/// <reference types="node" />
import { PROT, MAP, IPC, FLAG, SHM, Ishmid_ds } from './platform';
import { number64, TAddress } from './types';
export declare function mmap(addr: number, length: number, prot: PROT, flags: MAP, fd: number, offset: number): number64;
export declare function munmap(addr: Buffer, length: number): number;
export declare function mprotect(addr: TAddress, len: number, prot: PROT): number;
/**
 * @param key {number}
 * @param size {number}
 * @param shmflg {IPC|FLAG} If shmflg specifies both IPC_CREAT and IPC_EXCL and a shared memory segment already exists
 *      for key, then shmget() fails with errno set to EEXIST. (This is analogous to the effect of the combination
 *      O_CREAT | O_EXCL for open(2).)
 * @returns {number} `shmid` -- ID of the allocated memory, if positive.
 */
export declare function shmget(key: number, size: number, shmflg: IPC | FLAG): number;
/**
 * @param shmid {number} ID returned by `shmget`.
 * @param shmaddr {number} Optional approximate address where to allocate memory, or NULL.
 * @param shmflg {SHM}
 * @returns {number}
 */
export declare function shmat(shmid: number, shmaddr?: number, shmflg?: SHM): number64;
/**
 * @param shmaddr {number}
 * @returns {number} On success shmdt() returns 0; on error -1 is returned, and errno is set to indicate the cause of the error.
 */
export declare function shmdt(shmaddr: number): number;
/**
 * Performs the control operation specified by cmd on the shared memory segment whose identifier is given in shmid.
 *
 * In `libc`:
 *
 *      int shmctl(int shmid, int cmd, struct shmid_ds *buf);
 *
 * Reference:
 *
 *  - http://linux.die.net/man/2/shmctl
 *
 * @param shmid {number}
 * @param cmd {defs.IPC|defs.SHM}
 * @param buf {Buffer|defs.shmid_ds|defs.NULL} Buffer of size `defs.shmid_ds.size` where kernel will write reponse, or
 *      `defs.shmid_ds` structure that will be serialized for kernel to read data from, or 0 if no argument needed.
 * @returns {number} A successful IPC_INFO or SHM_INFO operation returns the index of the highest used entry in the
 *      kernel's internal array recording information about all shared memory segments. (This information can be used
 *      with repeated SHM_STAT operations to obtain information about all shared memory segments on the system.) A
 *      successful SHM_STAT operation returns the identifier of the shared memory segment whose index was given in
 *      shmid. Other operations return 0 on success. On error, -1 is returned, and errno is set appropriately.
 */
export declare function shmctl(shmid: number, cmd: IPC | SHM, buf?: Buffer | Ishmid_ds | number): number;