Deferred decode for HELLO to prevent HELLOcalypse under high load of new peers.

This commit is contained in:
Adam Ierymenko 2015-11-05 12:22:58 -08:00
parent a95ff21aaf
commit 8ef4edebbf
12 changed files with 463 additions and 73 deletions

View file

@ -64,20 +64,6 @@ public:
++obj->__refCount;
}
SharedPtr(T *obj,bool runAwayFromZombies)
throw() :
_ptr(obj)
{
// HACK: this is used in "handlers" to take ownership of naked pointers,
// an ugly pattern that really ought to be factored out.
if (runAwayFromZombies) {
if ((int)(++obj->__refCount) < 2) {
--obj->__refCount;
_ptr = (T *)0;
}
} else ++obj->__refCount;
}
SharedPtr(const SharedPtr &sp)
throw() :
_ptr(sp._getAndInc())
@ -105,6 +91,25 @@ public:
return *this;
}
/**
* Set to a naked pointer and increment its reference count
*
* This assumes this SharedPtr is NULL and that ptr is not a 'zombie.' No
* checks are performed.
*
* @param ptr Naked pointer to assign
*/
inline void setToUnsafe(T *ptr)
{
++ptr->__refCount;
_ptr = ptr;
}
/**
* Swap with another pointer 'for free' without ref count overhead
*
* @param with Pointer to swap with
*/
inline void swap(SharedPtr &with)
throw()
{