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ef416fc2 1/*
4400e98d 2 * "$Id: globals.c 5047 2006-02-02 05:14:15Z mike $"
ef416fc2 3 *
4 * Global variable access routines for the Common UNIX Printing System (CUPS).
5 *
6 * Copyright 1997-2006 by Easy Software Products, all rights reserved.
7 *
8 * These coded instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE.txt" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
13 * at:
14 *
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636 USA
19 *
20 * Voice: (301) 373-9600
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
23 *
24 * This file is subject to the Apple OS-Developed Software exception.
25 *
26 * Contents:
27 *
28 * _cupsGlobals() - Return a pointer to thread local storage.
29 * cups_env_init() - Initialize environment variables.
30 * globals_init() - Initialize globals once.
31 * globals_destructor() - Free memory allocated by _cupsGlobals().
32 */
33
34/*
35 * Include necessary headers...
36 */
37
38#include "http-private.h"
39#include "globals.h"
40#include <stdlib.h>
41
42
43/*
44 * 'cups_env_init()' - Initialize environment variables.
45 */
46
47static void
48cups_env_init(_cups_globals_t *g) /* I - Global data */
49{
50 if ((g->cups_datadir = getenv("CUPS_DATADIR")) == NULL)
51 g->cups_datadir = CUPS_DATADIR;
52
53 if ((g->cups_serverbin = getenv("CUPS_SERVERBIN")) == NULL)
54 g->cups_serverbin = CUPS_SERVERBIN;
55
56 if ((g->cups_serverroot = getenv("CUPS_SERVERROOT")) == NULL)
57 g->cups_serverroot = CUPS_SERVERROOT;
58
59 if ((g->cups_statedir = getenv("CUPS_STATEDIR")) == NULL)
60 g->cups_statedir = CUPS_STATEDIR;
61
62 if ((g->localedir = getenv("LOCALEDIR")) == NULL)
63 g->localedir = CUPS_LOCALEDIR;
64}
65
66
67#ifdef HAVE_PTHREAD_H
68/*
69 * Implement per-thread globals...
70 */
71
72/*
73 * Local globals...
74 */
75
76static pthread_key_t globals_key = -1;
77 /* Thread local storage key */
78static pthread_once_t globals_key_once = PTHREAD_ONCE_INIT;
79 /* One-time initialization object */
80
81
82/*
83 * Local functions...
84 */
85
86static void globals_init();
87static void globals_destructor(void *value);
88
89
90/*
91 * '_cupsGlobals()' - Return a pointer to thread local storage
92 */
93
94_cups_globals_t * /* O - Pointer to global data */
95_cupsGlobals(void)
96{
97 _cups_globals_t *globals; /* Pointer to global data */
98
99
100 /*
101 * Initialize the global data exactly once...
102 */
103
104 pthread_once(&globals_key_once, globals_init);
105
106 /*
107 * See if we have allocated the data yet...
108 */
109
110 if ((globals = (_cups_globals_t *)pthread_getspecific(globals_key)) == NULL)
111 {
112 /*
113 * No, allocate memory as set the pointer for the key...
114 */
115
116 globals = calloc(1, sizeof(_cups_globals_t));
117 pthread_setspecific(globals_key, globals);
118
119 /*
120 * Initialize variables that have non-zero values
121 */
122
123 globals->encryption = (http_encryption_t)-1;
124 globals->password_cb = _cupsGetPassword;
125
126 cups_env_init(globals);
127 }
128
129 /*
130 * Return the pointer to the data...
131 */
132
133 return (globals);
134}
135
136
137/*
138 * 'globals_init()' - Initialize globals once.
139 */
140
141static void
142globals_init()
143{
144 pthread_key_create(&globals_key, globals_destructor);
145}
146
147
148/*
149 * 'globals_destructor()' - Free memory allocated by _cupsGlobals().
150 */
151
152static void
153globals_destructor(void *value) /* I - Data to free */
154{
fa73b229 155 _cups_globals_t *cg; /* Global data */
156
157
158 cg = (_cups_globals_t *)value;
159
160 if (cg->http)
161 httpClose(cg->http);
162
4400e98d 163 _cups_sp_flush(cg);
fa73b229 164 _cupsLangFlush(cg);
165 _cupsCharmapFlush(cg);
166 _cupsNormalizeMapsFlush(cg);
167
ef416fc2 168 free(value);
169}
170
171
172#else
173/*
174 * Implement static globals...
175 */
176
177/*
178 * '_cupsGlobals()' - Return a pointer to thread local storage.
179 */
180
181_cups_globals_t * /* O - Pointer to global data */
182_cupsGlobals(void)
183{
184 static _cups_globals_t globals; /* Global data */
185 static int initialized = 0;/* Global data initialized? */
186
187
188 /*
189 * Initialize global data as needed...
190 */
191
192 if (!initialized)
193 {
194 initialized = 1;
195
196 /*
197 * Initialize global variables...
198 */
199
200 memset(&globals, 0, sizeof(globals));
201
202 globals.encryption = (http_encryption_t)-1;
203 globals.password_cb = _cupsGetPassword;
204
205 cups_env_init(&globals);
206 }
207
208 return (&globals);
209}
210#endif /* HAVE_PTHREAD_H */
211
212
213/*
4400e98d 214 * End of "$Id: globals.c 5047 2006-02-02 05:14:15Z mike $".
ef416fc2 215 */