pthreads/pthread_workqueue.h

   1 /*
   2  * Copyright (c) 2007 Apple, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* pthread workqueue defns */
  24
  25 #ifndef _POSIX_PTHREAD_WORKQUEUE_H
  26 #define _POSIX_PTHREAD_WORKQUEUE_H
  27
  28 #include <sys/cdefs.h>
  29 #include <pthread.h>
  30
  31
  32 #define __PTHREAD_WORKQ_SIZE__ 128
  33 #define __PTHREAD_WORKQ_ATTR_SIZE__ 60
  34
  35 #define PTHREAD_WORKQUEUE_SIG 0xBEBEBEBE
  36 #define PTHREAD_WORKQUEUE_ATTR_SIG 0xBEBEBEBE
  37
  38 #ifndef __POSIX_LIB__
  39 typedef struct { unsigned int  sig; char opaque[__PTHREAD_WORKQ_SIZE__];} *pthread_workqueue_t;
  40 typedef struct { unsigned int  sig; char opaque[__PTHREAD_WORKQ_ATTR_SIZE__]; } pthread_workqueue_attr_t;
  41 #endif
  42 typedef void * pthread_workitem_handle_t;
  43 /* Kernel expected target concurrency of the workqueue clients for the three priority queues */
  44
  45 #define WORKQ_HIGH_PRIOQUEUE    0
  46 #define WORKQ_DEFAULT_PRIOQUEUE 1
  47 #define WORKQ_LOW_PRIOQUEUE     2
  48
  49 #define WORKQ_NUM_PRIOQUEUE     3
  50
  51 extern __int32_t workq_targetconc[WORKQ_NUM_PRIOQUEUE];
  52
  53 __BEGIN_DECLS
  54 int pthread_workqueue_init_np(void);
  55 int pthread_workqueue_attr_init_np(pthread_workqueue_attr_t * attr);
  56 int pthread_workqueue_attr_destroy_np(pthread_workqueue_attr_t * attr);
  57 int pthread_workqueue_attr_getqueuepriority_np(const pthread_workqueue_attr_t * attr, int * qprio);
  58 /* WORKQ_HIGH/DEFAULT/LOW_PRIOQUEUE are the only valid values */
  59 int pthread_workqueue_attr_setqueuepriority_np(pthread_workqueue_attr_t * attr, int qprio);
  60 int pthread_workqueue_attr_getovercommit_np(const pthread_workqueue_attr_t * attr, int * ocommp);
  61 int pthread_workqueue_attr_setovercommit_np(pthread_workqueue_attr_t * attr, int ocomm);
  62
  63
  64 int pthread_workqueue_create_np(pthread_workqueue_t * workqp, const pthread_workqueue_attr_t * attr);
  65 int pthread_workqueue_additem_np(pthread_workqueue_t workq, void ( *workitem_func)(void *), void * workitem_arg, pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp);
  66 /* If the queue value is WORKQ_NUM_PRIOQUEUE, the request for concurrency is for all queues */
  67 int pthread_workqueue_requestconcurrency_np(int queue, int concurrency);
  68 int pthread_workqueue_getovercommit_np(pthread_workqueue_t workq,  unsigned int *ocommp);
  69 /*
  70  * If the arg is non zero, it enables kill on current thread.
  71  * If the arg of zero, it disables kill on current thread.
  72  */
  73 int __pthread_workqueue_setkill(int);
  74 __END_DECLS
  75
  76 #endif /* _POSIX_PTHREAD_WORKQUEUE_H */
  77