ACE/apps/JAWS3/jaws3/FILE.cpp

   1 #include "ace/config-all.h"
   2 #include "ace/Guard_T.h"
   3 #include "ace/Synch_Traits.h"
   4 #include "ace/Thread_Mutex.h"
   5
   6 #ifndef JAWS_BUILD_DLL
   7 #define JAWS_BUILD_DLL
   8 #endif
   9
  10 #include "jaws3/FILE.h"
  11
  12
  13 JAWS_FILE::JAWS_FILE ()
  14   : map_ (0)
  15   , can_map_ (0)
  16 {
  17 }
  18
  19 JAWS_FILE::~JAWS_FILE ()
  20 {
  21   delete this->map_;
  22   this->map_ = 0;
  23 }
  24
  25 ACE_Mem_Map *
  26 JAWS_FILE::mem_map (int length,
  27                     int prot,
  28                     int share,
  29                     void *addr,
  30                     ACE_OFF_T offset,
  31                     LPSECURITY_ATTRIBUTES sa) const
  32 {
  33   if (this->can_map_ == 0)
  34     return 0;
  35
  36   JAWS_FILE *mutable_this = (JAWS_FILE *) this;
  37   return mutable_this->mem_map (length, prot, share, addr, offset, sa);
  38 }
  39
  40 ACE_Mem_Map *
  41 JAWS_FILE::mem_map (int length,
  42                     int prot,
  43                     int share,
  44                     void *addr,
  45                     ACE_OFF_T offset,
  46                     LPSECURITY_ATTRIBUTES sa)
  47 {
  48   if (this->can_map_ == 0)
  49     return 0;
  50
  51   if (this->map_ == 0)
  52     {
  53       ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, g, this->lock_, 0);
  54
  55       if (this->map_ == 0)
  56         {
  57           this->map_ = new ACE_Mem_Map;
  58           if (this->map_ != 0)
  59             {
  60               int r = this->map_->map (this->get_handle (),
  61                                        static_cast<size_t> (length),
  62                                        prot,
  63                                        share,
  64                                        addr,
  65                                        offset,
  66                                        sa);
  67               if (r < 0)
  68                 {
  69                   delete this->map_;
  70                   this->map_ = 0;
  71                 }
  72             }
  73         }
  74     }
  75
  76   return this->map_;
  77 }
  78
  79
  80 ACE_Mem_Map *
  81 JAWS_FILE::map () const
  82 {
  83   return this->map_;
  84 }
  85
  86 void
  87 JAWS_FILE::can_map (int flag)
  88 {
  89   this->can_map_ = (flag != 0);
  90 }