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/*-
* Copyright (c) 2011, Mark Heily <mark@heily.com>
* Copyright (c) 2009, Stacey Son <sson@freebsd.org>
* Copyright (c) 2000-2008, Apple Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef _PTWQ_PRIVATE_H
#define _PTWQ_PRIVATE_H 1
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if defined(_WIN32)
# include "windows/platform.h"
#else
# include "posix/platform.h"
#endif
#include "pthread_workqueue.h"
#include "debug.h"
/* The maximum number of workqueues that can be created.
This is based on libdispatch only needing 6 workqueues.
*/
#define PTHREAD_WORKQUEUE_MAX 31
/* The total number of priority levels. */
#define WORKQ_NUM_PRIOQUEUE 3
/* Signatures/magic numbers. */
#define PTHREAD_WORKQUEUE_SIG 0xBEBEBEBE
#define PTHREAD_WORKQUEUE_ATTR_SIG 0xBEBEBEBE
/* Whether to use real-time threads for the workers if available */
extern unsigned int PWQ_RT_THREADS;
extern unsigned int PWQ_SPIN_USEC;
extern unsigned int PWQ_SPIN_THREADS;
/* A limit of the number of cpu:s that we view as available, useful when e.g. using processor sets */
extern unsigned int PWQ_ACTIVE_CPU;
#if __GNUC__
#define fastpath(x) ((__typeof__(x))__builtin_expect((long)(x), ~0l))
#define slowpath(x) ((__typeof__(x))__builtin_expect((long)(x), 0l))
#else
#define fastpath(x) (x)
#define slowpath(x) (x)
#endif
#define CACHELINE_SIZE 64
#define ROUND_UP_TO_CACHELINE_SIZE(x) (((x) + (CACHELINE_SIZE - 1)) & ~(CACHELINE_SIZE - 1))
/*
* The work item cache, has three different optional implementations:
* 1. No cache, just normal malloc/free using the standard malloc library in use
* 2. Libumem based object cache, requires linkage with libumem - for non-Solaris see http://labs.omniti.com/labs/portableumem
* this is the most balanced cache supporting migration across threads of allocated/freed witems
* 3. TSD based cache, modelled on libdispatch continuation implementation, can lead to imbalance with assymetric
* producer/consumer threads as allocated memory is cached by the thread freeing it
*/
#define WITEM_CACHE_TYPE 1 // Set to 1, 2 or 3 to specify witem cache implementation to use
struct work {
STAILQ_ENTRY(work) item_entry;
void (*func)(void *);
void *func_arg;
unsigned int flags;
unsigned int gencount;
#if (WITEM_CACHE_TYPE == 3)
struct work *volatile wi_next;
#endif
};
struct _pthread_workqueue {
unsigned int sig; /* Unique signature for this structure */
unsigned int flags;
int queueprio;
int overcommit;
unsigned int wqlist_index;
STAILQ_HEAD(,work) item_listhead;
pthread_spinlock_t mtx;
#ifdef WORKQUEUE_PLATFORM_SPECIFIC
WORKQUEUE_PLATFORM_SPECIFIC;
#endif
};
/* manager.c */
int manager_init(void);
unsigned long manager_peek(const char *);
void manager_workqueue_create(struct _pthread_workqueue *);
void manager_workqueue_additem(struct _pthread_workqueue *, struct work *);
struct work *witem_alloc(void (*func)(void *), void *func_arg); // returns a properly initialized witem
void witem_free(struct work *wi);
int witem_cache_init(void);
void witem_cache_cleanup(void *value);
#endif /* _PTWQ_PRIVATE_H */
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