prometheus/db_unix.go

28 lines
563 B
Go

// +build !windows,!plan9,!solaris
package tsdb
import (
"os"
"unsafe"
"golang.org/x/sys/unix"
)
func mmap(f *os.File, length int) ([]byte, error) {
return unix.Mmap(int(f.Fd()), 0, length, unix.PROT_READ, unix.MAP_SHARED)
}
func munmap(b []byte) (err error) {
return unix.Munmap(b)
}
// unix.Madvise is not defined for darwin, so we define it ourselves.
func madvise(b []byte, advice int) (err error) {
_, _, e1 := unix.Syscall(unix.SYS_MADVISE, uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), uintptr(advice))
if e1 != 0 {
err = e1
}
return
}