1 files changed, 85 insertions, 0 deletions
diff --git a/libiot/pthread/test/pthread-join.c b/libiot/pthread/test/pthread-join.c
new file mode 100644
index 0000000..ba5f976
--- /dev/null
+++ b/libiot/pthread/test/pthread-join.c
@@ -0,0 +1,85 @@
+#include "unity.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <pthread.h>
+
+#include <sys/delay.h>
+
+#define NUM_THREADS  2
+
+static pthread_t threads[NUM_THREADS];
+
+static void *thread1(void *args) {
+	int count = 0;
+
+	for (count = 0; count < 100; count++) {
+		// Simulate some work
+		usleep(1000);
+	}
+
+	int *ret = malloc(sizeof(int));
+	*ret = count;
+
+	pthread_exit(ret);
+ }
+
+static void *thread2(void *args) {
+	int count;
+
+	for (count = 0; count < 50; count++) {
+		// Simulate some work
+		usleep(1000);
+	}
+
+	int *ret = malloc(sizeof(int));
+	*ret = count;
+
+	pthread_exit(ret);
+ }
+
+
+TEST_CASE("pthread join", "[pthread]") {
+	pthread_attr_t attr;
+	int i, ret;
+	int *res;
+
+	ret = pthread_attr_init(&attr);
+	TEST_ASSERT(ret == 0);
+
+	ret = pthread_create(&threads[0], &attr, thread1, NULL);
+	TEST_ASSERT(ret == 0);
+
+	ret = pthread_create(&threads[1], &attr, thread2, NULL);
+	TEST_ASSERT(ret == 0);
+
+	// Wait for all threads completion
+	for (i=0; i< NUM_THREADS; i++) {
+		ret = pthread_join(threads[i], (void **)&res);
+		TEST_ASSERT(ret == 0);
+
+		if (i == 0) {
+			TEST_ASSERT(*res == 100);
+		} else if (i == 1) {
+			TEST_ASSERT(*res == 50);
+		}
+
+		free(res);
+	}
+
+	// Check that a detached thread is not joinable
+	ret = pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED);
+	TEST_ASSERT(ret == 0);
+
+	ret = pthread_create(&threads[0], &attr, thread1, NULL);
+	TEST_ASSERT(ret == 0);
+
+	ret = pthread_join(threads[0], (void **)&res);
+	TEST_ASSERT(ret == EINVAL);
+
+	// Clean up
+	ret = pthread_attr_destroy(&attr);
+	TEST_ASSERT(ret == 0);
+}