2016 Update

Task/Dining-philosophers/C/dining-philosophers-3.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <threads.h>
+#include <stdlib.h>
+
+#define NUM_THREADS 5
+
+struct timespec time1;
+mtx_t forks[NUM_THREADS];
+
+typedef struct {
+	char *name;
+	int left;
+	int right;
+} Philosopher;
+
+Philosopher *create(char *nam, int lef, int righ) {
+	Philosopher *x = malloc(sizeof(Philosopher));
+	x->name = nam;
+	x->left = lef;
+	x->right = righ;
+	return x;
+}
+
+int eat(void *data) {
+	time1.tv_sec = 1;
+	Philosopher *foo = (Philosopher *) data;
+	mtx_lock(&forks[foo->left]);
+	mtx_lock(&forks[foo->right]);
+	printf("%s is eating\n",  foo->name);
+	thrd_sleep(&time1, NULL);
+	printf("%s is done eating\n",  foo->name);
+	mtx_unlock(&forks[foo->left]);
+	mtx_unlock(&forks[foo->right]);
+	return 0;
+}
+
+int main(void) {
+    thrd_t threadId[NUM_THREADS];
+	Philosopher *all[NUM_THREADS] = {create("Teral", 0 ,1),
+					create("Billy", 1, 2),
+					create("Daniel", 2,3),
+					create("Philip", 3, 4),
+					create("Bennet", 0, 4)};
+	for (int i = 0; i < NUM_THREADS; i++){
+		if (mtx_init(&forks[i], mtx_plain) != thrd_success){
+			puts("FAILED IN MUTEX INIT!");
+			return 0;
+		}
+	}
+    for (int i=0; i < NUM_THREADS; ++i) {
+        if (thrd_create(threadId+i, eat, all[i]) != thrd_success) {
+            printf("%d-th thread create error\n", i);
+            return 0;
+        }
+    }
+
+    for (int i=0; i < NUM_THREADS; ++i)
+        thrd_join(threadId[i], NULL);
+    return 0;
+}