Removed Common

Change-Id: I01ea8f07220375c2ad9bc0092281d4f27c642303
diff --git a/aos/condition.cc b/aos/condition.cc
new file mode 100644
index 0000000..d1ad3a9
--- /dev/null
+++ b/aos/condition.cc
@@ -0,0 +1,30 @@
+#include "aos/condition.h"
+
+#include <inttypes.h>
+#include <assert.h>
+
+#include "aos/type_traits/type_traits.h"
+#include "aos/mutex/mutex.h"
+
+namespace aos {
+
+static_assert(shm_ok<Condition>::value,
+              "Condition should work in shared memory");
+
+Condition::Condition(Mutex *m) : impl_(), m_(m) {}
+
+bool Condition::Wait() {
+  const int ret = condition_wait(&impl_, &m_->impl_);
+  assert(__builtin_expect(ret == 0 || ret == 1, 1));
+  return ret == 1;
+}
+
+void Condition::Signal() {
+  condition_signal(&impl_, &m_->impl_);
+}
+
+void Condition::Broadcast() {
+  condition_broadcast(&impl_, &m_->impl_);
+}
+
+}  // namespace aos