// This routine calculates the next timeout interval for the various
// activity timers. This routine doesn't sort timers, on the assumption
// that a given system will have relatively few inactivity timers.
DWORD
GetNextInactivityTimeout(DWORD dwElapsed)
{
DWORD dwTimeout = INFINITE;
DWORD dwIndex;
PACTIVITY_TIMER pat;
PMLOCK();
for(dwIndex = 0; (pat = gppActivityTimers[dwIndex]) != NULL; dwIndex++) {
DWORD dwTimeLeft = pat->dwTimeLeft;
if(dwTimeLeft != INFINITE) {
// subtract elapsed time
if(dwTimeLeft < dwElapsed) {
dwTimeLeft = 0;
} else {
dwTimeLeft -= dwElapsed;
}
// update the timeout value
if(dwTimeout == INFINITE || dwTimeLeft < dwTimeout) {
dwTimeout = dwTimeLeft;
}
// update the timer
pat->dwTimeLeft = dwTimeLeft;
}
}
PMUNLOCK();
return dwTimeout;
}
// This routine initializes the list of activity timers. It returns ERROR_SUCCESS
// if successful or a Win32 error code otherwise.
DWORD
ActivityTimerInitList(VOID)
{
DWORD dwStatus;
HKEY hk = NULL;
TCHAR szSources[1024];
DWORD dwNumTimers = 0;
PPACTIVITY_TIMER ppatList = NULL;
#ifndef SHIP_BUILD
SETFNAME(_T("ActivityTimerInitList"));
#endif
wsprintf(szSources, _T("%s\\ActivityTimers"), PWRMGR_REG_KEY);
dwStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE, szSources, 0, 0, &hk);
if(dwStatus == ERROR_SUCCESS) {
// figure out how many values are associated with the key
dwStatus = RegQueryInfoKey(hk, NULL, NULL, NULL, &dwNumTimers, NULL, NULL, NULL,
NULL, NULL, NULL, NULL);
} else {
// no timers configured in the registry
dwNumTimers = 0;
dwStatus = ERROR_SUCCESS;
}
// if there are any values, allocate an array to hold them
if(dwStatus == ERROR_SUCCESS) {
ppatList = (PPACTIVITY_TIMER) PmAlloc((dwNumTimers + 1) * sizeof(PACTIVITY_TIMER));
if(ppatList == NULL) {
PMLOGMSG(ZONE_WARN, (_T("%s: couldn't allocate %d timers\r\n"), pszFname,
dwNumTimers));
dwStatus = ERROR_NOT_ENOUGH_MEMORY;
} else {
memset(ppatList, 0, (dwNumTimers + 1) * sizeof(PACTIVITY_TIMER));
ppatList[dwNumTimers] = NULL;
}
}
// read list of timers
if(dwStatus == ERROR_SUCCESS && dwNumTimers != 0) {
DWORD dwIndex = 0;
do {
TCHAR szName[256];
DWORD cbValueName = dim(szName);
dwStatus = RegEnumKeyEx(hk, dwIndex, szName, &cbValueName, NULL,
NULL, NULL, NULL);
if(dwStatus == ERROR_SUCCESS) {
HKEY hkSubKey = NULL;
// open the subkey
dwStatus = RegOpenKeyEx(hk, szName, 0, 0, &hkSubKey);
if(dwStatus == ERROR_SUCCESS) {
DWORD dwSize, dwType, dwTimeout;
LPTSTR pszValueName;
// read the timeout, expressed in seconds
dwSize = sizeof(dwTimeout);
pszValueName = _T("Timeout");
dwStatus = RegQueryValueEx(hkSubKey, pszValueName, NULL, &dwType, (LPBYTE) &dwTimeout,
&dwSize);
if(dwStatus == ERROR_SUCCESS) {
if(dwType != REG_DWORD || dwTimeout > MAXTIMERINTERVAL) {
PMLOGMSG(ZONE_WARN,
(_T("%s: RegQueryValueEx('%s'\'%s') or returned invalid type %d or invalid value %d\r\n"),
