71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/******************************************************
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*
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* uDictP.h
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*
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* Private dclartaions involving the user dictionary
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*
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*****************************************************/
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#ifndef H_UDICTP_H
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#define H_UDICTP_H
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#define NO_LINK (-1) // Offset value use when no valid link.
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// User dictionary Flags.
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#define UDF_VALID 0x0001 // End of valid word.
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#define UDF_HAS_TAG 0x0002 // Tag information stored for this node.
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#define UDF_IS_TAG 0x0004 // Tag information, is NOT normal node.
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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// Node in user dictionary.
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typedef struct tagNODE {
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wchar_t wchLabel; // Character label of node
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WORD flags; // Node flags.
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int iDown; // Index of down node.
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union {
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int iRight; // Index of right node.
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const wchar_t *pTag; // Pointer to tag info.
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} uu;
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} NODE;
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typedef enum tagUDICT_IDX {READER=1, WRITER} UDICT_IDX; // Identifer if I am a reader or writer of the XWL
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// The header structure for the user dictionary.
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// June 2001. Implement read/write locking to protect
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// multiple thread access as in the following table:
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// Read Access Write Access
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// Reading Yes No
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// Writing No No
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//
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typedef struct tagUDICT {
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NODE *pNodeAlloc; // Allocated array of nodes.
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int cNodes; // Count of allocated nodes in array.
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int cNodesUsed; // Count of nodes used in array.
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int iFreeList; // Offset of first item in free list.
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int iRoot; // Offset of root of trie.
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BOOL bIsChanged; // True if dictionary has changed since last save
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int iLen; // Amount of space needed to save all the words in the dictionary
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int cReadLock; // Number of read locks on to prevent write updates during a read
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HANDLE hReadLockEvent; // Signal reading of the User dictiionary
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HANDLE hWriteLockMutex; // Signals a writing thread has ownership
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HANDLE hRWevent; // Signals either read or write has ownership
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} UDICT;
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// Synchronization functions
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BOOL UDictInitLocks(UDICT *pDict);
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void UDictDestroyLocks(UDICT *pDict);
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void UDictGetLock(HWL hwl, UDICT_IDX idx );
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void UDictReleaseLock(HWL hwl, UDICT_IDX idx);
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#ifdef __cplusplus
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};
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#endif
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#endif
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