| /**************************************************************************** |
| * |
| * SciTech Nucleus Graphics Architecture |
| * |
| * Copyright (C) 1991-1998 SciTech Software, Inc. |
| * All rights reserved. |
| * |
| * ====================================================================== |
| * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| |
| * | | |
| * |This copyrighted computer code contains proprietary technology | |
| * |owned by SciTech Software, Inc., located at 505 Wall Street, | |
| * |Chico, CA 95928 USA (http://www.scitechsoft.com). | |
| * | | |
| * |The contents of this file are subject to the SciTech Nucleus | |
| * |License; you may *not* use this file or related software except in | |
| * |compliance with the License. You may obtain a copy of the License | |
| * |at http://www.scitechsoft.com/nucleus-license.txt | |
| * | | |
| * |Software distributed under the License is distributed on an | |
| * |"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
| * |implied. See the License for the specific language governing | |
| * |rights and limitations under the License. | |
| * | | |
| * |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| |
| * ====================================================================== |
| * |
| * Language: ANSI C |
| * Environment: OS/2 32-bit |
| * |
| * Description: OS specific Nucleus Graphics Architecture services for |
| * the OS/2 operating system environments. |
| * |
| ****************************************************************************/ |
| |
| #include "pm_help.h" |
| #define INCL_DOSERRORS |
| #define INCL_DOS |
| #define INCL_SUB |
| #define INCL_VIO |
| #define INCL_KBD |
| #include <os2.h> |
| |
| /*---------------------------- Global Variables ---------------------------*/ |
| |
| static HFILE hSDDHelp; |
| static ulong outLen; /* Must not cross 64Kb boundary! */ |
| static ulong result; /* Must not cross 64Kb boundary! */ |
| static ibool haveRDTSC; |
| |
| /*-------------------------- Implementation -------------------------------*/ |
| |
| /**************************************************************************** |
| REMARKS: |
| This function returns a pointer to the common graphics driver loaded in the |
| helper VxD. The memory for the VxD is shared between all processes via |
| the VxD, so that the VxD, 16-bit code and 32-bit code all see the same |
| state when accessing the graphics binary portable driver. |
| ****************************************************************************/ |
| GA_sharedInfo * NAPI GA_getSharedInfo( |
| int device) |
| { |
| /* Initialise the PM library and connect to our runtime DLL's */ |
| PM_init(); |
| |
| /* Open our helper device driver */ |
| if (DosOpen(PMHELP_NAME,&hSDDHelp,&result,0,0, |
| FILE_OPEN, OPEN_SHARE_DENYNONE | OPEN_ACCESS_READWRITE, |
| NULL)) |
| PM_fatalError("Unable to open SDDHELP$ helper device driver!"); |
| outLen = sizeof(result); |
| DosDevIOCtl(hSDDHelp,PMHELP_IOCTL,PMHELP_GETSHAREDINFO, |
| NULL, 0, NULL, |
| &result, outLen, &outLen); |
| DosClose(hSDDHelp); |
| if (result) { |
| /* We have found the shared Nucleus packet. Because not all processes |
| * map to SDDPMI.DLL, we need to ensure that we connect to this |
| * DLL so that it gets mapped into our address space (that is |
| * where the shared Nucleus packet is located). Simply doing a |
| * DosLoadModule on it is enough for this. |
| */ |
| HMODULE hModSDDPMI; |
| char buf[80]; |
| DosLoadModule((PSZ)buf,sizeof(buf),(PSZ)"SDDPMI.DLL",&hModSDDPMI); |
| } |
| return (GA_sharedInfo*)result; |
| } |
| |
| /**************************************************************************** |
| REMARKS: |
| Nothing special for this OS. |
| ****************************************************************************/ |
| ibool NAPI GA_getSharedExports( |
| GA_exports *gaExp) |
| { |
| (void)gaExp; |
| return false; |
| } |
| |
| /**************************************************************************** |
| REMARKS: |
| This function initialises the high precision timing functions for the |
| Nucleus loader library. |
| ****************************************************************************/ |
| ibool NAPI GA_TimerInit(void) |
| { |
| if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) |
| haveRDTSC = true; |
| return true; |
| } |
| |
| /**************************************************************************** |
| REMARKS: |
| This function reads the high resolution timer. |
| ****************************************************************************/ |
| void NAPI GA_TimerRead( |
| GA_largeInteger *value) |
| { |
| if (haveRDTSC) |
| _GA_readTimeStamp(value); |
| else |
| DosTmrQueryTime((QWORD*)value); |
| } |
