/**
 * @packageDocumentation
 * @module std
 */
import { ISharedLockable } from "../base/thread/ISharedLockable";
import { ISharedTimedLockable } from "../base/thread/ISharedTimedLockable";
/**
 *
 */
export declare class SharedLock {
}
/**
 * Shared mutex wrapper for the safe read lock.
 *
 * The module {@link SharedLock} is a collection of general purpose functions wrapping shared
 * mutex for ensuring the safe lock. If you *lock* a mutex (with your business logic code) through
 * any function of the {@link SharedLock} module, the shared mutex would be automatically
 * *unlocked* after your business, even if an error has been occured in your business.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
export declare namespace SharedLock {
    /**
     * Read locks a shared mutex with your business.
     *
     * Shares a mutex until be the *closure* has been completed. If there're someone who have
     * already {@link ILockable.lock monopolied} the mutex, the function call would be blocked
     * until all of them to {@link unlock return} their acquisitions.
     *
     * When succeeded to {@link ISharedLockable.lock_shared share} the mutex, the {@link lock}
     * function will call the *closure*, a custom function defning your business. After the
     * *closure* function be returned, the {@link lock} function automatically
     * {@link ISharedLockable.unlock_shared unlocks} the mutex, even if the *closure* function
     * throws any error.
     *
     * Therefore, when using this {@link lock} function, you don't need to consider about
     * {@link ISharedLockable.unlock_shared returning} the lock acquistion after your business.
     * It would just be done automatically.
     *
     * @param mutex Target shared mutex to read lock.
     * @param closure A function defining your business.
     *
     * @throw Exception would be thrown if the *closure* function throws any error.
     */
    export function lock<Mutex extends Pick<ISharedLockable, "lock_shared" | "unlock_shared">>(mutex: Mutex, closure: Closure): Promise<void>;
    /**
     * Tries to read lock a shared mutex with your business.
     *
     * Attemps to share a mutex without blocking. If succeeded to share the mutex immediately, it
     * returns `true` directly. Otherwise there's someone who has already
     * {@link ILockable.lock monopolied} the mutex, the function gives up the trial immediately
     * and returns `false` directly without calling the *closure*.
     *
     * When succeeded to {@link ISharedLockable.lock_shared share} the mutex, the {@link try_lock}
     * function will call the *closure*, a custom function defning your business. After the
     * *closure* function be returned, the {@link try_lock} function automatically
     * {@link ISharedLockable.unlock_shared unlocks} the mutex, even if the *closure* function
     * throws any error.
     *
     * Therefore, when using this {@link try_lock} function, you don't need to consider about
     * {@link ISharedLockable.unlock_shared returning} the lock acquistion after your business.
     * It would just be done automatically.
     *
     * @param mutex Target shared mutex to try read lock.
     * @param closure A function defining your business.
     * @return Whether succeeded to share the mutex or not.
     *
     * @throw Exception would be thrown if the *closure* function throws any error.
     */
    export function try_lock<Mutex extends Pick<ISharedLockable, "try_lock_shared" | "unlock_shared">>(mutex: Mutex, closure: Closure): Promise<boolean>;
    /**
     * Tries to read lock a shared mutex with your business until timeout.
     *
     * Attemps to share a mutex until timeout. If succeeded to share the mutex until timeout, it
     * returns `true` after calling the *closure*. Otherwise failed to acquiring the shared lock
     * in the given time, the function gives up the trial and returns `false` without calling the
     * *closure*.
     *
     * Failed to acquring the shared lock in the given time (returns `false`), it means that
     * there's someone who has already {@link ILockable.lock monopolied} the mutex and does not
     * return it over the timeout.
     *
     * When succeeded to {@link ISharedLockable.lock_shared share} the mutex, the
     * {@link try_lock_for} function will call the *closure*, a custom function defning your
     * business. After the *closure* function be returned, the {@link try_lock} function
     * automatically {@link ISharedLockable.unlock_shared unlocks} the mutex, even if the
     * *closure* function throws any error.
     *
     * Therefore, when using this {@link try_lock_for} function, you don't need to consider about
     * {@link ISharedLockable.unlock_shared returning} the lock acquistion after your business.
     * It would just be done automatically.
     *
     * @param mutex Target mutex to try lock until timeout.
     * @param ms The maximum miliseconds for waiting.
     * @param closure A function defining your business.
     * @return Whether succeeded to share the mutex or not.
     *
     * @throw Exception would be thrown if the *closure* function throws any error.
     */
    export function try_lock_for<Mutex extends Pick<ISharedTimedLockable, "try_lock_shared_for" | "unlock_shared">>(mutex: Mutex, ms: number, closure: Closure): Promise<boolean>;
    /**
     * Tries to read lock a shared mutex with your business until time expiration.
     *
     * Attemps to share a mutex until time expiration. If succeeded to share the mutex until the
     * time expiration, it returns `true` after calling the *closure*. Otherwise failed to
     * acquiring the shared lock in the given time, the function gives up the trial and returns
     * `false` without calling the *closure*.
     *
     * Failed to acquring the shared lock in the given time (returns `false`), it means that
     * there's someone who has already {@link ILockable.lock monopolied} the mutex and does not
     * return it over the time expiration.
     *
     * When succeeded to {@link ISharedLockable.lock_shared share} the mutex, the
     * {@link try_lock_until} function will call the *closure*, a custom function defning your
     * business. After the *closure* function be returned, the {@link try_lock} function
     * automatically {@link ISharedLockable.unlock_shared unlocks} the mutex, even if the
     * *closure* function throws any error.
     *
     * Therefore, when using this {@link try_lock_until} function, you don't need to consider
     * about {@link ISharedLockable.unlock_shared returning} the lock acquistion after your
     * business. It would just be done automatically.
     *
     * @param mutex Target mutex to try lock until time expiration.
     * @param at The maximum time point to wait.
     * @param closure A function defining your business.
     * @return Whether succeeded to share the mutex or not.
     *
     * @throw Exception would be thrown if the *closure* function throws any error.
     */
    export function try_lock_until<Mutex extends Pick<ISharedTimedLockable, "try_lock_shared_until" | "unlock_shared">>(mutex: Mutex, at: Date, closure: Closure): Promise<boolean>;
    /**
     * Type of closure function defining your business logic.
     */
    type Closure = () => void | Promise<void>;
    export {};
}
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