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package bolt
import (
"os"
"syscall"
)
var odirect = syscall.O_DIRECT
// fdatasync flushes written data to a file descriptor.
func fdatasync(f *os.File) error {
return syscall.Fdatasync(int(f.Fd()))
}
// flock acquires an advisory lock on a file descriptor.
func flock(f *os.File) error {
return syscall.Flock(int(f.Fd()), syscall.LOCK_EX)
}
// funlock releases an advisory lock on a file descriptor.
func funlock(f *os.File) error {
return syscall.Flock(int(f.Fd()), syscall.LOCK_UN)
}
// mmap memory maps a file to a byte slice.
func mmap(f *os.File, sz int) ([]byte, error) {
return syscall.Mmap(int(f.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED)
}
// munmap unmaps a pointer from a file.
func munmap(b []byte) error {
return syscall.Munmap(b)
}
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