git.m6w6.name Git - m6w6/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 namespace datadifferential {
  47 namespace util {
  48
  49 enum shutdown_t {
  50   SHUTDOWN_RUNNING,
  51   SHUTDOWN_GRACEFUL,
  52   SHUTDOWN_FORCED
  53 };
  54
  55 class SignalThread {
  56   bool _exit_on_signal;
  57   sigset_t set;
  58   sem_t lock;
  59   uint64_t magic_memory;
  60   volatile shutdown_t __shutdown;
  61   pthread_mutex_t shutdown_mutex;
  62   pthread_t thread;
  63
  64 public:
  65
  66   SignalThread(bool exit_on_signal_arg= false);
  67
  68   void test();
  69   void post();
  70   bool setup();
  71
  72   bool exit_on_signal()
  73   {
  74     return _exit_on_signal;
  75   }
  76
  77   int wait(int& sig)
  78   {
  79     return sigwait(&set, &sig);
  80   }
  81
  82   ~SignalThread();
  83
  84   void set_shutdown(shutdown_t arg);
  85   bool is_shutdown();
  86   shutdown_t get_shutdown();
  87 };
  88
  89 } /* namespace util */
  90 } /* namespace datadifferential */