By take and releasing locks twice per channel in the case where nothing
is reading, there was an opportunity for ev/select to hang in the
multithreaded case. Also silence valgrind/helgrind errors.
Like getcstring, but operates on a byteview.
When writing bindings (i.e what capi.c is primarily used for), it's
common to want to accept a buffer *or* a string rather than just
a string.
For this, a byteview is perfect (and why not accept keywords while
you're at it?).
However, there's no built-in function for getting a cstring out of
a byteview, this adds one.
This also reformulates getcstring to be an edge-case of getcbytes
(simply adding an explicit check for stringness).
This turns splices that are ignored into compiler errors. Other
alternatives here should also be considered, for example making this
a compiler warning rather than an error. For example, the latest
spork as of a3ee63c137ee3234987dbbca71b566994ff8ae8c has an error of this
kind, but the resulting program does work correctly.
Also disallow splice propagation - code of the
form (+ 1 (do ;[2 3 4]) 5).
These now have semantic menaings that are pretty difficult to
work around. Code that tries to maniuplate user8 and user9 signals
right now may be affected
When peg/replace or peg/replace-all are given a function to serve as the text
replacement, any captures produced by the PEG are passed as additional
arguments to that function.
Functions will be invoked with the matched text, and their result will be
coerced to a string and used as the new replacement text.
This also allows passing non-function, non-byteviewable values, which will be
converted into strings during replacement (only once, and only if at least
one match is found).
there was a request to improve the error message, but the whole function
has non-informative errors. (both functions, actually, since the code is
duplicated)
as such, instead of catching it directly, address the assumption that
led to the SIGSEGV and let it be caught by the functions themselves,
thus reusing existing error messages (which can then be improved
separately).
When there is no format to be found after a %, get_fmt_mapping returns
NULL. It then gets called against strlen, which is a typical SEGV.
Check for NULL aginst mapping, which signals a null format being
specified.
While the old behavior was reasonable, it is not spelled out anywhere
in the documentation and was incidental rather than intentional.
Parameters of the same name of the function should probably take
precedence on name collision, following the principle of least surprise.
Comparison between different bracket and normal tuples
will now take into account the delimiter type. This solves strange
non-locality issues in the compiler due to this false equality, and is
more consistent with Janet's otherwise strong equality philosophy.
buffer/blit is difficult to use, and while buffer/push is the easiet
buffer manipulation function to use it only appends to the buffer.
buffer/push-at lets users manipulate buffers at any index - useful
for buffers used as an in-memory databases, for example.
Added underlying buffer support for buffer instances that cannot
reallocated underlying memory - useful for (small) memory mapped
files and other FFI utilties.
Doesn't really impart (much) file systtem information when used, and
can be used for a lot of things where file functions are used to process
in a stream.
The sandboxing API is meant to make janet a bit more attractive
for certain application embedding use cases. The sandboxing API
puts limits on what system resources the interpreter can access.
Upvalues are stored in the symbol slots structure as well, but
since they are always live, we repurpose the death_pc field to
refer to the environment index that we want to look at at runtime.
Set an internal flag that disables garbage collection on such
buffers. For all currently correct usage, this should have no effect,
and will fix use cases where buffers are initialized this way and then
passed to the interpreter.
Very "unsafe", but a good tool of last resort. In most cases
a buffer is preferable, but the lifetime can be a bit unclear.
This allows very granular control over memory.
Allow more easily importing modules from custom directories
without jumping through too many hoops. Technically, this was
possible before but required circumventing the built-in module/paths
and was just a hassle.
Also add entries to module/path (and module/add-path) to allow code
like the following.
(setdyn :my-libs "/home/me/janet-stuff/")
(import @my-libs/toolbox)
Intended for things like test harnesses where code might not
be installed to the usual directories.
