mirror of
https://github.com/elliotnunn/mac-rom.git
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326 lines
8.6 KiB
C
326 lines
8.6 KiB
C
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/*
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File: CommResourceMgr.c
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Contains: Communications Resource Manager
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Written by: Byron Han
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Copyright: <EFBFBD> 1988-1990, 1992 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<13> 4/28/92 DTY Remove hasAliasMgr conditional. Always use the Folder Manager.
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<12> 2/7/92 BH changed define for MANAGERCODE to be TRUE or FALSE to allow
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CommResourceMgrExtensions.c to properly conditionalize for
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TheFuture and for CubeE and for building the glue file
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<11> 7/2/91 BH added __CRMGetHeader
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<10> 8/15/90 kaz Fixed C3.0 bug in _CRMResource calls that would do a SUBQ.L
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instead of a CLR.L for a function result => garbage returned.
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<9> 7/10/90 dba add __ to distinguish routines from glue
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<8> 7/2/90 kaz Code shrink/cleanup.
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<7> 4/9/90 BBH * Moving CRMFindCommunications here from
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CommResourceMgrUtilities.a
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<EFBFBD> Use Folder Mgr if available (instead of manually creating
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Communications Folder use the Extensions folder) this is
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controlled by a conditional compile (if hasAliasMgr)
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<6> 3/22/90 BBH moved getglobals macro to CommToolboxPriv.h
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<5> 3/16/90 BBH fixed problem where deviceID's never got above 2 (after first
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match of deviceType, we would immediately break)
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<4> 3/16/90 BBH fixed GetDeviceID. when trying to match deviceID's was looking
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at garbage.
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<3> 3/16/90 BBH create a macro to get CommToolbox globals
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<2> 3/15/90 BBH Fixed GetList to properly return pointer to commtoolbox globals
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<1> 3/14/90 BBH first checked in
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To Do:
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*/
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#include <SysEqu.h>
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#include <Types.h>
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#include <Memory.h>
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#include <Resources.h>
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#include <OSUtils.h>
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#include <Errors.h>
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#include <CommResources.h>
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#include <CommToolboxPriv.h>
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#include "CommResourceMgr.h"
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// <12> changed to do TRUE and FALSE for the define
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#define __MANAGERCODE__ TRUE
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#include "CommResourceMgrExtensions.c"
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#include <Folders.h>
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// Should be moved to CommToolboxPriv.h
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#define IsResError() ((*(short *) ResErr) != noErr)
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// initializes the Communications Resource Manager
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pascal CRMErr __InitCRM()
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{
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/* Shouldn't we return an error if CTB Globals didn't get allocated */
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/*
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if CRMGetGlobals & CRMGetGlobals->crmQueue != nil
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*/
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return(noErr);
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}
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// Folder stuff for 7.0
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pascal OSErr __CRMFindCommunications(vRefNum, dirID)
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short *vRefNum;
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long *dirID;
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{
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return(FindFolder(kOnSystemDisk, kExtensionFolderType, kCreateFolder, vRefNum, dirID));
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}
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pascal OSErr __CRMCreateCommunications(vRefNum, dirID)
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short *vRefNum;
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long *dirID;
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{
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return(FindFolder(kOnSystemDisk, kExtensionFolderType, kCreateFolder, vRefNum, dirID));
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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// Routines for Device Management
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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// adds element to CRM queue
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pascal void __CRMInstall(crmReqPtr)
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QElemPtr crmReqPtr;
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{
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CRMRecPtr pMatch = (CRMRecPtr) crmReqPtr;
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pMatch->qType = crmType;
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pMatch->crmVersion = crmRecVersion;
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pMatch->crmDeviceID = GetDeviceID(pMatch->crmDeviceType);
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Enqueue(crmReqPtr, CRMGetHeader);
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}
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// this removes an entry from the CRM queue
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pascal OSErr __CRMRemove(crmReqPtr)
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QElemPtr crmReqPtr;
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{
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return( Dequeue(crmReqPtr, CRMGetHeader) );
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}
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pascal QHdrPtr __CRMGetHeader(void)
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{
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return CRMGetHeader;
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}
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// this searches for an entry with the same device type and with a
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// device ID bigger than the one specified. since we keep the entry list
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// sorted by device ID, we can do a simple search. maybe we should make this a
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// binary search eventually<6C>
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pascal QElemPtr __CRMSearch(crmReqPtr)
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QElemPtr crmReqPtr;
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{
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CRMRecPtr pMatch = (CRMRecPtr) crmReqPtr;
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CRMRecPtr pWalker = (CRMRecPtr) CRMGetHeader->qHead;
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for (; pWalker != nil; pWalker = (CRMRecPtr) pWalker->qLink)
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if (pWalker->crmDeviceType == pMatch->crmDeviceType)
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if (pWalker->crmDeviceID > pMatch->crmDeviceID)
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return((QElemPtr) pWalker); // we're outta here
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return(nil);
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}
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///////////////////////////////////////////////////////////////////////////////////
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// Utilities Routines
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///////////////////////////////////////////////////////////////////////////////////
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// this returns the next free device ID for the given device type in the
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// crm queue.
