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package sysx
import (
"syscall"
"unsafe"
)
var _zero uintptr
// use is a no-op, but the compiler cannot see that it is.
// Calling use(p) ensures that p is kept live until that point.
//go:noescape
func use(p unsafe.Pointer)
// Do the interface allocations only once for common
// Errno values.
var (
errEAGAIN error = syscall.EAGAIN
errEINVAL error = syscall.EINVAL
errENOENT error = syscall.ENOENT
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
switch e {
case 0:
return nil
case syscall.EAGAIN:
return errEAGAIN
case syscall.EINVAL:
return errEINVAL
case syscall.ENOENT:
return errENOENT
}
return e
}
|
