#ifndef JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H

#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H

/* This file really combines "structs" and "types", but only transitionally. */

#if defined(JEMALLOC_BACKGROUND_THREAD) || defined(JEMALLOC_LAZY_LOCK)

#  define JEMALLOC_PTHREAD_CREATE_WRAPPER

#endif

#define BACKGROUND_THREAD_INDEFINITE_SLEEP UINT64_MAX

#define MAX_BACKGROUND_THREAD_LIMIT MALLOCX_ARENA_LIMIT

#define DEFAULT_NUM_BACKGROUND_THREAD 4

typedef enum {

	background_thread_stopped,

	background_thread_started,

	/* Thread waits on the global lock when paused (for arena_reset). */

	background_thread_paused,

} background_thread_state_t;

struct background_thread_info_s {

#ifdef JEMALLOC_BACKGROUND_THREAD

	/* Background thread is pthread specific. */

	pthread_t		thread;

	pthread_cond_t		cond;

#endif

	malloc_mutex_t		mtx;

	background_thread_state_t	state;

	/* When true, it means no wakeup scheduled. */

	atomic_b_t		indefinite_sleep;

	/* Next scheduled wakeup time (absolute time in ns). */

	nstime_t		next_wakeup;

	/*

	 *  Since the last background thread run, newly added number of pages

	 *  that need to be purged by the next wakeup.  This is adjusted on

	 *  epoch advance, and is used to determine whether we should signal the

	 *  background thread to wake up earlier.

	 */

	size_t			npages_to_purge_new;

	/* Stats: total number of runs since started. */

	uint64_t		tot_n_runs;

	/* Stats: total sleep time since started. */

	nstime_t		tot_sleep_time;

};

typedef struct background_thread_info_s background_thread_info_t;

struct background_thread_stats_s {

	size_t num_threads;

	uint64_t num_runs;

	nstime_t run_interval;

};

typedef struct background_thread_stats_s background_thread_stats_t;

#endif /* JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H */