pszFname, szName, pszValueName, dwType, dwTimeout));
dwStatus = ERROR_INVALID_DATA;
}
// convert timeout to milliseconds
dwTimeout *= 1000;
} else {
// no timeout in seconds, try milliseconds
dwSize = sizeof(dwTimeout);
pszValueName = _T("TimeoutMs");
dwStatus = RegQueryValueEx(hkSubKey, pszValueName, NULL, &dwType, (LPBYTE) &dwTimeout,
&dwSize);
if(dwStatus != ERROR_SUCCESS || dwType != REG_DWORD || dwTimeout > (MAXTIMERINTERVAL * 1000)) {
PMLOGMSG(ZONE_WARN,
(_T("%s: RegQueryValueEx('%s'\'%s') failed %d (or returned invalid type %d or invalid value %d)\r\n"),
pszFname, szName, pszValueName, dwStatus, dwType, dwTimeout));
dwStatus = ERROR_INVALID_DATA;
}
}
if(dwStatus == ERROR_SUCCESS) {
// get wake sources
dwSize = sizeof(szSources);
pszValueName = _T("WakeSources");
dwStatus = RegQueryValueEx(hkSubKey, pszValueName, NULL, &dwType, (LPBYTE) szSources,
&dwSize);
if(dwStatus != ERROR_SUCCESS) {
// no wake sources
szSources[0] = 0;
szSources[1] = 0;
dwStatus = ERROR_SUCCESS;
} else if(dwType != REG_MULTI_SZ) {
PMLOGMSG(ZONE_WARN, (_T("%s: invalid type %d for '%s'\'%s'\r\n"), pszFname, dwType,
szName, pszValueName));
dwStatus = ERROR_INVALID_DATATYPE;
} else {
szSources[dim(szSources) -1] = szSources[dim(szSources) -2] = 0; // Terminate MultiSZ
}
}
// did we get the parameters?
if(dwStatus == ERROR_SUCCESS) {
ppatList[dwIndex] = ActivityTimerCreate(szName, dwTimeout, szSources);
if(ppatList[dwIndex] == NULL) {
dwStatus = ERROR_NOT_ENOUGH_MEMORY;
}
}
}
// release the registry key
RegCloseKey(hkSubKey);
}
// update the index
dwIndex++;
} while(dwStatus == ERROR_SUCCESS && dwIndex < dwNumTimers);
// did we read all items ok?
if(dwStatus == ERROR_NO_MORE_ITEMS) {
dwStatus = ERROR_SUCCESS;
}
// terminate the list with a NULL
ppatList[dwIndex] = NULL;
}
// did we succeed?
if(dwStatus == ERROR_SUCCESS) {
PMLOCK();
gppActivityTimers = ppatList;
PMUNLOCK();
} else {
DWORD dwIndex;
if(ppatList != NULL) {
for(dwIndex = 0; dwIndex < dwNumTimers; dwIndex++) {
if(ppatList[dwIndex] != NULL) {
ActivityTimerDestroy(ppatList[dwIndex]);
}
}
PmFree(ppatList);
}
}
// release resources
if(hk != NULL) RegCloseKey(hk);
PMLOGMSG(dwStatus != ERROR_SUCCESS && ZONE_WARN,
(_T("%s: returning %d\r\n"), pszFname, dwStatus));
return dwStatus;
}
// this thread handles activity timer events
DWORD WINAPI
ActivityTimersThreadProc(LPVOID lpvParam)
{
DWORD dwStatus, dwNumEvents, dwWaitInterval;
HANDLE hevReady = (HANDLE) lpvParam;
HANDLE hEvents[MAXIMUM_WAIT_OBJECTS];
BOOL fDone = FALSE;
HANDLE hevDummy = NULL;
INT iPriority;
const DWORD cdwTimerBaseIndex = 2;
#ifndef SHIP_BUILD
SETFNAME(_T("ActivityTimersThreadProc"));
#endif
PMLOGMSG(ZONE_INIT, (_T("+%s: thread 0x%08x\r\n"), pszFname, GetCurrentThreadId()));
// set the thread priority
if(!GetPMThreadPriority(_T("TimerPriority256"), &iPriority)) {
iPriority = DEF_ACTIVITY_TIMER_THREAD_PRIORITY;
}
