ACE/examples/Shared_Malloc/Malloc.cpp

   1 #include "Options.h"
   2 #include "Malloc.h"
   3 #include "ace/MMAP_Memory_Pool.h"
   4 #include "ace/Local_Memory_Pool.h"
   5
   6 #ifndef ACE_LACKS_SYSV_SHMEM
   7 # include "ace/Shared_Memory_Pool.h"
   8 #endif  /* !ACE_LACKS_SYSV_SHMEM */
   9
  10 #ifndef ACE_LACKS_SBRK
  11 # include "ace/Sbrk_Memory_Pool.h"
  12 #endif  /* !ACE_LACKS_SBRK */
  13
  14 #include "ace/Process_Mutex.h"
  15 #include "ace/Malloc_T.h"
  16
  17
  18 // Strategic typedefs for memory allocation.
  19
  20 typedef ACE_Malloc <ACE_LOCAL_MEMORY_POOL, ACE_SYNCH_MUTEX> L_ALLOCATOR;
  21 typedef ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_Process_Mutex> M_ALLOCATOR;
  22
  23 #if defined (ACE_LACKS_SYSV_SHMEM)
  24 typedef ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_SYNCH_MUTEX> SP_ALLOCATOR;
  25 typedef ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_SYNCH_MUTEX> ST_ALLOCATOR;
  26 #else
  27 typedef ACE_Malloc <ACE_SHARED_MEMORY_POOL, ACE_Process_Mutex> SP_ALLOCATOR;
  28 typedef ACE_Malloc <ACE_SHARED_MEMORY_POOL, ACE_SYNCH_MUTEX> ST_ALLOCATOR;
  29 #endif /* ACE_LACKS_SYSV_SHMEM */
  30
  31 #if defined (ACE_LACKS_SBRK)
  32 typedef ACE_Malloc <ACE_LOCAL_MEMORY_POOL, ACE_SYNCH_MUTEX> SB_ALLOCATOR;
  33 #else
  34 typedef ACE_Malloc <ACE_SBRK_MEMORY_POOL, ACE_SYNCH_MUTEX> SB_ALLOCATOR;
  35 #endif /* ACE_LACKS_SBRK */
  36
  37 // Singleton
  38 ACE_Allocator *Malloc::instance_ = 0;
  39
  40 // This is a factory that decides what type of allocator to create.
  41
  42 ACE_Allocator *
  43 Malloc::instance ()
  44 {
  45   if (Malloc::instance_ == 0)
  46     {
  47       if (Options::instance ()->child ())
  48         Malloc::instance_ = new ACE_Allocator_Adapter<M_ALLOCATOR>;
  49       else if (Options::instance ()->spawn_threads ())
  50         {
  51           if (Options::instance ()->use_sbrk ())
  52             Malloc::instance_ = new ACE_Allocator_Adapter<SB_ALLOCATOR>;
  53           else if (Options::instance ()->use_shmem ())
  54             Malloc::instance_ = new ACE_Allocator_Adapter<ST_ALLOCATOR>;
  55           else
  56             Malloc::instance_ = new ACE_Allocator_Adapter<L_ALLOCATOR>;
  57         }
  58       else if (Options::instance ()->use_mmap ())
  59         Malloc::instance_ = new ACE_Allocator_Adapter<M_ALLOCATOR>;
  60       else // Use Shared_Memory_Pool.
  61         Malloc::instance_ = new ACE_Allocator_Adapter<SP_ALLOCATOR>;
  62     }
  63
  64   return Malloc::instance_;
  65 }
  66