usr/src/uts/common/sys/squeue.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_SQUEUE_H
  27 #define _SYS_SQUEUE_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <sys/types.h>
  34 #include <sys/processor.h>
  35 #include <sys/stream.h>
  36
  37 struct squeue_s;
  38 typedef struct squeue_s squeue_t;
  39
  40 #define SET_SQUEUE(mp, proc, arg) {                             \
  41         ASSERT((mp)->b_prev == NULL);                           \
  42         ASSERT((mp)->b_next == NULL);                           \
  43         (mp)->b_queue = (queue_t *)(proc);                      \
  44         (mp)->b_prev = (mblk_t *)(arg);                         \
  45 }
  46
  47 #define GET_SQUEUE(mp)  ((conn_t *)((mp)->b_prev))->conn_sqp
  48
  49 #define SQ_FILL         0x0001
  50 #define SQ_NODRAIN      0x0002
  51 #define SQ_PROCESS      0x0004
  52
  53 #define SQUEUE_ENTER(sqp, head, tail, cnt, flag, tag) { \
  54         sqp->sq_enter(sqp, head, tail, cnt, flag, tag); \
  55 }
  56
  57 #define SQUEUE_ENTER_ONE(sqp, mp, proc, arg, flag, tag) {       \
  58         ASSERT(mp->b_next == NULL);                             \
  59         ASSERT(mp->b_prev == NULL);                             \
  60         SET_SQUEUE(mp, proc, arg);                              \
  61         SQUEUE_ENTER(sqp, mp, mp, 1, flag, tag);                \
  62 }
  63
  64 /*
  65  * May be called only by a thread executing in the squeue. The thread must
  66  * not continue to execute any code needing squeue protection after calling
  67  * this macro. Please see the comments in squeue.c for more details.
  68  */
  69 #define SQUEUE_SWITCH(connp, new_sqp)                           \
  70         (connp)->conn_sqp = new_sqp;
  71
  72 /*
  73  * Facility-special private data in squeues.
  74  */
  75 typedef enum {
  76         SQPRIVATE_TCP,
  77         SQPRIVATE_MAX
  78 } sqprivate_t;
  79
  80 extern void squeue_init(void);
  81 extern squeue_t *squeue_create(clock_t, pri_t);
  82 extern void squeue_bind(squeue_t *, processorid_t);
  83 extern void squeue_unbind(squeue_t *);
  84 extern void squeue_enter(squeue_t *, mblk_t *, mblk_t *,
  85     uint32_t, int, uint8_t);
  86 extern uintptr_t *squeue_getprivate(squeue_t *, sqprivate_t);
  87
  88 extern int squeue_synch_enter(squeue_t *, void *, uint8_t);
  89 extern void squeue_synch_exit(squeue_t *, void *);
  90
  91 #ifdef  __cplusplus
  92 }
  93 #endif
  94
  95 #endif  /* _SYS_SQUEUE_H */