mirror of
https://github.com/reactos/reactos.git
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6afbc8f483
svn path=/branches/reactos-yarotows/; revision=45219
293 lines
8.9 KiB
C
293 lines
8.9 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/ps/notify.c
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* PURPOSE: Process Manager: Callbacks to Registered Clients (Drivers)
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Thomas Weidenmueller (w3seek@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS *******************************************************************/
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BOOLEAN PsImageNotifyEnabled = FALSE;
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ULONG PspThreadNotifyRoutineCount, PspProcessNotifyRoutineCount;
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ULONG PspLoadImageNotifyRoutineCount;
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EX_CALLBACK PspThreadNotifyRoutine[PSP_MAX_CREATE_THREAD_NOTIFY];
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EX_CALLBACK PspProcessNotifyRoutine[PSP_MAX_CREATE_PROCESS_NOTIFY];
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EX_CALLBACK PspLoadImageNotifyRoutine[PSP_MAX_LOAD_IMAGE_NOTIFY];
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PLEGO_NOTIFY_ROUTINE PspLegoNotifyRoutine;
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/* PUBLIC FUNCTIONS **********************************************************/
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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PsSetCreateProcessNotifyRoutine(IN PCREATE_PROCESS_NOTIFY_ROUTINE NotifyRoutine,
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IN BOOLEAN Remove)
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{
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ULONG i;
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PEX_CALLBACK_ROUTINE_BLOCK CallBack;
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PAGED_CODE();
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/* Check if we're removing */
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if (Remove)
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{
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/* Loop all the routines */
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for (i = 0; i < PSP_MAX_CREATE_PROCESS_NOTIFY; i++)
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{
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/* Reference the callback block */
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CallBack = ExReferenceCallBackBlock(&PspProcessNotifyRoutine[i]);
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if (!CallBack) continue;
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/* Check it this is a matching block */
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if (ExGetCallBackBlockRoutine(CallBack) != (PVOID)NotifyRoutine)
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{
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/* It's not, try the next one */
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continue;
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}
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/* It is, clear the current routine */
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if (ExCompareExchangeCallBack(&PspProcessNotifyRoutine[i],
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NULL,
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CallBack))
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{
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/* Decrement the number of routines */
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InterlockedDecrement((PLONG)&PspProcessNotifyRoutineCount);
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/* Dereference the block */
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ExDereferenceCallBackBlock(&PspProcessNotifyRoutine[i],
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CallBack);
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/* Wait for actice callbacks */
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ExWaitForCallBacks(CallBack);
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/* Free the callback and exit */
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ExFreeCallBack (CallBack);
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return STATUS_SUCCESS;
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}
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/* Dereference the block */
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ExDereferenceCallBackBlock(&PspProcessNotifyRoutine[i],
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CallBack);
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}
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/* We didn't find any matching block */
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return STATUS_PROCEDURE_NOT_FOUND;
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}
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else
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{
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/* Allocate a callback */
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CallBack = ExAllocateCallBack((PVOID)NotifyRoutine, NULL);
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if (!CallBack) return STATUS_INSUFFICIENT_RESOURCES;
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/* Loop all callbacks */
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for (i = 0; i < PSP_MAX_CREATE_PROCESS_NOTIFY; i++)
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{
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/* Add this routine if it's an empty slot */
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if (ExCompareExchangeCallBack(&PspProcessNotifyRoutine[i],
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CallBack,
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NULL))
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{
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/* Found and inserted into an empty slot, return */
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InterlockedIncrement((PLONG)&PspProcessNotifyRoutineCount);
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return STATUS_SUCCESS;
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}
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}
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/* We didn't find a free slot, free the callback and fail */
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ExFreeCallBack(CallBack);
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return STATUS_INVALID_PARAMETER;
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}
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}
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/*
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* @implemented
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*/
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ULONG
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NTAPI
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PsSetLegoNotifyRoutine(PVOID LegoNotifyRoutine)
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{
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/* Set the System-Wide Lego Routine */
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PspLegoNotifyRoutine = LegoNotifyRoutine;
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/* Return the location to the Lego Data */
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return FIELD_OFFSET(KTHREAD, LegoData);
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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PsRemoveLoadImageNotifyRoutine(IN PLOAD_IMAGE_NOTIFY_ROUTINE NotifyRoutine)
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{
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ULONG i;
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PEX_CALLBACK_ROUTINE_BLOCK CallBack;
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PAGED_CODE();
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/* Loop all callbacks */
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for (i = 0; i < PSP_MAX_LOAD_IMAGE_NOTIFY; i++)
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{
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/* Reference this slot */
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CallBack = ExReferenceCallBackBlock(&PspLoadImageNotifyRoutine[i]);
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if (CallBack)
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{
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/* Check for a match */
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if (ExGetCallBackBlockRoutine(CallBack) == (PVOID)NotifyRoutine)
