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/*
* Kernel synchronization
*
* Copyright (C) 2018 Zebediah Figura
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "ddk/ntddk.h"
#include "ddk/wdm.h"
#include "wine/debug.h"
#include "ntoskrnl_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ntoskrnl);
enum object_type
{
TYPE_MANUAL_EVENT = 0,
TYPE_AUTO_EVENT = 1,
TYPE_MUTEX = 2,
TYPE_SEMAPHORE = 5,
TYPE_MANUAL_TIMER = 8,
TYPE_AUTO_TIMER = 9,
};
static CRITICAL_SECTION sync_cs;
static CRITICAL_SECTION_DEBUG sync_cs_debug =
{
0, 0, &sync_cs,
{ &sync_cs_debug.ProcessLocksList, &sync_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": sync_cs") }
};
static CRITICAL_SECTION sync_cs = { &sync_cs_debug, -1, 0, 0, 0, 0 };
/***********************************************************************
* KeWaitForMultipleObjects (NTOSKRNL.EXE.@)
*/
NTSTATUS WINAPI KeWaitForMultipleObjects(ULONG count, void *pobjs[],
WAIT_TYPE wait_type, KWAIT_REASON reason, KPROCESSOR_MODE mode,
BOOLEAN alertable, LARGE_INTEGER *timeout, KWAIT_BLOCK *wait_blocks)
{
DISPATCHER_HEADER **objs = (DISPATCHER_HEADER **)pobjs;
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
NTSTATUS ret;
ULONG i;
TRACE("count %u, objs %p, wait_type %u, reason %u, mode %d, alertable %u, timeout %p, wait_blocks %p.\n",
count, objs, wait_type, reason, mode, alertable, timeout, wait_blocks);
/* We co-opt DISPATCHER_HEADER.WaitListHead:
* Blink stores a handle to the synchronization object,
* Flink stores the number of threads currently waiting on this object. */
EnterCriticalSection( &sync_cs );
for (i = 0; i < count; i++)
{
++*((ULONG_PTR *)&objs[i]->WaitListHead.Flink);
if (!objs[i]->WaitListHead.Blink)
{
switch (objs[i]->Type)
{
case TYPE_MANUAL_EVENT:
objs[i]->WaitListHead.Blink = CreateEventW( NULL, TRUE, objs[i]->SignalState, NULL );
break;
case TYPE_AUTO_EVENT:
objs[i]->WaitListHead.Blink = CreateEventW( NULL, FALSE, objs[i]->SignalState, NULL );
break;
case TYPE_MUTEX:
objs[i]->WaitListHead.Blink = CreateMutexW( NULL, FALSE, NULL );
break;
case TYPE_SEMAPHORE:
{
KSEMAPHORE *semaphore = CONTAINING_RECORD(objs[i], KSEMAPHORE, Header);
objs[i]->WaitListHead.Blink = CreateSemaphoreW( NULL,
semaphore->Header.SignalState, semaphore->Limit, NULL );
break;
}
case TYPE_MANUAL_TIMER:
case TYPE_AUTO_TIMER:
break;
}
}
handles[i] = objs[i]->WaitListHead.Blink;
}
LeaveCriticalSection( &sync_cs );
ret = NtWaitForMultipleObjects( count, handles, (wait_type == WaitAny), alertable, timeout );
EnterCriticalSection( &sync_cs );
for (i = 0; i < count; i++)
{
if (ret == i || (!ret && wait_type == WaitAll))
{
switch (objs[i]->Type)
{
case TYPE_AUTO_EVENT:
case TYPE_AUTO_TIMER:
objs[i]->SignalState = FALSE;
break;
case TYPE_MUTEX:
case TYPE_SEMAPHORE:
--objs[i]->SignalState;
break;
}
}
if (!--*((ULONG_PTR *)&objs[i]->WaitListHead.Flink))
{
switch (objs[i]->Type)
{
case TYPE_MANUAL_EVENT:
case TYPE_AUTO_EVENT:
case TYPE_SEMAPHORE:
CloseHandle(objs[i]->WaitListHead.Blink);
objs[i]->WaitListHead.Blink = NULL;
break;
case TYPE_MUTEX:
/* Native will panic if a mutex is destroyed while held, so we
* don't have to worry about leaking the handle here. */
if (objs[i]->SignalState == 1)
{
CloseHandle(objs[i]->WaitListHead.Blink);
objs[i]->WaitListHead.Blink = NULL;
}
break;
}
}
}
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeWaitForSingleObject (NTOSKRNL.EXE.@)
*/
NTSTATUS WINAPI KeWaitForSingleObject( void *obj, KWAIT_REASON reason,
KPROCESSOR_MODE mode, BOOLEAN alertable, LARGE_INTEGER *timeout )
{
return KeWaitForMultipleObjects( 1, &obj, WaitAny, reason, mode, alertable, timeout, NULL );
