1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Netscape Portable Runtime (NSPR).
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998-2000
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #include <string.h>
39 : #include "primpl.h"
40 :
41 : /* Lock used to lock the environment */
42 : #if defined(_PR_NO_PREEMPT)
43 : #define _PR_NEW_LOCK_ENV()
44 : #define _PR_DELETE_LOCK_ENV()
45 : #define _PR_LOCK_ENV()
46 : #define _PR_UNLOCK_ENV()
47 : #elif defined(_PR_LOCAL_THREADS_ONLY)
48 : extern _PRCPU * _pr_primordialCPU;
49 : static PRIntn _is;
50 : #define _PR_NEW_LOCK_ENV()
51 : #define _PR_DELETE_LOCK_ENV()
52 : #define _PR_LOCK_ENV() if (_pr_primordialCPU) _PR_INTSOFF(_is);
53 : #define _PR_UNLOCK_ENV() if (_pr_primordialCPU) _PR_INTSON(_is);
54 : #else
55 : static PRLock *_pr_envLock = NULL;
56 : #define _PR_NEW_LOCK_ENV() {_pr_envLock = PR_NewLock();}
57 : #define _PR_DELETE_LOCK_ENV() \
58 : { if (_pr_envLock) { PR_DestroyLock(_pr_envLock); _pr_envLock = NULL; } }
59 : #define _PR_LOCK_ENV() { if (_pr_envLock) PR_Lock(_pr_envLock); }
60 : #define _PR_UNLOCK_ENV() { if (_pr_envLock) PR_Unlock(_pr_envLock); }
61 : #endif
62 :
63 : /************************************************************************/
64 :
65 20034 : void _PR_InitEnv(void)
66 : {
67 20034 : _PR_NEW_LOCK_ENV();
68 20034 : }
69 :
70 140 : void _PR_CleanupEnv(void)
71 : {
72 140 : _PR_DELETE_LOCK_ENV();
73 140 : }
74 :
75 398902 : PR_IMPLEMENT(char*) PR_GetEnv(const char *var)
76 : {
77 : char *ev;
78 :
79 398902 : if (!_pr_initialized) _PR_ImplicitInitialization();
80 :
81 398902 : _PR_LOCK_ENV();
82 398902 : ev = _PR_MD_GET_ENV(var);
83 398902 : _PR_UNLOCK_ENV();
84 398902 : return ev;
85 : }
86 :
87 273 : PR_IMPLEMENT(PRStatus) PR_SetEnv(const char *string)
88 : {
89 : PRIntn result;
90 :
91 273 : if (!_pr_initialized) _PR_ImplicitInitialization();
92 :
93 273 : if ( !strchr(string, '=')) return(PR_FAILURE);
94 :
95 273 : _PR_LOCK_ENV();
96 273 : result = _PR_MD_PUT_ENV(string);
97 273 : _PR_UNLOCK_ENV();
98 273 : return (result)? PR_FAILURE : PR_SUCCESS;
99 : }
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