chiark / gitweb /
Test universal hashing and fix bugs.
[mLib] / pool-file.c
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d94be366 1/* -*-c-*-
2 *
3 * $Id: pool-file.c,v 1.1 2000/07/16 12:28:48 mdw Exp $
4 *
5 * File handles in resource pools
6 *
7 * (c) 2000 Straylight/Edgeware
8 */
9
10/*----- Licensing notice --------------------------------------------------*
11 *
12 * This file is part of the mLib utilities library.
13 *
14 * mLib is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
18 *
19 * mLib is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
23 *
24 * You should have received a copy of the GNU Library General Public
25 * License along with mLib; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
27 * MA 02111-1307, USA.
28 */
29
30/*----- Revision history --------------------------------------------------*
31 *
32 * $Log: pool-file.c,v $
33 * Revision 1.1 2000/07/16 12:28:48 mdw
34 * Support for resource pools, based on the Apache model.
35 *
36 */
37
38/*----- Header files ------------------------------------------------------*/
39
40#include <stdio.h>
41
42#include "pool.h"
43
44/*----- Main code ---------------------------------------------------------*/
45
46/* --- @pool_fopen@ --- *
47 *
48 * Arguments: @pool *p@ = pointer to a pool
49 * @const char *file@ = name of the file to open
50 * @const char *how@ = string specifying opening parameters
51 *
52 * Returns: A pointer to a pool resource containing an open file handle,
53 * or null if the file open filed.
54 *
55 * Use: Opens a file so that it will be freed again when a pool is
56 * destroyed.
57 */
58
59static void pf_destroy(pool_resource *r) { pool_fclose((pool_file *)r); }
60
61pool_file *pool_fopen(pool *p, const char *file, const char *how)
62{
63 FILE *fp;
64 pool_file *pf;
65
66 if ((fp = fopen(file, how)) == 0)
67 return (0);
68 pf = pool_alloc(p, sizeof(pool_file));
69 POOL_ADD(p, &pf->r, pf_destroy);
70 pf->fp = fp;
71 return (pf);
72}
73
74/* --- @pool_fclose@ --- *
75 *
76 * Arguments: @pool_file *pf@ = pointer to a file resource
77 *
78 * Returns: The response from the @fclose@ function.
79 *
80 * Use: Closes a file. It is not an error to close a file multiple
81 * times.
82 */
83
84int pool_fclose(pool_file *pf)
85{
86 if (!pf->r.destroy)
87 return (0);
88 pf->r.destroy = 0;
89 return (fclose(pf->fp));
90}
91
92/*----- That's all, folks -------------------------------------------------*/