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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build unix || (js && wasm) || wasip1
package time
import (
"errors"
"runtime"
"syscall"
)
// for testing: whatever interrupts a sleep
func interrupt() {
// There is no mechanism in wasi to interrupt the call to poll_oneoff
// used to implement runtime.usleep so this function does nothing, which
// somewhat defeats the purpose of TestSleep but we are still better off
// validating that time elapses when the process calls time.Sleep than
// skipping the test altogether.
if runtime.GOOS != "wasip1" {
syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
}
}
func open(name string) (uintptr, error) {
fd, err := syscall.Open(name, syscall.O_RDONLY, 0)
if err != nil {
return 0, err
}
return uintptr(fd), nil
}
func read(fd uintptr, buf []byte) (int, error) {
return syscall.Read(int(fd), buf)
}
func closefd(fd uintptr) {
syscall.Close(int(fd))
}
func preadn(fd uintptr, buf []byte, off int) error {
whence := seekStart
if off < 0 {
whence = seekEnd
}
if _, err := syscall.Seek(int(fd), int64(off), whence); err != nil {
return err
}
for len(buf) > 0 {
m, err := syscall.Read(int(fd), buf)
if m <= 0 {
if err == nil {
return errors.New("short read")
}
return err
}
buf = buf[m:]
}
return nil
}
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