mirror of
https://github.com/reactos/reactos.git
synced 2024-11-03 05:18:55 +00:00
105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/* $Id$
|
|
*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS system libraries
|
|
* FILE: lib/smdll/query.c
|
|
* PURPOSE: Call SM API SM_API_QUERY_INFORMATION (not in NT)
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
|
|
/**********************************************************************
|
|
* NAME EXPORTED
|
|
* SmQueryInformation/5
|
|
*
|
|
* DESCRIPTION
|
|
* Ask the SM to collect some data from its internal data
|
|
* structures and send it back.
|
|
*
|
|
* ARGUMENTS
|
|
* hSmApiPort: handle returned by SmConnectApiPort;
|
|
* SmInformationClass: an SM information class ID:
|
|
* SM_BASIC_INFORMATION: the number of registered subsystems
|
|
* Data: pointer to storage for the information to request;
|
|
* DataLength: length in bytes of the Data buffer; it must be
|
|
* set and must match the SmInformationClass info size;
|
|
* ReturnedDataLength: optional pointer to storage to receive
|
|
* the size of the returnede data.
|
|
*
|
|
* RETURN VALUE
|
|
* STATUS_SUCCESS: OK you get what you asked for;
|
|
* STATUS_INFO_LENGTH_MISMATCH: you set DataLength to 0 or to a
|
|
* value that does not match whet the SmInformationClass
|
|
* requires;
|
|
* STATUS_INVALID_PARAMETER_2: bad information class;
|
|
* A port error.
|
|
*
|
|
*/
|
|
NTSTATUS WINAPI
|
|
SmQueryInformation (IN HANDLE hSmApiPort,
|
|
IN SM_INFORMATION_CLASS SmInformationClass,
|
|
IN OUT PVOID Data,
|
|
IN ULONG DataLength,
|
|
IN OUT PULONG ReturnedDataLength OPTIONAL)
|
|
{
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
SM_PORT_MESSAGE SmReqMsg;
|
|
|
|
|
|
if(0 == DataLength)
|
|
{
|
|
return STATUS_INFO_LENGTH_MISMATCH;
|
|
}
|
|
/* Marshal data in the port message */
|
|
switch (SmInformationClass)
|
|
{
|
|
case SmBasicInformation:
|
|
if(DataLength != sizeof (SM_BASIC_INFORMATION))
|
|
{
|
|
return STATUS_INFO_LENGTH_MISMATCH;
|
|
}
|
|
SmReqMsg.Request.QryInfo.SmInformationClass = SmBasicInformation;
|
|
SmReqMsg.Request.QryInfo.DataLength = DataLength;
|
|
SmReqMsg.Request.QryInfo.BasicInformation.SubSystemCount = 0;
|
|
break;
|
|
case SmSubSystemInformation:
|
|
if(DataLength != sizeof (SM_SUBSYSTEM_INFORMATION))
|
|
{
|
|
return STATUS_INFO_LENGTH_MISMATCH;
|
|
}
|
|
SmReqMsg.Request.QryInfo.SmInformationClass = SmSubSystemInformation;
|
|
SmReqMsg.Request.QryInfo.DataLength = DataLength;
|
|
SmReqMsg.Request.QryInfo.SubSystemInformation.SubSystemId =
|
|
((PSM_SUBSYSTEM_INFORMATION)Data)->SubSystemId;
|
|
break;
|
|
default:
|
|
return STATUS_INVALID_PARAMETER_2;
|
|
}
|
|
/* SM API to invoke */
|
|
SmReqMsg.SmHeader.ApiIndex = SM_API_QUERY_INFORMATION;
|
|
|
|
/* Prepare the port request message */
|
|
SmReqMsg.Header.u2.s2.Type = LPC_NEW_MESSAGE;
|
|
SmReqMsg.Header.u1.s1.DataLength = SM_PORT_DATA_SIZE(SmReqMsg.Request);
|
|
SmReqMsg.Header.u1.s1.TotalLength = SM_PORT_MESSAGE_SIZE;
|
|
Status = NtRequestWaitReplyPort (hSmApiPort, (PPORT_MESSAGE) & SmReqMsg, (PPORT_MESSAGE) & SmReqMsg);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
/* Unmarshal data */
|
|
RtlCopyMemory (Data, & SmReqMsg.Reply.QryInfo.BasicInformation, SmReqMsg.Reply.QryInfo.DataLength);
|
|
/* Use caller provided storage to store data size */
|
|
if(NULL != ReturnedDataLength)
|
|
{
|
|
*ReturnedDataLength = SmReqMsg.Reply.QryInfo.DataLength;
|
|
}
|
|
return SmReqMsg.SmHeader.Status;
|
|
}
|
|
DPRINT("SMLIB: %s failed (Status=0x%08lx)\n", __FUNCTION__, Status);
|
|
return Status;
|
|
}
|
|
/* EOF */
|