Utilities/cmcurl-7.19.0/lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
   9  *
  10  * This software is licensed as described in the file COPYING, which
  11  * you should have received as part of this distribution. The terms
  12  * are also available at http://curl.haxx.se/docs/copyright.html.
  13  *
  14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  15  * copies of the Software, and permit persons to whom the Software is
  16  * furnished to do so, under the terms of the COPYING file.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  * $Id: share.c,v 1.1.1.1 2008-09-23 16:32:05 hoffman Exp $
  22  ***************************************************************************/
  23
  24 #include "setup.h"
  25 #include <stdarg.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <curl/curl.h>
  29 #include "urldata.h"
  30 #include "share.h"
  31 #include "memory.h"
  32
  33 /* The last #include file should be: */
  34 #include "memdebug.h"
  35
  36 CURLSH *
  37 curl_share_init(void)
  38 {
  39   struct Curl_share *share =
  40     (struct Curl_share *)malloc(sizeof(struct Curl_share));
  41   if(share) {
  42     memset (share, 0, sizeof(struct Curl_share));
  43     share->specifier |= (1<<CURL_LOCK_DATA_SHARE);
  44   }
  45
  46   return share;
  47 }
  48
  49 #undef curl_share_setopt
  50 CURLSHcode
  51 curl_share_setopt(CURLSH *sh, CURLSHoption option, ...)
  52 {
  53   struct Curl_share *share = (struct Curl_share *)sh;
  54   va_list param;
  55   int type;
  56   curl_lock_function lockfunc;
  57   curl_unlock_function unlockfunc;
  58   void *ptr;
  59
  60   if(share->dirty)
  61     /* don't allow setting options while one or more handles are already
  62        using this share */
  63     return CURLSHE_IN_USE;
  64
  65   va_start(param, option);
  66
  67   switch(option) {
  68   case CURLSHOPT_SHARE:
  69     /* this is a type this share will share */
  70     type = va_arg(param, int);
  71     share->specifier |= (1<<type);
  72     switch( type ) {
  73     case CURL_LOCK_DATA_DNS:
  74       if(!share->hostcache) {
  75         share->hostcache = Curl_mk_dnscache();
  76         if(!share->hostcache)
  77           return CURLSHE_NOMEM;
  78       }
  79       break;
  80
  81 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  82     case CURL_LOCK_DATA_COOKIE:
  83       if(!share->cookies) {
  84         share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE );
  85         if(!share->cookies)
  86           return CURLSHE_NOMEM;
  87       }
  88       break;
  89 #endif   /* CURL_DISABLE_HTTP */
  90
  91     case CURL_LOCK_DATA_SSL_SESSION: /* not supported (yet) */
  92     case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */
  93
  94     default:
  95       return CURLSHE_BAD_OPTION;
  96     }
  97     break;
  98
  99   case CURLSHOPT_UNSHARE:
 100     /* this is a type this share will no longer share */
 101     type = va_arg(param, int);
 102     share->specifier &= ~(1<<type);
 103     switch( type )
 104     {
 105       case CURL_LOCK_DATA_DNS:
 106         if(share->hostcache) {
 107           Curl_hash_destroy(share->hostcache);
 108           share->hostcache = NULL;
 109         }
 110         break;
 111
 112 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 113       case CURL_LOCK_DATA_COOKIE:
 114         if(share->cookies) {
 115           Curl_cookie_cleanup(share->cookies);
 116           share->cookies = NULL;
 117         }
 118         break;
 119 #endif   /* CURL_DISABLE_HTTP */
 120
 121       case CURL_LOCK_DATA_SSL_SESSION:
 122         break;
 123
 124       case CURL_LOCK_DATA_CONNECT:
 125         break;
 126
 127       default:
 128         return CURLSHE_BAD_OPTION;
 129     }
 130     break;
 131
 132   case CURLSHOPT_LOCKFUNC:
 133     lockfunc = va_arg(param, curl_lock_function);
 134     share->lockfunc = lockfunc;
 135     break;
 136
 137   case CURLSHOPT_UNLOCKFUNC:
 138     unlockfunc = va_arg(param, curl_unlock_function);
 139     share->unlockfunc = unlockfunc;
 140     break;
 141
 142   case CURLSHOPT_USERDATA:
 143     ptr = va_arg(param, void *);
 144     share->clientdata = ptr;
 145     break;
 146
 147   default:
 148     return CURLSHE_BAD_OPTION;
 149   }
 150
 151   return CURLSHE_OK;
 152 }
 153
 154 CURLSHcode
 155 curl_share_cleanup(CURLSH *sh)
 156 {
 157   struct Curl_share *share = (struct Curl_share *)sh;
 158
 159   if(share == NULL)
 160     return CURLSHE_INVALID;
 161
 162   if(share->lockfunc)
 163     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 164                     share->clientdata);
 165
 166   if(share->dirty) {
 167     if(share->unlockfunc)
 168       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 169     return CURLSHE_IN_USE;
 170   }
 171
 172   if(share->hostcache)
 173     Curl_hash_destroy(share->hostcache);
 174
 175 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 176   if(share->cookies)
 177     Curl_cookie_cleanup(share->cookies);
 178 #endif   /* CURL_DISABLE_HTTP */
 179
 180   if(share->unlockfunc)
 181     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 182   free(share);
 183
 184   return CURLSHE_OK;
 185 }
 186
 187
 188 CURLSHcode
 189 Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
 190                 curl_lock_access accesstype)
 191 {
 192   struct Curl_share *share = data->share;
 193
 194   if(share == NULL)
 195     return CURLSHE_INVALID;
 196
 197   if(share->specifier & (1<<type)) {
 198     if(share->lockfunc) /* only call this if set! */
 199       share->lockfunc(data, type, accesstype, share->clientdata);
 200   }
 201   /* else if we don't share this, pretend successful lock */
 202
 203   return CURLSHE_OK;
 204 }
 205
 206 CURLSHcode
 207 Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
 208 {
 209   struct Curl_share *share = data->share;
 210
 211   if(share == NULL)
 212     return CURLSHE_INVALID;
 213
 214   if(share->specifier & (1<<type)) {
 215     if(share->unlockfunc) /* only call this if set! */
 216       share->unlockfunc (data, type, share->clientdata);
 217   }
 218
 219   return CURLSHE_OK;
 220 }