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NtAllocateUuids(): Load and save sequence counter.

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svn path=/trunk/; revision=12223
This commit is contained in:
Eric Kohl 2004-12-19 12:52:42 +00:00
parent 1d48593faa
commit e84c9310a5
1 changed files with 102 additions and 20 deletions
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122
reactos/ntoskrnl/ex/uuid.c
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@ -1,4 +1,4 @@
/* $Id: uuid.c,v 1.2 2004/12/18 13:27:58 ekohl Exp $
/* $Id: uuid.c,v 1.3 2004/12/19 12:52:42 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -52,27 +52,108 @@ ExpInitUuids(VOID)
}
static BOOLEAN
ExpLoadUuidSequenceCount(PULONG Sequence)
#define VALUE_BUFFER_SIZE 256
static NTSTATUS
ExpLoadUuidSequence(PULONG Sequence)
{
/* FIXME */
*Sequence = 0x01234567;
return TRUE;
UCHAR ValueBuffer[VALUE_BUFFER_SIZE];
PKEY_VALUE_PARTIAL_INFORMATION ValueInfo;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING Name;
HANDLE KeyHandle;
ULONG ValueLength;
NTSTATUS Status;
RtlInitUnicodeString(&Name,
L"\\Registry\\Machine\\Software\\Microsoft\\Rpc");
InitializeObjectAttributes(&ObjectAttributes,
&Name,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = NtOpenKey(&KeyHandle,
KEY_QUERY_VALUE,
&ObjectAttributes);
if (!NT_SUCCESS(Status))
{
DPRINT("NtOpenKey() failed (Status %lx)\n", Status);
return Status;
}
RtlInitUnicodeString(&Name,
L"UuidSequenceNumber");
ValueInfo = (PKEY_VALUE_PARTIAL_INFORMATION)ValueBuffer;
Status = NtQueryValueKey(KeyHandle,
&Name,
KeyValuePartialInformation,
ValueBuffer,
VALUE_BUFFER_SIZE,
&ValueLength);
NtClose(KeyHandle);
if (!NT_SUCCESS(Status))
{
DPRINT("NtQueryValueKey() failed (Status %lx)\n", Status);
return Status;
}
*Sequence = *((PULONG)ValueInfo->Data);
DPRINT("Loaded sequence %lx\n", *Sequence);
return STATUS_SUCCESS;
}
#undef VALUE_BUFFER_SIZE
static NTSTATUS
ExpSaveUuidSequence(PULONG Sequence)
{
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING Name;
HANDLE KeyHandle;
NTSTATUS Status;
RtlInitUnicodeString(&Name,
L"\\Registry\\Machine\\Software\\Microsoft\\Rpc");
InitializeObjectAttributes(&ObjectAttributes,
&Name,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = NtOpenKey(&KeyHandle,
KEY_SET_VALUE,
&ObjectAttributes);
if (!NT_SUCCESS(Status))
{
DPRINT("NtOpenKey() failed (Status %lx)\n", Status);
return Status;
}
RtlInitUnicodeString(&Name,
L"UuidSequenceNumber");
Status = NtSetValueKey(KeyHandle,
&Name,
0,
REG_DWORD,
Sequence,
sizeof(ULONG));
NtClose(KeyHandle);
if (!NT_SUCCESS(Status))
{
DPRINT("NtSetValueKey() failed (Status %lx)\n", Status);
}
return Status;
}
static VOID
ExpSaveUuidSequenceCount(ULONG Sequence)
ExpGetRandomUuidSequence(PULONG Sequence)
{
/* FIXME */
}
static VOID
ExpGetRandomUuidSequenceCount(PULONG Sequence)
{
/* FIXME */
*Sequence = 0x76543210;
*Sequence = 0x70615243;
}
@ -98,7 +179,6 @@ ExpCreateUuids(PULARGE_INTEGER Time,
if (Time->QuadPart < UuidLastTime.QuadPart)
{
// *Sequence = (*Sequence + 1) & 0x1fff;
(*Sequence)++;
UuidSequenceChanged = TRUE;
UuidCount = 0;
@ -138,9 +218,10 @@ NtAllocateUuids(OUT PULARGE_INTEGER Time,
if (!UuidSequenceInitialized)
{
if (!ExpLoadUuidSequenceCount(&UuidSequence))
Status = ExpLoadUuidSequence(&UuidSequence);
if (!NT_SUCCESS(Status))
{
ExpGetRandomUuidSequenceCount(&UuidSequence);
ExpGetRandomUuidSequence(&UuidSequence);
}
UuidSequenceInitialized = TRUE;
@ -158,8 +239,9 @@ NtAllocateUuids(OUT PULARGE_INTEGER Time,
if (UuidSequenceChanged)
{
ExpSaveUuidSequenceCount(UuidSequence);
UuidSequenceChanged = FALSE;
Status = ExpSaveUuidSequence(&UuidSequence);
if (NT_SUCCESS(Status))
UuidSequenceChanged = FALSE;
}
ExReleaseFastMutex(&UuidMutex);