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#ifndef _DLM_H
#define _DLM_H
#define DLM_VERSION 1
#define DLM_VBLK_SZ 32
typedef HANDLE dlm_lockid_t;typedef UCHAR dlm_nodeid_t;typedef CHAR dlm_mode_t;typedef HANDLE dlm_lockval_t;typedef HANDLE dlm_cevent_t;typedef HANDLE dlm_bevent_t;typedef char dlm_vblk[DLM_VBLK_SZ];typedef dlm_vblk *dlm_vblk_t;
typedef enum { DLM_MODE_INVAL = -1, DLM_MODE_NL = 0, DLM_MODE_CR = 1, DLM_MODE_CW = 2, DLM_MODE_PR = 3, DLM_MODE_PW = 4, DLM_MODE_EX = 5}dlm_mode_type_t;
#define DLM_ERROR_SUCCESS 0
#define DLM_ERROR_GRANTED 0
#define DLM_ERROR_QUEUED 1
#define DLM_ERROR_CANCELED 2
#define DLM_ERROR_BADID 11
#define DLM_ERROR_NOMEM 12
#define DLM_ERROR_BADMODE 13
#define DLM_ERROR_NOOP 15
#define DLM_ERROR_WOULDBLOCK 16
#define DLM_ERROR_INVAL 17
#define DLM_ERROR_INVALOP 18
#define DLM_ERROR_LOCKWAIT 19
#define DLM_ERROR_BUSY 20
#define DLM_ERROR_NOTOWNER 21
// List of DLM supported Flags
#define DLM_FLAGS_FASTLOCK 0x0001 // issue convert without fairness
#define DLM_FLAGS_TRYLOCK 0x0002 // if can't get it, don't bother
#define DLM_FLAGS_ASYNC 0x0004 // don't block
#define DLM_FLAGS_EVBLOCK 0x0008 // register callback/event on this lock
#define DLM_FLAGS_VBIO 0x0010 // rw value block
#define DLM_FLAGS_VBIV 0x0020 // invalidate value block
// *** from WDM.H (apps can't be expected to have this defined) ***
typedef ULONG NTSTATUS;typedef struct _IO_STATUS_BLOCK { union { NTSTATUS Status; PVOID Pointer; }; ULONG_PTR Information;} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;typedefVOID(NTAPI *PIO_APC_ROUTINE) ( IN PVOID ApcContext, IN PIO_STATUS_BLOCK IoStatusBlock, IN ULONG Reserved);// *****************************************************************
int InitializeDistributedLockManager(dlm_nodeid_t *nodeid);
int InitializeDistributedLock(dlm_lockid_t *lock, dlm_lockid_t parent, char *name, int sz);
int ConvertDistributedLock(dlm_lockid_t lock, dlm_mode_t mode);
int ConvertDistributedLockEx(dlm_lockid_t lock, dlm_mode_t mode, int flags, dlm_vblk_t vblk, PIO_APC_ROUTINE callback, PVOID arg, HANDLE event, PIO_STATUS_BLOCK iostatus);
int QueueDistributedLockEvent(dlm_lockid_t lock, PIO_APC_ROUTINE callback, PVOID arg, HANDLE event, PIO_STATUS_BLOCK iostatus);int DestroyDistributedLock(dlm_lockid_t lock);
#endif
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