315 lines
9.4 KiB
C
315 lines
9.4 KiB
C
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/**********************************************************************
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Copyright (c) 1992-1999 Microsoft Corporation
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drvproc.c
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DESCRIPTION:
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Driver procedure for the Midi Mapper.
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HISTORY:
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06/09/93 [t-kyleb] created.
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*********************************************************************/
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#include "preclude.h"
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#include <windows.h>
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#include <windowsx.h>
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#include <mmsystem.h>
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#include <mmddk.h>
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#include "idf.h"
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#include <memory.h>
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#include "midimap.h"
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#include "debug.h"
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//=========================== Globals ======================================
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//
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PCHANNEL gapChannel[MAX_CHANNELS] = {NULL};
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WORD gwConfigWhere = 0;
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UINT gcPorts = 0;
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WORD gwFlags = 0;
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HINSTANCE ghinst = NULL;
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PPORT gpportList = NULL;
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PINSTANCE gpinstanceList = NULL;
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PINSTANCE gpIoctlInstance = NULL;
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PINSTRUMENT gpinstrumentList = NULL;
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QUEUE gqFreeSyncObjs;
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HMIDISTRM ghMidiStrm = NULL;
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TCHAR szVersion[] = TEXT (__DATE__)
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TEXT ("@")
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TEXT (__TIME__);
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DWORD gdwVolume = 0xFFFFFFFFL;
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HANDLE hMutexRefCnt = NULL;
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static const TCHAR gszRefCnt[] = TEXT ("MidiMapper_modLongMessage_RefCnt");
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HANDLE hMutexConfig = NULL;
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static const TCHAR gszConfigure[] = TEXT ("MidiMapper_Configure");
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static const TCHAR gszReconfigure[] = TEXT("MidiMapper_Reconfig");
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//=========================== Prototypes ===================================
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//
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PRIVATE LRESULT FNLOCAL GetMapperStatus(
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LPMAPPERSTATUS lpStat);
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/***************************************************************************
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@doc INTERNAL
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@api LRESULT | DriverProc | The entry point for an installable driver.
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@parm DWORD | dwID | For most messages, <p dwID> is the DWORD value
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that the driver returns in response to a <m DRV_OPEN> message.
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Each time that the driver is opened, through the <f DrvOpen> API,
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the driver receives a <m DRV_OPEN> message and can return an
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arbitrary, non-zero value. The installable driver interface
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saves this value and returns a unique driver handle to the
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application. Whenever the application sends a message to the
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driver using the driver handle, the interface routes the message
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to this entry point and passes the corresponding <p dwID>.
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This mechanism allows the driver to use the same or different
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identifiers for multiple opens but ensures that driver handles
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are unique at the application interface layer.
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The following messages are not related to a particular open
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instance of the driver. For these messages, the dwID will always
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be zero.
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DRV_LOAD, DRV_FREE, DRV_ENABLE, DRV_DISABLE, DRV_OPEN
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@parm HDRVR | hdrvr | This is the handle returned to the application
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by the driver interface.
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@parm UINT | umsg | The requested action to be performed. Message
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values below <m DRV_RESERVED> are used for globally defined messages.
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Message values from <m DRV_RESERVED> to <m DRV_USER> are used for
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defined driver protocols. Messages above <m DRV_USER> are used
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for driver specific messages.
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@parm LPARAM | lParam1 | Data for this message. Defined separately for
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each message
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@parm LPARAM | lParam2 | Data for this message. Defined separately for
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each message
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@rdesc Defined separately for each message.
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****************************************************************************/
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LRESULT FNEXPORT DriverProc(
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DWORD_PTR dwID,
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HDRVR hdrvr,
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UINT umsg,
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LPARAM lParam1,
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LPARAM lParam2)
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{
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//
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// NOTE DS is not valid here.
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//
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switch (umsg)
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{
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case DRV_LOAD:
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return(1L);
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case DRV_FREE:
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return(0L);
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case DRV_OPEN:
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case DRV_CLOSE:
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return(1L);
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case DRV_ENABLE:
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// Prevent Synchronization problems
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// During Configuration
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if (NULL != hMutexConfig)
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WaitForSingleObject (hMutexConfig, INFINITE);
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SET_ENABLED;
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DPF(1, TEXT ("Enable!"));
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Configure(0);
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if (NULL != hMutexConfig)
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ReleaseMutex (hMutexConfig);
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return(0L);
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case DRV_DISABLE:
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CLR_ENABLED;
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return(0L);
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case DRV_INSTALL:
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case DRV_REMOVE:
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// If the user installs or removes the driver then let them
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// know that they will have to restart.
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//
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return((LRESULT)DRVCNF_RESTART);
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case DRV_ENABLE_DEBUG:
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return(DbgEnable((BOOL)lParam1));
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case DRV_SET_DEBUG_LEVEL:
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return(DbgSetLevel((UINT)lParam1));
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case DRV_GETMAPPERSTATUS:
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return GetMapperStatus((LPMAPPERSTATUS)lParam1);
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#ifdef DEBUG
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case DRV_REGISTERDEBUGCB:
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DbgRegisterCallback((HWND)lParam1);
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return 1L;
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case DRV_GETNEXTLOGENTRY:
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return (LRESULT)DbgGetNextLogEntry((LPTSTR)lParam1, (UINT)lParam2);
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#endif
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// Let the default handler handle everything else.
