2 * Copyright 2006 Juan Lang
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.
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.
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
23 #include "wine/debug.h"
24 #include "wine/list.h"
25 #include "crypt32_private.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(context);
29 typedef enum _ContextType {
34 typedef struct _BASE_CONTEXT
38 } BASE_CONTEXT, *PBASE_CONTEXT;
40 typedef struct _DATA_CONTEXT
43 ContextType type; /* always ContextTypeData */
44 PCONTEXT_PROPERTY_LIST properties;
45 } DATA_CONTEXT, *PDATA_CONTEXT;
47 typedef struct _LINK_CONTEXT
50 ContextType type; /* always ContextTypeLink */
52 } LINK_CONTEXT, *PLINK_CONTEXT;
54 #define CONTEXT_FROM_BASE_CONTEXT(p, s) ((LPBYTE)(p) - (s))
55 #define BASE_CONTEXT_FROM_CONTEXT(p, s) (PBASE_CONTEXT)((LPBYTE)(p) + (s))
57 void *Context_CreateDataContext(size_t contextSize)
59 void *ret = CryptMemAlloc(contextSize + sizeof(DATA_CONTEXT));
63 PDATA_CONTEXT context = (PDATA_CONTEXT)((LPBYTE)ret + contextSize);
66 context->type = ContextTypeData;
67 context->properties = ContextPropertyList_Create();
68 if (!context->properties)
74 TRACE("returning %p\n", ret);
78 void *Context_CreateLinkContext(unsigned int contextSize, void *linked, unsigned int extra,
81 void *context = CryptMemAlloc(contextSize + sizeof(LINK_CONTEXT) + extra);
83 TRACE("(%d, %p, %d)\n", contextSize, linked, extra);
87 PLINK_CONTEXT linkContext = (PLINK_CONTEXT)BASE_CONTEXT_FROM_CONTEXT(
88 context, contextSize);
89 PBASE_CONTEXT linkedBase = BASE_CONTEXT_FROM_CONTEXT(linked,
92 memcpy(context, linked, contextSize);
94 linkContext->type = ContextTypeLink;
95 linkContext->linked = linkedBase;
97 Context_AddRef(linked, contextSize);
98 TRACE("%p's ref count is %d\n", context, linkContext->ref);
100 TRACE("returning %p\n", context);
104 void Context_AddRef(void *context, size_t contextSize)
106 PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
108 InterlockedIncrement(&baseContext->ref);
109 TRACE("%p's ref count is %d\n", context, baseContext->ref);
110 if (baseContext->type == ContextTypeLink)
112 void *linkedContext = Context_GetLinkedContext(context, contextSize);
113 PBASE_CONTEXT linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
116 /* Add-ref the linked contexts too */
117 while (linkedContext && linkedBase->type == ContextTypeLink)
119 InterlockedIncrement(&linkedBase->ref);
120 TRACE("%p's ref count is %d\n", linkedContext, linkedBase->ref);
121 linkedContext = Context_GetLinkedContext(linkedContext,
124 linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
131 /* It's not a link context, so it wasn't add-ref'ed in the while
132 * loop, so add-ref it here.
134 linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
136 InterlockedIncrement(&linkedBase->ref);
137 TRACE("%p's ref count is %d\n", linkedContext, linkedBase->ref);
142 void *Context_GetExtra(const void *context, size_t contextSize)
144 PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
146 assert(baseContext->type == ContextTypeLink);
147 return (LPBYTE)baseContext + sizeof(LINK_CONTEXT);
150 void *Context_GetLinkedContext(void *context, size_t contextSize)
152 PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
154 assert(baseContext->type == ContextTypeLink);
155 return CONTEXT_FROM_BASE_CONTEXT(((PLINK_CONTEXT)baseContext)->linked,
159 PCONTEXT_PROPERTY_LIST Context_GetProperties(const void *context, size_t contextSize)
161 PBASE_CONTEXT ptr = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
163 while (ptr && ptr->type == ContextTypeLink)
164 ptr = ((PLINK_CONTEXT)ptr)->linked;
165 return (ptr && ptr->type == ContextTypeData) ?
