diff options
author | Oswald Buddenhagen <oswald.buddenhagen@nokia.com> | 2009-12-10 15:38:17 +0100 |
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committer | Oswald Buddenhagen <oswald.buddenhagen@nokia.com> | 2009-12-10 16:08:02 +0100 |
commit | b6352d487491e4d25db8a008de75280a666b0fce (patch) | |
tree | a6704970d5c472468724b38cdad4360cdc1f123c /src/corelib/tools/qlist.h | |
parent | 46e080ba1b0b7fdb67eda60002991f6b20e0f0ab (diff) |
add {QString,QByteArray,QList,QLinkedList,QHash,QMap,QVector}::isSharedWith()
these functions just compare the d pointers of two objects. this can be
used to verify the validity of cached data: you keep a copy of the
original data in your cache. consequently, any changes to the original
data must detach, so this function reflects whether the cached data is
still up-to-date.
of course, this is not thread safe, as the data might change right after
you check it, but that's a general problem of cache coherency which
needs to be handled further up the stack.
the functions are internal because the other detaching-related functions
are internal as well for reasons beyond me.
Reviewed-by: brad
Diffstat (limited to 'src/corelib/tools/qlist.h')
-rw-r--r-- | src/corelib/tools/qlist.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/corelib/tools/qlist.h b/src/corelib/tools/qlist.h index 49b5c0d019..e65ee1597e 100644 --- a/src/corelib/tools/qlist.h +++ b/src/corelib/tools/qlist.h @@ -130,6 +130,7 @@ public: inline bool isDetached() const { return d->ref == 1; } inline void setSharable(bool sharable) { if (!sharable) detach(); d->sharable = sharable; } + inline bool isSharedWith(const QList<T> &other) const { return d == other.d; } inline bool isEmpty() const { return p.isEmpty(); } |