Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-12-28 10:04:49 +00:00
Code Issues Projects Releases Packages Wiki Activity

NtAllocateUuids(): Load and save sequence counter.

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

122
reactos/ntoskrnl/ex/uuid.c
View file

@ -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 * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -52,27 +52,108 @@ ExpInitUuids(VOID)
} }
static BOOLEAN #define VALUE_BUFFER_SIZE 256
ExpLoadUuidSequenceCount(PULONG Sequence)
static NTSTATUS
ExpLoadUuidSequence(PULONG Sequence)
{ {
/* FIXME */ UCHAR ValueBuffer[VALUE_BUFFER_SIZE];
*Sequence = 0x01234567; PKEY_VALUE_PARTIAL_INFORMATION ValueInfo;
return TRUE; 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 static VOID
ExpSaveUuidSequenceCount(ULONG Sequence) ExpGetRandomUuidSequence(PULONG Sequence)
{ {
/* FIXME */ /* FIXME */
} *Sequence = 0x70615243;
static VOID
ExpGetRandomUuidSequenceCount(PULONG Sequence)
{
/* FIXME */
*Sequence = 0x76543210;
} }
@ -98,7 +179,6 @@ ExpCreateUuids(PULARGE_INTEGER Time,
if (Time->QuadPart < UuidLastTime.QuadPart) if (Time->QuadPart < UuidLastTime.QuadPart)
{ {
// *Sequence = (*Sequence + 1) & 0x1fff;
(*Sequence)++; (*Sequence)++;
UuidSequenceChanged = TRUE; UuidSequenceChanged = TRUE;
UuidCount = 0; UuidCount = 0;
@ -138,9 +218,10 @@ NtAllocateUuids(OUT PULARGE_INTEGER Time,
if (!UuidSequenceInitialized) if (!UuidSequenceInitialized)
{ {
if (!ExpLoadUuidSequenceCount(&UuidSequence)) Status = ExpLoadUuidSequence(&UuidSequence);
if (!NT_SUCCESS(Status))
{ {
ExpGetRandomUuidSequenceCount(&UuidSequence); ExpGetRandomUuidSequence(&UuidSequence);
} }
UuidSequenceInitialized = TRUE; UuidSequenceInitialized = TRUE;
@ -158,8 +239,9 @@ NtAllocateUuids(OUT PULARGE_INTEGER Time,
if (UuidSequenceChanged) if (UuidSequenceChanged)
{ {
ExpSaveUuidSequenceCount(UuidSequence); Status = ExpSaveUuidSequence(&UuidSequence);
UuidSequenceChanged = FALSE; if (NT_SUCCESS(Status))
UuidSequenceChanged = FALSE;
} }
ExReleaseFastMutex(&UuidMutex); ExReleaseFastMutex(&UuidMutex);