git.m6w6.name Git - awesomized/libmemcached/blob - libtest/wait.h

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Data Differential YATL (i.e. libtest)  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 <unistd.h>
  40 #include <string>
  41 #include <csignal>
  42
  43 #include <sys/types.h>
  44 #include <libtest/dream.h>
  45
  46 namespace libtest {
  47
  48 class Wait
  49 {
  50 public:
  51
  52   Wait(const std::string &filename, uint32_t timeout= 6) :
  53     _successful(false)
  54   {
  55     uint32_t waited;
  56     uint32_t this_wait;
  57     uint32_t retry;
  58
  59     if (filename.empty())
  60     {
  61       _successful= false;
  62       return;
  63     }
  64
  65     for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
  66     {
  67       if (access(filename.c_str(), R_OK) == 0)
  68       {
  69         _successful= true;
  70         break;
  71       }
  72       else if (waited >= timeout)
  73       {
  74         break;
  75       }
  76
  77       this_wait= retry * retry / 3 + 1;
  78       libtest::dream(this_wait, 0);
  79     }
  80   }
  81
  82   Wait(const pid_t &_pid_arg, uint32_t timeout= 6) :
  83     _successful(false)
  84   {
  85     uint32_t waited;
  86     uint32_t this_wait;
  87     uint32_t retry;
  88
  89     for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
  90     {
  91       if (kill(_pid_arg, 0) == 0)
  92       {
  93         _successful= true;
  94         break;
  95       }
  96       else if (waited >= timeout)
  97       {
  98         break;
  99       }
 100
 101       this_wait= retry * retry / 3 + 1;
 102       libtest::dream(this_wait, 0);
 103     }
 104   }
 105
 106   bool successful() const
 107   {
 108     return _successful;
 109   }
 110
 111 private:
 112   bool _successful;
 113 };
 114
 115 } // namespace libtest