CeSetThreadPriority(GetCurrentThread(), iPriority);
// initialize the list of activity timers
if(ActivityTimerInitList() != ERROR_SUCCESS) {
PMLOGMSG(ZONE_WARN, (_T("%s: ActivityTimerInitList() failed\r\n"), pszFname));
goto done;
}
// create a dummy event that's never signaled
hevDummy = CreateEvent(NULL, FALSE, FALSE, NULL);
if(hevDummy == NULL) {
PMLOGMSG(ZONE_WARN, (_T("%s: Couldn't create dummy event\r\n"), pszFname));
goto done;
}
// set up the list of events
dwNumEvents = 0;
hEvents[dwNumEvents++] = ghevPmShutdown;
hEvents[dwNumEvents++] = ghevTimerResume;
PMLOCK();
if(gppActivityTimers[0] == NULL) {
// no activity timers defined
PmFree(gppActivityTimers);
gppActivityTimers = NULL;
} else {
// copy activity timer events into the event list
while(dwNumEvents < dim(hEvents) && gppActivityTimers[dwNumEvents - cdwTimerBaseIndex] != NULL) {
hEvents[dwNumEvents] = gppActivityTimers[dwNumEvents - cdwTimerBaseIndex]->hevReset;
dwNumEvents++;
}
}
PMUNLOCK();
// we're up and running
SetEvent(hevReady);
// are there actually any timers to wait on?
if(dwNumEvents <= cdwTimerBaseIndex) {
// no timers defined, so we don't need this thread to wait on them.
PMLOGMSG(ZONE_INIT || ZONE_WARN, (_T("%s: no activity timers defined, exiting\r\n"), pszFname));
Sleep(1000); // don't want PM initialization to fail when we exit
goto done;
}
// wait for these events to get signaled
PMLOGMSG(ZONE_TIMERS, (_T("%s: entering wait loop, %d timers total\r\n"),
pszFname, dwNumEvents - cdwTimerBaseIndex));
dwWaitInterval = 0;
while(!fDone) {
DWORD dwTimeout = GetNextInactivityTimeout(dwWaitInterval);
DWORD dwWaitStart = GetTickCount();
PMLOGMSG(ZONE_TIMERS,
(_T("%s: waiting %u (0x%08x) ms for next event, wait interval was %d\r\n"), pszFname,
dwTimeout, dwTimeout, dwWaitInterval));
dwStatus = WaitForMultipleObjects(dwNumEvents, hEvents, FALSE, dwTimeout);
dwWaitInterval = GetTickCount() - dwWaitStart;
// figure out what caused the wakeup
if(dwStatus == (WAIT_OBJECT_0 + 0)) {
PMLOGMSG(ZONE_WARN, (_T("%s: shutdown event set\r\n"), pszFname));
fDone = TRUE;
} else if(dwStatus == (WAIT_OBJECT_0 + 1)) {
DWORD dwIndex;
PACTIVITY_TIMER pat;
// we've resumed, so re-enable all activity timers that can be reset
PMLOGMSG(ZONE_TIMERS, (_T("%s: resume event set\r\n"), pszFname));
PMLOCK();
for(dwIndex = 0; (pat = gppActivityTimers[dwIndex]) != NULL; dwIndex++) {
DWORD dwEventIndex = dwIndex + cdwTimerBaseIndex;
if(hEvents[dwEventIndex] == hevDummy) {
hEvents[dwEventIndex] = pat->hevReset;
}
pat->dwTimeLeft = pat->dwTimeout + dwWaitInterval;
}
PMUNLOCK();
} else if(dwStatus == WAIT_TIMEOUT) {
DWORD dwIndex;
PACTIVITY_TIMER pat;
// figure out which event(s) timed out
PMLOCK();
for(dwIndex = 0; (pat = gppActivityTimers[dwIndex]) != NULL; dwIndex++) {
if(pat->dwTimeLeft <= dwWaitInterval && pat->dwTimeLeft != INFINITE) {
// has the timer really expired?
