drivers/network/tdi/cte/timer.c

   1 /*
   2  * PROJECT:         ReactOS TDI driver
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            drivers/network/tdi/cte/timer.c
   5  * PURPOSE:         CTE timer support
   6  * PROGRAMMERS:     Oleg Baikalow (obaikalow@gmail.com)
   7  */
   8
   9 /* INCLUDES *****************************************************************/
  10
  11 #include "precomp.h"
  12
  13 /* FIXME: Move to a common header! */
  14 struct _CTE_DELAYED_EVENT;
  15 typedef void (*CTE_WORKER_ROUTINE)(struct _CTE_DELAYED_EVENT *, void *Context);
  16
  17 typedef struct _CTE_TIMER
  18 {
  19     BOOLEAN Queued;
  20     KSPIN_LOCK Lock;
  21     CTE_WORKER_ROUTINE Callback;
  22     PVOID Context;
  23     KDPC Dpc;
  24     KTIMER Timer;
  25 } CTE_TIMER, *PCTE_TIMER;
  26
  27 LONG CteTimeIncrement;
  28
  29 /* FUNCTIONS *****************************************************************/
  30
  31 VOID
  32 NTAPI
  33 InternalDpcRoutine(PKDPC Dpc,
  34                    PVOID Context,
  35                    PVOID SystemArgument1,
  36                    PVOID SystemArgument2)
  37 {
  38     PCTE_TIMER Timer = (PCTE_TIMER)Context;
  39
  40     /* Call our registered callback */
  41     Timer->Callback((struct _CTE_DELAYED_EVENT *)Timer, Timer->Context);
  42 }
  43
  44 /*
  45  * @implemented
  46  */
  47 VOID
  48 NTAPI
  49 CTEInitTimer(PCTE_TIMER Timer)
  50 {
  51     /* Zero all fields */
  52     RtlZeroMemory(Timer, sizeof(CTE_TIMER));
  53
  54     /* Create a DPC and a timer */
  55     KeInitializeDpc(&Timer->Dpc, InternalDpcRoutine, Timer);
  56     KeInitializeTimer(&Timer->Timer);
  57 }
  58
  59 /*
  60  * @implemented
  61  */
  62 BOOLEAN
  63 NTAPI
  64 CTEStartTimer(PCTE_TIMER Timer,
  65               ULONG DueTimeShort,
  66               CTE_WORKER_ROUTINE Callback,
  67               PVOID Context)
  68 {
  69     LARGE_INTEGER DueTime;
  70
  71     /* Make sure a callback was provided */
  72     ASSERT(Callback);
  73
  74     /* We need to convert due time, because DueTimeShort is in ms,
  75        but NT timer expects 100s of ns, negative one */
  76     DueTime.QuadPart = -Int32x32To64(DueTimeShort, 10000);
  77
  78     /* Set other timer members */
  79     Timer->Callback = Callback;
  80     Timer->Context = Context;
  81
  82     /* Set the timer */
  83     KeSetTimer(&Timer->Timer, DueTime, &Timer->Dpc);
  84
  85     return TRUE;
  86 }
  87
  88
  89 /*
  90  * @implemented
  91  */
  92 ULONG
  93 NTAPI
  94 CTESystemUpTime(VOID)
  95 {
  96     LARGE_INTEGER Ticks;
  97
  98     /* Get the tick count */
  99     KeQueryTickCount(&Ticks);
 100
 101     /* Convert to 100s of ns and then to ms*/
 102     Ticks.QuadPart = (Ticks.QuadPart * CteTimeIncrement) / 10000ULL;
 103
 104     return Ticks.LowPart;
 105 }
 106
 107 /*
 108  * @implemented
 109  */
 110 BOOLEAN
 111 NTAPI
 112 CTEInitialize(VOID)
 113 {
 114     /* Just return success */
 115     return TRUE;
 116 }
 117
 118 /* EOF */