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sys: device: replace device Resource with GenericTableFastMutex

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This commit is contained in:
Bill Zissimopoulos 2015-12-21 15:19:55 -08:00
parent 5e3fae6a8c
commit 1bb0b6be10
2 changed files with 22 additions and 14 deletions
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32
src/sys/device.c
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@ -24,6 +24,8 @@ static VOID FspFsvolDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject);
static IO_TIMER_ROUTINE FspFsvolDeviceTimerRoutine;
static WORKER_THREAD_ROUTINE FspFsvolDeviceExpirationRoutine;
VOID FspFsvolDeviceLockContext(PDEVICE_OBJECT DeviceObject);
VOID FspFsvolDeviceUnlockContext(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
@ -46,6 +48,8 @@ VOID FspDeviceDeleteAll(VOID);
#pragma alloc_text(PAGE, FspFsvolDeviceInit)
#pragma alloc_text(PAGE, FspFsvolDeviceInitComplete)
#pragma alloc_text(PAGE, FspFsvolDeviceFini)
#pragma alloc_text(PAGE, FspFsvolDeviceLockContext)
#pragma alloc_text(PAGE, FspFsvolDeviceUnlockContext)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupContext)
#pragma alloc_text(PAGE, FspFsvolDeviceInsertContext)
#pragma alloc_text(PAGE, FspFsvolDeviceDeleteContext)
@ -277,10 +281,8 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
ExInitializeWorkItem(&FsvolDeviceExtension->ExpirationWorkItem,
FspFsvolDeviceExpirationRoutine, DeviceObject);
/* initialize our resource */
ExInitializeResourceLite(&FsvolDeviceExtension->Resource);
/* initialize our generic table */
ExInitializeFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
RtlInitializeGenericTableAvl(&FsvolDeviceExtension->GenericTable,
FspFsvolDeviceCompareElement, FspFsvolDeviceAllocateElement, FspFsvolDeviceFreeElement, 0);
@ -338,9 +340,6 @@ static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject)
/* free the spare VPB if we still have it */
if (0 != FsvolDeviceExtension->SwapVpb)
FspFreeExternal(FsvolDeviceExtension->SwapVpb);
/* delete our resource */
ExDeleteResourceLite(&FsvolDeviceExtension->Resource);
}
static VOID FspFsvolDeviceTimerRoutine(PDEVICE_OBJECT DeviceObject, PVOID Context)
@ -394,13 +393,23 @@ static VOID FspFsvolDeviceExpirationRoutine(PVOID Context)
FspDeviceRelease(DeviceObject);
}
VOID FspFsvolDeviceLockContext(PDEVICE_OBJECT DeviceObject)
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ExAcquireFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
}
VOID FspFsvolDeviceUnlockContext(PDEVICE_OBJECT DeviceObject)
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ExReleaseFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
}
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Resource));
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Result;
Result = RtlLookupElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);
@ -414,10 +423,9 @@ PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Resource));
ASSERT(0 != ElementStorage);
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Result, Element = { 0 };
ASSERT(0 != ElementStorage);
Element.Identifier = Identifier;
Element.Context = Context;
@ -437,8 +445,6 @@ VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Resource));
BOOLEAN Deleted;
Deleted = RtlDeleteElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);

4
src/sys/driver.h
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@ -375,9 +375,9 @@ typedef struct
KSPIN_LOCK ExpirationLock;
WORK_QUEUE_ITEM ExpirationWorkItem;
BOOLEAN ExpirationInProgress;
FAST_MUTEX GenericTableFastMutex;
RTL_AVL_TABLE GenericTable;
PVOID GenericTableElementStorage;
ERESOURCE Resource;
} FSP_FSVOL_DEVICE_EXTENSION;
static inline
FSP_DEVICE_EXTENSION *FspDeviceExtension(PDEVICE_OBJECT DeviceObject)
@ -401,6 +401,8 @@ VOID FspDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
VOID FspFsvolDeviceLockContext(PDEVICE_OBJECT DeviceObject);
VOID FspFsvolDeviceUnlockContext(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);