166 ((PDATA_CONTEXT)ptr)->properties : NULL;
169 BOOL Context_Release(void *context, size_t contextSize,
170 ContextFreeFunc dataContextFree)
172 PBASE_CONTEXT base = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
177 ERR("%p's ref count is %d\n", context, base->ref);
180 if (base->type == ContextTypeLink)
182 /* The linked context is of the same type as this, so release
183 * it as well, using the same offset and data free function.
185 ret = Context_Release(CONTEXT_FROM_BASE_CONTEXT(
186 ((PLINK_CONTEXT)base)->linked, contextSize), contextSize,
189 if (InterlockedDecrement(&base->ref) == 0)
191 TRACE("freeing %p\n", context);
192 if (base->type == ContextTypeData)
194 ContextPropertyList_Free(((PDATA_CONTEXT)base)->properties);
195 dataContextFree(context);
197 CryptMemFree(context);
200 TRACE("%p's ref count is %d\n", context, base->ref);
204 void Context_CopyProperties(const void *to, const void *from,
207 PCONTEXT_PROPERTY_LIST toProperties, fromProperties;
209 toProperties = Context_GetProperties(to, contextSize);
210 fromProperties = Context_GetProperties(from, contextSize);
211 assert(toProperties && fromProperties);
212 ContextPropertyList_Copy(toProperties, fromProperties);
217 PCWINE_CONTEXT_INTERFACE contextInterface;
220 struct list contexts;
223 struct ContextList *ContextList_Create(
224 PCWINE_CONTEXT_INTERFACE contextInterface, size_t contextSize)
226 struct ContextList *list = CryptMemAlloc(sizeof(struct ContextList));
230 list->contextInterface = contextInterface;
231 list->contextSize = contextSize;
232 InitializeCriticalSection(&list->cs);
233 list->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ContextList.cs");
234 list_init(&list->contexts);
239 static inline struct list *ContextList_ContextToEntry(const struct ContextList *list,
245 ret = Context_GetExtra(context, list->contextSize);
251 static inline void *ContextList_EntryToContext(const struct ContextList *list,
254 return (LPBYTE)entry - sizeof(LINK_CONTEXT) - list->contextSize;
257 void *ContextList_Add(struct ContextList *list, void *toLink, void *toReplace)
261 TRACE("(%p, %p, %p)\n", list, toLink, toReplace);
263 context = Context_CreateLinkContext(list->contextSize, toLink,
264 sizeof(struct list), TRUE);
267 struct list *entry = ContextList_ContextToEntry(list, context);
269 TRACE("adding %p\n", context);
270 EnterCriticalSection(&list->cs);
273 struct list *existing = ContextList_ContextToEntry(list, toReplace);
275 entry->prev = existing->prev;
276 entry->next = existing->next;
277 entry->prev->next = entry;
278 entry->next->prev = entry;
279 existing->prev = existing->next = existing;
280 list->contextInterface->free(toReplace);
283 list_add_head(&list->contexts, entry);
284 LeaveCriticalSection(&list->cs);
289 void *ContextList_Enum(struct ContextList *list, void *pPrev)
291 struct list *listNext;
294 EnterCriticalSection(&list->cs);
297 struct list *prevEntry = ContextList_ContextToEntry(list, pPrev);
299 listNext = list_next(&list->contexts, prevEntry);
300 list->contextInterface->free(pPrev);
303 listNext = list_next(&list->contexts, &list->contexts);
304 LeaveCriticalSection(&list->cs);
308 ret = ContextList_EntryToContext(list, listNext);
309 list->contextInterface->duplicate(ret);
316 BOOL ContextList_Remove(struct ContextList *list, void *context)
318 struct list *entry = ContextList_ContextToEntry(list, context);
321 EnterCriticalSection(&list->cs);
322 if (!list_empty(entry))
327 LeaveCriticalSection(&list->cs);
333 static void ContextList_Empty(struct ContextList *list)
335 struct list *entry, *next;
337 EnterCriticalSection(&list->cs);
338 LIST_FOR_EACH_SAFE(entry, next, &list->contexts)
340 const void *context = ContextList_EntryToContext(list, entry);
342 TRACE("removing %p\n", context);
344 list->contextInterface->free(context);
346 LeaveCriticalSection(&list->cs);
349 void ContextList_Free(struct ContextList *list)
351 ContextList_Empty(list);
352 list->cs.DebugInfo->Spare[0] = 0;
353 DeleteCriticalSection(&list->cs);