if(WaitForSingleObject(pat->hevReset, 0) == WAIT_OBJECT_0) {
// The timer was reset while we weren't looking at it, so we'll look
// at it again later. Calculate the new timeout, compensating for the update
// that will occur in GetNextInactivityTimeout().
PMLOGMSG(ZONE_TIMERS, (_T("%s: timer '%s' reset after timeout\r\n"), pszFname,
pat->pszName));
pat->dwTimeLeft = pat->dwTimeout + dwWaitInterval;
pat->dwResetCount++;
} else {
// the timer has really expired, update events appropriately
PMLOGMSG(ZONE_TIMERS, (_T("%s: timer '%s' has expired\r\n"), pszFname,
pat->pszName));
ResetEvent(pat->hevActive);
SetEvent(pat->hevInactive);
// start looking at the reset event for this timer again
hEvents[dwIndex + cdwTimerBaseIndex] = pat->hevReset;
// update counts
pat->dwTimeLeft = INFINITE;
pat->dwExpiredCount++;
}
}
}
PMUNLOCK();
} else if(dwStatus > (WAIT_OBJECT_0 + 0) && dwStatus < (WAIT_OBJECT_0 + dwNumEvents)) {
PACTIVITY_TIMER pat;
DWORD dwEventIndex = dwStatus - WAIT_OBJECT_0;
PMLOCK();
// get a pointer to the timer
pat = gppActivityTimers[dwEventIndex - cdwTimerBaseIndex];
// handle its events
DEBUGCHK(pat != NULL);
if(pat->dwTimeout == 0) {
// we're not using the event, so ignore it
pat->dwTimeLeft = INFINITE;
} else {
PMLOGMSG(ZONE_TIMERS, (_T("%s: timer '%s' reset\r\n"), pszFname, pat->pszName));
// set events appropriately
ResetEvent(pat->hevInactive);
SetEvent(pat->hevActive);
// don't look at this event again until it's about ready to time out
hEvents[dwEventIndex] = hevDummy;
// update time left on the timer, compensating for the update
// that will occur in GetNextInactivityTimeout().
pat->dwTimeLeft = pat->dwTimeout + dwWaitInterval;
}
pat->dwResetCount++;
PMUNLOCK();
} else {
PMLOGMSG(ZONE_WARN, (_T("%s: WaitForMultipleObjects() returned %d, status is %d\r\n"),
pszFname, dwStatus, GetLastError()));
fDone = TRUE;
}
}
done:
// release resources
if(hevDummy != NULL) CloseHandle(hevDummy);
PMLOCK();
if(gppActivityTimers != NULL) {
DWORD dwIndex = 0;
while(gppActivityTimers[dwIndex] != NULL) {
ActivityTimerDestroy(gppActivityTimers[dwIndex]);
dwIndex++;
}
PmFree(gppActivityTimers);
gppActivityTimers = NULL;
}
PMUNLOCK();
PMLOGMSG(ZONE_INIT | ZONE_WARN, (_T("-%s: exiting\r\n"), pszFname));
return 0;
}
EXTERN_C DWORD WINAPI
PlatformSetSystemPowerState (LPCTSTR pszName, BOOL fForce, BOOL fInternal)
{
DWORD dwStatus = ERROR_SUCCESS;
PSYSTEM_POWER_STATE pNewSystemPowerState = NULL;
PDEVICE_POWER_RESTRICTION pNewCeilingDx = NULL;
BOOL fDoTransition = FALSE;
INT iPreSuspendPriority = 0;
static BOOL fFirstCall = TRUE;
SETFNAME (_T ("PlatformSetSystemPowerState"));
// Read system power state variables and construct new lists:
if (gfFileSystemsAvailable)
PmUpdateSystemPowerStatesIfChanged ();
dwStatus = RegReadSystemPowerState (pszName, &pNewSystemPowerState, &pNewCeilingDx);
// Did we get registry information about the new power state?
