Files
wazero/internal/platform/select_linux.go
Edoardo Vacchi ea336061c2
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wasi: introduce platform.Select and use it for poll_oneoff (#1346)
The PR introduces the `platform.Select()` API, wrapping `select(2)` on POSIX and emulated in some cases on Windows. RATIONALE.md contains a full explanation of the approach followed in `poll_oneoff` to handle Stdin and the other types of file descriptors, and the clock subscriptions.

It also introduces an abstraction (`StdioFilePoller`) to allow the simulation of different scenarios (waiting for input, input ready, timeout expired, etc.) when unit-testing interactive input.

This closes #1317.

Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
2023-04-18 16:31:34 +02:00

17 lines
427 B
Go

package platform
import (
"syscall"
"time"
)
// syscall_select invokes select on Unix (unless Darwin), with the given timeout Duration.
func syscall_select(n int, r, w, e *FdSet, timeout *time.Duration) (int, error) {
var t *syscall.Timeval
if timeout != nil {
tv := syscall.NsecToTimeval(timeout.Nanoseconds())
t = &tv
}
return syscall.Select(n, (*syscall.FdSet)(r), (*syscall.FdSet)(w), (*syscall.FdSet)(e), t)
}