| [5641] | 1 | /// ----------------------------------------*- mode: C++; -*--
|
|---|
| 2 | /// @file fastqueue.h
|
|---|
| 3 | /// Fast and thread-safe queue to send/receive messages between
|
|---|
| 4 | /// POSIX threads
|
|---|
| 5 | /// ----------------------------------------------------------
|
|---|
| 6 | /// $Id: fastqueue.h 2872 2008-02-18 10:58:03Z bless $
|
|---|
| 7 | /// $HeadURL: https://svn.ipv6.tm.uka.de/nsis/protlib/trunk/fastqueue/fastqueue.h $
|
|---|
| 8 | // ===========================================================
|
|---|
| 9 | //
|
|---|
| 10 | // Copyright (C) 2005-2007, all rights reserved by
|
|---|
| 11 | // - Institute of Telematics, Universitaet Karlsruhe (TH)
|
|---|
| 12 | //
|
|---|
| 13 | // More information and contact:
|
|---|
| 14 | // https://projekte.tm.uka.de/trac/NSIS
|
|---|
| 15 | //
|
|---|
| 16 | // This program is free software; you can redistribute it and/or modify
|
|---|
| 17 | // it under the terms of the GNU General Public License as published by
|
|---|
| 18 | // the Free Software Foundation; version 2 of the License
|
|---|
| 19 | //
|
|---|
| 20 | // This program is distributed in the hope that it will be useful,
|
|---|
| 21 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 22 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 23 | // GNU General Public License for more details.
|
|---|
| 24 | //
|
|---|
| 25 | // You should have received a copy of the GNU General Public License along
|
|---|
| 26 | // with this program; if not, write to the Free Software Foundation, Inc.,
|
|---|
| 27 | // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|---|
| 28 | //
|
|---|
| 29 | // ===========================================================
|
|---|
| 30 | /**
|
|---|
| 31 | * @ingroup fastqueue Fast Queue
|
|---|
| 32 | * @{
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | /** @file
|
|---|
| 36 | * Fast and thread-safe queue to send/receive messages between POSIX threads
|
|---|
| 37 | * This can be used as a port for a thread to receive messages (from any thread).
|
|---|
| 38 | * The implementations allows for arbitrary long queues, but queues grow by
|
|---|
| 39 | * element blocks containing ELEMENT_BLOCKSIZE elements. This avoids frequent
|
|---|
| 40 | * malloc/free operations.
|
|---|
| 41 | */
|
|---|
| 42 |
|
|---|
| 43 | #ifndef QUEUE_TYPE
|
|---|
| 44 | #define QUEUE_TYPE
|
|---|
| 45 |
|
|---|
| 46 | #include <pthread.h>
|
|---|
| 47 |
|
|---|
| 48 | #define ELEMENT_BLOCKSIZE 64
|
|---|
| 49 | #define MAX_QUEUENAME_LENGTH 32
|
|---|
| 50 |
|
|---|
| 51 |
|
|---|
| 52 | /* queue element block type */
|
|---|
| 53 | typedef struct queue_elblock_struct
|
|---|
| 54 | {
|
|---|
| 55 | void *element[ELEMENT_BLOCKSIZE];
|
|---|
| 56 | int read, write;
|
|---|
| 57 | struct queue_elblock_struct *next_block;
|
|---|
| 58 | }
|
|---|
| 59 | queue_elblock_t;
|
|---|
| 60 |
|
|---|
| 61 |
|
|---|
| 62 | typedef struct queue_struct
|
|---|
| 63 | {
|
|---|
| 64 | pthread_mutex_t mutex;
|
|---|
| 65 | pthread_mutexattr_t mutex_attr;
|
|---|
| 66 | pthread_cond_t cond;
|
|---|
| 67 |
|
|---|
| 68 | unsigned long nr_of_elements;
|
|---|
| 69 | unsigned long exp_nr_of_elements;
|
|---|
| 70 | int exp_enabled;
|
|---|
| 71 | queue_elblock_t *first_block;
|
|---|
| 72 | queue_elblock_t *last_block;
|
|---|
| 73 | queue_elblock_t *exp_first_block;
|
|---|
| 74 | queue_elblock_t *exp_last_block;
|
|---|
| 75 | //#ifdef QUEUELEN
|
|---|
| 76 | unsigned long queue_maxlength;
|
|---|
| 77 | //#endif
|
|---|
| 78 | char name[MAX_QUEUENAME_LENGTH +1];
|
|---|
| 79 | }
|
|---|
| 80 | queue_t;
|
|---|
| 81 |
|
|---|
| 82 | extern queue_t *create_queue (const char *name);
|
|---|
| 83 | extern int enqueue_element_signal (queue_t * queuehead, void *element);
|
|---|
| 84 | extern int enqueue_element_expedited_signal (queue_t * queuehead, void *element, int exp);
|
|---|
| 85 | extern void *dequeue_element_wait (queue_t * queuehead);
|
|---|
| 86 | extern void *dequeue_element_timedwait(queue_t *queuehead, const struct timespec *tspec);
|
|---|
| 87 | extern int destroy_queue (queue_t * queuehead);
|
|---|
| 88 | extern void *dequeue_element_nonblocking(queue_t * queuehead);
|
|---|
| 89 | extern unsigned long queue_nr_of_elements(queue_t *queue);
|
|---|
| 90 | extern int queue_is_expedited_enabled(queue_t *queue);
|
|---|
| 91 | extern int queue_enable_expedited(queue_t *queue, int exp);
|
|---|
| 92 |
|
|---|
| 93 | #endif
|
|---|
| 94 |
|
|---|
| 95 | //@}
|
|---|
