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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
pscid.c
Abstract:
This module implements the Client ID related services.
Author:
Mark Lucovsky (markl) 25-Apr-1989
Jim Kelly (JimK) 2-August-1990
Revision History:
--*/
#include "psp.h"
NTSTATUS
PsLookupProcessThreadByCid(
IN PCLIENT_ID Cid,
OUT PEPROCESS *Process OPTIONAL,
OUT PETHREAD *Thread
)
/*++
Routine Description:
This function accepts The Client ID of a thread, and returns a
referenced pointer to the thread, and possibly a referenced pointer
to the process.
Arguments:
Cid - Specifies the Client ID of the thread.
Process - If specified, returns a referenced pointer to the process
specified in the Cid.
Thread - Returns a referenced pointer to the thread specified in the
Cid.
Return Value:
STATUS_SUCCESS - A process and thread were located based on the contents
of the Cid.
STATUS_INVALID_CID - The specified Cid is invalid.
--*/
{
PHANDLE_ENTRY CidEntry;
PETHREAD lThread;
NTSTATUS Status;
CidEntry = ExMapHandleToPointer(PspCidTable, Cid->UniqueThread, TRUE);
Status = STATUS_INVALID_CID;
if (CidEntry != NULL) {
lThread = (PETHREAD)CidEntry->Object;
if ((lThread != (PETHREAD)PSP_INVALID_ID) &&
(lThread->Cid.UniqueProcess == Cid->UniqueProcess)) {
if (ARGUMENT_PRESENT(Process)) {
*Process = THREAD_TO_PROCESS(lThread);
ObReferenceObject(*Process);
}
ObReferenceObject(lThread);
*Thread = lThread;
Status = STATUS_SUCCESS;
}
ExUnlockHandleTableShared(PspCidTable);
}
return Status;
}
NTSTATUS
PsLookupProcessByProcessId(
IN HANDLE ProcessId,
OUT PEPROCESS *Process
)
/*++
Routine Description:
This function accepts the process id of a process and returns a
referenced pointer to the process.
Arguments:
ProcessId - Specifies the Process ID of the process.
Process - Returns a referenced pointer to the process specified by the
process id.
Return Value:
STATUS_SUCCESS - A process was located based on the contents of
the process id.
STATUS_INVALID_PARAMETER - The process was not found.
--*/
{
PHANDLE_ENTRY CidEntry;
PEPROCESS lProcess;
NTSTATUS Status;
CidEntry = ExMapHandleToPointer(PspCidTable, ProcessId, TRUE);
Status = STATUS_INVALID_PARAMETER;
if (CidEntry != NULL) {
lProcess = (PEPROCESS)CidEntry->Object;
if (lProcess != (PEPROCESS)PSP_INVALID_ID) {
ObReferenceObject(lProcess);
*Process = lProcess;
Status = STATUS_SUCCESS;
}
ExUnlockHandleTableShared(PspCidTable);
}
return Status;
}
NTSTATUS
PsLookupThreadByThreadId(
IN HANDLE ThreadId,
OUT PETHREAD *Thread
)
/*++
Routine Description:
This function accepts the thread id of a thread and returns a
referenced pointer to the thread.
Arguments:
ThreadId - Specifies the Thread ID of the thread.
Thread - Returns a referenced pointer to the thread specified by the
thread id.
Return Value:
STATUS_SUCCESS - A thread was located based on the contents of
the thread id.
STATUS_INVALID_PARAMETER - The thread was not found.
--*/
{
PHANDLE_ENTRY CidEntry;
PETHREAD lThread;
NTSTATUS Status;
CidEntry = ExMapHandleToPointer(PspCidTable, ThreadId, TRUE);
Status = STATUS_INVALID_PARAMETER;
if (CidEntry != NULL) {
lThread = (PETHREAD)CidEntry->Object;
if (lThread != (PETHREAD)PSP_INVALID_ID) {
ObReferenceObject(lThread);
*Thread = lThread;
Status = STATUS_SUCCESS;
}
ExUnlockHandleTableShared(PspCidTable);
}
return Status;
}
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