std::os::fd

Status: experimental

Waiting for a file descriptor (a handle on Windows) to be readable or writable without holding a scheduler worker.

Items

Item	Signature	Description
Descriptor	trait Descriptor	What a call that needs an OS descriptor takes: an fs::File, which stays open while the call uses it, or term::STDIN, term::STDOUT, or term::STDERR for a standard stream. Any other integer is refused, since a descriptor read off a file names whatever the OS reuses it for once the file closes (GT0119).
wait_readable	fn wait_readable<D: os::fd::Descriptor>(fd: D, timeout_ms: i64) -> Result<bool, errors::Error>	wait_readable(fd, timeout_ms) -> Result<bool, errors::Error>: true when fd has input (or reached end of input) within timeout_ms milliseconds; a negative timeout waits indefinitely. False at the timeout or when the goroutine's cohort is cancelled. The goroutine parks; other goroutines keep running.
wait_writable	fn wait_writable<D: os::fd::Descriptor>(fd: D, timeout_ms: i64) -> Result<bool, errors::Error>	wait_writable(fd, timeout_ms) -> Result<bool, errors::Error>: true when fd accepts a write within the timeout. Windows handles always do.