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| author | Ben Murdoch <benm@google.com> | 2009-08-11 17:01:47 +0100 |
|---|---|---|
| committer | Ben Murdoch <benm@google.com> | 2009-08-11 18:21:02 +0100 |
| commit | 0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5 (patch) | |
| tree | 2943df35f62d885c89d01063cc528dd73b480fea /JavaScriptCore/wtf/StdLibExtras.h | |
| parent | 7e7a70bfa49a1122b2597a1e6367d89eb4035eca (diff) | |
| download | external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.zip external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.tar.gz external_webkit-0bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5.tar.bz2 | |
Merge in WebKit r47029.
Diffstat (limited to 'JavaScriptCore/wtf/StdLibExtras.h')
| -rw-r--r-- | JavaScriptCore/wtf/StdLibExtras.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/StdLibExtras.h b/JavaScriptCore/wtf/StdLibExtras.h index afc5e8a..d21d1ff 100644 --- a/JavaScriptCore/wtf/StdLibExtras.h +++ b/JavaScriptCore/wtf/StdLibExtras.h @@ -41,6 +41,11 @@ static type& name = *new type arguments #endif +// OBJECT_OFFSETOF: Like the C++ offsetof macro, but you can use it with classes. +// The magic number 0x4000 is insignificant. We use it to avoid using NULL, since +// NULL can cause compiler problems, especially in cases of multiple inheritance. +#define OBJECT_OFFSETOF(class, field) (reinterpret_cast<ptrdiff_t>(&(reinterpret_cast<class*>(0x4000)->field)) - 0x4000) + namespace WTF { /* |