Not that this is deliberately de-optimizing performance: Now, the HandleError
functions need to use the nsDependentCString constructor to determine the
length of the literals at run-time, since that's lost. While passing that
in addition would reduce the binary size wins again, and is not necessary,
since this code is only called in error situations, which are not
performance-critical.
Differential Revision: https://phabricator.services.mozilla.com/D89148
The kinda hacky mutex latch is preserved to avoid concerns with AtStartup prefs having
potential to deadlock when used in this subsystem.
Differential Revision: https://phabricator.services.mozilla.com/D83403
Storage events are fired either directly after getting response from synchronous SetItem call or through observers. When a new onstorage event listener is added, we sycnhronously register an observer in the parent process. There's always only one observer actor per content process.
PBackgroundLSDatabase is now managed by a new PBackgroundLSObject protocol. PBackgroundLSObject is needed to eliminate the need to pass the principal info and document URI everytime a write operation occurs.
Preparation of an observer shares some states with preparation of a datastore, so common stuff now lives in LSRequestBase and preparation of a datastore now implements a nested state machine.
This patch was enhanced by asuth to drop observers only when the last storage listener is removed.
EventListenerRemoved is invoked on any removal, not just the final removal, so we need to make sure it's the final removal before dropping observer.
This adds a new quota client implementation, but only implements ShutdownWorkThreads.
At shutdown we wait for all running operations to finish including database actors which are closed by using an extra IPC message which avoids races between the parent and child.
Databases are dropped on the child side as soon as they are not used (e.g. after unlinking by the cycle collector).
The implementation is based on a cache (datastore) living in the parent process and sync IPC calls initiated from content processes.
IPC communication is done using per principal/origin database actors which connect to the datastore.
The synchronous blocking of the main thread is done by creating a nested event target and spinning the event loop.
Jan Varga
Simon Giesecke
Sylvestre Ledru
Butkovits Atila
Alexis Beingessner
Ciure Andrei
Jan Varga