if (dwStatus == ERROR_SUCCESS)
{
BOOL fSuspendSystem = FALSE;
static BOOL fWantStartupScreen = FALSE;
DWORD dwNewStateFlags = pNewSystemPowerState->dwFlags;
// Assume we will update the system power state:
fDoTransition = TRUE;
// Are we going to suspend the system as a whole?
if ((dwNewStateFlags &
(POWER_STATE_SUSPEND | POWER_STATE_OFF | POWER_STATE_CRITICAL | POWER_STATE_RESET)) != 0)
{
fSuspendSystem = TRUE;
}
// A "critical" suspend might mean we have totally lost battery power and need
// to suspend really quickly. Depending on the platform, OEMs may be able
// to bypass driver notification entirely and rely on xxx_PowerDown() notifications
// to suspend gracefully. Or they may be able to implement a critical suspend
// kernel ioctl. This sample implementation is very generic and simply sets the
// POWER_FORCE flag, which is not used.
if (dwNewStateFlags & (POWER_STATE_CRITICAL | POWER_STATE_OFF | POWER_STATE_RESET))
{
fForce = TRUE;
}
// If everything seems OK, do the set operation:
if (fDoTransition)
{
POWER_BROADCAST_BUFFER pbb;
PDEVICE_LIST pdl;
BOOL fResumeSystem = FALSE;
// Send out system power state change notifications:
pbb.Message = PBT_TRANSITION;
pbb.Flags = pNewSystemPowerState->dwFlags;
pbb.Length = _tcslen (pNewSystemPowerState->pszName) + 1; // Char count not byte count for now
if (pbb.Length > MAX_PATH)
{
// Truncate the system power state name -- note, we actually have MAX_PATH + 1
// characters available.
pbb.Length = MAX_PATH;
}
_tcsncpy_s (pbb.SystemPowerState, _countof (pbb.SystemPowerState),
pNewSystemPowerState->pszName, pbb.Length);
pbb.Length *= sizeof (pbb.SystemPowerState[0]); // Convert to byte count
GenerateNotifications ((PPOWER_BROADCAST) & pbb);
// Is GWES ready?
if (!gfGwesReady)
{
if (WaitForAPIReady (SH_GDI, 0) == WAIT_OBJECT_0)
{
gfGwesReady = TRUE;
}
}
// Are we suspending?
if (fSuspendSystem && gpfnGwesPowerDown != NULL)
{
// Start the process of suspending GWES:
if (gfGwesReady)
{
fWantStartupScreen = gpfnGwesPowerDown ();
}
}
// Update global system state variables:
PMLOCK ();
PSYSTEM_POWER_STATE pOldSystemPowerState = gpSystemPowerState;
PDEVICE_POWER_RESTRICTION pOldCeilingDx = gpCeilingDx;
if (gpSystemPowerState != NULL
&& (gpSystemPowerState->
dwFlags & (POWER_STATE_SUSPEND | POWER_STATE_OFF | POWER_STATE_CRITICAL)) != 0)
{
// We are exiting a suspended state:
fResumeSystem = TRUE;
}
gpSystemPowerState = pNewSystemPowerState;
gpCeilingDx = pNewCeilingDx;
PMUNLOCK ();
// Are we suspending, resuming, or neither?
if (fSuspendSystem)
{
INT iCurrentPriority;
// We're suspending: update all devices other than block devices,
// in case any of them need to access the registry or write files.
