1 files changed, 74 insertions, 0 deletions
diff --git a/source/test/unittests/mutex.test.c b/source/test/unittests/mutex.test.c
new file mode 100644
index 0000000..c0153e7
--- /dev/null
+++ b/source/test/unittests/mutex.test.c
@@ -0,0 +1,74 @@
+#include "../../kit/threads.h"
+
+#define KIT_TEST_FILE mutex
+#include "../../kit_test/test.h"
+
+enum { THREAD_COUNT = 200 };
+
+typedef struct {
+  mtx_t lock;
+  int   value;
+} test_data_t;
+
+static int test_run(void *data) {
+  test_data_t *x = (test_data_t *) data;
+  for (int i = 0; i < 1000; i++) {
+    mtx_lock(&x->lock);
+
+    x->value += i;
+    thrd_yield();
+    x->value -= i + 42;
+    thrd_yield();
+    x->value += i + 20;
+    thrd_yield();
+    x->value += 22 - i;
+
+    mtx_unlock(&x->lock);
+  }
+  return 0;
+}
+
+int test_lock_for_2_sec(void *data) {
+  mtx_t *m = (mtx_t *) data;
+  mtx_lock(m);
+
+  struct timespec sec = { .tv_sec = 2, .tv_nsec = 0 };
+  thrd_sleep(&sec, NULL);
+
+  mtx_unlock(m);
+}
+
+TEST("mutex lock") {
+  test_data_t data;
+  thrd_t      pool[THREAD_COUNT];
+  data.value = 42;
+  REQUIRE(mtx_init(&data.lock, mtx_plain) == thrd_success);
+
+  for (ptrdiff_t i = 0; i < THREAD_COUNT; i++)
+    thrd_create(pool + i, test_run, &data);
+  for (ptrdiff_t i = 0; i < THREAD_COUNT; i++)
+    thrd_join(pool[i], NULL);
+
+  mtx_destroy(&data.lock);
+  REQUIRE(data.value == 42);
+}
+
+TEST("mutex try lock") {
+  mtx_t m;
+  REQUIRE(mtx_init(&m, mtx_plain) == thrd_success);
+
+  thrd_t t;
+  REQUIRE(thrd_create(&t, test_lock_for_2_sec, &m) == thrd_success);
+
+  struct timespec sec = { .tv_sec = 1, .tv_nsec = 0 };
+  REQUIRE(thrd_sleep(&sec, NULL) == thrd_success);
+
+  REQUIRE(mtx_trylock(&m) == thrd_busy);
+
+  REQUIRE(thrd_join(t, NULL) == thrd_success);
+
+  REQUIRE(mtx_trylock(&m) == thrd_success);
+  REQUIRE(mtx_unlock(&m) == thrd_success);
+
+  mtx_destroy(&m);
+}