Imports #
"internal/syscall/windows"
"io/fs"
"syscall"
"errors"
"io/fs"
"errors"
"io"
"io/fs"
"math/rand"
"sync"
"syscall"
"time"
"errors"
"io/fs"
"io/fs"
"syscall"
filelock
Imports
Constants & Variables
allBytes const #
const allBytes = *ast.UnaryExprinodes var #
var inodes = map[File]inode{...}locks var #
var locks = map[inode]inodeLock{...}mu var #
var mu sync.MutexreadLock const #
const readLock lockType = syscall.F_RDLCKreadLock const #
const readLock lockType = 0readLock const #
const readLock = *ast.BinaryExprreadLock const #
const readLock lockType = syscall.LOCK_SHreserved const #
const reserved = 0writeLock const #
const writeLock lockType = syscall.F_WRLCKwriteLock const #
const writeLock lockType = windows.LOCKFILE_EXCLUSIVE_LOCKwriteLock const #
const writeLockwriteLock const #
const writeLock lockType = syscall.LOCK_EXType Aliases
inode type #
type inode uint64lockType type #
type lockType uint32lockType type #
type lockType int16lockType type #
type lockType int8lockType type #
type lockType int16Interfaces
File interface #
A File provides the minimal set of methods required to lock an open file. File implementations must be usable as map keys. The usual implementation is *os.File.
type File interface {
Name() string
Fd() uintptr
Stat() (fs.FileInfo, error)
}Structs
inodeLock struct #
type inodeLock struct {
owner File
queue []<-chan File
}Functions
IsNotSupported function #
IsNotSupported returns a boolean indicating whether the error is known to report that a function is not supported (possibly for a specific input). It is satisfied by errors.ErrUnsupported as well as some syscall errors.
func IsNotSupported(err error) boolLock function #
Lock places an advisory write lock on the file, blocking until it can be locked. If Lock returns nil, no other process will be able to place a read or write lock on the file until this process exits, closes f, or calls Unlock on it. If f's descriptor is already read- or write-locked, the behavior of Lock is unspecified. Closing the file may or may not release the lock promptly. Callers should ensure that Unlock is always called when Lock succeeds.
func Lock(f File) errorRLock function #
RLock places an advisory read lock on the file, blocking until it can be locked. If RLock returns nil, no other process will be able to place a write lock on the file until this process exits, closes f, or calls Unlock on it. If f is already read- or write-locked, the behavior of RLock is unspecified. Closing the file may or may not release the lock promptly. Callers should ensure that Unlock is always called if RLock succeeds.
func RLock(f File) errorString method #
String returns the name of the function corresponding to lt (Lock, RLock, or Unlock).
func (lt lockType) String() stringUnlock function #
Unlock removes an advisory lock placed on f by this process. The caller must not attempt to unlock a file that is not locked.
func Unlock(f File) errorlock function #
func lock(f File, lt lockType) errorlock function #
func lock(f File, lt lockType) (err error)lock function #
func lock(f File, lt lockType) errorlock function #
func lock(f File, lt lockType) (err error)setlkw function #
setlkw calls FcntlFlock with F_SETLKW for the entire file indicated by fd.
func setlkw(fd uintptr, lt lockType) errorunlock function #
func unlock(f File) errorunlock function #
func unlock(f File) errorunlock function #
func unlock(f File) errorunlock function #
func unlock(f File) errorGenerated with Arrow