93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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// FILE
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//
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// ntcache.h
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//
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// SYNOPSIS
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//
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// Declares the class NTCache.
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//
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// MODIFICATION HISTORY
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//
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// 05/11/1998 Original version.
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// 03/12/1999 Improve locking granularity.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _NTCACHE_H_
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#define _NTCACHE_H_
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#if _MSC_VER >= 1000
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#pragma once
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#endif
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#include <hashtbl.h>
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#include <iasutil.h>
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#include <ntdomain.h>
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///////////////////////////////////////////////////////////////////////////////
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//
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// CLASS
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//
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// NTCache
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//
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// DESCRIPTION
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//
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// This class maintains a cache of NTDomain objects indexed by domain name.
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//
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///////////////////////////////////////////////////////////////////////////////
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class NTCache
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: Guardable, NonCopyable
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{
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public:
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~NTCache() throw ();
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// Flushes the cache.
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void clear() throw ();
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// Returns a connection to the specified domain. The client is responsible
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// for releasing the connection when done.
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DWORD getConnection(PCWSTR domainName, LDAPConnection** cxn) throw ();
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// Either retrieves an existing NTDomain object or creates a new one.
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// This method does not actually validate that the domain exists, so it
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// only fails when unable to allocate memory. The client is responsible
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// for releasing the domain when done.
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DWORD getDomain(PCWSTR domainName, NTDomain** domain) throw ();
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// Returns the mode of the specified domain.
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NTDomain::Mode getMode(PCWSTR domainName) throw ();
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protected:
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// Removes all expired domains from the cache.
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void evict() throw ();
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typedef PCWSTR Key;
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typedef NTDomain* Value;
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// Hash a domain object.
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struct Hasher {
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ULONG operator()(Key key) const throw ()
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{ return hash_util::hash(key); }
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};
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// Extract the key (i.e., domainName) from a domain object.
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struct Extractor {
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Key operator()(const Value domain) const throw ()
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{ return domain->getDomainName(); }
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};
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// Test two domain objects for equality.
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struct KeyMatch {
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bool operator()(Key key1, Key key2) const throw ()
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{ return wcscmp(key1, key2) == 0; }
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};
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typedef hash_table<Key, Hasher, Value, Extractor, KeyMatch> DomainTable;
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DomainTable cache;
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};
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#endif // _NTCACHE_H_
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