reorganize directories

[awesomized/libmemcached] / src / util / signal.hpp

diff --git a/src/util/signal.hpp b/src/util/signal.hpp
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+++ b/src/util/signal.hpp
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+/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ *  Data Differential Utility library
+ *
+ *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *      * Redistributions of source code must retain the above copyright
+ *  notice, this list of conditions and the following disclaimer.
+ *
+ *      * Redistributions in binary form must reproduce the above
+ *  copyright notice, this list of conditions and the following disclaimer
+ *  in the documentation and/or other materials provided with the
+ *  distribution.
+ *
+ *      * The names of its contributors may not be used to endorse or
+ *  promote products derived from this software without specific prior
+ *  written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#pragma once 
+
+#include <pthread.h>
+#include <semaphore.h>
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (signal_callback_fn)();
+
+#ifdef __cplusplus
+}
+#endif
+
+namespace datadifferential {
+namespace util {
+
+enum shutdown_t {
+  SHUTDOWN_RUNNING,
+  SHUTDOWN_GRACEFUL,
+  SHUTDOWN_FORCED
+};
+
+class SignalThread {
+  bool _exit_on_signal;
+  sigset_t set;
+  sem_t lock;
+  uint64_t magic_memory;
+  volatile shutdown_t __shutdown;
+  pthread_mutex_t shutdown_mutex;
+
+public:
+
+  SignalThread(bool exit_on_signal_arg= false);
+
+  void test();
+  void post();
+  bool setup();
+
+  bool exit_on_signal()
+  {
+    return _exit_on_signal;
+  }
+
+  int wait(int& sig)
+  {
+    return sigwait(&set, &sig);
+  }
+
+  ~SignalThread();
+
+  void set_shutdown(shutdown_t arg);
+  bool is_shutdown();
+  shutdown_t get_shutdown();
+
+  void sighup();
+  void sighup(signal_callback_fn* arg);
+
+private:
+  pthread_t thread;
+  signal_callback_fn* _sighup;
+};
+
+} /* namespace util */
+} /* namespace datadifferential */