installed plugin WPScan version 1.15.1

wp-content/plugins/wpscan/libraries/action-scheduler/classes/ActionScheduler_OptionLock.php

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+<?php
+
+/**
+ * Provide a way to set simple transient locks to block behaviour
+ * for up-to a given duration.
+ *
+ * Class ActionScheduler_OptionLock
+ * @since 3.0.0
+ */
+class ActionScheduler_OptionLock extends ActionScheduler_Lock {
+
+	/**
+	 * Set a lock using options for a given amount of time (60 seconds by default).
+	 *
+	 * Using an autoloaded option avoids running database queries or other resource intensive tasks
+	 * on frequently triggered hooks, like 'init' or 'shutdown'.
+	 *
+	 * For example, ActionScheduler_QueueRunner->maybe_dispatch_async_request() uses a lock to avoid
+	 * calling ActionScheduler_QueueRunner->has_maximum_concurrent_batches() every time the 'shutdown',
+	 * hook is triggered, because that method calls ActionScheduler_QueueRunner->store->get_claim_count()
+	 * to find the current number of claims in the database.
+	 *
+	 * @param string $lock_type A string to identify different lock types.
+	 * @bool True if lock value has changed, false if not or if set failed.
+	 */
+	public function set( $lock_type ) {
+		return update_option( $this->get_key( $lock_type ), time() + $this->get_duration( $lock_type ) );
+	}
+
+	/**
+	 * If a lock is set, return the timestamp it was set to expiry.
+	 *
+	 * @param string $lock_type A string to identify different lock types.
+	 * @return bool|int False if no lock is set, otherwise the timestamp for when the lock is set to expire.
+	 */
+	public function get_expiration( $lock_type ) {
+		return get_option( $this->get_key( $lock_type ) );
+	}
+
+	/**
+	 * Get the key to use for storing the lock in the transient
+	 *
+	 * @param string $lock_type A string to identify different lock types.
+	 * @return string
+	 */
+	protected function get_key( $lock_type ) {
+		return sprintf( 'action_scheduler_lock_%s', $lock_type );
+	}
+}