The main issue was cancellation of fiber using `cancel` rather than
`ev/cancel` could cause issues with the event loop internal ref count.
Since this is almost certainly bad usage (and is not something I want to
encourage or support), we will warn against trying to resume or error
fibers that have already been suspended or scheduled on the event loop.
The distinction between "task" fibers and normal fibers is now kept by a
flag that is set when a fiber is resumed - if it is the outermost fiber
on the stack, it is considered a root fiber. All fibers scheduled with
ev/go or by the event loop are root fibers, and thus cannot be cancelled
or resumed with `cancel` or `resume` - instead, use `ev/cancel` or
`ev/go`.
Nested expression in the quasiquote were being compiled with the "hint"
flag passed to the expression compilation, essentially telling the
compiler to put intermediates into the final slot, possibly overwriting
other intermediate values. This fix removes that flags on any recursive
calls to quasiquote.
Many system I/O operations can fail due to being interrupted by a
signal. In the REPL's case, this poses a problem because in most cases
it's assumed that a read error is not recoverable and is equivalent to
EOF. This, however, is not the case for EINTR, in which case the I/O
should be tried again.
This commit fixes the most egregious violations of this, notably the
line getters, which would otherwise make the REPL exit on any signal,
even if the signal was caught and processed outside the REPL's purview.
The current destructure pattern ends when '& is encountered.
This commit adds an error if it is followed by more than
a symbol to bind the array to.
Although its not critical since the extra items can be ignored,
they're a sign of some kind of mistake so its best to complain.
In destructure janet_type(_) == JANET_SYMBOL was used to check if a
value was a symbol.
This commit replaces that with the janet_checktype function,
because that function is used for the same purpose in other places.
This commit adds three checks to ensure & rest patterns are valid:
1. When checking for '& ensure the value is a symbol before unwrapping
2. Make sure '& is followed by a value
3. Make sure the value following '& is a symbol
This commit adds support for using & _ syntax to bind the remaining
values in an array in the match macro.
The commit also adds a few tests for the new syntax in suite0008
Add support for using [& rest] to match the remaining values
in an array or tuple when destructuring.
the rest pattern is implemented by pushing remaining values in the
rhs to the stack once & is found on the lhs.
Then tuple is called and the result is assigned
to the next symbol on the lhs.
This commit DOES NOT implement handling for malformed patterns.
handles returned by CreateFileA and FILE_FLAG_OVERLAPPED
support reading from arbitrary offsets.
The offset is passed to ReadFile in through the OVERLAPPED structure.
Since state->overlapped is zeroed ev_machine_read
ReadFile would always read from the start of the file and never finish
This commit changes ev_machine_read to update the offset to
the number of bytes read before calling ReadFile.
- Change the global binding name from :redefs to :redef
- Simplify internal representation of "redefinable bindings"
- Store "redefinable bindings in :ref rather than :value inside the
environment entries. This makes such bindings more like vars that
can't be set rather than defs.
Rather than manual reference counting for suspended fibers, we
automate the process by incrementing "extra_listeners" every time
we suspend a fiber in the event loop, and decrement when that fiber
is resumed. In this manner, we keep track of the number of suspending
fibers in a simpler, more correct way.
Try to have better behavior when mixing sub-hashes that are not uniform and
randomly distributed. Premultiply by a large prime before mixing to
"spread entropy" if it is concentrated in a certain subset of bits.
This doesn't destory the pid until the original thread decides to
call waitpid again. Since the pid is exposed in the C API and now
in the Janet API, we don't want to destroy it until we are ready.
This at least means users can use something like jsys
or the kill command to signal processes when they want
to send unsupported signals (like SIGTERM).
We were casting a pointer to the wrong type, which caused all sorts of
wonderful chaos, but only on windows and only when the garbage collector
ran after setting up a server in a specific configuration. We were
casting a closure pointer to an abstract type during the mark phase,
which resulted in memory corruption.
We did not allow arbitrary utf8 to be printed with %j, even though the parser
allows. Thos changes uses the existing built in utf8 detectiotion to
exclude only unprintable symbols from the docstring.
Priorly we only checked exactly one state when an event was received.
This was incorrect. A state may have a next state, an action to take
after the first in the list of states has been taken. This change
acknowledges that and makes the code work with the state list vs just
the head of the list.
Don't use a timer filter, just set the timeout on each call to kevent.
Should hopefully work around the 1ms minimum on NetBSD and be possibly
more performant.
