BufferSize;
pthread_mutex_unlock(&mutex);
sem_post(&empty);
int main(int argc, char** argv)
{
- if (argc == 2 && strcmp(argv[1], "-q") == 0)
- do_output = 0;
- pthread_t pro[2];
- pthread_t con[2];
+ int opt;
+ while ((opt = getopt(argc, argv, "c:C:p:P:q")) != -1) {
+ switch (opt) {
+ case 'q':
+ do_output = 0;
+ break;
+ case 'c':
+ AmountConsumed = atoi(optarg);
+ break;
+ case 'C':
+ ConsumerCount = atoi(optarg);
+ break;
+ case 'p':
+ AmountProduced = atoi(optarg);
+ break;
+ case 'P':
+ ProducerCount = atoi(optarg);
+ break;
+ default: /* '?' */
+ printf("unknown option: %c\n", optopt);
+ break;
+ }
+ }
+ pthread_t* pro = malloc(ProducerCount * sizeof(pthread_t));
+ pthread_t* con = malloc(ConsumerCount * sizeof(pthread_t));
+ buffer = malloc(sizeof(int) * BufferSize);
pthread_mutex_init(&mutex, NULL);
sem_init(&empty, 0, BufferSize);
sem_init(&full, 0, 0);
- int ids[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The identity of each thread (for debug messages)
+ int* ids = malloc(sizeof(int) * (ProducerCount + ConsumerCount));
+ for (int i = 0; i < ProducerCount + ConsumerCount; i++)
+ ids[i] = i + 1; // The identity of each thread (for debug messages)
for (int i = 0; i < ProducerCount; i++)
- pthread_create(&pro[i], NULL, (void*)&producer, (void*)&ids[i]);
+ pthread_create(&pro[i], NULL, producer, &ids[i]);
for (int i = 0; i < ConsumerCount; i++)
- pthread_create(&con[i], NULL, (void*)&consumer, (void*)&ids[i]);
+ pthread_create(&con[i], NULL, consumer, &ids[i]);
for (int i = 0; i < ProducerCount; i++)
pthread_join(pro[i], NULL);
pthread_mutex_destroy(&mutex);
sem_destroy(&empty);
sem_destroy(&full);
+ free(pro);
+ free(con);
+ free(buffer);
+ free(ids);
return 0;
}