}
/***********************************************************************
* KeWaitForMutexObject (NTOSKRNL.EXE.@)
*/
NTSTATUS WINAPI KeWaitForMutexObject( PRKMUTEX mutex, KWAIT_REASON reason,
KPROCESSOR_MODE mode, BOOLEAN alertable, LARGE_INTEGER *timeout)
{
return KeWaitForSingleObject( mutex, reason, mode, alertable, timeout );
}
/***********************************************************************
* KeInitializeEvent (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeEvent( PRKEVENT event, EVENT_TYPE type, BOOLEAN state )
{
TRACE("event %p, type %u, state %u.\n", event, type, state);
event->Header.Type = type;
event->Header.SignalState = state;
event->Header.WaitListHead.Blink = NULL;
event->Header.WaitListHead.Flink = NULL;
}
/***********************************************************************
* KeSetEvent (NTOSKRNL.EXE.@)
*/
LONG WINAPI KeSetEvent( PRKEVENT event, KPRIORITY increment, BOOLEAN wait )
{
HANDLE handle;
LONG ret;
TRACE("event %p, increment %d, wait %u.\n", event, increment, wait);
EnterCriticalSection( &sync_cs );
ret = InterlockedExchange( &event->Header.SignalState, TRUE );
if ((handle = event->Header.WaitListHead.Blink))
SetEvent( handle );
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeResetEvent (NTOSKRNL.EXE.@)
*/
LONG WINAPI KeResetEvent( PRKEVENT event )
{
HANDLE handle;
LONG ret;
TRACE("event %p.\n", event);
EnterCriticalSection( &sync_cs );
ret = InterlockedExchange( &event->Header.SignalState, FALSE );
if ((handle = event->Header.WaitListHead.Blink))
ResetEvent( handle );
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeClearEvent (NTOSKRNL.EXE.@)
*/
void WINAPI KeClearEvent( PRKEVENT event )
{
KeResetEvent( event );
}
/***********************************************************************
* KeInitializeSemaphore (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeSemaphore( PRKSEMAPHORE semaphore, LONG count, LONG limit )
{
TRACE("semaphore %p, count %d, limit %d.\n", semaphore, count, limit);
semaphore->Header.Type = TYPE_SEMAPHORE;
semaphore->Header.SignalState = count;
semaphore->Header.WaitListHead.Blink = NULL;
semaphore->Header.WaitListHead.Flink = NULL;
semaphore->Limit = limit;
}
/***********************************************************************
* KeReleaseSemaphore (NTOSKRNL.EXE.@)
*/
LONG WINAPI KeReleaseSemaphore( PRKSEMAPHORE semaphore, KPRIORITY increment,
LONG count, BOOLEAN wait )
{
HANDLE handle;
LONG ret;
TRACE("semaphore %p, increment %d, count %d, wait %u.\n",
semaphore, increment, count, wait);
EnterCriticalSection( &sync_cs );
ret = InterlockedExchangeAdd( &semaphore->Header.SignalState, count );
if ((handle = semaphore->Header.WaitListHead.Blink))
ReleaseSemaphore( handle, count, NULL );
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeInitializeMutex (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeMutex( PRKMUTEX mutex, ULONG level )
{
TRACE("mutex %p, level %u.\n", mutex, level);
mutex->Header.Type = TYPE_MUTEX;
mutex->Header.SignalState = 1;
mutex->Header.WaitListHead.Blink = NULL;
mutex->Header.WaitListHead.Flink = NULL;
}
/***********************************************************************
* KeReleaseMutex (NTOSKRNL.EXE.@)
*/
LONG WINAPI KeReleaseMutex( PRKMUTEX mutex, BOOLEAN wait )
{
LONG ret;
TRACE("mutex %p, wait %u.\n", mutex, wait);
EnterCriticalSection( &sync_cs );
ret = mutex->Header.SignalState++;
if (!ret && !mutex->Header.WaitListHead.Flink)
{
CloseHandle( mutex->Header.WaitListHead.Blink );
mutex->Header.WaitListHead.Blink = NULL;
}