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//
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default:
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DPF(1, TEXT ("DriverProc unsupported=%08lX"), (DWORD)umsg);
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return(DefDriverProc(dwID, hdrvr, umsg, lParam1, lParam2));
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}
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} //** DriverProc()
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/***************************************************************************
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@doc internal
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@api LRESULT | GetMapperStatus | Return information about the current
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mapper setup to a debug application.
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@parm LPMAPPERSTATUS | lpStat | Pointer to a structure to receive
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the mapper information. lpStat->cbStruct must be filled in.
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@rdesc | Always returns 0;
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***************************************************************************/
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PRIVATE LRESULT FNLOCAL GetMapperStatus(
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LPMAPPERSTATUS lpStat)
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{
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MAPPERSTATUS stat;
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if (lpStat->cbStruct < sizeof(stat))
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DPF(1, TEXT ("MAPPERSTATUS struct too small -- recompile MAPWATCH!!!"));
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stat.cbStruct = lpStat->cbStruct;
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// stat.DS = __segname("_DATA");
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stat.ghinst = ghinst;
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stat.gwFlags = gwFlags;
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stat.gwConfigWhere = gwConfigWhere;
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stat.pgapChannel = gapChannel;
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stat.gpportList = gpportList;
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stat.gpinstanceList = gpinstanceList;
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stat.gpinstrumentList = gpinstrumentList;
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stat.lpszVersion = szVersion;
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hmemcpy(lpStat, &stat, (UINT)lpStat->cbStruct);
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return 0;
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}
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/***************************************************************************
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@doc internal
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@api BOOL | DllEntryPoint | Entry point for the DLL
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@parm HINSTANCE | hinstDLL | handle of DLL module
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@parm DWORD | fdwReason | Why function was called
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@parm LPVOID | lpvReserved | Reserved = must be NULL
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@rdesc | Should always return TRUE for success.
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***************************************************************************/
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BOOL WINAPI DllEntryPoint(
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HINSTANCE hinstDLL,
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DWORD fdwReason,
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LPVOID lpvReserved)
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{
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static TCHAR BCODE szSection[] = TEXT ("MIDIMAP");
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static TCHAR BCODE szSystemIni[] = TEXT ("system.ini");
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static HANDLE hThread = NULL;
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DWORD dw;
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switch (fdwReason)
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{
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case DLL_PROCESS_ATTACH:
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#ifdef DEBUG
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{
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UINT uDebugLevel;
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uDebugLevel = DbgInitialize(TRUE);
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DPF(0, TEXT ("DllEntryPoint - DLL_PROCESS_ATTACH (hinstDLL=%.4Xh, lpvReserved=%.08lXh)"),
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hinstDLL, lpvReserved);
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DPF(0, TEXT ("Debug Level = %u"), uDebugLevel);
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if (2 <= uDebugLevel)
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DebugBreak();
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}
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#endif
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// Save our instance handle in a global.
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//
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ghinst = hinstDLL;
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// Initialize Synchronization object
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//
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QueueInit(&gqFreeSyncObjs);
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// Initialize modLongMessage RefCnt Synchronization Object
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hMutexRefCnt = CreateMutex (NULL, FALSE, gszRefCnt);
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// Initialize Configure Synchronization Object
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hMutexConfig = CreateMutex (NULL, FALSE, gszConfigure);
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break;
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case DLL_THREAD_ATTACH:
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#ifdef DEBUG
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DPF(0, TEXT ("DllEntryPoint - DLL_THREAD_ATTACH (hinstDLL=%.4Xh, lpvReserved=%.08lXh)"),
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hinstDLL, lpvReserved);
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#endif
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break;
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case DLL_THREAD_DETACH:
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#ifdef DEBUG
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DPF(0, TEXT ("DllEntryPoint - DLL_THREAD_DETACH (hinstDLL=%.4Xh, lpvReserved=%.08lXh)"),
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hinstDLL, lpvReserved);
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#endif
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break;
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case DLL_PROCESS_DETACH:
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// Cleanup Configure Synchronization Object
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//
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if (NULL != hMutexConfig) CloseHandle (hMutexConfig);
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// Cleanup modLongMessage RefCnt Synchronization Object
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//
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if (NULL != hMutexRefCnt) CloseHandle (hMutexRefCnt);
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// Cleanup Synchronization object
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//
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QueueCleanup(&gqFreeSyncObjs);
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// cleanup instance handle
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//
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ghinst = NULL;
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#ifdef DEBUG
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DPF(0, TEXT ("DllEntryPoint - DLL_PROCESS_DETACH (hinstDLL=%.4Xh, lpvReserved=%.08lXh)"),
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hinstDLL, lpvReserved);
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#endif
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break;
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} // End switch (fdwReason)
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return TRUE;
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} // End DllEntryPoint
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