| paul | 354d119 | 2005-04-25 16:26:42 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Quagga Work Queues. |
| 3 | * |
| 4 | * Copyright (C) 2005 Sun Microsystems, Inc. |
| 5 | * |
| 6 | * This file is part of Quagga. |
| 7 | * |
| 8 | * Quagga is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2, or (at your option) any |
| 11 | * later version. |
| 12 | * |
| 13 | * Quagga is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with Quagga; see the file COPYING. If not, write to the Free |
| 20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 21 | * 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | #ifndef _QUAGGA_WORK_QUEUE_H |
| 25 | #define _QUAGGA_WORK_QUEUE_H |
| 26 | |
| 27 | /* Work queue default hold and cycle times - millisec */ |
| 28 | #define WORK_QUEUE_DEFAULT_HOLD 50 /* hold time for initial run of a queue */ |
| 29 | #define WORK_QUEUE_DEFAULT_DELAY 10 /* minimum delay between queue runs */ |
| 30 | |
| 31 | /* action value, for use by item processor and item error handlers */ |
| 32 | typedef enum |
| 33 | { |
| 34 | WQ_SUCCESS = 0, |
| 35 | WQ_ERROR, /* Error, run error handler if provided */ |
| 36 | WQ_RETRY_NOW, /* retry immediately */ |
| 37 | WQ_RETRY_LATER, /* retry later, cease processing work queue */ |
| 38 | WQ_REQUEUE /* requeue item, continue processing work queue */ |
| 39 | } wq_item_status; |
| 40 | |
| 41 | /* A single work queue item, unsurprisingly */ |
| 42 | struct work_queue_item |
| 43 | { |
| 44 | void *data; /* opaque data */ |
| 45 | unsigned short retry_count; /* number of times retried */ |
| 46 | }; |
| 47 | |
| 48 | struct work_queue |
| 49 | { |
| 50 | struct thread_master *master; /* thread master */ |
| 51 | struct thread *thread; /* thread, if one is active */ |
| 52 | char *name; /* work queue name */ |
| 53 | |
| 54 | /* specification for this work queue */ |
| 55 | struct { |
| 56 | /* work function to process items with */ |
| 57 | wq_item_status (*workfunc) (void *); |
| 58 | |
| 59 | /* error handling function, optional */ |
| 60 | void (*errorfunc) (struct work_queue *, struct work_queue_item *); |
| 61 | |
| 62 | /* callback to delete user specific item data */ |
| 63 | void (*del_item_data) (void *); |
| 64 | |
| 65 | /* max number of retries to make for item that errors */ |
| 66 | unsigned int max_retries; |
| 67 | |
| 68 | unsigned int hold; /* hold time for first run, in ms */ |
| 69 | unsigned int delay; /* min delay between queue runs, in ms */ |
| 70 | } spec; |
| 71 | |
| 72 | /* remaining fields should be opaque to users */ |
| 73 | struct list *items; /* queue item list */ |
| 74 | unsigned long runs; /* runs count */ |
| 75 | |
| 76 | struct { |
| 77 | unsigned int best; |
| 78 | unsigned int granularity; |
| 79 | unsigned long total; |
| 80 | } cycles; /* cycle counts */ |
| 81 | }; |
| 82 | |
| 83 | /* User API */ |
| 84 | struct work_queue *work_queue_new (struct thread_master *, const char *); |
| 85 | void work_queue_free (struct work_queue *); |
| 86 | void work_queue_add (struct work_queue *, void *); |
| 87 | |
| 88 | /* Helpers, exported for thread.c and command.c */ |
| 89 | int work_queue_run (struct thread *); |
| 90 | extern struct cmd_element show_work_queues_cmd; |
| 91 | #endif /* _QUAGGA_WORK_QUEUE_H */ |