summaryrefslogtreecommitdiff
path: root/lib/share.c
blob: e6b8e7a1f3775a3511923c23bd7c744858a8414f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/

#include "setup.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include "urldata.h"
#include "share.h"
#include "curl_memory.h"

/* The last #include file should be: */
#include "memdebug.h"

CURLSH *
curl_share_init(void)
{
  struct Curl_share *share = calloc(1, sizeof(struct Curl_share));
  if(share)
    share->specifier |= (1<<CURL_LOCK_DATA_SHARE);

  return share;
}

#undef curl_share_setopt
CURLSHcode
curl_share_setopt(CURLSH *sh, CURLSHoption option, ...)
{
  struct Curl_share *share = (struct Curl_share *)sh;
  va_list param;
  int type;
  curl_lock_function lockfunc;
  curl_unlock_function unlockfunc;
  void *ptr;

  if(share->dirty)
    /* don't allow setting options while one or more handles are already
       using this share */
    return CURLSHE_IN_USE;

  va_start(param, option);

  switch(option) {
  case CURLSHOPT_SHARE:
    /* this is a type this share will share */
    type = va_arg(param, int);
    share->specifier |= (1<<type);
    switch( type ) {
    case CURL_LOCK_DATA_DNS:
      if(!share->hostcache) {
        share->hostcache = Curl_mk_dnscache();
        if(!share->hostcache)
          return CURLSHE_NOMEM;
      }
      break;

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
    case CURL_LOCK_DATA_COOKIE:
      if(!share->cookies) {
        share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE );
        if(!share->cookies)
          return CURLSHE_NOMEM;
      }
      break;
#endif   /* CURL_DISABLE_HTTP */

    case CURL_LOCK_DATA_SSL_SESSION: /* not supported (yet) */
    case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */

    default:
      return CURLSHE_BAD_OPTION;
    }
    break;

  case CURLSHOPT_UNSHARE:
    /* this is a type this share will no longer share */
    type = va_arg(param, int);
    share->specifier &= ~(1<<type);
    switch( type )
    {
      case CURL_LOCK_DATA_DNS:
        if(share->hostcache) {
          Curl_hash_destroy(share->hostcache);
          share->hostcache = NULL;
        }
        break;

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
      case CURL_LOCK_DATA_COOKIE:
        if(share->cookies) {
          Curl_cookie_cleanup(share->cookies);
          share->cookies = NULL;
        }
        break;
#endif   /* CURL_DISABLE_HTTP */

      case CURL_LOCK_DATA_SSL_SESSION:
        break;

      case CURL_LOCK_DATA_CONNECT:
        break;

      default:
        return CURLSHE_BAD_OPTION;
    }
    break;

  case CURLSHOPT_LOCKFUNC:
    lockfunc = va_arg(param, curl_lock_function);
    share->lockfunc = lockfunc;
    break;

  case CURLSHOPT_UNLOCKFUNC:
    unlockfunc = va_arg(param, curl_unlock_function);
    share->unlockfunc = unlockfunc;
    break;

  case CURLSHOPT_USERDATA:
    ptr = va_arg(param, void *);
    share->clientdata = ptr;
    break;

  default:
    return CURLSHE_BAD_OPTION;
  }

  return CURLSHE_OK;
}

CURLSHcode
curl_share_cleanup(CURLSH *sh)
{
  struct Curl_share *share = (struct Curl_share *)sh;

  if(share == NULL)
    return CURLSHE_INVALID;

  if(share->lockfunc)
    share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
                    share->clientdata);

  if(share->dirty) {
    if(share->unlockfunc)
      share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
    return CURLSHE_IN_USE;
  }

  if(share->hostcache) {
    Curl_hash_destroy(share->hostcache);
    share->hostcache = NULL;
  }

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  if(share->cookies)
    Curl_cookie_cleanup(share->cookies);
#endif   /* CURL_DISABLE_HTTP */

  if(share->unlockfunc)
    share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
  free(share);

  return CURLSHE_OK;
}


CURLSHcode
Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
                curl_lock_access accesstype)
{
  struct Curl_share *share = data->share;

  if(share == NULL)
    return CURLSHE_INVALID;

  if(share->specifier & (1<<type)) {
    if(share->lockfunc) /* only call this if set! */
      share->lockfunc(data, type, accesstype, share->clientdata);
  }
  /* else if we don't share this, pretend successful lock */

  return CURLSHE_OK;
}

CURLSHcode
Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
{
  struct Curl_share *share = data->share;

  if(share == NULL)
    return CURLSHE_INVALID;

  if(share->specifier & (1<<type)) {
    if(share->unlockfunc) /* only call this if set! */
      share->unlockfunc (data, type, share->clientdata);
  }

  return CURLSHE_OK;
}