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pascal long GetDeviceID(dType)
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long dType;
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{
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CRMRecPtr pWalker = (CRMRecPtr)CRMGetHeader->qHead;
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long rval = 0;
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for (; pWalker != nil; pWalker = (CRMRecPtr) pWalker->qLink)
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if (pWalker->crmDeviceType == dType) // <4>
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if (pWalker->crmDeviceID > rval)
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rval = pWalker->crmDeviceID; // remove break <5>
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return(++rval);
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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// Routines for Resource Management
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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pascal long __CRMGetIndex(hResource)
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Handle hResource;
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{
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CRMResourceCountPtr pMatch = FindResource(hResource);
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long rval = 0;
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if (pMatch != nil) {
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if (pMatch->useCount <= 0)
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RemoveEntry(pMatch); // cleanup please<73>
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else
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rval = pMatch->useCount;
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}
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return(rval);
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}
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pascal Handle CRMGet10Resource(theType, theID, deep)
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ResType theType;
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short theID;
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short deep;
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{
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Handle theHandle;
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theHandle = (deep == 1 ? Get1Resource(theType, theID) : GetResource(theType, theID));
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// Hopefully we can remove this workaround w/ C3.2
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if (IsResError())
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theHandle = nil;
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HandleResource(theHandle);
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return(theHandle);
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}
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pascal Handle CRMGet10IndResource(theType, index, deep)
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ResType theType;
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short index;
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short deep;
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{
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Handle theHandle;
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theHandle = (deep == 1 ? Get1IndResource(theType, index) : GetIndResource(theType, index));
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if (IsResError())
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theHandle = nil;
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HandleResource(theHandle);
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return(theHandle);
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}
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pascal Handle CRMGet10NamedResource(theType, name, deep)
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ResType theType;
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const Str255 name;
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short deep;
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{
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Handle theHandle;
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theHandle = (deep == 1 ? Get1NamedResource(theType, name) : GetNamedResource(theType, name));
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if (IsResError())
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theHandle = nil;
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HandleResource(theHandle);
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return(theHandle);
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}
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pascal void __CRMReleaseResource(Handle pResource)
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{
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CRMResourceCountPtr pMatch = FindResource(pResource);
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if (pMatch != nil) // huh?
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if (--(pMatch->useCount) <= 0) {
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RemoveEntry(pMatch); // pull from list
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pMatch = nil;
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}
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if (pMatch == nil)
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ReleaseResource(pResource);
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}
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///////////////////////////////////////////////////////////////////////////////////
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// Utilities Routines
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///////////////////////////////////////////////////////////////////////////////////
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// this finds the resource count entry for the given resource
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CRMResourceCountPtr FindResource(hResource)
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Handle hResource;
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{
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CRMResourceCountPtr pCRMResourceCount = GetList;
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for (; pCRMResourceCount != nil; pCRMResourceCount = pCRMResourceCount->next)
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if (pCRMResourceCount->theHandle == hResource)
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return(pCRMResourceCount);
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return(nil);
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}
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// this clears the resource counts for the file with the refnum specified
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// used for cleanup purposes<65>
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void ClearResource(refnum)
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short refnum;
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{
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CRMResourceCountPtr curCRM = GetList,
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tempCRM;
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while (curCRM != nil) {
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tempCRM = curCRM->next;
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if (curCRM->refnum == refnum)
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RemoveEntry(curCRM);
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curCRM = tempCRM;
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}
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}
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// this routine adds a resource to the resource count list
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CRMResourceCountPtr RegisterDevice(hResource)
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Handle hResource;
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{
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CRMResourceCountPtr pCRMResourceCount =
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(CRMResourceCountPtr) NewPtrSys(sizeof(CRMResourceCount));
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if (pCRMResourceCount != nil) {
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pCRMResourceCount->next = GetList;
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pCRMResourceCount->useCount = 0;
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pCRMResourceCount->theHandle = hResource;
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GetList = pCRMResourceCount; // put at start of list
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// GetList is a macro
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}
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return(pCRMResourceCount);
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}
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// this routine removes an entry from the resource count list
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void RemoveEntry(pMatch)
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CRMResourceCountPtr pMatch;
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{
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CRMResourceCountPtr curCRM = GetList,
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prevCRM = nil;
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for (; curCRM != nil && pMatch != curCRM;
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prevCRM = curCRM, curCRM = curCRM->next)
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;
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if (curCRM == nil)
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return;
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if (prevCRM == nil) // eliminating first element
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GetList = curCRM->next; // GetList is a macro
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else
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prevCRM->next = curCRM->next;
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DisposPtr((Ptr) curCRM);
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}
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// handle a resource by adding it to the resource count list if necessary
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// and bumping the useCount if needed
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void HandleResource(hResource)
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Handle hResource;
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{
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CRMResourceCountPtr pMatch;
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if (hResource == nil)
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return;
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pMatch = FindResource(hResource); // is it there?
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if (pMatch == nil)
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pMatch = RegisterDevice(hResource); // add to list
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if (pMatch == nil)
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return; // we are F*CKED!
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pMatch->useCount++;
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|
pMatch->refnum = HomeResFile(hResource); // for cleanup purposes
|
|||
|
|
}
|