[1343] | 1 | /*
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| 2 | * Copyright (C) 1994-1998, Index Data.
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| 3 | * See the file LICENSE for details.
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| 4 | * Sebastian Hammer, Adam Dickmeiss
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| 5 | *
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| 6 | * $Log$
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| 7 | * Revision 1.1 2000/08/03 03:11:41 johnmcp
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| 8 | * Added the YAZ toolkit source to the packages directory (for z39.50 stuff)
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| 9 | *
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| 10 | * Revision 1.7 1999/11/30 13:47:12 adam
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| 11 | * Improved installation. Moved header files to include/yaz.
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| 12 | *
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| 13 | * Revision 1.6 1998/02/11 11:53:35 adam
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| 14 | * Changed code so that it compiles as C++.
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| 15 | *
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| 16 | * Revision 1.5 1998/02/10 11:03:56 adam
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| 17 | * Added support for extended handlers in backend server interface.
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| 18 | *
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| 19 | * Revision 1.4 1997/10/27 13:55:03 adam
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| 20 | * Fixed memory leak: member response wasn't freed when queue
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| 21 | * was destroyed.
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| 22 | *
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| 23 | * Revision 1.3 1997/09/01 08:53:00 adam
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| 24 | * New windows NT/95 port using MSV5.0. The test server 'ztest' was
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| 25 | * moved a separate directory. MSV5.0 project server.dsp created.
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| 26 | * As an option, the server can now operate as an NT service.
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| 27 | *
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| 28 | * Revision 1.2 1995/11/01 13:54:57 quinn
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| 29 | * Minor adjustments
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| 30 | *
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| 31 | * Revision 1.1 1995/05/15 12:12:22 quinn
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| 32 | * Request queue.
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| 33 | *
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | /*
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| 38 | * Simple queue management.
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| 39 | *
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| 40 | * We also use the request-freelist to store encoding buffers, rather than
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| 41 | * freeing and xmalloc'ing them on each cycle.
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| 42 | */
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| 43 |
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| 44 | #include <stdlib.h>
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| 45 |
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| 46 | #include <yaz/xmalloc.h>
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| 47 | #include "session.h"
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| 48 |
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| 49 | void request_enq(request_q *q, request *r)
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| 50 | {
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| 51 | if (q->tail)
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| 52 | q->tail->next = r;
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| 53 | else
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| 54 | q->head = r;
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| 55 | q->tail = r;
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| 56 | q->num++;
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| 57 | }
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| 58 |
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| 59 | request *request_head(request_q *q)
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| 60 | {
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| 61 | return q->head;
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| 62 | }
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| 63 |
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| 64 | request *request_deq(request_q *q)
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| 65 | {
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| 66 | request *r = q->head;
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| 67 |
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| 68 | if (!r)
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| 69 | return 0;
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| 70 | q->head = q->head->next;
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| 71 | if (!q->head)
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| 72 | q->tail = 0;
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| 73 | q->num--;
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| 74 | return r;
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| 75 | }
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| 76 |
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| 77 | void request_initq(request_q *q)
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| 78 | {
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| 79 | q->head = q->tail = q->list = 0;
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| 80 | q->num = 0;
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| 81 | }
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| 82 |
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| 83 | void request_delq(request_q *q)
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| 84 | {
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| 85 | request *r1, *r = q->list;
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| 86 | while (r)
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| 87 | {
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| 88 | xfree (r->response);
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| 89 | r1 = r;
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| 90 | r = r->next;
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| 91 | xfree (r1);
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| 92 | }
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| 93 | }
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| 94 |
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| 95 | request *request_get(request_q *q)
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| 96 | {
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| 97 | request *r = q->list;
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| 98 |
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| 99 | if (r)
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| 100 | q->list = r->next;
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| 101 | else
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| 102 | {
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| 103 | if (!(r = (request *)xmalloc(sizeof(*r))))
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| 104 | abort();
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| 105 | r->response = 0;
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| 106 | r->size_response = 0;
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| 107 | }
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| 108 | r->q = q;
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| 109 | r->len_refid = 0;
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| 110 | r->refid = 0;
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| 111 | r->request = 0;
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| 112 | r->request_mem = 0;
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| 113 | r->len_response = 0;
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| 114 | r->clientData = 0;
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| 115 | r->state = REQUEST_IDLE;
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| 116 | r->next = 0;
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| 117 | return r;
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| 118 | }
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| 119 |
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| 120 | void request_release(request *r)
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| 121 | {
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| 122 | request_q *q = r->q;
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| 123 | r->next = q->list;
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| 124 | q->list = r;
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| 125 | }
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| 126 |
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