#ifndef THREADPOOL_H
#define THREADPOOL_H

#pragma once

#include "config.h"
#include "memutil.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct threadpool_t threadpool_t;
typedef struct strand_t strand_t;

typedef void (*threadpool_workitem_proc)(threadpool_t *threadpool, void *arg);
typedef void (*threadpool_workitem_proc2)(threadpool_t *threadpool, void *arg, param_size_t param1, param_size_t param2);
typedef void (*threadpool_decorator_callback)(threadpool_t *threadpool, void *user_data);

TOOLKIT_API int threadpool_create(threadpool_t **p_threadpool);
TOOLKIT_API int threadpool_destroy(threadpool_t *threadpool);
TOOLKIT_API int threadpool_set_thread_decorator(threadpool_t *threadpool, 
									threadpool_decorator_callback dc_init, 
									threadpool_decorator_callback dc_term, 
									void *user_data);
TOOLKIT_API int threadpool_start(threadpool_t *threadpool, 
					 int num_fix_thread, 
					 int max_tmp_thread, 
					 int tmp_thread_ttl,
					 int stack_size); // zero for default
TOOLKIT_API int threadpool_stop(threadpool_t *threadpool);
TOOLKIT_API int threadpool_queue_workitem(threadpool_t *threadpool, 
							  strand_t *strand, 
							  threadpool_workitem_proc workitem, 
							  void *arg);
TOOLKIT_API int threadpool_queue_workitem2(threadpool_t *threadpool, 
							  strand_t *strand, 
							  threadpool_workitem_proc2 workitem, 
							  void *arg, 
							  param_size_t param1,
							  param_size_t param2);

#define threadpool_post_workitem_fifo threadpool_queue_workitem
#define threadpool_post_workitem_fifo2 threadpool_queue_workitem2

TOOLKIT_API int threadpool_post_workitem_lifo(threadpool_t *threadpool, 
								  strand_t *strand, 
								  threadpool_workitem_proc workitem, 
								  void *arg);
TOOLKIT_API int threadpool_post_workitem_lifo2(threadpool_t *threadpool, 
								   strand_t *strand, 
								   threadpool_workitem_proc2 workitem, 
								   void *arg, 
								   param_size_t param1,
								   param_size_t param2);

TOOLKIT_API void threadpool_set_user_data(threadpool_t *threadpool, void *user_data);
TOOLKIT_API void *threadpool_get_user_data(threadpool_t *threadpool);

typedef void (*log_func)(threadpool_t *threadpool, const char*);
TOOLKIT_API void threadpool_set_log(threadpool_t *threadpool, log_func func);

TOOLKIT_API strand_t *strand_create();
TOOLKIT_API int strand_dec_ref(strand_t *strand);
TOOLKIT_API int strand_inc_ref(strand_t *strand);
TOOLKIT_API int strand_ref_cnt(strand_t *strand);
TOOLKIT_API void strand_lock(strand_t *strand);
TOOLKIT_API void strand_unlock(strand_t *strand);
static void strand_destroy(strand_t *strand) { strand_dec_ref(strand); }

#ifdef __cplusplus
} // extern "C" {
#endif

#endif // THREADPOOL_H