gearman/libtest/signal.h

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 *  Data Differential YATL (i.e. libtest)  library
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#pragma once 

#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <random>

enum shutdown_t {
  SHUTDOWN_RUNNING,
  SHUTDOWN_GRACEFUL,
  SHUTDOWN_FORCED
};

namespace libtest {

class SignalThread {
  sigset_t set;
  sem_t *lock;
  uint64_t magic_memory;
  volatile shutdown_t __shutdown;
  pthread_mutex_t shutdown_mutex;
  pthread_t thread;
  sigset_t original_set;

  std::string random_lock_name(std::string::size_type);

public:

  SignalThread();
  ~SignalThread();

  void test();
  void post();
  bool setup();
  bool unblock();

  int wait(int& sig)
  {
    return sigwait(&set, &sig);
  }

  void set_shutdown(shutdown_t arg);
  bool is_shutdown();
  shutdown_t get_shutdown();
};

} // namespace libtest