The EventLoop is now a wrapper around an EventLoopImplementation.
Our old EventLoop code has moved into EventLoopImplementationUnix and
continues to work as before.
The main difference is that all the separate thread_local variables have
been collected into a file-local ThreadData data structure.
The goal here is to allow running Core::EventLoop with a totally
different backend, such as Qt for Ladybird.
Similar to POSIX read, the basic read and write functions of AK::Stream
do not have a lower limit of how much data they read or write (apart
from "none at all").
Rename the functions to "read some [data]" and "write some [data]" (with
"data" being omitted, since everything here is reading and writing data)
to make them sufficiently distinct from the functions that ensure to
use the entire buffer (which should be the go-to function for most
usages).
No functional changes, just a lot of new FIXMEs.
This class had slightly confusing semantics and the added weirdness
doesn't seem worth it just so we can say "." instead of "->" when
iterating over a vector of NNRPs.
This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
This propagates errors from user-defined encoders up to IPC::Connection.
There, we currently just log the error, as we aren't in a position to
propagate it further (i.e. we are inside a deferred invocation).
Reading from a socket with a dead peer returns the `ECONNRESET` error
code in some cases on Linux. This commit changes LibIPC to gracefully
shut down the socket if that happens, fixing an occasional crash in
Ladybird.
FixesSerenityOS/ladybird#116
These lambdas were marked mutable as they captured a Ptr wrapper
class by value, which then only returned const-qualified references
to the value they point from the previous const pointer operators.
Nothing is actually mutating in the lambdas state here, and now
that the Ptr operators don't add extra const qualifiers these
can be removed.
This will allow Ladybird to use IPC::Connection without having an
actively running Core::EventLoop.
The abstraction here is not great, and we should think of something
nicer, but we have to start somewhere.
Our IPC protocol currently relies on the behavior of recvfd() and
sendfd() on SerenityOS, which provide an out-of-band queue that can be
accessed independently of the in-band data stream.
To make LibIPC usable on other platforms, this patch adds a mechanism
where IPC::Connection can be given a dedicated socket for FD passing.
This gives us the same behavior as the syscalls on SerenityOS, without
having to change the protocol implementation.
This is a quick and dirty fix to at least get the Inspector working
again. This is a very bad solution long term, because it will spin on
the EventLoop. That is why there is a message reminding everyone this
problem still needs to be fixed, every time this is actually done.
Error::from_string_literal now takes direct char const*s, while
Error::from_string_view does what Error::from_string_literal used to do:
taking StringViews. This change will remove the need to insert `sv`
after error strings when returning string literal errors once
StringView(char const*) is removed.
No functional changes.
Previously, an IPC connection error could shut down the entire process
without giving a hint as to what's wrong. Now, we report that error to
the debug console.
Previously we would shut down an ipc connection regardless of if there
were still bytes that have been read and not been handed over to
processing, causing WindowServer not to receive
WindowServer::SetFlashFlush messages sent by `wsctl -f` except the first
one.
This patch fixes that behavior by still shutting the connection down due
to having reached EOF while also processing remaining bytes.
Resolves#12954
See also #8912 which fixes the same issue that this patch fixes but also
seems to have initially broken SettingsWindow cancel not actually
closing the window unless the cursor got moved as described in #12003.
Pull request #12547 fixing the SettingsWindow behavior broke `wsctl`
again by always shutting down.
Apologies for the enormous commit, but I don't see a way to split this
up nicely. In the vast majority of cases it's a simple change. A few
extra places can use TRY instead of manual error checking though. :^)
This change unfortunately cannot be atomically made without a single
commit changing everything.
Most of the important changes are in LibIPC/Connection.cpp,
LibIPC/ServerConnection.cpp and LibCore/LocalServer.cpp.
The notable changes are:
- IPCCompiler now generates the decode and decode_message functions such
that they take a Core::Stream::LocalSocket instead of the socket fd.
- IPC::Decoder now uses the receive_fd method of LocalSocket instead of
doing system calls directly on the fd.
- IPC::ConnectionBase and related classes now use the Stream API
functions.
- IPC::ServerConnection no longer constructs the socket itself; instead,
a convenience macro, IPC_CLIENT_CONNECTION, is used in place of
C_OBJECT and will generate a static try_create factory function for
the ServerConnection subclass. The subclass is now responsible for
passing the socket constructed in this function to its
ServerConnection base; the socket is passed as the first argument to
the constructor (as a NonnullOwnPtr<Core::Stream::LocalServer>) before
any other arguments.
- The functionality regarding taking over sockets from SystemServer has
been moved to LibIPC/SystemServerTakeover.cpp. The Core::LocalSocket
implementation of this functionality hasn't been deleted due to my
intention of removing this class in the near future and to reduce
noise on this (already quite noisy) PR.
This lets us avoid using Core::deferred_invoke() which is not usable
during application teardown (as there is no event loop to push the
deferred invocation onto.)
(Not that there is an event loop to fire the processing timer during
teardown *either*, but at least we can exit gracefully with pending
timers, unlike deferred invocations, which hang the process. This is an
area where more improvements are definitely needed!)
This patch moves the templated message parsing code to a virtual
try_parse_messages() helper. By doing that, we can move the rest of the
socket draining code up to ConnectionBase and keep it out of line.
This patch splits IPC::Connection into Connection and ConnectionBase.
ConnectionBase moves into Connection.cpp so we don't have to inline it
for every single templated subclass.
