--- /dev/null
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <semaphore.h>
+
+int MaxItems; // Maximum items a producer can produce or a consumer can consume
+int BufferSize; // Size of the buffer
+
+sem_t empty;
+sem_t full;
+int in = 0;
+int out = 0;
+int *buffer;
+pthread_mutex_t mutex;
+
+int DEBUG = 0; // Debug flag
+
+static void *producer(void *pno)
+{
+ int item;
+ for(int i = 0; i < MaxItems; i++) {
+ item = rand(); // Produce a random item
+ pthread_mutex_lock(&mutex);
+ sem_wait(&empty);
+ buffer[in] = item;
+ if(DEBUG) printf("Producer %d: Insert Item %d at %d\n", *((int *)pno),buffer[in],in);
+ in = (in+1)%BufferSize;
+ pthread_mutex_unlock(&mutex);
+ sem_post(&full);
+ }
+ return NULL;
+}
+
+static void *consumer(void *cno)
+{
+ for(int i = 0; i < MaxItems; i++) {
+ pthread_mutex_lock(&mutex);
+ sem_wait(&full);
+ int item = buffer[out];
+ if(DEBUG) printf("Consumer %d: Remove Item %d from %d\n",*((int *)cno),item, out);
+ out = (out+1)%BufferSize;
+ pthread_mutex_unlock(&mutex);
+ sem_post(&empty);
+ }
+ return NULL;
+}
+
+int main(int argc, char* argv[]) {
+ if(argc != 4){
+ printf("Usage: %s MAX_ITEMS BUFFER_SIZE DEBUG\n", argv[0]);
+ return 1;
+ }
+
+ MaxItems = atoi(argv[1]);
+ BufferSize = atoi(argv[2]);
+ DEBUG = atoi(argv[3]);
+
+ buffer = (int*) malloc(BufferSize * sizeof(int));
+
+ pthread_t pro[5],con[5];
+ pthread_mutex_init(&mutex, NULL);
+ sem_init(&empty,0,BufferSize);
+ sem_init(&full,0,0);
+
+ int a[5] = {1,2,3,4,5}; //Just used for numbering the producer and consumer
+
+ for(int i = 0; i < 5; i++) {
+ pthread_create(&pro[i], NULL, producer, (void *)&a[i]);
+ }
+ for(int i = 0; i < 5; i++) {
+ pthread_create(&con[i], NULL, consumer, (void *)&a[i]);
+ }
+
+ for(int i = 0; i < 5; i++) {
+ pthread_join(pro[i], NULL);
+ }
+ for(int i = 0; i < 5; i++) {
+ pthread_join(con[i], NULL);
+ }
+
+ free(buffer);
+ return 0;
+}