Reactor-based threading model

* Use Reactor+Thread (common/thread.h) to replace existing
  libchrome-based message_loop_thread
* Use Handler to implement multiple message queue per thread, by using
  kernel-based eventfd

Test: run unit test, and run benchmark
Change-Id: Idd2e4ef99fb9a7b2c0956de0e372c67a1098f1b6

1 files changed, 31 insertions, 0 deletions

diff --git a/system/common/utils.h b/system/common/utils.h
new file mode 100644
index 0000000000..26e8f23df9
--- /dev/null
+++ b/system/common/utils.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+// A macro to re-try a syscall when it receives EINTR
+#ifndef RUN_NO_INTR
+#define RUN_NO_INTR(fn) \
+  do {                  \
+  } while ((fn) == -1 && errno == EINTR)
+#endif
+
+// A macro to disallow the copy constructor and operator= functions
+#ifndef DISALLOW_COPY_AND_ASSIGN
+#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&) = delete;      \
+  void operator=(const TypeName&) = delete
+#endif