cdsa/cssm/module.h

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // module - CSSM Module objects
  21 //
  22 #ifndef _H_MODULE
  23 #define _H_MODULE
  24
  25 #include "cssmint.h"
  26 #include "cssmmds.h"
  27 #include <Security/callback.h>
  28 #include <Security/modloader.h>
  29 #include <set>
  30
  31 #if __GNUC__ > 2
  32 #include <ext/hash_map>
  33 using __gnu_cxx::hash_map;
  34 #else
  35 #include <hash_map>
  36 #endif
  37
  38
  39 //
  40 // This type represents a loaded plugin module of some kind. For each CssmManager
  41 // instance and each one plugin, there is only (at most) one Module object to
  42 // represent it.
  43 //
  44 class Module : public MdsComponent {
  45     NOCOPY(Module)
  46 public:
  47     Module(CssmManager *mgr, const MdsComponent &info, Plugin *plugin);
  48     virtual ~Module();
  49
  50     CssmManager &cssm;
  51
  52     bool unload(const ModuleCallback &callback);
  53
  54     CSSM_HANDLE attach(const CSSM_VERSION &version,
  55                        uint32 subserviceId,
  56                        CSSM_SERVICE_TYPE subserviceType,
  57                        const CSSM_API_MEMORY_FUNCS &memoryOps,
  58                        CSSM_ATTACH_FLAGS attachFlags,
  59                        CSSM_KEY_HIERARCHY keyHierarchy,
  60                        CSSM_FUNC_NAME_ADDR *functionTable,
  61                        uint32 functionTableSize);
  62     void detach(Attachment *attachment);
  63
  64     void add(const ModuleCallback &cb) { callbackSet.insert(cb); }
  65     void remove(const ModuleCallback &cb) { callbackSet.erase(cb); }
  66
  67     unsigned int callbackCount() const { return callbackSet.size(); }
  68     unsigned int attachmentCount() const { return attachmentMap.size(); }
  69
  70         void safeLock()         { if (!isThreadSafe()) mLock.lock(); }
  71         void safeUnlock()       { if (!isThreadSafe()) mLock.unlock(); }
  72
  73 public:
  74     typedef hash_map<CSSM_HANDLE, Attachment *> AttachmentMap;
  75
  76     Plugin *plugin;                                     // our loader module
  77
  78 private:
  79     void spiEvent(CSSM_MODULE_EVENT event,
  80                          const Guid &guid,
  81                          uint32 subserviceId,
  82                          CSSM_SERVICE_TYPE serviceType);
  83
  84     static CSSM_RETURN spiEventRelay(const CSSM_GUID *ModuleGuid,
  85                                      void *Context,
  86                                      uint32 SubserviceId,
  87                                      CSSM_SERVICE_TYPE ServiceType,
  88                                      CSSM_MODULE_EVENT EventType);
  89
  90 private:
  91     AttachmentMap attachmentMap;        // map of all outstanding attachment handles
  92     ModuleCallbackSet callbackSet;      // set of registered callbacks
  93
  94     Mutex mLock;
  95 };
  96
  97 #endif //_H_MODULE