| canonicalize.rs |
|
1739 |
| copy.rs |
|
746 |
| create_dir.rs |
|
1560 |
| create_dir_all.rs |
|
1770 |
| dir_builder.rs |
|
3755 |
| file |
|
|
| file.rs |
Types for working with [`File`].
[`File`]: File |
25624 |
| hard_link.rs |
|
1322 |
| metadata.rs |
|
1338 |
| mocks.rs |
Mock version of std::fs::File; |
4180 |
| mod.rs |
Asynchronous file and standard stream adaptation.
This module contains utility methods and adapter types for input/output to
files or standard streams (`Stdin`, `Stdout`, `Stderr`), and
filesystem manipulation, for use within (and only within) a Tokio runtime.
Tasks run by *worker* threads should not block, as this could delay
servicing reactor events. Portable filesystem operations are blocking,
however. This module offers adapters which use a `blocking` annotation
to inform the runtime that a blocking operation is required. When
necessary, this allows the runtime to convert the current thread from a
*worker* to a *backup* thread, where blocking is acceptable.
## Usage
Where possible, users should prefer the provided asynchronous-specific
traits such as [`AsyncRead`], or methods returning a `Future` or `Poll`
type. Adaptions also extend to traits like `std::io::Read` where methods
return `std::io::Result`. Be warned that these adapted methods may return
`std::io::ErrorKind::WouldBlock` if a *worker* thread can not be converted
to a *backup* thread immediately.
**Warning**: These adapters may create a large number of temporary tasks,
especially when reading large files. When performing a lot of operations
in one batch, it may be significantly faster to use [`spawn_blocking`]
directly:
```
use tokio::fs::File;
use std::io::{BufReader, BufRead};
async fn count_lines(file: File) -> Result<usize, std::io::Error> {
let file = file.into_std().await;
tokio::task::spawn_blocking(move || {
let line_count = BufReader::new(file).lines().count();
Ok(line_count)
}).await?
}
```
[`spawn_blocking`]: fn@crate::task::spawn_blocking
[`AsyncRead`]: trait@crate::io::AsyncRead |
3758 |
| open_options |
|
|
| open_options.rs |
|
23105 |
| read.rs |
|
1714 |
| read_dir.rs |
|
10991 |
| read_link.rs |
|
409 |
| read_to_string.rs |
|
916 |
| remove_dir.rs |
|
349 |
| remove_dir_all.rs |
|
431 |
| remove_file.rs |
|
544 |
| rename.rs |
|
532 |
| set_permissions.rs |
|
455 |
| symlink.rs |
|
534 |
| symlink_dir.rs |
|
607 |
| symlink_file.rs |
|
607 |
| symlink_metadata.rs |
|
426 |
| try_exists.rs |
|
1077 |
| write.rs |
|
881 |