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