ceph/src/include/on_exit.h

   1 #ifndef CEPH_ON_EXIT_H
   2 #define CEPH_ON_EXIT_H
   3
   4 #include <pthread.h>
   5 #include <vector>
   6
   7 #include "include/ceph_assert.h"
   8 /*
   9  * Create a static instance at the file level to get callbacks called when the
  10  * process exits via main() or exit().
  11  */
  12
  13 class OnExitManager {
  14   public:
  15     typedef void (*callback_t)(void *arg);
  16
  17     OnExitManager() {
  18       int ret = pthread_mutex_init(&lock_, NULL);
  19       ceph_assert(ret == 0);
  20     }
  21
  22     ~OnExitManager() {
  23       pthread_mutex_lock(&lock_);
  24       std::vector<struct cb>::iterator it;
  25       for (it = funcs_.begin(); it != funcs_.end(); it++) {
  26         it->func(it->arg);
  27       }
  28       funcs_.clear();
  29       pthread_mutex_unlock(&lock_);
  30     }
  31
  32     void add_callback(callback_t func, void *arg) {
  33       pthread_mutex_lock(&lock_);
  34       struct cb callback = { func, arg };
  35       funcs_.push_back(callback);
  36       pthread_mutex_unlock(&lock_);
  37     }
  38
  39   private:
  40     struct cb {
  41       callback_t func;
  42       void *arg;
  43     };
  44
  45     std::vector<struct cb> funcs_;
  46     pthread_mutex_t lock_;
  47 };
  48
  49 #endif