178 lines
4.1 KiB
C
178 lines
4.1 KiB
C
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//
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// REGINIT.C
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//
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// Copyright (C) Microsoft Corporation, 1995
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//
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#include "pch.h"
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#ifdef DEBUG
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extern int g_RgDatablockLockCount;
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extern int g_RgKeynodeLockCount;
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extern int g_RgMemoryBlockCount;
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#endif
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#ifdef WANT_DYNKEY_SUPPORT
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#ifdef VXD
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#pragma VMM_IDATA_SEG
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#endif
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const char g_RgNull[] = "";
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#ifdef VXD
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#pragma VMM_PAGEABLE_DATA_SEG
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#endif
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#endif
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#ifdef VXD
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// Set when our post critical init routine is called indicating that it's safe
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// to make disk I/O calls. May also be set early when RegFlushKey gets the
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// magic HKEY_CRITICAL_FLUSH.
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BYTE g_RgPostCriticalInit = FALSE;
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// Set when RegFlushKey gets the magic HKEY_DISABLE_REG. No disk I/O will be
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// allowed after this flag is set.
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BYTE g_RgFileAccessDisabled = FALSE;
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#endif
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LPVOID g_RgWorkBuffer = NULL;
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#ifdef DEBUG
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BOOL g_RgWorkBufferBusy = FALSE;
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#endif
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#ifdef VXD
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#pragma VxD_INIT_CODE_SEG
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#endif
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//
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// VMMRegLibAttach
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//
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// Prepares the registry library for use by allocating any global resources.
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// If ERROR_SUCCESS is returned, then VMMRegLibDetach should be called to
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// release these resources.
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//
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LONG
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REGAPI
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VMMRegLibAttach(
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UINT Flags
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)
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{
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if (IsNullPtr((g_RgWorkBuffer = RgAllocMemory(SIZEOF_WORK_BUFFER))))
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goto MemoryError;
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#ifdef WANT_STATIC_KEYS
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if (!RgAllocKeyHandleStructures())
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goto MemoryError;
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#endif
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RgInitPredefinedKeys();
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#ifdef WANT_DYNKEY_SUPPORT
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// Initialize HKEY_DYN_DATA. If anything fails here, we won't stop the
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// initialize of the entire registry.
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if (RgCreateFileInfoNew(&g_RgDynDataKey.lpFileInfo, g_RgNull,
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CFIN_VERSION20 | CFIN_VOLATILE) == ERROR_SUCCESS)
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RgInitRootKeyFromFileInfo(&g_RgDynDataKey);
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ASSERT(!(g_RgDynDataKey.Flags & KEYF_INVALID));
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#endif
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return ERROR_SUCCESS;
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MemoryError:
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// Release anything that we may have allocated up to this point.
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VMMRegLibDetach();
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TRACE(("VMMRegLibAttach returning ERROR_OUTOFMEMORY\n"));
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return ERROR_OUTOFMEMORY;
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}
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#ifdef VXD
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#pragma VxD_SYSEXIT_CODE_SEG
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#endif
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#ifdef WANT_FULL_MEMORY_CLEANUP
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//
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// RgDetachPredefKey
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//
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// Destroys the memory associated with a predefined key and marks the key
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// invalid.
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//
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VOID
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INTERNAL
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RgDetachPredefKey(
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HKEY hKey
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)
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{
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if (!(hKey-> Flags & KEYF_INVALID)) {
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RgDestroyFileInfo(hKey-> lpFileInfo);
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hKey-> Flags |= KEYF_INVALID;
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}
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}
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#endif
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//
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// VMMRegLibDetach
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//
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// Releases resources allocated by VMMRegLibAttach. This function may be
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// called after VMMRegLibDetach returns an error, so this function and all
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// functions it calls must be aware that their corresponding 'alloc' function
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// was not called.
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//
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VOID
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REGAPI
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VMMRegLibDetach(
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VOID
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)
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{
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RgEnumFileInfos(RgFlushFileInfo);
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#ifdef VXD
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// Reduce the chance that we'll go and try to touch the file again!
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//g_RgFileAccessDisabled = TRUE;
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// Unfortunately, we cannot disable writing to the file in this case
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// because Win95 allowed it, and there is at least one VXD that attempts to write
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// to the registry when called with the Sys_VM_Terminate message.
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// However, it seemed like a good idea since the file system is shutting down.
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#endif
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#ifdef WANT_REGREPLACEKEY
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// Win95 difference: file replacement used to take place on system startup,
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// not system exit. It's much easier to deal with file replacement now
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// since we know somebody called RegReplaceKey and we only have to do the
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// work in one component, instead of multiple copies in io.sys, VMM loader,
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// and VMM.
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RgEnumFileInfos(RgReplaceFileInfo);
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#endif
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#ifdef WANT_FULL_MEMORY_CLEANUP
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//
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// Delete the FILE_INFO of each of these top-level keys will cause all
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// of their hives to be deleted.
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//
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RgDetachPredefKey(&g_RgLocalMachineKey);
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RgDetachPredefKey(&g_RgUsersKey);
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#ifdef WANT_DYNKEY_SUPPORT
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RgDetachPredefKey(&g_RgDynDataKey);
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#endif
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RgFreeKeyHandleStructures();
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if (!IsNullPtr(g_RgWorkBuffer))
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RgFreeMemory(g_RgWorkBuffer);
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#endif
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ASSERT(g_RgDatablockLockCount == 0);
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ASSERT(g_RgKeynodeLockCount == 0);
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#ifdef WANT_FULL_MEMORY_CLEANUP
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ASSERT(g_RgMemoryBlockCount == 0);
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#endif
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}
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