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeInitializeTimerEx (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeTimerEx( KTIMER *timer, TIMER_TYPE type )
{
TRACE("timer %p, type %u.\n", timer, type);
RtlZeroMemory(timer, sizeof(KTIMER));
timer->Header.Type = (type == NotificationTimer) ? TYPE_MANUAL_TIMER : TYPE_AUTO_TIMER;
timer->Header.SignalState = FALSE;
timer->Header.Inserted = FALSE;
timer->Header.WaitListHead.Blink = NULL;
timer->Header.WaitListHead.Flink = NULL;
}
/***********************************************************************
* KeInitializeTimer (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeTimer( KTIMER *timer )
{
KeInitializeTimerEx(timer, NotificationTimer);
}
/***********************************************************************
* KeSetTimerEx (NTOSKRNL.EXE.@)
*/
BOOLEAN WINAPI KeSetTimerEx( KTIMER *timer, LARGE_INTEGER duetime, LONG period, KDPC *dpc )
{
BOOL ret;
TRACE("timer %p, duetime %s, period %d, dpc %p.\n",
timer, wine_dbgstr_longlong(duetime.QuadPart), period, dpc);
if (dpc)
{
FIXME("Unhandled DPC %p.\n", dpc);
return FALSE;
}
EnterCriticalSection( &sync_cs );
ret = timer->Header.Inserted;
timer->Header.Inserted = TRUE;
timer->Header.WaitListHead.Blink = CreateWaitableTimerW( NULL, timer->Header.Type == TYPE_MANUAL_TIMER, NULL );
SetWaitableTimer( timer->Header.WaitListHead.Blink, &duetime, period, NULL, NULL, FALSE );
LeaveCriticalSection( &sync_cs );
return ret;
}
BOOLEAN WINAPI KeCancelTimer( KTIMER *timer )
{
BOOL ret;
TRACE("timer %p.\n", timer);
EnterCriticalSection( &sync_cs );
ret = timer->Header.Inserted;
timer->Header.Inserted = FALSE;
CloseHandle(timer->Header.WaitListHead.Blink);
timer->Header.WaitListHead.Blink = NULL;
LeaveCriticalSection( &sync_cs );
return ret;
}
/***********************************************************************
* KeDelayExecutionThread (NTOSKRNL.EXE.@)
*/
NTSTATUS WINAPI KeDelayExecutionThread( KPROCESSOR_MODE mode, BOOLEAN alertable, LARGE_INTEGER *timeout )
{
TRACE("mode %d, alertable %u, timeout %p.\n", mode, alertable, timeout);
return NtDelayExecution( alertable, timeout );
}
/***********************************************************************
* KeInitializeSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI KeInitializeSpinLock( KSPIN_LOCK *lock )
{
TRACE("lock %p.\n", lock);
*lock = 0;
}
static inline void small_pause(void)
{
#ifdef __x86_64__
__asm__ __volatile__( "rep;nop" : : : "memory" );
#else
__asm__ __volatile__( "" : : : "memory" );
#endif
}
/***********************************************************************
* KeAcquireSpinLockAtDpcLevel (NTOSKRNL.EXE.@)
*/
void WINAPI KeAcquireSpinLockAtDpcLevel( KSPIN_LOCK *lock )
{
TRACE("lock %p.\n", lock);
while (!InterlockedCompareExchangePointer( (void **)lock, (void *)1, (void *)0 ))
small_pause();
}
/***********************************************************************
* KeReleaseSpinLockFromDpcLevel (NTOSKRNL.EXE.@)
*/
void WINAPI KeReleaseSpinLockFromDpcLevel( KSPIN_LOCK *lock )
{
TRACE("lock %p.\n", lock);
InterlockedExchangePointer( (void **)lock, 0 );
}
#define QUEUED_SPINLOCK_OWNED 0x2
/***********************************************************************
* KeAcquireInStackQueuedSpinLockAtDpcLevel (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL2_ENTRYPOINT
DEFINE_FASTCALL2_ENTRYPOINT( KeAcquireInStackQueuedSpinLockAtDpcLevel )
void WINAPI DECLSPEC_HIDDEN __regs_KeAcquireInStackQueuedSpinLockAtDpcLevel( KSPIN_LOCK *lock, KLOCK_QUEUE_HANDLE *queue )
#else
void WINAPI KeAcquireInStackQueuedSpinLockAtDpcLevel( KSPIN_LOCK *lock, KLOCK_QUEUE_HANDLE *queue )
#endif
{
KSPIN_LOCK_QUEUE *tail;
TRACE("lock %p, queue %p.\n", lock, queue);
