ACE/ace/System_Time.cpp

   1 #include "ace/System_Time.h"
   2 #include "ace/MMAP_Memory_Pool.h"
   3 #include "ace/Malloc_T.h"
   4 #include "ace/Null_Mutex.h"
   5 #include "ace/Time_Value.h"
   6 #include "ace/Lib_Find.h"
   7
   8 #include "ace/OS_NS_string.h"
   9 #include "ace/OS_NS_time.h"
  10
  11
  12
  13 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  14
  15 ACE_System_Time::ACE_System_Time (const ACE_TCHAR *poolname)
  16   : shmem_ (0)
  17   , delta_time_ (0)
  18 {
  19   ACE_TRACE ("ACE_System_Time::ACE_System_Time");
  20
  21   // Only create a new unique filename for the memory pool file
  22   // if the user didn't supply one...
  23   if (poolname == 0)
  24     {
  25 #if defined (ACE_DEFAULT_BACKING_STORE)
  26       // Create a temporary file.
  27       ACE_OS::strcpy (this->poolname_,
  28                       ACE_DEFAULT_BACKING_STORE);
  29 #else /* ACE_DEFAULT_BACKING_STORE */
  30       if (ACE::get_temp_dir (this->poolname_,
  31                                       MAXPATHLEN - 17) == -1)
  32         // -17 for ace-malloc-XXXXXX
  33         {
  34           ACELIB_ERROR ((LM_ERROR,
  35                       ACE_TEXT ("Temporary path too long, ")
  36                       ACE_TEXT ("defaulting to current directory\n")));
  37           this->poolname_[0] = 0;
  38         }
  39
  40       // Add the filename to the end
  41       ACE_OS::strcat (this->poolname_, ACE_TEXT ("ace-malloc-XXXXXX"));
  42
  43 #endif /* ACE_DEFAULT_BACKING_STORE */
  44     }
  45   else
  46     ACE_OS::strsncpy (this->poolname_,
  47                       poolname,
  48                       (sizeof this->poolname_ / sizeof (ACE_TCHAR)));
  49
  50   ACE_NEW (this->shmem_,
  51            ALLOCATOR (this->poolname_));
  52 }
  53
  54 ACE_System_Time::~ACE_System_Time (void)
  55 {
  56   ACE_TRACE ("ACE_System_Time::~ACE_System_Time");
  57   delete this->shmem_;
  58 }
  59
  60 // Get the local system time.
  61
  62 int
  63 ACE_System_Time::get_local_system_time (time_t & time_out)
  64 {
  65   ACE_TRACE ("ACE_System_Time::get_local_system_time");
  66   time_out = ACE_OS::time (0);
  67   return 0;
  68 }
  69
  70 int
  71 ACE_System_Time::get_local_system_time (ACE_Time_Value &time_out)
  72 {
  73   ACE_TRACE ("ACE_System_Time::get_local_system_time");
  74   time_out.set (ACE_OS::time (0), 0);
  75   return 0;
  76 }
  77
  78 // Get the system time of the central time server.
  79
  80 int
  81 ACE_System_Time::get_master_system_time (time_t &time_out)
  82 {
  83   ACE_TRACE ("ACE_System_Time::get_master_system_time");
  84
  85   if (this->delta_time_ == 0)
  86     {
  87       // Try to find it
  88       void * temp = 0;
  89       if (this->shmem_->find (ACE_DEFAULT_TIME_SERVER_STR, temp) == -1)
  90         {
  91           // No time entry in shared memory (meaning no Clerk exists)
  92           // so return the local time of the host.
  93           return this->get_local_system_time (time_out);
  94         }
  95       else
  96         // Extract the delta time.
  97         this->delta_time_ = static_cast<long *> (temp);
  98     }
  99
 100   time_t local_time;
 101
 102   // If delta_time is positive, it means that the system clock is
 103   // ahead of our local clock so add delta to the local time to get an
 104   // approximation of the system time. Else if delta time is negative,
 105   // it means that our local clock is ahead of the system clock, so
 106   // return the last local time stored (to avoid time conflicts).
 107   if (*this->delta_time_ >= 0 )
 108     {
 109       this->get_local_system_time (local_time);
 110       time_out = local_time + static_cast<ACE_UINT32> (*this->delta_time_);
 111     }
 112   else
 113     // Return the last local time. Note that this is stored as the
 114     // second field in shared memory.
 115     time_out = *(this->delta_time_ + 1);
 116   return 0;
 117 }
 118
 119 int
 120 ACE_System_Time::get_master_system_time (ACE_Time_Value &time_out)
 121 {
 122   ACE_TRACE ("ACE_System_Time::get_master_system_time");
 123   time_t to;
 124   if (this->get_master_system_time (to) == -1)
 125     return -1;
 126   time_out.sec (to);
 127   return 0;
 128 }
 129
 130 // Synchronize local system time with the central time server using
 131 // specified mode (currently unimplemented).
 132
 133 int
 134 ACE_System_Time::sync_local_system_time (ACE_System_Time::Sync_Mode)
 135 {
 136   ACE_TRACE ("ACE_System_Time::sync_local_system_time");
 137   ACE_NOTSUP_RETURN (-1);
 138 }
 139
 140 ACE_END_VERSIONED_NAMESPACE_DECL