Add timers for measuring elapsed time

test/src/TestTimer.c

@@ -0,0 +1,36 @@
+#include <BH/Unit.h>
+#include <BH/Timer.h>
+#include <BH/Thread.h>
+
+
+BH_UNIT_TEST(General)
+{
+    BH_Timer *timer;
+
+    BH_VERIFY((timer = BH_TimerNew()) != NULL);
+    BH_ThreadSleep(5000);
+
+    BH_VERIFY(BH_TimerMilliseconds(timer) >= 5000);
+    BH_VERIFY(BH_TimerNanoseconds(timer) >= 5000000000);
+    BH_VERIFY(BH_TimerRestart(timer) >= 5000);
+    BH_VERIFY(BH_TimerRestart(timer) < 5000);
+
+    BH_ThreadSleep(5000);
+    BH_VERIFY(BH_TimerMilliseconds(timer) >= 5000);
+    BH_TimerStart(timer);
+    BH_VERIFY(BH_TimerMilliseconds(timer) < 5000);
+
+    BH_TimerFree(timer);
+    return 0;
+}
+
+
+int main(int argc, char **argv)
+{
+    (void)argc;
+    (void)argv;
+
+    BH_UNIT_ADD(General);
+
+    return BH_UnitRun();
+}