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{
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/* Try removing it if it matches */
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if (ExCompareExchangeCallBack(&PspLoadImageNotifyRoutine[i],
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NULL,
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CallBack))
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{
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/* We removed it, now dereference the block */
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InterlockedDecrement((PLONG)&PspLoadImageNotifyRoutineCount);
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ExDereferenceCallBackBlock(&PspLoadImageNotifyRoutine[i],
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CallBack);
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/* Wait for active callbacks */
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ExWaitForCallBacks(CallBack);
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/* Free the callback and return */
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ExFreeCallBack(CallBack);
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return STATUS_SUCCESS;
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}
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}
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/* Dereference the callback */
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ExDereferenceCallBackBlock(&PspLoadImageNotifyRoutine[i], CallBack);
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}
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}
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/* Nothing found to remove */
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return STATUS_PROCEDURE_NOT_FOUND;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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PsSetLoadImageNotifyRoutine(IN PLOAD_IMAGE_NOTIFY_ROUTINE NotifyRoutine)
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{
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ULONG i;
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PEX_CALLBACK_ROUTINE_BLOCK CallBack;
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PAGED_CODE();
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/* Allocate a callback */
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CallBack = ExAllocateCallBack((PVOID)NotifyRoutine, NULL);
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if (!CallBack) return STATUS_INSUFFICIENT_RESOURCES;
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/* Loop callbacks */
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for (i = 0; i < PSP_MAX_LOAD_IMAGE_NOTIFY; i++)
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{
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/* Add this entry if the slot is empty */
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if (ExCompareExchangeCallBack(&PspLoadImageNotifyRoutine[i],
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CallBack,
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NULL))
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{
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/* Return success */
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InterlockedIncrement((PLONG)&PspLoadImageNotifyRoutineCount);
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PsImageNotifyEnabled = TRUE;
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return STATUS_SUCCESS;
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}
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}
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/* No free space found, fail */
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ExFreeCallBack(CallBack);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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PsRemoveCreateThreadNotifyRoutine(IN PCREATE_THREAD_NOTIFY_ROUTINE NotifyRoutine)
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{
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ULONG i;
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PEX_CALLBACK_ROUTINE_BLOCK CallBack;
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PAGED_CODE();
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/* Loop all callbacks */
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for (i = 0; i < PSP_MAX_CREATE_THREAD_NOTIFY; i++)
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{
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/* Reference this slot */
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CallBack = ExReferenceCallBackBlock(&PspThreadNotifyRoutine[i]);
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if (CallBack)
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{
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/* Check for a match */
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if (ExGetCallBackBlockRoutine(CallBack) == (PVOID)NotifyRoutine)
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{
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/* Try removing it if it matches */
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if (ExCompareExchangeCallBack(&PspThreadNotifyRoutine[i],
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NULL,
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CallBack))
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{
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/* We removed it, now dereference the block */
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InterlockedDecrement((PLONG)&PspThreadNotifyRoutineCount);
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ExDereferenceCallBackBlock(&PspThreadNotifyRoutine[i],
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CallBack);
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/* Wait for active callbacks */
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ExWaitForCallBacks(CallBack);
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/* Free the callback and return */
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ExFreeCallBack(CallBack);
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return STATUS_SUCCESS;
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}
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}
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/* Dereference the callback */
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ExDereferenceCallBackBlock(&PspThreadNotifyRoutine[i], CallBack);
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}
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}
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/* Nothing found to remove */
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return STATUS_PROCEDURE_NOT_FOUND;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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PsSetCreateThreadNotifyRoutine(IN PCREATE_THREAD_NOTIFY_ROUTINE NotifyRoutine)
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{
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ULONG i;
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PEX_CALLBACK_ROUTINE_BLOCK CallBack;
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PAGED_CODE();
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/* Allocate a callback */
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CallBack = ExAllocateCallBack((PVOID)NotifyRoutine, NULL);
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if (!CallBack) return STATUS_INSUFFICIENT_RESOURCES;
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/* Loop callbacks */
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for (i = 0; i < PSP_MAX_CREATE_THREAD_NOTIFY; i++)
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{
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/* Add this entry if the slot is empty */
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if (ExCompareExchangeCallBack(&PspThreadNotifyRoutine[i],
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CallBack,
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NULL))
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{
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/* Return success */
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InterlockedIncrement((PLONG)&PspThreadNotifyRoutineCount);
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return STATUS_SUCCESS;
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}
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}
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/* No free space found, fail */
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ExFreeCallBack(CallBack);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* EOF */
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