Tobias Bucher 09a615c097 Reduce number of syscalls in rand ...

In case that it is statically known that the OS doesn't support
`getrandom` (non-Linux) or becomes clear at runtime that `getrandom`
isn't available (`ENOSYS`), the opened fd ("/dev/urandom") isn't closed
after the function, so that future calls can reuse it. This saves
repeated `open`/`close` system calls at the cost of one permanently open
fd.

Additionally, this skips the initial zero-length `getrandom` call and
directly hands the user buffer to the operating system, saving one
`getrandom` syscall.

2018-08-26 21:22:54 +02:00

..

cloudabi

Auto merge of #53436 - cuviper:trace_fn-stop, r=alexcrichton

2018-08-18 17:15:31 +00:00

redox

std: stop backtracing when the frames are full

2018-08-16 11:28:42 -07:00

unix

Reduce number of syscalls in rand

2018-08-26 21:22:54 +02:00

wasm

Don't format!() string literals

2018-07-28 17:58:52 +02:00

windows

Rollup merge of #53311 - RalfJung:windows-mutex, r=retep998

2018-08-24 16:44:30 +08:00

mod.rs

Add missing \[allow(missing_docs)\]

2018-06-25 20:38:29 +02:00