Re: XP DDK

From

Alex Fedotov ()

To

Genadi Zawidowski

Date

2002-04-27T12:03:15Z

Area

SU.WINDOWS.NT.PROG

From: "Alex Fedotov" <me@alexfedotov.com>

Genadi Zawidowski wrote:

> Кто-нибудь знает, как выглядит структура
> KLOCK_QUEUE_HANDLE

//
// Spin Lock
//

// begin_ntndis begin_winnt

typedef ULONG_PTR KSPIN_LOCK;
typedef KSPIN_LOCK *PKSPIN_LOCK;

// end_ntndis end_winnt end_wdm

//
// Define per processor lock queue structure.
//
// N.B. The lock field of the spin lock queue structure contains the address
//      of the associated kernel spin lock, an owner bit, and a lock bit.
Bit
//      0 of the spin lock address is the wait bit and bit 1 is the owner
bit.
//      The use of this field is such that the bits can be set and cleared
//      noninterlocked, however, the back pointer must be preserved.
//
//      The lock wait bit is set when a processor enqueues itself on the
lock
//      queue and it is not the only entry in the queue. The processor will
//      spin on this bit waiting for the lock to be granted.
//
//      The owner bit is set when the processor owns the respective lock.
//
//      The next field of the spin lock queue structure is used to line the
//      queued lock structures together in fifo order. It also can set set
and
//      cleared noninterlocked.
//

#define LOCK_QUEUE_WAIT 1
#define LOCK_QUEUE_OWNER 2

typedef enum _KSPIN_LOCK_QUEUE_NUMBER {
    LockQueueDispatcherLock,
    LockQueueContextSwapLock,
    LockQueuePfnLock,
    LockQueueSystemSpaceLock,
    LockQueueVacbLock,
    LockQueueMasterLock,
    LockQueueNonPagedPoolLock,
    LockQueueIoCancelLock,
    LockQueueWorkQueueLock,
    LockQueueIoVpbLock,
    LockQueueIoDatabaseLock,
    LockQueueIoCompletionLock,
    LockQueueNtfsStructLock,
    LockQueueAfdWorkQueueLock,
    LockQueueBcbLock,
    LockQueueMaximumLock
} KSPIN_LOCK_QUEUE_NUMBER, *PKSPIN_LOCK_QUEUE_NUMBER;

typedef struct _KSPIN_LOCK_QUEUE {
    struct _KSPIN_LOCK_QUEUE * volatile Next;
    PKSPIN_LOCK volatile Lock;
} KSPIN_LOCK_QUEUE, *PKSPIN_LOCK_QUEUE;

typedef struct _KLOCK_QUEUE_HANDLE {
    KSPIN_LOCK_QUEUE LockQueue;
    KIRQL OldIrql;
} KLOCK_QUEUE_HANDLE, *PKLOCK_QUEUE_HANDLE;

-- Alex Fedotov

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