git.m6w6.name Git - awesomized/libmemcached/blob - util/signal.hpp

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   2  *
   3  *  Data Differential Utility library
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   5  *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
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  36
  37 #pragma once
  38
  39 #include <pthread.h>
  40 #include <semaphore.h>
  41
  42 #ifdef HAVE_SIGNAL_H
  43 #include <signal.h>
  44 #endif
  45
  46 #ifdef  __cplusplus
  47 extern "C" {
  48 #endif
  49
  50 typedef void (signal_callback_fn)();
  51
  52 #ifdef  __cplusplus
  53 }
  54 #endif
  55
  56 namespace datadifferential {
  57 namespace util {
  58
  59 enum shutdown_t {
  60   SHUTDOWN_RUNNING,
  61   SHUTDOWN_GRACEFUL,
  62   SHUTDOWN_FORCED
  63 };
  64
  65 class SignalThread {
  66   bool _exit_on_signal;
  67   sigset_t set;
  68   sem_t lock;
  69   uint64_t magic_memory;
  70   volatile shutdown_t __shutdown;
  71   pthread_mutex_t shutdown_mutex;
  72
  73 public:
  74
  75   SignalThread(bool exit_on_signal_arg= false);
  76
  77   void test();
  78   void post();
  79   bool setup();
  80
  81   bool exit_on_signal()
  82   {
  83     return _exit_on_signal;
  84   }
  85
  86   int wait(int& sig)
  87   {
  88     return sigwait(&set, &sig);
  89   }
  90
  91   ~SignalThread();
  92
  93   void set_shutdown(shutdown_t arg);
  94   bool is_shutdown();
  95   shutdown_t get_shutdown();
  96
  97   void sighup();
  98   void sighup(signal_callback_fn* arg);
  99
 100 private:
 101   pthread_t thread;
 102   signal_callback_fn* _sighup;
 103 };
 104
 105 } /* namespace util */
 106 } /* namespace datadifferential */