Security/libsecurity_utilities/lib/powerwatch.h

   1 /*
   2  * Copyright (c) 2000-2001,2003-2004,2011-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
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  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 //
  26 // powerwatch - hook into system notifications of power events
  27 //
  28 #ifndef _H_POWERWATCH
  29 #define _H_POWERWATCH
  30
  31 #include <security_utilities/machserver.h>
  32 #include <IOKit/pwr_mgt/IOPMLib.h>
  33 #include <IOKit/pwr_mgt/IOPMLibPrivate.h>
  34
  35
  36 namespace Security {
  37 namespace MachPlusPlus {
  38
  39
  40 //
  41 // PowerWatcher embodies the ability to respond to power events.
  42 // By itself, it is inert - nobody will call its virtual methods.
  43 // Use one of it subclasses, which take care of "hooking" into an
  44 // event delivery mechanism.
  45 //
  46 class PowerWatcher {
  47 public:
  48     virtual ~PowerWatcher();
  49
  50 public:
  51     virtual void systemWillSleep();
  52     virtual void systemIsWaking();
  53     virtual void systemWillPowerDown();
  54         virtual void systemWillPowerOn();
  55
  56     bool inDarkWake() { return mInDarkWake; }
  57
  58  protected:
  59     bool mInDarkWake;
  60 };
  61
  62
  63 //
  64 // A PowerWatcher that is dispatches events from an IOKit message
  65 //
  66 class IOPowerWatcher : public PowerWatcher {
  67 public:
  68         IOPowerWatcher();
  69         ~IOPowerWatcher();
  70
  71 protected:
  72     io_connect_t mKernelPort;
  73     IONotificationPortRef mPortRef;
  74     io_object_t mHandle;
  75     IOPMConnection mIOPMconn;
  76     dispatch_queue_t mIOPMqueue;
  77     dispatch_group_t mDarkWakeGroup;
  78
  79     static void ioCallback(void *refCon, io_service_t service,
  80         natural_t messageType, void *argument);
  81
  82     static void
  83     iopmcallback(void * param,  IOPMConnection connection,
  84                  IOPMConnectionMessageToken token,
  85                  IOPMSystemPowerStateCapabilities capabilities);
  86
  87     void setupDarkWake();
  88
  89 };
  90
  91
  92 //
  93 // Hook into a "raw" MachServer object for event delivery
  94 //
  95 class PortPowerWatcher : public IOPowerWatcher, public MachServer::NoReplyHandler {
  96 public:
  97     PortPowerWatcher();
  98
  99     boolean_t handle(mach_msg_header_t *in);
 100 };
 101
 102
 103 //
 104 // Someone should add a RunLoopPowerWatcher class here, I suppose.
 105 // Well, if you need one: Tag, You're It!
 106 //
 107
 108
 109 } // end namespace MachPlusPlus
 110
 111 } // end namespace Security
 112
 113 #endif //_H_POWERWATCH