356 lines
10 KiB
C
356 lines
10 KiB
C
/*
|
|
* Copyright 2006 Juan Lang
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
#include <assert.h>
|
|
#include <stdarg.h>
|
|
#include "windef.h"
|
|
#include "winbase.h"
|
|
#include "wincrypt.h"
|
|
#include "wine/debug.h"
|
|
#include "wine/list.h"
|
|
#include "crypt32_private.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(context);
|
|
|
|
typedef enum _ContextType {
|
|
ContextTypeData,
|
|
ContextTypeLink,
|
|
} ContextType;
|
|
|
|
typedef struct _BASE_CONTEXT
|
|
{
|
|
LONG ref;
|
|
ContextType type;
|
|
} BASE_CONTEXT, *PBASE_CONTEXT;
|
|
|
|
typedef struct _DATA_CONTEXT
|
|
{
|
|
LONG ref;
|
|
ContextType type; /* always ContextTypeData */
|
|
PCONTEXT_PROPERTY_LIST properties;
|
|
} DATA_CONTEXT, *PDATA_CONTEXT;
|
|
|
|
typedef struct _LINK_CONTEXT
|
|
{
|
|
LONG ref;
|
|
ContextType type; /* always ContextTypeLink */
|
|
PBASE_CONTEXT linked;
|
|
} LINK_CONTEXT, *PLINK_CONTEXT;
|
|
|
|
#define CONTEXT_FROM_BASE_CONTEXT(p, s) ((LPBYTE)(p) - (s))
|
|
#define BASE_CONTEXT_FROM_CONTEXT(p, s) (PBASE_CONTEXT)((LPBYTE)(p) + (s))
|
|
|
|
void *Context_CreateDataContext(size_t contextSize)
|
|
{
|
|
void *ret = CryptMemAlloc(contextSize + sizeof(DATA_CONTEXT));
|
|
|
|
if (ret)
|
|
{
|
|
PDATA_CONTEXT context = (PDATA_CONTEXT)((LPBYTE)ret + contextSize);
|
|
|
|
context->ref = 1;
|
|
context->type = ContextTypeData;
|
|
context->properties = ContextPropertyList_Create();
|
|
if (!context->properties)
|
|
{
|
|
CryptMemFree(ret);
|
|
ret = NULL;
|
|
}
|
|
}
|
|
TRACE("returning %p\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
void *Context_CreateLinkContext(unsigned int contextSize, void *linked, unsigned int extra,
|
|
BOOL addRef)
|
|
{
|
|
void *context = CryptMemAlloc(contextSize + sizeof(LINK_CONTEXT) + extra);
|
|
|
|
TRACE("(%d, %p, %d)\n", contextSize, linked, extra);
|
|
|
|
if (context)
|
|
{
|
|
PLINK_CONTEXT linkContext = (PLINK_CONTEXT)BASE_CONTEXT_FROM_CONTEXT(
|
|
context, contextSize);
|
|
PBASE_CONTEXT linkedBase = BASE_CONTEXT_FROM_CONTEXT(linked,
|
|
contextSize);
|
|
|
|
memcpy(context, linked, contextSize);
|
|
linkContext->ref = 1;
|
|
linkContext->type = ContextTypeLink;
|
|
linkContext->linked = linkedBase;
|
|
if (addRef)
|
|
Context_AddRef(linked, contextSize);
|
|
TRACE("%p's ref count is %d\n", context, linkContext->ref);
|
|
}
|
|
TRACE("returning %p\n", context);
|
|
return context;
|
|
}
|
|
|
|
void Context_AddRef(void *context, size_t contextSize)
|
|
{
|
|
PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
|
|
|
|
InterlockedIncrement(&baseContext->ref);
|
|
TRACE("%p's ref count is %d\n", context, baseContext->ref);
|
|
if (baseContext->type == ContextTypeLink)
|
|
{
|
|
void *linkedContext = Context_GetLinkedContext(context, contextSize);
|
|
PBASE_CONTEXT linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
|
|
contextSize);
|
|
|
|
/* Add-ref the linked contexts too */
|
|
while (linkedContext && linkedBase->type == ContextTypeLink)
|
|
{
|
|
InterlockedIncrement(&linkedBase->ref);
|
|
TRACE("%p's ref count is %d\n", linkedContext, linkedBase->ref);
|
|
linkedContext = Context_GetLinkedContext(linkedContext,
|
|
contextSize);
|
|
if (linkedContext)
|
|
linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
|
|
contextSize);
|
|
else
|
|
linkedBase = NULL;
|
|
}
|
|
if (linkedContext)
|
|
{
|
|
/* It's not a link context, so it wasn't add-ref'ed in the while
|
|
* loop, so add-ref it here.
