Newrt file io #8655
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Newrt file io #8655
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For pipe support, I started adding a few basic capabilities for |
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@olsonjeffery This is really amazing. Thanks so much! I think the main things to do here before merging are change the tmp files and fix the signal handling. The remaining design issues can be iterated on. |
the test "touch"es a new file
…ended - change all uses of Path in fn args to &P - FileStream.read assumptions were wrong (libuv file io is non-positional) - the above will mean that we "own" Seek impl info .. should probably push it in UvFileDescriptor.. - needs more tests
bors
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Aug 23, 2013
This PR includes the addition of the essential CRUD functionality exposed as a part of the `uv_fs_*` api. There's a lot more to be done, but the essential abstractions are in place and can be easily expanded. A summary: * `rt::io::file::FileStream` is fleshed out and behaves as a *non-positional* file stream (that is, it has a cursor that can be viewed/changed via `tell` and `seek` * The underlying abstraction in `RtioFileStream` exposes pairs of `read(), write()` and `pread(), pwrite()`. The latter two take explicit `offset` params and don't respect the current cursor location in a file afaik. They both use the same underlying libuv impl * Because libuv explicitly does *not* support `seek`/`tell` operations, these are impl'd in `UvFileStream` by using `lseek(2)` on the raw file descriptor. * I did my best to flesh out and adhere to the stubbing that was already present in `rt::io::file` and the tests should back that up. There may be things missing. * All of the work to test `seek`/`tell` is done in `rt::io::file`, even though the actual impl is down in `rt::uv::uvio`. * We have the ability to spin up an `~RtioFileStream` from a raw file descriptor. This would be useful for interacting with stdin and stdout via newrt. * The lowest level abstractions (in `rt::uv::file`) support fully synchronous/blocking interactions with the uv API and there is a CRUD test using it. This may also be useful for blocking printf, if desired (the default would be non-blocking and uses libuv's io threadpool) There are a few polish things I need to do still (the foremost that I know of is undefined behavior when seek'ing beyond the file's boundary). After this lands, I want to move on to mapping more of the `uv_fs_*` API (especially `uv_fs_stat`). Also a few people have mentioned interest in `uv_pipe_t` support. I'm open to suggestions.
flip1995
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Apr 7, 2022
Allow raw lint descriptions update_lints now understands raw strings in declare_clippy_lint descriptions. Supersedes rust-lang#8655 cc `@Alexendoo` thanks for addressing this so quickly. I build a little bit simpler version of your patch. I don't think it really matters what `Literal` we're trying to tokenize, since we assume later, that it is some sort of `str`. changelog: none
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This PR includes the addition of the essential CRUD functionality exposed as a part of the
uv_fs_*api. There's a lot more to be done, but the essential abstractions are in place and can be easily expanded.A summary:
rt::io::file::FileStreamis fleshed out and behaves as a non-positional file stream (that is, it has a cursor that can be viewed/changed viatellandseekRtioFileStreamexposes pairs ofread(), write()andpread(), pwrite(). The latter two take explicitoffsetparams and don't respect the current cursor location in a file afaik. They both use the same underlying libuv implseek/telloperations, these are impl'd inUvFileStreamby usinglseek(2)on the raw file descriptor.rt::io::fileand the tests should back that up. There may be things missing.seek/tellis done inrt::io::file, even though the actual impl is down inrt::uv::uvio.~RtioFileStreamfrom a raw file descriptor. This would be useful for interacting with stdin and stdout via newrt.rt::uv::file) support fully synchronous/blocking interactions with the uv API and there is a CRUD test using it. This may also be useful for blocking printf, if desired (the default would be non-blocking and uses libuv's io threadpool)There are a few polish things I need to do still (the foremost that I know of is undefined behavior when seek'ing beyond the file's boundary).
After this lands, I want to move on to mapping more of the
uv_fs_*API (especiallyuv_fs_stat). Also a few people have mentioned interest inuv_pipe_tsupport. I'm open to suggestions.