PMLOGMSG (ZONE_PLATFORM || ZONE_RESUME,
(_T ("%s: suspending - notifying non-block drivers\r\n"), pszFname));
for (pdl = gpDeviceLists; pdl != NULL; pdl = pdl->pNext)
{
if (*pdl->pGuid != idBlockDevices)
{
UpdateClassDeviceStates (pdl);
}
}
// Notify the kernel that we are about to suspend. This gives the
// kernel an opportunity to clear wake source flags before we initiate
// the suspend process. If we don't do this and a wake source interrupt
// occurs between the time we call PowerOffSystem() and the time
// OEMPowerOff() is invoked, it is hard for the kernel to know whether or
// not to suspend.
PMLOGMSG (ZONE_PLATFORM || ZONE_RESUME,
(_T ("%s: calling KernelIoControl(IOCTL_HAL_PRESUSPEND)\r\n"), pszFname));
KernelIoControl (IOCTL_HAL_PRESUSPEND, NULL, 0, NULL, 0, NULL);
iCurrentPriority = CeGetThreadPriority (GetCurrentThread ());
DEBUGCHK (iCurrentPriority != THREAD_PRIORITY_ERROR_RETURN);
if (iCurrentPriority != THREAD_PRIORITY_ERROR_RETURN)
{
CeSetThreadPriority (GetCurrentThread (), giPreSuspendPriority);
Sleep (0);
CeSetThreadPriority (GetCurrentThread (), iCurrentPriority);
}
// Notify file systems that their block drivers will soon go away.
// After making this call, this thread is the only one that can access
// the file system (including registry and device drivers) without
// blocking. Unfortunately, this API takes and holds the file system
// critical section, so other threads attempting to access the registry
// or files may cause priority inversions. To avoid priority problem
// that may starve the Power Manager, we may raise our own priority to a
// high level. Do this if giSuspendPriority is non-zero.
if (giSuspendPriority != 0)
{
iPreSuspendPriority = CeGetThreadPriority (GetCurrentThread ());
DEBUGCHK (iPreSuspendPriority != THREAD_PRIORITY_ERROR_RETURN);
PMLOGMSG (ZONE_PLATFORM,
(_T
("%s: suspending: raising thread priority for 0x%08x from %d to %d\r\n"),
pszFname, GetCurrentThreadId (), iPreSuspendPriority,
giSuspendPriority));
CeSetThreadPriority (GetCurrentThread (), giSuspendPriority);
}
// Discard code pages from drivers. This is a diagnostic tool to
// forcibly expose paging-related bugs that could cause apparently
// random system crashes or hangs. Optionally, OEMs can disable this
// for production systems to speed up resume times. We have to call
// PageOutMode before FileSys Shutdown. Otherwise, it cause dead lock
// between filesystem and loader.
if (gfPageOutAllModules)
{
ForcePageout ();
}
if (g_pSysRegistryAccess)
g_pSysRegistryAccess->EnterLock ();
gfFileSystemsAvailable = FALSE;
if ((dwNewStateFlags & POWER_STATE_RESET) != 0)
{
// Is this to be a cold boot?
if (_tcscmp (pszName, _T ("coldreboot")) == 0)
{
SetCleanRebootFlag ();
}
}
FileSystemPowerFunction (FSNOTIFY_POWER_OFF);
// Update block device power states:
PMLOGMSG (ZONE_PLATFORM || ZONE_RESUME,
(_T ("%s: suspending - notifying block drivers\r\n"), pszFname));
pdl = GetDeviceListFromClass (&idBlockDevices);
if (pdl != NULL)
{
UpdateClassDeviceStates (pdl);
}
// Handle resets and shutdowns here, after flushing files. Since Windows CE does
// not define a standard mechanism for handling shutdown (via POWER_STATE_OFF),
// OEMs will need to fill in the appropriate code here. Similarly, if an OEM does
// not support IOCTL_HAL_REBOOT, they should not support POWER_STATE_RESET.
if ((dwNewStateFlags & POWER_STATE_RESET) != 0)
{
// Should not return from this call, but if we do just suspend the system:
KernelLibIoControl ((HANDLE) KMOD_OAL, IOCTL_HAL_REBOOT, NULL, 0, NULL, 0,
NULL);
RETAILMSG (TRUE,
(_T
("PM: PlatformSetSystemPowerState: KernelIoControl(IOCTL_HAL_REBOOT) returned!\r\n")));
DEBUGCHK (FALSE); // Break into the debugger.