|
|
*/
|
|
linkedBase = BASE_CONTEXT_FROM_CONTEXT(linkedContext,
|
|
contextSize);
|
|
InterlockedIncrement(&linkedBase->ref);
|
|
TRACE("%p's ref count is %d\n", linkedContext, linkedBase->ref);
|
|
}
|
|
}
|
|
}
|
|
|
|
void *Context_GetExtra(const void *context, size_t contextSize)
|
|
{
|
|
PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
|
|
|
|
assert(baseContext->type == ContextTypeLink);
|
|
return (LPBYTE)baseContext + sizeof(LINK_CONTEXT);
|
|
}
|
|
|
|
void *Context_GetLinkedContext(void *context, size_t contextSize)
|
|
{
|
|
PBASE_CONTEXT baseContext = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
|
|
|
|
assert(baseContext->type == ContextTypeLink);
|
|
return CONTEXT_FROM_BASE_CONTEXT(((PLINK_CONTEXT)baseContext)->linked,
|
|
contextSize);
|
|
}
|
|
|
|
PCONTEXT_PROPERTY_LIST Context_GetProperties(const void *context, size_t contextSize)
|
|
{
|
|
PBASE_CONTEXT ptr = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
|
|
|
|
while (ptr && ptr->type == ContextTypeLink)
|
|
ptr = ((PLINK_CONTEXT)ptr)->linked;
|
|
return (ptr && ptr->type == ContextTypeData) ?
|
|
((PDATA_CONTEXT)ptr)->properties : NULL;
|
|
}
|
|
|
|
BOOL Context_Release(void *context, size_t contextSize,
|
|
ContextFreeFunc dataContextFree)
|
|
{
|
|
PBASE_CONTEXT base = BASE_CONTEXT_FROM_CONTEXT(context, contextSize);
|
|
BOOL ret = TRUE;
|
|
|
|
if (base->ref <= 0)
|
|
{
|
|
ERR("%p's ref count is %d\n", context, base->ref);
|
|
return FALSE;
|
|
}
|
|
if (base->type == ContextTypeLink)
|
|
{
|
|
/* The linked context is of the same type as this, so release
|
|
* it as well, using the same offset and data free function.
|
|
*/
|
|
ret = Context_Release(CONTEXT_FROM_BASE_CONTEXT(
|
|
((PLINK_CONTEXT)base)->linked, contextSize), contextSize,
|
|
dataContextFree);
|
|
}
|
|
if (InterlockedDecrement(&base->ref) == 0)
|
|
{
|
|
TRACE("freeing %p\n", context);
|
|
if (base->type == ContextTypeData)
|
|
{
|
|
ContextPropertyList_Free(((PDATA_CONTEXT)base)->properties);
|
|
dataContextFree(context);
|
|
}
|
|
CryptMemFree(context);
|
|
}
|
|
else
|
|
TRACE("%p's ref count is %d\n", context, base->ref);
|
|
return ret;
|
|
}
|
|
|
|
void Context_CopyProperties(const void *to, const void *from,
|
|
size_t contextSize)
|
|
{
|
|
PCONTEXT_PROPERTY_LIST toProperties, fromProperties;
|
|
|
|
toProperties = Context_GetProperties(to, contextSize);
|
|
fromProperties = Context_GetProperties(from, contextSize);
|
|
assert(toProperties && fromProperties);
|
|
ContextPropertyList_Copy(toProperties, fromProperties);
|
|
}
|
|
|
|
struct ContextList
|
|
{
|
|
PCWINE_CONTEXT_INTERFACE contextInterface;
|
|
size_t contextSize;
|
|
CRITICAL_SECTION cs;
|
|
struct list contexts;
|
|
};
|
|
|
|
struct ContextList *ContextList_Create(
|
|
PCWINE_CONTEXT_INTERFACE contextInterface, size_t contextSize)
|
|
{
|
|
struct ContextList *list = CryptMemAlloc(sizeof(struct ContextList));
|
|
|
|
if (list)
|
|
{
|
|
list->contextInterface = contextInterface;
|
|
list->contextSize = contextSize;
|
|
InitializeCriticalSection(&list->cs);
|
|
list->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ContextList.cs");