queue->LockQueue.Next = NULL;
if (!(tail = InterlockedExchangePointer( (void **)lock, &queue->LockQueue )))
queue->LockQueue.Lock = (KSPIN_LOCK *)((ULONG_PTR)lock | QUEUED_SPINLOCK_OWNED);
else
{
queue->LockQueue.Lock = lock;
InterlockedExchangePointer( (void **)&tail->Next, &queue->LockQueue );
while (!((ULONG_PTR)InterlockedCompareExchangePointer( (void **)&queue->LockQueue.Lock, 0, 0 )
& QUEUED_SPINLOCK_OWNED))
{
small_pause();
}
}
}
/***********************************************************************
* KeReleaseInStackQueuedSpinLockFromDpcLevel (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL1_ENTRYPOINT
DEFINE_FASTCALL1_ENTRYPOINT( KeReleaseInStackQueuedSpinLockFromDpcLevel )
void WINAPI DECLSPEC_HIDDEN __regs_KeReleaseInStackQueuedSpinLockFromDpcLevel( KLOCK_QUEUE_HANDLE *queue )
#else
void WINAPI KeReleaseInStackQueuedSpinLockFromDpcLevel( KLOCK_QUEUE_HANDLE *queue )
#endif
{
KSPIN_LOCK *lock = (KSPIN_LOCK *)((ULONG_PTR)queue->LockQueue.Lock & ~QUEUED_SPINLOCK_OWNED);
KSPIN_LOCK_QUEUE *next;
TRACE("lock %p, queue %p.\n", lock, queue);
queue->LockQueue.Lock = NULL;
if (!(next = queue->LockQueue.Next))
{
/* If we are truly the last in the queue, the lock will point to us. */
if (InterlockedCompareExchangePointer( (void **)lock, NULL, &queue->LockQueue ) == queue)
return;
/* Otherwise, someone just queued themselves, but hasn't yet set
* themselves as successor. Spin waiting for them to do so. */
while (!(next = queue->LockQueue.Next))
small_pause();
}
InterlockedExchangePointer( (void **)&next->Lock, (KSPIN_LOCK *)((ULONG_PTR)lock | QUEUED_SPINLOCK_OWNED) );
}
#ifndef __i386__
/***********************************************************************
* KeReleaseSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI KeReleaseSpinLock( KSPIN_LOCK *lock, KIRQL irql )
{
TRACE("lock %p, irql %u.\n", lock, irql);
KeReleaseSpinLockFromDpcLevel( lock );
}
/***********************************************************************
* KeAcquireSpinLockRaiseToDpc (NTOSKRNL.EXE.@)
*/
KIRQL WINAPI KeAcquireSpinLockRaiseToDpc( KSPIN_LOCK *lock )
{
TRACE("lock %p.\n", lock);
KeAcquireSpinLockAtDpcLevel( lock );
return 0;
}
/***********************************************************************
* KeAcquireInStackQueuedSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI KeAcquireInStackQueuedSpinLock( KSPIN_LOCK *lock, KLOCK_QUEUE_HANDLE *queue )
{
TRACE("lock %p, queue %p.\n", lock, queue);
KeAcquireInStackQueuedSpinLockAtDpcLevel( lock, queue );
}
/***********************************************************************
* KeReleaseInStackQueuedSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI KeReleaseInStackQueuedSpinLock( KLOCK_QUEUE_HANDLE *queue )
{
TRACE("queue %p.\n", queue);
KeReleaseInStackQueuedSpinLockFromDpcLevel( queue );
}
#endif
static KSPIN_LOCK cancel_lock;
/***********************************************************************
* IoAcquireCancelSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI IoAcquireCancelSpinLock( KIRQL *irql )
{
TRACE("irql %p.\n", irql);
KeAcquireSpinLock( &cancel_lock, irql );
}
/***********************************************************************
* IoReleaseCancelSpinLock (NTOSKRNL.EXE.@)
*/
void WINAPI IoReleaseCancelSpinLock( KIRQL irql )
{
TRACE("irql %u.\n", irql);
KeReleaseSpinLock( &cancel_lock, irql );
}
#ifdef __i386__
DEFINE_FASTCALL2_ENTRYPOINT( ExfInterlockedRemoveHeadList )
PLIST_ENTRY WINAPI DECLSPEC_HIDDEN __regs_ExfInterlockedRemoveHeadList( LIST_ENTRY *list, KSPIN_LOCK *lock )
{
return ExInterlockedRemoveHeadList( list, lock );
}
#endif
