The logic used to allow providing a path for setting the CWD of a child process in https://codeberg.org/ziglang/zig/pulls/31090 applies here as well:
- Windows must provide a path when setting the CWD, so the path of an `Io.Dir` must be resolved before actually calling RtlSetCurrentDirectory_U
- A directory handle may have multiple paths associated with it, so providing the CWD as a string retains a legitimate use case in cases where the precise path matters
While the general guidance remains useful, it is not the case that
error.Canceled will always pass across the Group task function boundary.
Remove the too-aggressive assertions and add unit test coverage.
Closes#30096Closes#31340Closes#31358
Remove the `{D}` format specifier. It is moved into `std.Io.Duration` as
a format method.
Migration plan:
```diff
-writer.print("{D}", .{ns});
+writer.print("{f}", .{std.Io.Duration{ .nanoseconds = ns }});
```
All instances where `{D}` was used have been changed to use
`std.Io.Duration` and `{f}`.
Fixes#31281
and make the return value of `cancel` return queue items.
I don't think it's possible to make `cancel` not deadlock with an empty
queue buffer without introducing a new Group primitive.
This is the best I could come up with based on existing primitives.
Let's see if applications find these APIs palatable.
This function works with a slice of futures and returns the index of a
completed one. This doesn't work very well in practice because it's
either too high level or too low level.
At the lower level we have Io.Batch for doing this kind of thing at the
Operation API layer.
At the higher level we have Io.Select which is a convenience wrapper
around an Io.Group and an Io.Queue.
After fetching a package and applying the filter by deleting files that
are not part of the hash, creates a recompressed $GLOBAL_CACHE/p/$PKG_HASH.tar.gz
Checking this cache before fetching network URLs is not yet implemented.
Replaced by the lockStderr functions of std.Io. Trying to make
`std.process.stderr_thread_mutex` be a bridge across different Io
implementations didn't work in practice.
Importantly, adds ability to get Clock resolution, which may be zero.
This allows error.Unexpected and error.ClockUnsupported to be removed
from timeout and clock reading error sets.
and make reading file streaming allowed to return 0 byte reads.
According to Microsoft documentation, on Windows it is possible to get
0-byte reads from pipes when 0-byte writes are made.
This commit shows a proof-of-concept direction for std.Io.VTable to go,
which is to have general support for batching, timeouts, and
non-blocking.
I'm not sure if this is a good idea or not so I'm putting it up for
scrutiny.
This commit introduces `std.Io.operate`, `std.Io.Operation`, and
implements it experimentally for `FileReadStreaming`.
In `std.Io.Threaded`, the implementation is based on poll().
This commit shows how it can be used in `std.process.run` to collect
both stdout and stderr in a single-threaded program using
`std.Threaded.Io`.
It also demonstrates how to upgrade code that was previously using
`std.Io.poll` (*not* integrated with the interface!) using concurrency.
This may not be ideal since it makes the build runner no longer support
single-threaded mode. There is still a needed abstraction for
conveniently reading multiple File streams concurrently without
io.concurrent, but this commit demonstrates that such an API can be
built on top of the new `std.Io.operate` functionality.
In Zig standard library, Dir means an open directory handle. path
represents a file system identifier string. This function is better
named after "current path" than "current dir". "get" and "working" are
superfluous.
- remove file_size parameter from MemoryMap.write
- remove requirement for mapping length to be aligned
- align allocated fallback memory
- add unit test for std.Io.Threaded.disable_memory_mapping = true
- add unit test for MemoryMap.setLength
- change offset to u64
- make len non-optional
- make write take a file_size parameter
- std.Io.Threaded: introduce disable_memory_mapping flag to force it to
take the fallback path.
Additionally:
- introduce BlockSize to File.Stat. On Windows, based on cached call to
NtQuerySystemInformation. On unsupported OS's, set to 1.
- support File.NLink on Windows. this was available the whole time, we
just didn't see the field at first.
- remove EBADF / INVALID_HANDLE from reading/writing file error sets
Andrew Kelley