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39381776 KP |
1 | /* |
2 | * $Id$ | |
3 | * | |
46b51147 | 4 | * Copyright © 2003 Keith Packard |
39381776 KP |
5 | * |
6 | * Permission to use, copy, modify, distribute, and sell this software and its | |
7 | * documentation for any purpose is hereby granted without fee, provided that | |
8 | * the above copyright notice appear in all copies and that both that | |
9 | * copyright notice and this permission notice appear in supporting | |
10 | * documentation, and that the name of Keith Packard not be used in | |
11 | * advertising or publicity pertaining to distribution of the software without | |
12 | * specific, written prior permission. Keith Packard makes no | |
13 | * representations about the suitability of this software for any purpose. It | |
14 | * is provided "as is" without express or implied warranty. | |
15 | * | |
16 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
18 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
19 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
20 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
21 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
22 | * PERFORMANCE OF THIS SOFTWARE. | |
23 | */ | |
24 | ||
25 | @RET@ FcAtomic * | |
26 | @FUNC@ FcAtomicCreate | |
27 | @TYPE1@ const FcChar8 * @ARG1@ file | |
28 | @PURPOSE@ create an FcAtomic object | |
29 | @DESC@ | |
30 | Creates a data structure containing data needed to control access to <parameter>file</parameter>. | |
31 | Writing is done to a separate file. Once that file is complete, the original | |
32 | configuration file is atomically replaced so that reading process always see | |
33 | a consistent and complete file without the need to lock for reading. | |
34 | @@ | |
35 | ||
36 | @RET@ FcBool | |
37 | @FUNC@ FcAtomicLock | |
38 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
39 | @PURPOSE@ lock a file | |
40 | @DESC@ | |
910db318 KP |
41 | Attempts to lock the file referenced by <parameter>atomic</parameter>. |
42 | Returns FcFalse if the file is already locked, else returns FcTrue and | |
43 | leaves the file locked. | |
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44 | @@ |
45 | ||
46 | @RET@ FcChar8 * | |
47 | @FUNC@ FcAtomicNewFile | |
48 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
49 | @PURPOSE@ return new temporary file name | |
50 | @DESC@ | |
51 | Returns the filename for writing a new version of the file referenced | |
52 | by <parameter>atomic</parameter>. | |
53 | @@ | |
54 | ||
55 | @RET@ FcChar8 * | |
56 | @FUNC@ FcAtomicOrigFile | |
57 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
58 | @PURPOSE@ return original file name | |
59 | @DESC@ | |
60 | Returns the file refernced by <parameter>atomic</parameter>. | |
61 | @@ | |
62 | ||
63 | @RET@ FcBool | |
64 | @FUNC@ FcAtomicReplaceOrig | |
65 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
66 | @PURPOSE@ replace original with new | |
67 | @DESC@ | |
fab44f3c KP |
68 | Replaces the original file referenced by <parameter>atomic</parameter> with |
69 | the new file. Returns FcFalse if the file cannot be replaced due to | |
70 | permission issues in the filesystem. Otherwise returns FcTrue. | |
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71 | @@ |
72 | ||
73 | @RET@ void | |
74 | @FUNC@ FcAtomicDeleteNew | |
75 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
76 | @PURPOSE@ delete new file | |
77 | @DESC@ | |
78 | Deletes the new file. Used in error recovery to back out changes. | |
79 | @@ | |
80 | ||
81 | @RET@ void | |
82 | @FUNC@ FcAtomicUnlock | |
83 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
84 | @PURPOSE@ unlock a file | |
85 | @DESC@ | |
86 | Unlocks the file. | |
87 | @@ | |
88 | ||
89 | @RET@ void | |
90 | @FUNC@ FcAtomicDestroy | |
91 | @TYPE1@ FcAtomic * @ARG1@ atomic | |
92 | @PURPOSE@ destroy an FcAtomic object | |
93 | @DESC@ | |
94 | Destroys <parameter>atomic</parameter>. | |
95 | @@ |