//================================================================
/**
 * @packageDocumentation
 * @module std
 */
//================================================================
import { ISharedLockable } from "../base/thread/ISharedLockable";
import { SharedTimedMutex } from "./SharedTimedMutex";

/**
 * Shared mutex.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
export class SharedMutex implements ISharedLockable {
    private mutex_: SharedTimedMutex;

    /* ---------------------------------------------------------
        CONSTRUCTOR
    --------------------------------------------------------- */
    /**
     * Default Constructor.
     */
    public constructor() {
        this.mutex_ = new SharedTimedMutex(this);
    }

    /* ---------------------------------------------------------
        WRITE LOCK
    --------------------------------------------------------- */
    /**
     * @inheritDoc
     */
    public lock(): Promise<void> {
        return this.mutex_.lock();
    }

    /**
     * @inheritDoc
     */
    public try_lock(): Promise<boolean> {
        return this.mutex_.try_lock();
    }

    /**
     * @inheritDoc
     */
    public unlock(): Promise<void> {
        return this.mutex_.unlock();
    }

    /* ---------------------------------------------------------
        READ LOCK
    --------------------------------------------------------- */
    /**
     * @inheritDoc
     */
    public lock_shared(): Promise<void> {
        return this.mutex_.lock_shared();
    }

    /**
     * @inheritDoc
     */
    public try_lock_shared(): Promise<boolean> {
        return this.mutex_.try_lock_shared();
    }

    /**
     * @inheritDoc
     */
    public unlock_shared(): Promise<void> {
        return this.mutex_.unlock_shared();
    }
}