/***********************************************************************
* ExInterlockedRemoveHeadList (NTOSKRNL.EXE.@)
*/
LIST_ENTRY * WINAPI ExInterlockedRemoveHeadList( LIST_ENTRY *list, KSPIN_LOCK *lock )
{
LIST_ENTRY *ret;
KIRQL irql;
TRACE("list %p, lock %p.\n", list, lock);
KeAcquireSpinLock( lock, &irql );
ret = RemoveHeadList( list );
KeReleaseSpinLock( lock, irql );
return ret;
}
#ifndef _WIN64
/***********************************************************************
* InterlockedPopEntrySList (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL1_ENTRYPOINT
DEFINE_FASTCALL1_ENTRYPOINT( NTOSKRNL_InterlockedPopEntrySList )
PSLIST_ENTRY WINAPI DECLSPEC_HIDDEN __regs_NTOSKRNL_InterlockedPopEntrySList( PSLIST_HEADER list )
#else
PSLIST_ENTRY WINAPI NTOSKRNL_InterlockedPopEntrySList( PSLIST_HEADER list )
#endif
{
return RtlInterlockedPopEntrySList( list );
}
/***********************************************************************
* InterlockedPushEntrySList (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL2_ENTRYPOINT
DEFINE_FASTCALL2_ENTRYPOINT( NTOSKRNL_InterlockedPushEntrySList )
PSLIST_ENTRY WINAPI DECLSPEC_HIDDEN __regs_NTOSKRNL_InterlockedPushEntrySList( PSLIST_HEADER list,
PSLIST_ENTRY entry )
#else
PSLIST_ENTRY WINAPI NTOSKRNL_InterlockedPushEntrySList( PSLIST_HEADER list, PSLIST_ENTRY entry )
#endif
{
return RtlInterlockedPushEntrySList( list, entry );
}
#ifdef __i386__
/***********************************************************************
* ExInterlockedPopEntrySList (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL2_ENTRYPOINT
DEFINE_FASTCALL2_ENTRYPOINT( NTOSKRNL_ExInterlockedPopEntrySList )
PSLIST_ENTRY WINAPI __regs_NTOSKRNL_ExInterlockedPopEntrySList( PSLIST_HEADER list, PKSPIN_LOCK lock )
#else
PSLIST_ENTRY WINAPI NTOSKRNL_ExInterlockedPopEntrySList( PSLIST_HEADER list, PKSPIN_LOCK lock )
#endif
{
return RtlInterlockedPopEntrySList( list );
}
/***********************************************************************
* ExInterlockedPushEntrySList (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL3_ENTRYPOINT
DEFINE_FASTCALL3_ENTRYPOINT( NTOSKRNL_ExInterlockedPushEntrySList )
PSLIST_ENTRY WINAPI DECLSPEC_HIDDEN __regs_NTOSKRNL_ExInterlockedPushEntrySList( PSLIST_HEADER list,
PSLIST_ENTRY entry,
PKSPIN_LOCK lock )
#else
PSLIST_ENTRY WINAPI NTOSKRNL_ExInterlockedPushEntrySList( PSLIST_HEADER list, PSLIST_ENTRY entry, PKSPIN_LOCK lock )
#endif
{
return RtlInterlockedPushEntrySList( list, entry );
}
#endif /* __i386__ */
#endif /* _WIN64 */
/***********************************************************************
* ExAcquireFastMutexUnsafe (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL1_ENTRYPOINT
DEFINE_FASTCALL1_ENTRYPOINT(ExAcquireFastMutexUnsafe)
void WINAPI __regs_ExAcquireFastMutexUnsafe( FAST_MUTEX *mutex )
#else
void WINAPI ExAcquireFastMutexUnsafe( FAST_MUTEX *mutex )
#endif
{
LONG count;
TRACE("mutex %p.\n", mutex);
count = InterlockedDecrement( &mutex->Count );
if (count < 0)
KeWaitForSingleObject( &mutex->Event, Executive, KernelMode, FALSE, NULL );
}
/***********************************************************************
* ExReleaseFastMutexUnsafe (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL1_ENTRYPOINT
DEFINE_FASTCALL1_ENTRYPOINT(ExReleaseFastMutexUnsafe)
void WINAPI __regs_ExReleaseFastMutexUnsafe( FAST_MUTEX *mutex )
#else
void WINAPI ExReleaseFastMutexUnsafe( FAST_MUTEX *mutex )
#endif
{
LONG count;
TRACE("mutex %p.\n", mutex);
count = InterlockedIncrement( &mutex->Count );
if (count < 1)
KeSetEvent( &mutex->Event, IO_NO_INCREMENT, FALSE );
}
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