}
}
else if (fResumeSystem)
{
// We're waking up from a resume -- update block device power states
// so we can access the registry and/or files.
PMLOGMSG (ZONE_PLATFORM || ZONE_RESUME,
(_T ("%s: resuming - notifying block drivers\r\n"), pszFname));
pdl = GetDeviceListFromClass (&idBlockDevices);
if (pdl != NULL)
{
UpdateClassDeviceStates (pdl);
}
// Notify file systems that their block drivers are back.
FileSystemPowerFunction (FSNOTIFY_POWER_ON);
gfFileSystemsAvailable = TRUE;
if (g_pSysRegistryAccess)
g_pSysRegistryAccess->LeaveLock ();
// Update all devices other than block devices:
PMLOGMSG (ZONE_PLATFORM || ZONE_RESUME,
(_T ("%s: resuming - notifying block drivers\r\n"), pszFname));
for (pdl = gpDeviceLists; pdl != NULL; pdl = pdl->pNext)
{
if (*pdl->pGuid != idBlockDevices)
{
UpdateClassDeviceStates (pdl);
}
}
// Tell GWES to wake up:
if (gpfnGwesPowerUp != NULL && gfGwesReady)
{
gpfnGwesPowerUp (fWantStartupScreen);
fWantStartupScreen = FALSE;
}
// Send out resume notification:
pbb.Message = PBT_RESUME;
pbb.Flags = 0;
pbb.Length = 0;
pbb.SystemPowerState[0] = 0;
GenerateNotifications ((PPOWER_BROADCAST) & pbb);
}
else
{
// Update all devices without any particular ordering:
UpdateAllDeviceStates ();
}
// Release the old state information:
SystemPowerStateDestroy (pOldSystemPowerState);
while (pOldCeilingDx != NULL)
{
PDEVICE_POWER_RESTRICTION pdpr = pOldCeilingDx->pNext;
PowerRestrictionDestroy (pOldCeilingDx);
pOldCeilingDx = pdpr;
}
// Are we suspending?
if (fSuspendSystem)
{
// Set a flag to notify the resume thread that this was a controlled suspend.
gfSystemSuspended = TRUE;
PMLOGMSG (ZONE_PLATFORM
|| ZONE_RESUME, (_T ("%s: calling PowerOffSystem()\r\n"), pszFname));
PowerOffSystem (); // Sets a flag in the kernel for the scheduler.
Sleep (0); // Force the scheduler to run.
PMLOGMSG (ZONE_PLATFORM
|| ZONE_RESUME, (_T ("%s: back from PowerOffSystem()\r\n"), pszFname));
// Clear the suspend flag:
gfSystemSuspended = FALSE;
}
}
else
{
// Release the unused new state information:
SystemPowerStateDestroy (pNewSystemPowerState);
while (pNewCeilingDx != NULL)
{
PDEVICE_POWER_RESTRICTION pdpr = pNewCeilingDx->pNext;
PowerRestrictionDestroy (pNewCeilingDx);
pNewCeilingDx = pdpr;
}
}
}
// Restore our priority if we updated it during a suspend transition:
if (giSuspendPriority != 0 && iPreSuspendPriority != 0)
{
PMLOGMSG (ZONE_PLATFORM, (_T ("%s: restoring thread priority to %d\r\n"),
pszFname, iPreSuspendPriority));
CeSetThreadPriority (GetCurrentThread (), iPreSuspendPriority);
}
return dwStatus;
}