|
|
list_init(&list->contexts);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
static inline struct list *ContextList_ContextToEntry(const struct ContextList *list,
|
|
const void *context)
|
|
{
|
|
struct list *ret;
|
|
|
|
if (context)
|
|
ret = Context_GetExtra(context, list->contextSize);
|
|
else
|
|
ret = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static inline void *ContextList_EntryToContext(const struct ContextList *list,
|
|
struct list *entry)
|
|
{
|
|
return (LPBYTE)entry - sizeof(LINK_CONTEXT) - list->contextSize;
|
|
}
|
|
|
|
void *ContextList_Add(struct ContextList *list, void *toLink, void *toReplace)
|
|
{
|
|
void *context;
|
|
|
|
TRACE("(%p, %p, %p)\n", list, toLink, toReplace);
|
|
|
|
context = Context_CreateLinkContext(list->contextSize, toLink,
|
|
sizeof(struct list), TRUE);
|
|
if (context)
|
|
{
|
|
struct list *entry = ContextList_ContextToEntry(list, context);
|
|
|
|
TRACE("adding %p\n", context);
|
|
EnterCriticalSection(&list->cs);
|
|
if (toReplace)
|
|
{
|
|
struct list *existing = ContextList_ContextToEntry(list, toReplace);
|
|
|
|
entry->prev = existing->prev;
|
|
entry->next = existing->next;
|
|
entry->prev->next = entry;
|
|
entry->next->prev = entry;
|
|
existing->prev = existing->next = existing;
|
|
list->contextInterface->free(toReplace);
|
|
}
|
|
else
|
|
list_add_head(&list->contexts, entry);
|
|
LeaveCriticalSection(&list->cs);
|
|
}
|
|
return context;
|
|
}
|
|
|
|
void *ContextList_Enum(struct ContextList *list, void *pPrev)
|
|
{
|
|
struct list *listNext;
|
|
void *ret;
|
|
|
|
EnterCriticalSection(&list->cs);
|
|
if (pPrev)
|
|
{
|
|
struct list *prevEntry = ContextList_ContextToEntry(list, pPrev);
|
|
|
|
listNext = list_next(&list->contexts, prevEntry);
|
|
list->contextInterface->free(pPrev);
|
|
}
|
|
else
|
|
listNext = list_next(&list->contexts, &list->contexts);
|
|
LeaveCriticalSection(&list->cs);
|
|
|
|
if (listNext)
|
|
{
|
|
ret = ContextList_EntryToContext(list, listNext);
|
|
list->contextInterface->duplicate(ret);
|
|
}
|
|
else
|
|
ret = NULL;
|
|
return ret;
|
|
}
|
|
|
|
BOOL ContextList_Remove(struct ContextList *list, void *context)
|
|
{
|
|
struct list *entry = ContextList_ContextToEntry(list, context);
|
|
BOOL inList = FALSE;
|
|
|
|
EnterCriticalSection(&list->cs);
|
|
if (!list_empty(entry))
|
|
{
|
|
list_remove(entry);
|
|
inList = TRUE;
|
|
}
|
|
LeaveCriticalSection(&list->cs);
|
|
if (inList)
|
|
list_init(entry);
|
|
return inList;
|
|
}
|
|
|
|
static void ContextList_Empty(struct ContextList *list)
|
|
{
|
|
struct list *entry, *next;
|
|
|
|
EnterCriticalSection(&list->cs);
|
|
LIST_FOR_EACH_SAFE(entry, next, &list->contexts)
|
|
{
|
|
const void *context = ContextList_EntryToContext(list, entry);
|
|
|
|
TRACE("removing %p\n", context);
|
|
list_remove(entry);
|
|
list->contextInterface->free(context);
|
|
}
|
|
LeaveCriticalSection(&list->cs);
|
|
}
|
|
|
|
void ContextList_Free(struct ContextList *list)
|
|
{
|
|
ContextList_Empty(list);
|
|
list->cs.DebugInfo->Spare[0] = 0;
|
|
DeleteCriticalSection(&list->cs);
|
|
CryptMemFree(list);
|
|
}
|