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106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
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/*
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* PROJECT: ReactOS Win32k subsystem
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Power management of the Win32 kernel-mode subsystem
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* COPYRIGHT: Copyright 2024 George Bișoc <george.bisoc@reactos.org>
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*/
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#pragma once
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//
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// Power Callout type enumeration
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//
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typedef enum tagPOWER_CALLOUT_TYPE
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{
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POWER_CALLOUT_EVENT = 0,
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POWER_CALLOUT_STATE
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} POWER_CALLOUT_TYPE;
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//
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// Power Callout structure
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//
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typedef struct tagWIN32POWERCALLOUT
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{
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/* Links the power callout with the global queue list */
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LIST_ENTRY Link;
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/*
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* Set to POWER_CALLOUT_STATE if the upcoming power callout is a power state
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* (IntHandlePowerState does that), POWER_CALLOUT_EVENT otherwise
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*/
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POWER_CALLOUT_TYPE Type;
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/* The captured Win32 power event parameters (the params are set to none if Type == POWER_STATE) */
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WIN32_POWEREVENT_PARAMETERS Params;
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} WIN32POWERCALLOUT, *PWIN32POWERCALLOUT;
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//
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// Ensures the power callout mutex lock is acquired
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//
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#define ASSERT_POWER_CALLOUT_LOCK_ACQUIRED() \
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ASSERT(gpPowerCalloutMutexOwnerThread == KeGetCurrentThread())
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//
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// Power Manager data
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//
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extern LIST_ENTRY gPowerCalloutsQueueList;
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extern PFAST_MUTEX gpPowerCalloutMutexLock;
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extern PKEVENT gpPowerRequestCalloutEvent;
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extern PKTHREAD gpPowerCalloutMutexOwnerThread;
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//
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// Function prototypes
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//
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NTSTATUS
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NTAPI
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IntInitWin32PowerManagement(
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_In_ HANDLE hPowerRequestEvent);
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NTSTATUS
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NTAPI
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IntWin32PowerManagementCleanup(VOID);
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NTSTATUS
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NTAPI
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IntHandlePowerEvent(
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_In_ PWIN32_POWEREVENT_PARAMETERS pWin32PwrEventParams);
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NTSTATUS
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NTAPI
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IntHandlePowerState(
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_In_ PWIN32_POWERSTATE_PARAMETERS pWin32PwrStateParams);
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//
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// Power Callout locking mechanism
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//
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FORCEINLINE
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VOID
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IntAcquirePowerCalloutLock(VOID)
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{
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KeEnterCriticalRegion();
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ExAcquireFastMutexUnsafe(gpPowerCalloutMutexLock);
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gpPowerCalloutMutexOwnerThread = KeGetCurrentThread();
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}
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FORCEINLINE
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VOID
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IntReleasePowerCalloutLock(VOID)
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{
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ExReleaseFastMutexUnsafe(gpPowerCalloutMutexLock);
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gpPowerCalloutMutexOwnerThread = NULL;
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KeLeaveCriticalRegion();
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}
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//
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// Checks if the following thread is a Win32 thread
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//
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FORCEINLINE
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BOOL
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IntIsThreadWin32Thread(
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_In_ PETHREAD Thread)
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{
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return (Thread->Tcb.Win32Thread != NULL) ? TRUE : FALSE;
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}
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/* EOF */
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