svipc

package module

v0.1.0 Latest Latest Go to latest Published: May 14, 2020 License: MIT Imports: 2 Imported by: 13

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Repository

github.com/nvi-inc/svipc

Links

Open Source Insights

README ¶

Pure Go SysV IPC

This library implements SysV IPC commands on Linux using system calls rather than cgo.

Shared memory access is implemented and fairly well tested. Semaphores are partially implemented. Messages queues are not yet implemented.

API not yet fixed.

Documentation ¶

Rendered for

Index ¶

Constants
func Semctl(id uintptr, num int, cmd int) (ret int, err error)
func Semget(key IpcKey, nsems int, flags int) (id uintptr, err error)
func Semop(id uintptr, buf unsafe.Pointer, n int) (err error)
func Shmat(id uintptr, tagaddr uintptr, flags int) (addr unsafe.Pointer, err error)
func Shmctl(id uintptr, cmd uintptr, shmid *ShmId) (err error)
func Shmdt(addr unsafe.Pointer) (err error)
func Shmget(key IpcKey, size uintptr, flags int) (id uintptr, err error)
type IpcKey
- func Ftok(path string, id uint64) (IpcKey, error)
type IpcPerm
type SemId
type ShmId
type ShmInfo

Constants ¶

View Source

const (
	SHM_R = 0400
	SHM_W = 0200

	SHM_RDONLY = 010000
	SHM_RND    = 020000
	SHM_REMAP  = 040000
	SHM_EXEC   = 0100000

	SHM_LOCK      = 11
	SHM_UNLOCK    = 12
	SHM_STAT      = 13
	SHM_INFO      = 14
	SHM_DEST      = 01000
	SHM_LOCKED    = 02000
	SHM_HUGETLB   = 04000
	SHM_NORESERVE = 010000

	IPC_CREAT  = 01000
	IPC_EXCL   = 02000
	IPC_NOWAIT = 04000

	IPC_RMID = 0
	IPC_SET  = 1
	IPC_STAT = 2
	IPC_INFO = 3

	SEM_UNDO = 0x1000
	GETPID   = 11
	GETVAL   = 12
	GETALL   = 13
	GETNCNT  = 14
	GETZCNT  = 15
	SETVAL   = 16
	SETALL   = 17

	SEM_STAT = 18
	SEM_INFO = 19
)

Variables ¶

This section is empty.

Functions ¶

func Semctl ¶

func Semctl(id uintptr, num int, cmd int) (ret int, err error)

func Semget ¶

func Semget(key IpcKey, nsems int, flags int) (id uintptr, err error)

func Semop ¶

func Semop(id uintptr, buf unsafe.Pointer, n int) (err error)

func Shmat ¶

func Shmat(id uintptr, tagaddr uintptr, flags int) (addr unsafe.Pointer, err error)

func Shmctl ¶

func Shmctl(id uintptr, cmd uintptr, shmid *ShmId) (err error)

func Shmdt ¶

func Shmdt(addr unsafe.Pointer) (err error)

func Shmget ¶

func Shmget(key IpcKey, size uintptr, flags int) (id uintptr, err error)

Types ¶

type IpcKey ¶

type IpcKey int32

func Ftok ¶

func Ftok(path string, id uint64) (IpcKey, error)

type IpcPerm ¶

type IpcPerm struct {
	Key  IpcKey
	Uid  uint32
	Gid  uint32
	Cuid uint32
	Cgid uint32
	Mode uint16

	Seq uint16
	// contains filtered or unexported fields
}

type SemId ¶

type SemId struct {
	Perm  IpcPerm
	Otime int64

	Ctime int64

	Nsems uint64
	// contains filtered or unexported fields
}

type ShmId ¶

type ShmId struct {
	Perm   IpcPerm
	Segsz  uint64
	Atime  int64
	Dtime  int64
	Ctime  int64
	Cpid   int32
	Lpid   int32
	Nattch uint64
	// contains filtered or unexported fields
}

type ShmInfo ¶

type ShmInfo struct {
	Shmmax uint64
	Shmmin uint64
	Shmmni uint64
	Shmseg uint64
	Shmall uint64
	// contains filtered or unexported fields
}

Source Files ¶

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