Tries to become the owner of the specified context.
If some other thread is the owner of the context, returns false immediately. Ownership is properly recursive: the owner can require ownership again and will release ownership when release is called as many times as acquire.
You must be the owner of a context before you can call prepare, query, check, dispatch, release.
Since 2.76 this can be null to use the global-default main context.
this |
a MainContext (if null, the global-default main context will be used) |
true if the operation succeeded, and this thread is now the owner of this. |