dep/ACE_wrappers/ace/SV_Shared_Memory.cpp

   1 // $Id: SV_Shared_Memory.cpp 80826 2008-03-04 14:51:23Z wotte $
   2
   3 #include "ace/SV_Shared_Memory.h"
   4 #include "ace/Log_Msg.h"
   5
   6 #if !defined (__ACE_INLINE__)
   7 #include "ace/SV_Shared_Memory.inl"
   8 #endif /* __ACE_INLINE__ */
   9
  10 ACE_RCSID(ace, SV_Shared_Memory, "$Id: SV_Shared_Memory.cpp 80826 2008-03-04 14:51:23Z wotte $")
  11
  12 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  13
  14 ACE_ALLOC_HOOK_DEFINE(ACE_SV_Shared_Memory)
  15
  16 void
  17 ACE_SV_Shared_Memory::dump (void) const
  18 {
  19 #if defined (ACE_HAS_DUMP)
  20   ACE_TRACE ("ACE_SV_Shared_Memory::dump");
  21 #endif /* ACE_HAS_DUMP */
  22 }
  23
  24 // Creates a shared memory segment of SIZE bytes and *does* attach to
  25 // this segment.
  26
  27 int
  28 ACE_SV_Shared_Memory::open_and_attach (key_t external_id,
  29                                        size_t sz,
  30                                        int create,
  31                                        int perms,
  32                                        void *virtual_addr,
  33                                        int flags)
  34 {
  35   ACE_TRACE ("ACE_SV_Shared_Memory::open_and_attach");
  36   if (this->open (external_id, sz, create, perms) == -1)
  37     return -1;
  38   else if (this->attach (virtual_addr, flags) == -1)
  39     return -1;
  40   else
  41     return 0;
  42 }
  43
  44 // Constructor interface to this->open_and_attach () member function.
  45
  46 ACE_SV_Shared_Memory::ACE_SV_Shared_Memory (key_t external_id,
  47                                             size_t sz,
  48                                             int create,
  49                                             int perms,
  50                                             void *virtual_addr,
  51                                             int flags)
  52 {
  53   ACE_TRACE ("ACE_SV_Shared_Memory::ACE_SV_Shared_Memory");
  54   if (this->open_and_attach (external_id, sz, create,
  55                              perms, virtual_addr, flags) == -1)
  56     ACE_ERROR ((LM_ERROR, ACE_TEXT ("%p\n"),
  57                 ACE_TEXT ("ACE_SV_Shared_Memory::ACE_SV_Shared_Memory")));
  58 }
  59
  60 // The "do nothing" constructor.
  61
  62 ACE_SV_Shared_Memory::ACE_SV_Shared_Memory (void)
  63   : internal_id_ (0),
  64     size_ (0),
  65     segment_ptr_ (0)
  66 {
  67   ACE_TRACE ("ACE_SV_Shared_Memory::ACE_SV_Shared_Memory");
  68 }
  69
  70 // Added this constructor to accept an internal id, the one generated
  71 // when a server constructs with the key IPC_PRIVATE.  The client can
  72 // be passed ACE_SV_Shared_Memory::internal_id via a socket and call
  73 // this construtor to attach the existing segment.  This prevents
  74 // having to hard-code a key in advance.  Courtesy of Marvin Wolfthal
  75 // (maw@fsg.com).
  76
  77 ACE_SV_Shared_Memory::ACE_SV_Shared_Memory (ACE_HANDLE int_id,
  78                                             int flags)
  79   : internal_id_ (int_id),
  80     size_ (0)
  81 {
  82   ACE_TRACE ("ACE_SV_Shared_Memory::ACE_SV_Shared_Memory");
  83   if (this->attach (0, flags) == -1)
  84     ACE_ERROR ((LM_ERROR, ACE_TEXT ("%p\n"),
  85                 ACE_TEXT ("ACE_SV_Shared_Memory::ACE_SV_Shared_Memory")));
  86 }
  87
  88 ACE_END_VERSIONED_NAMESPACE_DECL