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/*
 * Copyright (c) 2007 Apple, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* pthread workqueue defns */

#ifndef _POSIX_PTHREAD_WORKQUEUE_H
#define _POSIX_PTHREAD_WORKQUEUE_H

#include <sys/cdefs.h>
#include <pthread.h>
#include <Availability.h>

#define __PTHREAD_WORKQ_SIZE__ 128
#define __PTHREAD_WORKQ_ATTR_SIZE__ 60

#define PTHREAD_WORKQUEUE_SIG 0xBEBEBEBE
#define PTHREAD_WORKQUEUE_ATTR_SIG 0xBEBEBEBE

#ifndef __POSIX_LIB__
typedef struct { unsigned int  sig; char opaque[__PTHREAD_WORKQ_SIZE__];} *pthread_workqueue_t;
typedef struct { unsigned int  sig; char opaque[__PTHREAD_WORKQ_ATTR_SIZE__]; } pthread_workqueue_attr_t;
#endif
typedef void * pthread_workitem_handle_t;
/* Kernel expected target concurrency of the workqueue clients for the three priority queues */

#define WORKQ_HIGH_PRIOQUEUE	0	/* high priority queue */
#define WORKQ_DEFAULT_PRIOQUEUE	1	/* default priority queue */
#define WORKQ_LOW_PRIOQUEUE	2	/* low priority queue */
#define WORKQ_BG_PRIOQUEUE	3	/* background priority queue */

#define WORKQ_NUM_PRIOQUEUE	4

extern __int32_t workq_targetconc[WORKQ_NUM_PRIOQUEUE];

__BEGIN_DECLS
int pthread_workqueue_init_np(void) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
int pthread_workqueue_attr_init_np(pthread_workqueue_attr_t * attr) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
int pthread_workqueue_attr_destroy_np(pthread_workqueue_attr_t * attr) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
int pthread_workqueue_attr_getqueuepriority_np(const pthread_workqueue_attr_t * attr, int * qprio) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
/* WORKQ_HIGH/DEFAULT/LOW_PRIOQUEUE are the only valid values */
int pthread_workqueue_attr_setqueuepriority_np(pthread_workqueue_attr_t * attr, int qprio) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
int pthread_workqueue_attr_getovercommit_np(const pthread_workqueue_attr_t * attr, int * ocommp) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
int pthread_workqueue_attr_setovercommit_np(pthread_workqueue_attr_t * attr, int ocomm) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);


int pthread_workqueue_create_np(pthread_workqueue_t * workqp, const pthread_workqueue_attr_t * attr) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
int pthread_workqueue_additem_np(pthread_workqueue_t workq, void ( *workitem_func)(void *), void * workitem_arg, pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
/* If the queue value is WORKQ_NUM_PRIOQUEUE, the request for concurrency is for all queues */
int pthread_workqueue_requestconcurrency_np(int queue, int concurrency) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
int pthread_workqueue_getovercommit_np(pthread_workqueue_t workq,  unsigned int *ocommp) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
/* 
 * If the arg is non zero, it enables kill on current thread.
 * If the arg of zero, it disables kill on current thread.
 */
int __pthread_workqueue_setkill(int) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);

/* ===================================================================================================
 * NEW SPIs for 10.8 onwards
 *
 * ===================================================================================================
 */

typedef void (*pthread_workqueue_function_t)(int queue_priority, int options, void *ctxt);
int pthread_workqueue_setdispatch_np(pthread_workqueue_function_t worker_func) __OSX_AVAILABLE_STARTING(__MAC_10_8, __IPHONE_6_0);

#define WORKQ_ADDTHREADS_OPTION_OVERCOMMIT 0x00000001
int pthread_workqueue_addthreads_np(int queue_priority, int options, int numthreads) __OSX_AVAILABLE_STARTING(__MAC_10_8, __IPHONE_6_0);
__END_DECLS

#endif /* _POSIX_PTHREAD_WORKQUEUE_H */