mirror of https://github.com/etcd-io/bbolt.git
34 lines
734 B
Go
34 lines
734 B
Go
package bolt
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
var odirect int
|
|
|
|
// fdatasync flushes written data to a file descriptor.
|
|
func fdatasync(f *os.File) error {
|
|
return f.Sync()
|
|
}
|
|
|
|
// 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)
|
|
}
|