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| author | Volker Hilsheimer <volker.hilsheimer@qt.io> | 2019-08-21 10:05:33 +0200 |
|---|---|---|
| committer | Volker Hilsheimer <volker.hilsheimer@qt.io> | 2019-08-21 11:27:10 +0200 |
| commit | c4aa90cb566a58ce3e2a18de134b83d0a959fed2 (patch) | |
| tree | 6a004d90130f61ae0021e7beeb98921b90e7bc77 /src/corelib/kernel/qmetaobject.cpp | |
| parent | 626340d45882c7dcb9e56e7bdbae38f04a5b1cd1 (diff) | |
Point out that dynamically modified meta objects are not threadsafe
Given that this is an exception, it doesn't invalidate the general
thread-safety of static meta objects, and putting a locking mechanism
into Qt for this would be complete over- (and performance-)kill.
Task-number: QTBUG-70915
Change-Id: I4a538b977f5c2e8173cb236023e5d9ca34add5b5
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Diffstat (limited to 'src/corelib/kernel/qmetaobject.cpp')
| -rw-r--r-- | src/corelib/kernel/qmetaobject.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/corelib/kernel/qmetaobject.cpp b/src/corelib/kernel/qmetaobject.cpp index 666bb6eace..927d03f830 100644 --- a/src/corelib/kernel/qmetaobject.cpp +++ b/src/corelib/kernel/qmetaobject.cpp @@ -112,6 +112,13 @@ QT_BEGIN_NAMESPACE are returned by classInfo(), and you can search for pairs with indexOfClassInfo(). + \note Operations that use the meta object system are generally thread- + safe, as QMetaObjects are typically static read-only instances + generated at compile time. However, if meta objects are dynamically + modified by the application (for instance, when using QQmlPropertyMap), + then the application has to explicitly synchronize access to the + respective meta object. + \sa QMetaClassInfo, QMetaEnum, QMetaMethod, QMetaProperty, QMetaType, {Meta-Object System} */ |