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-/****************************************************************************
-*
-* 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 ibool haveRDTSC = false;
-static ulong parms[3]; /* Must not cross 64Kb boundary! */
-static ulong result[4]; /* Must not cross 64Kb boundary! */
-
-/*-------------------------- Implementation -------------------------------*/
-
-/****************************************************************************
-PARAMETERS:
-func - Helper device driver function to call
-
-RETURNS:
-First return value from the device driver in parmsOut[0]
-
-REMARKS:
-Function to open our helper device driver, call it and close the file
-handle. Note that we have to open the device driver for every call because
-of two problems:
-
- 1. We cannot open a single file handle in a DLL that is shared amongst
- programs, since every process must have it's own open file handle.
-
- 2. For some reason there appears to be a limit of about 12 open file
- handles on a device driver in the system. Hence when we open more
- than about 12 file handles things start to go very strange.
-
-Hence we simply open the file handle every time that we need to call the
-device driver to work around these problems.
-****************************************************************************/
-static ulong CallSDDHelp(
- int func)
-{
- static ulong inLen; /* Must not cross 64Kb boundary! */
- static ulong outLen; /* Must not cross 64Kb boundary! */
- HFILE hSDDHelp;
-
- /* If this code in here fails, we are screwed! Many of our drivers
- * use this code and don't have a C library, so we simply assume we
- * can't fail here.
- */
- DosOpen(PMHELP_NAME,&hSDDHelp,&result[0],0,0,
- FILE_OPEN, OPEN_SHARE_DENYNONE | OPEN_ACCESS_READWRITE,
- NULL);
- DosDevIOCtl(hSDDHelp,PMHELP_IOCTL,func,
- &parms, inLen = sizeof(parms), &inLen,
- &result, outLen = sizeof(result), &outLen);
- DosClose(hSDDHelp);
- return result[0];
-}
-
-/****************************************************************************
-PARAMETERS:
-path - Local path to the Nucleus driver files.
-
-REMARKS:
-This function is used by the application program to override the location
-of the Nucleus driver files that are loaded. Normally the loader code
-will look in the system Nucleus directories first, then in the 'drivers'
-directory relative to the current working directory, and finally relative
-to the MGL_ROOT environment variable.
-****************************************************************************/
-void NAPI GA_setLocalPath(
- const char *path)
-{
- PM_setLocalBPDPath(path);
-}
-
-/****************************************************************************
-RETURNS:
-Pointer to the system wide PM library imports, or the internal version if none
-
-REMARKS:
-For OS/2 we don't need to do anything special because Nucleus is always
-loaded via the shared SDDPMI driver when SDD is loaded so we don't need
-a system wide PM library imports function.
-****************************************************************************/
-PM_imports * NAPI GA_getSystemPMImports(void)
-{
- return &_PM_imports;
-}
-
-/****************************************************************************
-PARAMETERS:
-gaExp - Place to store the exported functions
-shared - True if connecting to the shared, global Nucleus driver
-
-REMARKS:
-For OS/2 if SDD is loaded we *always* connect to the shared Nucleus functions
-contained within the SDDPMI driver. This allows the Nucleus functions contained
-within this driver to be utilised by all Nucleus apps in the system and
-maintains a consistent state between versions.
-****************************************************************************/
-ibool NAPI GA_getSharedExports(
- GA_exports *gaExp,
- ibool shared)
-{
- /* In test harness mode, we need to load a local copy of Nucleus */
-#if !defined (TEST_HARNESS) || defined (DEBUG_SDDPMI)
- HMODULE hModSDDPMI;
- char buf[80];
- GA_exports *exp;
-
- /* Initialise the PM library and connect to our runtime DLL's */
- PM_init();
- if (CallSDDHelp(PMHELP_GETSHAREDEXP) != 0) {
- /* We have found the shared Nucleus exports. 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 loader code is located). Simply doing a
- * DosLoadModule on it is enough for this.
- */
- DosLoadModule((PSZ)buf,sizeof(buf),(PSZ)"SDDPMI.DLL",&hModSDDPMI);
- exp = (GA_exports*)result[0];
- memcpy(gaExp,exp,MIN(gaExp->dwSize,exp->dwSize));
- return true;
- }
-#endif
- (void)shared;
- return false;
-}
-
-#ifndef TEST_HARNESS
-/****************************************************************************
-REMARKS:
-Nothing special for this OS
-****************************************************************************/
-ibool NAPI GA_queryFunctions(
- GA_devCtx *dc,
- N_uint32 id,
- void _FAR_ *funcs)
-{
- return __GA_exports.GA_queryFunctions(dc,id,funcs);
-}
-
-/****************************************************************************
-REMARKS:
-Nothing special for this OS
-****************************************************************************/
-ibool NAPI REF2D_queryFunctions(
- REF2D_driver *ref2d,
- N_uint32 id,
- void _FAR_ *funcs)
-{
- return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs);
-}
-#endif
-
-/****************************************************************************
-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);
-}
-
-/****************************************************************************
-REMARKS:
-On OS/2, we need special memory allocation functions if we build SDDPMI in
-test harness mode. But if we build GATest etc. in test mode, we want to use
-the normal C runtime functions, so route them back here.
-****************************************************************************/
-
-#if defined (TEST_HARNESS) && !defined (DEBUG_SDDPMI)
-
-/* Undefine these macros first or we'll recurse to hell! */
-#undef malloc
-#undef calloc
-#undef realloc
-#undef free
-
-void *SDDPMI_malloc(size_t size) {
- return malloc(size);
-}
-
-void *SDDPMI_calloc(size_t num, size_t size) {
- return calloc(num, size);
-}
-
-void SDDPMI_free(void *ptr) {
- free(ptr);
-}
-
-void *SDDPMI_realloc(void *ptr, size_t size) {
- return realloc(ptr, size);
-}
-
-#endif