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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2017 Joyent, Inc.
*/
#ifndef _SYS_SQUEUE_H
#define _SYS_SQUEUE_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* Originally in illumos, we had an IP-centric view of the serialization queue
* abstraction. While that has useful properties, the implementation of squeues
* hardcodes various parts of the implementation of IP into it which makes it
* unsuitable for other consumers. To enable them, we created another interface,
* but opted not to port all of the functionality that IP uses in the form of
* ip_squeue.c As other consumers need the functionality that IP has in squeues,
* then we'll come up with more genericized methods and add that functionality
* to <sys/gsqueue.h>. Please do not continue to use this header.
*/
#include <sys/types.h>
#include <sys/processor.h>
#include <sys/stream.h>
struct squeue_s;
typedef struct squeue_s squeue_t;
#define SET_SQUEUE(mp, proc, arg) { \
ASSERT((mp)->b_prev == NULL); \
ASSERT((mp)->b_next == NULL); \
(mp)->b_queue = (queue_t *)(proc); \
(mp)->b_prev = (mblk_t *)(arg); \
}
#define SQ_FILL 0x0001
#define SQ_NODRAIN 0x0002
#define SQ_PROCESS 0x0004
#define SQUEUE_ENTER(sqp, head, tail, cnt, ira, flag, tag) { \
sqp->sq_enter(sqp, head, tail, cnt, ira, flag, tag); \
}
#define SQUEUE_ENTER_ONE(sqp, mp, proc, arg, ira, flag, tag) { \
ASSERT(mp->b_next == NULL); \
ASSERT(mp->b_prev == NULL); \
SET_SQUEUE(mp, proc, arg); \
SQUEUE_ENTER(sqp, mp, mp, 1, ira, flag, tag); \
}
/*
* May be called only by a thread executing in the squeue. The thread must
* not continue to execute any code needing squeue protection after calling
* this macro. Please see the comments in squeue.c for more details.
*/
#define SQUEUE_SWITCH(connp, new_sqp) \
(connp)->conn_sqp = new_sqp;
/*
* Facility-special private data in squeues.
*/
typedef enum {
SQPRIVATE_TCP,
SQPRIVATE_MAX
} sqprivate_t;
struct ip_recv_attr_s;
extern void squeue_init(void);
extern squeue_t *squeue_create(pri_t, boolean_t);
extern void squeue_bind(squeue_t *, processorid_t);
extern void squeue_unbind(squeue_t *);
extern void squeue_enter(squeue_t *, mblk_t *, mblk_t *,
uint32_t, struct ip_recv_attr_s *, int, uint8_t);
extern uintptr_t *squeue_getprivate(squeue_t *, sqprivate_t);
extern void squeue_destroy(squeue_t *);
struct conn_s;
extern int squeue_synch_enter(struct conn_s *, mblk_t *);
extern void squeue_synch_exit(struct conn_s *, int);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SQUEUE_H */
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