| 1 | /* $Id: event.cpp,v 1.1 2000/04/23 14:55:15 ktk Exp $ */
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| 2 |
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| 3 | /* SCCSID = %W% %E% */
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| 4 | /****************************************************************************
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| 5 | * *
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| 6 | * Copyright (c) IBM Corporation 1994 - 1997. *
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| 7 | * *
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| 8 | * The following IBM OS/2 source code is provided to you solely for the *
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| 9 | * the purpose of assisting you in your development of OS/2 device drivers. *
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| 10 | * You may use this code in accordance with the IBM License Agreement *
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| 11 | * provided in the IBM Device Driver Source Kit for OS/2. *
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| 12 | * *
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| 13 | ****************************************************************************/
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| 14 | /**@internal %W%
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| 15 | * @notes
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| 16 | * Member fucntions for the EVENT class.
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| 17 | * @version %I%
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| 18 | * @context Unless otherwise noted, all interfaces are Ring-0, 16-bit,
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| 19 | * <stack context>.
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| 20 | * @history
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| 21 | *
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| 22 | */
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| 23 | #define INCL_NOPMAPI
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| 24 | #define INCL_DOSERRORS // for ERROR_INVALID_FUNCTION
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| 25 | #include <os2.h>
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| 26 | #include <os2me.h>
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| 27 | #include <audio.h>
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| 28 | #ifndef DDCMD_REG_STREAM // shdd.h can't handle being included twice
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| 29 | #include <shdd.h>
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| 30 | #endif
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| 31 |
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| 32 | #include "stream.hpp"
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| 33 | #include "event.hpp"
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| 34 | #include <include.h>
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| 35 | #include "dbgos2.h"
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| 36 |
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| 37 | /**@internal Report
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| 38 | * @param None
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| 39 | * @return None
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| 40 | * @notes
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| 41 | * This function will report (return) an expired event to SHDD
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| 42 | */
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| 43 | void EVENT::Report(ULONG time)
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| 44 | {
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| 45 | ULONG ulPopTime;
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| 46 |
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| 47 | // update the streamtime in the event report msg
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| 48 | shdre.ulStreamTime = time;
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| 49 |
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| 50 | // set ulNextTime to -1 incase MMPM comes back in on
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| 51 | // this thread and clobbers this event
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| 52 | ulPopTime = ulNextTime;
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| 53 | ulNextTime = 0xFFFFFFFF;
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| 54 |
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| 55 | // send the event back to the SHDD
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| 56 | pstream->pfnSHD(&shdre);
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| 57 |
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| 58 | // if ulNextTime is still -1 then
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| 59 | // we can see if we need to recalculate ulNextTime
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| 60 | if (ulNextTime == 0xFFFFFFFF) {
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| 61 | // if this is a recurring event re-calculate ulNextTime
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| 62 | if (ulFlags) {
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| 63 | ulNextTime = ulRepeatTime + ulPopTime;
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| 64 | shdre.ulStreamTime = ulNextTime;
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| 65 | }
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| 66 | }
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| 67 | // tell the stream to find the next event to time out
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| 68 | pstream->SetNextEvent();
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| 69 | }
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| 70 |
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| 71 | /*Rudi: now inlined ...
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| 72 | HEVENT EVENT::GetHandle(void)
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| 73 | {
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| 74 | return(he);
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| 75 | }
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| 76 |
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| 77 | ULONG EVENT::GetEventTime(void)
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| 78 | {
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| 79 | return(ulNextTime);
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| 80 | }
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| 81 | */
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| 82 |
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| 83 | /**@internal UpdateEvent
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| 84 | * @param PSTREAM the address of the stream that owns this event
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| 85 | * @param HEVENT the handle of this event
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| 86 | * @param PCONTROL_PARM the address of the control parm associated with
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| 87 | * this event
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| 88 | * @return None
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| 89 | * @notes
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| 90 | * "Updates" the event info when MMPM sends an Enable Event DDCMD and
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| 91 | * the event has already been created.
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| 92 | * Upon entry to this member function we could be touching values that
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| 93 | * the interrupt handler may look at so we will cli/sti around the whole thing
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| 94 | */
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| 95 | void EVENT::UpdateEvent(PSTREAM ps, HEVENT hevent, PCONTROL_PARM pcp)
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| 96 | {
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| 97 |
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| 98 | cli();
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| 99 | pstream=ps;
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| 100 | he=hevent;
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| 101 | ULONG currenttime;
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| 102 |
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| 103 | currenttime = ps->GetCurrentTime();
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| 104 | ulFlags = pcp->evcb.ulFlags & EVENT_RECURRING;
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| 105 |
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| 106 | if (ulFlags)
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| 107 | ulRepeatTime = pcp->ulTime - currenttime;
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| 108 |
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| 109 | ulNextTime = pcp->ulTime;
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| 110 | shdre.ulFunction = SHD_REPORT_EVENT;
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| 111 | shdre.hStream = pstream->hstream;
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| 112 | shdre.hEvent = he;
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| 113 | shdre.ulStreamTime = ulNextTime;
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| 114 | sti();
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| 115 | }
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| 116 | /**@internal EVENT
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| 117 | * @param PSTREAM the address of the stream that owns this event
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| 118 | * @param HEVENT the handle of this event
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| 119 | * @param PCONTROL_PARM the address of the control parm associated with
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| 120 | * this event
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| 121 | * @return None
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| 122 | * @notes
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| 123 | * the event class constructor
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| 124 | */
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| 125 | EVENT::EVENT(PSTREAM ps, HEVENT hevent, PCONTROL_PARM pcp)
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| 126 | {
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| 127 | UpdateEvent(ps, hevent, pcp);
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| 128 | ps->qhEvent.PushOnTail((PQUEUEELEMENT)this);
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| 129 | }
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| 130 | /**@internal FindEvent
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| 131 | * @param HEVENT event handle the caller is looking for
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| 132 | * @param PQUEUEHEAD the pointer the QUEUEHEAD for this EVENT
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| 133 | * @return PEVENT the pointer to the event in question
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| 134 | * @return NULL NULL if EVENT is not found
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| 135 | * @notes
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| 136 | * Globally scopped function that returns the pointer to a particular
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| 137 | * event on the event queue
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| 138 | */
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| 139 | PEVENT FindEvent(HEVENT he, PQUEUEHEAD pQH)
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| 140 | {
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| 141 | PQUEUEELEMENT pqe = pQH->Head();
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| 142 |
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| 143 | while (pqe) {
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| 144 | if (((PEVENT)pqe)->GetHandle() == he)
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| 145 | return (PEVENT)pqe;
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| 146 | pqe = pqe->pNext;
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| 147 | }
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| 148 | return NULL;
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| 149 | }
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