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sys: ioq

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This commit is contained in:
Bill Zissimopoulos
2015-12-28 11:17:37 -08:00
parent 3d381145e3
commit 72fdea5e78
6 changed files with 81 additions and 116 deletions
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75
src/sys/driver.h
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@ -265,6 +265,40 @@ VOID FspFreeExternal(PVOID Pointer)
ExFreePool(Pointer);
}
/* hash mix */
/* Based on the MurmurHash3 fmix32/fmix64 function:
* See: https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp?r=152#68
*/
static inline
UINT32 FspHashMix32(UINT32 h)
{
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
return h;
}
static inline
UINT64 FspHashMix64(UINT64 k)
{
k ^= k >> 33;
k *= 0xff51afd7ed558ccdULL;
k ^= k >> 33;
k *= 0xc4ceb9fe1a85ec53ULL;
k ^= k >> 33;
return k;
}
static inline
ULONG FspHashMixPointer(PVOID Pointer)
{
#if _WIN64
return (ULONG)FspHashMix64((UINT64)Pointer);
#else
return (ULONG)FspHashMix32((UINT32)Pointer);
#endif
}
/* utility: GUIDs */
NTSTATUS FspCreateGuid(GUID *Guid);
@ -291,38 +325,13 @@ VOID FspInitializeDelayedWorkItem(FSP_DELAYED_WORK_ITEM *DelayedWorkItem,
PWORKER_THREAD_ROUTINE Routine, PVOID Context);
VOID FspQueueDelayedWorkItem(FSP_DELAYED_WORK_ITEM *DelayedWorkItem, LARGE_INTEGER Delay);
/* dictionary */
typedef BOOLEAN FSP_DICT_EQUAL_FUNCTION(PVOID Key1, PVOID Key2);
typedef ULONG FSP_DICT_HASH_FUNCTION(PVOID Key);
typedef struct _FSP_DICT_ENTRY
{
PVOID Key, Value;
struct _FSP_DICT_ENTRY *Next;
} FSP_DICT_ENTRY;
typedef struct _FSP_DICT
{
FSP_DICT_EQUAL_FUNCTION *EqualFunction;
FSP_DICT_HASH_FUNCTION *HashFunction;
FSP_DICT_ENTRY **Buckets;
ULONG BucketCount;
} FSP_DICT;
VOID FspDictInitialize(FSP_DICT *Dict,
FSP_DICT_EQUAL_FUNCTION *EqualFunction, FSP_DICT_HASH_FUNCTION *HashFunction,
FSP_DICT_ENTRY **Buckets, ULONG BucketCount);
FSP_DICT_ENTRY *FspDictGetEntry(FSP_DICT *Dict, PVOID Key);
VOID FspDictSetEntry(FSP_DICT *Dict, FSP_DICT_ENTRY *Entry);
FSP_DICT_ENTRY *FspDictRemoveEntry(FSP_DICT *Dict, PVOID Key);
/* IRP context */
typedef struct
{
IO_CSQ_IRP_CONTEXT IoCsqIrpContext;
ULONGLONG ExpirationTime;
} FSP_IRP_CONTEXT;
#define FspIrpContext(Irp) \
(*(FSP_IRP_CONTEXT **)&(Irp)->Tail.Overlay.DriverContext[0])
#define FspIrpTimestamp(Irp) \
(*(ULONG *)&(Irp)->Tail.Overlay.DriverContext[0])
#define FspIrpDictNext(Irp) \
(*(PIRP *)&(Irp)->Tail.Overlay.DriverContext[1])
#define FspIrpRequest(Irp) \
(*(FSP_FSCTL_TRANSACT_REQ **)&(Irp)->Tail.Overlay.DriverContext[0])
(*(FSP_FSCTL_TRANSACT_REQ **)&(Irp)->Tail.Overlay.DriverContext[2])
/* I/O queue */
#define FspIoqTimeout ((PIRP)1)
@ -333,11 +342,11 @@ typedef struct
KEVENT PendingIrpEvent;
LIST_ENTRY PendingIrpList, ProcessIrpList;
IO_CSQ PendingIoCsq, ProcessIoCsq;
FSP_DICT ProcessIrpDict;
LARGE_INTEGER IrpTimeout;
ULONG IrpTimeout;
ULONG PendingIrpCapacity, PendingIrpCount;
VOID (*CompleteCanceledIrp)(PIRP Irp);
FSP_DICT_ENTRY *ProcessIrpDictBuckets[];
ULONG ProcessIrpBucketCount;
PVOID ProcessIrpBuckets[];
} FSP_IOQ;
NTSTATUS FspIoqCreate(
ULONG IrpCapacity, PLARGE_INTEGER IrpTimeout, VOID (*CompleteCanceledIrp)(PIRP Irp),