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Diffstat (limited to 'src/vm/umthunkhash.h')
| -rw-r--r-- | src/vm/umthunkhash.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/vm/umthunkhash.h b/src/vm/umthunkhash.h new file mode 100644 index 0000000000..343c55e344 --- /dev/null +++ b/src/vm/umthunkhash.h @@ -0,0 +1,87 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. +// +// File: umthunkhash.h +// + +// + + +#ifndef UMTHUNKHASH_H_ +#define UMTHUNKHASH_H_ +#include "dllimportcallback.h" + +#ifdef FEATURE_MIXEDMODE // IJW +// +// A hashtable for u->m thunks not represented in the fixup tables. +// +class UMThunkHash : public CClosedHashBase { + private: + //---------------------------------------------------- + // Hash key for CClosedHashBase + //---------------------------------------------------- + struct UTHKey { + LPVOID m_pTarget; + PCCOR_SIGNATURE m_pSig; + DWORD m_cSig; + }; + + //---------------------------------------------------- + // Hash entry for CClosedHashBase + //---------------------------------------------------- + struct UTHEntry { + UTHKey m_key; + ELEMENTSTATUS m_status; + UMEntryThunk *m_pUMEntryThunk; + UMThunkMarshInfo m_UMThunkMarshInfo; + }; + + public: + UMThunkHash(Module *pModule, AppDomain *pDomain); + ~UMThunkHash(); + LPVOID GetUMThunk(LPVOID pTarget, PCCOR_SIGNATURE pSig, DWORD cSig); + // *** OVERRIDES FOR CClosedHashBase ***/ + + //***************************************************************************** + // Hash is called with a pointer to an element in the table. You must override + // this method and provide a hash algorithm for your element type. + //***************************************************************************** + virtual unsigned int Hash( // The key value. + void const *pData); // Raw data to hash. + + //***************************************************************************** + // Compare is used in the typical memcmp way, 0 is eqaulity, -1/1 indicate + // direction of miscompare. In this system everything is always equal or not. + //***************************************************************************** + inline unsigned int Compare( // 0, -1, or 1. + void const *pData, // Raw key data on lookup. + BYTE *pElement); // The element to compare data against. + + //***************************************************************************** + // Return true if the element is free to be used. + //***************************************************************************** + virtual ELEMENTSTATUS Status( // The status of the entry. + BYTE *pElement); // The element to check. + + //***************************************************************************** + // Sets the status of the given element. + //***************************************************************************** + virtual void SetStatus( + BYTE *pElement, // The element to set status for. + ELEMENTSTATUS eStatus); // New status. + + //***************************************************************************** + // Returns the internal key value for an element. + //***************************************************************************** + virtual void *GetKey( // The data to hash on. + BYTE *pElement); // The element to return data ptr for. + +protected: + Module *m_pModule; + ADID m_dwAppDomainId; + Crst m_crst; +}; + +#endif +#endif |