dlls/crypt32/context.c

   1 /*
   2  * Copyright 2006 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18 #include <assert.h>
  19 #include <stdarg.h>
  20 #include "windef.h"
  21 #include "winbase.h"
  22 #include "wincrypt.h"
  23 #include "wine/debug.h"
  24 #include "crypt32_private.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(context);
  27
  28 void *Context_CreateDataContext(size_t contextSize, const context_vtbl_t *vtbl)
  29 {
  30     context_t *context;
  31
  32     context = CryptMemAlloc(sizeof(context_t) + contextSize);
  33     if (!context)
  34         return NULL;
  35
  36     context->vtbl = vtbl;
  37     context->ref = 1;
  38     context->linked = NULL;
  39     context->properties = ContextPropertyList_Create();
  40     if (!context->properties)
  41     {
  42         CryptMemFree(context);
  43         return NULL;
  44     }
  45
  46     TRACE("returning %p\n", context);
  47     return context_ptr(context);
  48 }
  49
  50 context_t *Context_CreateLinkContext(unsigned int contextSize, context_t *linked)
  51 {
  52     context_t *context;
  53
  54     TRACE("(%d, %p)\n", contextSize, linked);
  55
  56     context = CryptMemAlloc(sizeof(context_t) + contextSize);
  57     if (!context)
  58         return NULL;
  59
  60     memcpy(context_ptr(context), context_ptr(linked), contextSize);
  61     context->vtbl = linked->vtbl;
  62     context->ref = 1;
  63     context->linked = linked;
  64     context->properties = linked->properties;
  65     Context_AddRef(linked);
  66
  67     TRACE("returning %p\n", context);
  68     return context;
  69 }
  70
  71 void Context_AddRef(context_t *context)
  72 {
  73     InterlockedIncrement(&context->ref);
  74     TRACE("(%p) ref=%d\n", context, context->ref);
  75 }
  76
  77 BOOL Context_Release(context_t *context)
  78 {
  79     BOOL ret = TRUE;
  80
  81     if (context->ref <= 0)
  82     {
  83         ERR("%p's ref count is %d\n", context, context->ref);
  84         return FALSE;
  85     }
  86     if (InterlockedDecrement(&context->ref) == 0)
  87     {
  88         TRACE("freeing %p\n", context);
  89         if (!context->linked)
  90         {
  91             ContextPropertyList_Free(context->properties);
  92             context->vtbl->free(context);
  93         } else {
  94             Context_Release(context->linked);
  95         }
  96         CryptMemFree(context);
  97     }
  98     else
  99         TRACE("%p's ref count is %d\n", context, context->ref);
 100     return ret;
 101 }
 102
 103 void Context_CopyProperties(const void *to, const void *from)
 104 {
 105     CONTEXT_PROPERTY_LIST *toProperties, *fromProperties;
 106
 107     toProperties = context_from_ptr(to)->properties;
 108     fromProperties = context_from_ptr(from)->properties;
 109     assert(toProperties && fromProperties);
 110     ContextPropertyList_Copy(toProperties, fromProperties);
 111 }