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

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   3  *  Data Differential YATL (i.e. libtest)  library
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  36
  37 #pragma once
  38
  39 #include <unistd.h>
  40 #include <string>
  41 #include <signal.h>
  42
  43 #include <libtest/dream.h>
  44
  45 namespace libtest {
  46
  47 class Wait
  48 {
  49 public:
  50
  51   Wait(const std::string &filename, uint32_t timeout= 6) :
  52     _successful(false)
  53   {
  54     uint32_t waited;
  55     uint32_t this_wait;
  56     uint32_t retry;
  57
  58     if (filename.empty())
  59     {
  60       _successful= false;
  61       return;
  62     }
  63
  64     for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
  65     {
  66       if (access(filename.c_str(), R_OK) == 0)
  67       {
  68         _successful= true;
  69         break;
  70       }
  71       else if (waited >= timeout)
  72       {
  73         break;
  74       }
  75
  76       this_wait= retry * retry / 3 + 1;
  77       libtest::dream(this_wait, 0);
  78     }
  79   }
  80
  81   Wait(const pid_t &_pid_arg, uint32_t timeout= 6) :
  82     _successful(false)
  83   {
  84     uint32_t waited;
  85     uint32_t this_wait;
  86     uint32_t retry;
  87
  88     for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
  89     {
  90       if (kill(_pid_arg, 0) == 0)
  91       {
  92         _successful= true;
  93         break;
  94       }
  95       else if (waited >= timeout)
  96       {
  97         break;
  98       }
  99
 100       this_wait= retry * retry / 3 + 1;
 101       libtest::dream(this_wait, 0);
 102     }
 103   }
 104
 105   bool successful() const
 106   {
 107     return _successful;
 108   }
 109
 110 private:
 111   bool _successful;
 112 };
 113
 114 } // namespace libtest