ACE/ace/Thread_Exit.cpp

   1 #include "ace/Thread_Exit.h"
   2 #include "ace/Managed_Object.h"
   3 #include "ace/Thread_Manager.h"
   4 #include "ace/Guard_T.h"
   5
   6 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
   7
   8 bool ACE_Thread_Exit::is_constructed_ = false;
   9
  10 void
  11 ACE_Thread_Exit::cleanup (void *instance)
  12 {
  13   ACE_OS_TRACE ("ACE_Thread_Exit::cleanup");
  14
  15   delete (ACE_TSS_TYPE (ACE_Thread_Exit) *) instance;
  16
  17   // Set the thr_exit_ static to null to keep things from crashing if
  18   // ACE::fini() is enabled here.
  19   ACE_Thread_Manager::thr_exit_ = 0;
  20
  21   ACE_Thread_Exit::is_constructed_ = false;
  22   // All TSS objects have been destroyed.  Reset this flag so
  23   // ACE_Thread_Exit singleton can be created again.
  24 }
  25
  26 // NOTE: this preprocessor directive should match the one in
  27 // ACE_Task_Base::svc_run () below.  This prevents the two statics
  28 // from being defined.
  29
  30 ACE_Thread_Exit *
  31 ACE_Thread_Exit::instance (void)
  32 {
  33 #if defined (ACE_HAS_THREAD_SPECIFIC_STORAGE) || defined (ACE_HAS_TSS_EMULATION)
  34   ACE_OS_TRACE ("ACE_Thread_Exit::instance");
  35
  36   // Determines if we were dynamically allocated.
  37   static ACE_TSS_TYPE (ACE_Thread_Exit) * volatile instance_;
  38
  39   // Implement the Double Check pattern.
  40
  41   if (!ACE_Thread_Exit::is_constructed_)
  42     {
  43       ACE_MT (ACE_Thread_Mutex *lock =
  44               ACE_Managed_Object<ACE_Thread_Mutex>::get_preallocated_object
  45                 (ACE_Object_Manager::ACE_THREAD_EXIT_LOCK);
  46               ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, *lock, 0));
  47
  48       if (!ACE_Thread_Exit::is_constructed_)
  49         {
  50           ACE_NEW_RETURN (instance_,
  51                           ACE_TSS_TYPE (ACE_Thread_Exit),
  52                           0);
  53
  54           ACE_Thread_Exit::is_constructed_ = true;
  55
  56           ACE_Thread_Manager::set_thr_exit (instance_);
  57         }
  58     }
  59
  60   return ACE_TSS_GET (instance_, ACE_Thread_Exit);
  61 #else
  62   return 0;
  63 #endif /* ACE_HAS_THREAD_SPECIFIC_STORAGE || ACE_HAS_TSS_EMULATION */
  64 }
  65
  66 // Grab hold of the Task * so that we can close() it in the
  67 // destructor.
  68
  69 ACE_Thread_Exit::ACE_Thread_Exit (void)
  70 {
  71   ACE_OS_TRACE ("ACE_Thread_Exit::ACE_Thread_Exit");
  72 }
  73
  74 // Set the this pointer...
  75
  76 void
  77 ACE_Thread_Exit::thr_mgr (ACE_Thread_Manager *tm)
  78 {
  79   ACE_OS_TRACE ("ACE_Thread_Exit::thr_mgr");
  80
  81   if (tm != 0)
  82     this->thread_control_.insert (tm, 0);
  83 }
  84
  85 // When this object is destroyed the Task is automatically closed
  86 // down!
  87
  88 ACE_Thread_Exit::~ACE_Thread_Exit (void)
  89 {
  90   ACE_OS_TRACE ("ACE_Thread_Exit::~ACE_Thread_Exit");
  91 }
  92
  93 ACE_ALLOC_HOOK_DEFINE(ACE_Thread_Exit)
  94
  95 ACE_Thread_Exit_Maybe::ACE_Thread_Exit_Maybe (int flag)
  96   : instance_ (0)
  97 {
  98   if (flag)
  99     {
 100       ACE_NEW (instance_, ACE_Thread_Exit);
 101     }
 102 }
 103
 104 ACE_Thread_Exit_Maybe::~ACE_Thread_Exit_Maybe (void)
 105 {
 106   delete this->instance_;
 107 }
 108
 109 ACE_Thread_Exit *
 110 ACE_Thread_Exit_Maybe::operator -> (void) const
 111 {
 112   return this->instance_;
 113 }
 114
 115 ACE_Thread_Exit *
 116 ACE_Thread_Exit_Maybe::instance (void) const
 117 {
 118   return this->instance_;
 119 }
 120
 121 ACE_END_VERSIONED_NAMESPACE_DECL