Please update comment in include/v8.h to sya that GetIdentityHash() will never return 0. /Søren
On Wed, Apr 29, 2009 at 03:50, <asarg...@chromium.org> wrote: > > Reviewers: iposva, > > Description: > Make Object::GetIdentityHash() never return 0. > > This is convenient when using identity hashes in data structures that > want to reserve 0 as a sentinel value, such as WebKit's WTF::HashMap. > > > Please review this at http://codereview.chromium.org/100147 > > SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/ > > Affected files: > M src/api.cc > > > Index: src/api.cc > =================================================================== > --- src/api.cc (revision 1810) > +++ src/api.cc (working copy) > @@ -2072,7 +2072,12 @@ > if (hash->IsSmi()) { > hash_value = i::Smi::cast(*hash)->value(); > } else { > - hash_value = random() & i::Smi::kMaxValue; // Limit range to fit a > smi. > + int attempts = 0; > + do { > + hash_value = random() & i::Smi::kMaxValue; // Limit range to fit a > smi. > + attempts++; > + } while (hash_value == 0 && attempts < 30); > + hash_value = hash_value != 0 ? hash_value : 1; // never return 0 > i::SetProperty(hidden_props, > hash_symbol, > i::Handle<i::Object>(i::Smi::FromInt(hash_value)), > > > > > > --~--~---------~--~----~------------~-------~--~----~ v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev -~----------~----~----~----~------~----~------~--~---