FreeBSD is the only BSD supporting ABSTIME timers, whereas the rest
demand intervals. Janet operates on timestamps, which are absolute
times, as per ABSTIME. The idea was to use that under FreeBSD but not
the other BSDs. This commit changes that since ABSTIME breaks when the
timeout supplied is for a time prior to whatever the time is
now (invalid argument). We now utilize the same logic we use on the
other BSDs with FreeBSD to effect interval timeouts since intervals are
absolutely sometime beyond now, be it now and less than a millisecond,
or more than a millisecond. This will hopefully unbreak BSD builds when
running the test suite.
After the UB was fixed in value.c, I tried running the build again and encoutered another instance of UB in gc.c. With this fixed I can now build janet with ubsan enabled, meaning there's no more UB encountered in janet_boot during the build.
The `janet_get_addrinfo` function retained code that was meant for
compliance with 3 separate function signatures under a single function
name. Changing things to be a single function signature was broken until
the code pertaining to the aforementioned was stripped out.
Prior commits was an attempt to make this one function adhere to 3
different function signatures! This puts an end to that and makes it
where it's a single function signature and if one wants to use the 4th
argument they'll need to explicitly set the 3rd argument (to nil for
default).
janet_get_sockettype expects a keyword but we're making it optional that
the call to the functions that use it with arity >=3 will be guaranteed
to have it as a keyword value! If it's not a keyword then it's the same
as NULL.
Primarily because trying to check the value results in a panic when the
value is not the type of value requested from the API. Also probably
cheaper and the previous idea of just getting the value then comparing
was pretty stupid (needed a string comparison... and was going to do
pointer comparison).
This will allow us to set the address we use for outgoing connections.
Builds, haven't checked it passes current tests, haven't checked it
actually works either.
Minimum interval for a timer must be 1 or more (or we get EINVAL) and
Janet fails tests and halts events that the programmer may still be
interested in.
A comptime known value of 0 for data in EV_SET with EVFILT_TIMER causes
a complete compilation failure (fails to link). This fixes it by making
it a 1 instead of a 0 for amount of milliseconds in the interval to wait
under NetBSD.
NetBSD and OpenBSD lack NOTE_ABSTIME and NOTE_MSECONDS, so we define
those and create a macro that we use for all timeout values in EV_TIMER
events that will on all BSD excepting FreeBSD change an absolute time
into an interval.
Checking throught NetBSD's man pages, excepting for NetBSD-current,
NetBSD uses `intptr_t` as the type for `.udata`. This change allows for
`.udata` to match whatever type (by cast) the underlying system uses.
Pretty obvious I thought control statements were glued to their opening
parenthesis at first and then I realized not and voila, a bundle of
mixed style. Hopefully this fixes all of it.
From this point things should be bug fixes or code formatting most
likely.
Updated commentary (removed superfluous comments, and commented out
code). Refined commentary where it seemed important and may help whoever
comes behind me keep from making bad assumptions similar to the ones I
made.
All tests ran with `gmake test` now pass. `valgrind` with FreeBSD does
not support forking so `gmake valtest` fails once child processes are
started. Determined not an issue, can't fix valgrind.
Need to guard against errors when reading/writing probably, if there is
an error, forgo those events.
Guard against null state (and the byproduct, a segfault), check if the
state is null before utilizing it.
Note that this is a work in progress and simply a first attempt at
getting some code into place before being able to test it. This code
follows of sorts both the poll and epoll sections of the codebase hoping
to achieve the exact same.
Relax check that number of closure environments in a function matches
that of the def.
The def could be partially constructed, and so there may be a false
negative. The runtime will check that this is consistent, and the
garbage collector should handle when this constraint is not kept.
A threaded abstract is an abstract type that can be freely shared
between threads. While no synchronization is provided, refcounting
and transport between threads is. This will let implementers more easily
exploit OS-level parallelism in C library code. The caveat with these
types is that they need to be careful in how they interact with objects
on other heaps.
Some pointer casting with abstract types was incorrect, resulting
in strange behavior when trying to use supervisor channels that were
threaded. This fix also adds the ability to supply a supervisor channel
directly when creating a thread.
Introduces close semtantics to channels as well, but otherwise
threaded channels behave much like non-threaded channels. They have
different marshalling behavior though, and can only send values over by
packing and unpacking them. For now, this means only primitive values
although this will be expanded.
Also missing some implementation for closing threaded channels, and a
whole lot of testing. Achtung!, Caveat emptor, here be dragons and bugs.
This makes certain algorithms simpler as channels
now have an explicit lifetime - multiple readers can coordinate
closing without needing to ensure the same number of reads as writes.
