#ifndef __SITECING_PROCESS_MANAGER_H
#define __SITECING_PROCESS_MANAGER_H

#include <sitecing/scoreboard.h>

/**
 * @file
 * @brief the process manager.
 */

namespace sitecing {

    /**
     * The process manager.
     */
    class process_manager {
	public:
	    /**
	     * Minimum number of child processes.
	     */
	    int min_children;
	    /**
	     * Maxinum number of child processes.
	     */
	    int max_children;
	    /**
	     * Minimum number of spare child processes.
	     */
	    int min_spare_children;
	    /**
	     * Maxiumum number of spare child processes.
	     */
	    int max_spare_children;
	    /**
	     * The scoreboard.
	     */
	    scoreboard sboard;
	    /**
	     * We're in the process of shutting down.
	     */
	    bool finishing;
	    /**
	     * @todo TODO: wish I could rememer -- document me.
	     */
	    bool die_humbly;

	    process_manager();
	    virtual ~process_manager();

	    /**
	     * The main loop.
	     */
	    void manage();

	    /**
	     * The worker function.
	     * @param slot the slot allocated for the process.
	     */
	    virtual void process(int slot) = 0;

	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    void manage_children();
	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    bool spawn_children();
	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    bool kill_children();
	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    void spawn_child();
	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    void wait_for_children(bool hang=false);
	    /**
	     * @todo TODO: wish I could remember -- document me.
	     */
	    void collect_dead_souls(bool actively=false);
    };

}

#endif /* __SITECING_PROCESS_MANAGER_H */