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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxFileManagement-date.html">File Management</a> > <A HREF="javascript:location.replace('index.html');">AsyncPB</A> >
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<pre class="sourcecodebox">/* File: AsyncPB.c Description:AsyncPB is an example of how File System calls can be made in a chain from an interrupt handler like the Time Manager. Once you select DoIt from the menu give it a little time to actually process the input file. Author: JB Copyright: Copyright: © 1984-1999 by Apple Computer, Inc. all rights reserved. Disclaimer: You may incorporate this sample code into your applications without restriction, though the sample code has been provided "AS IS" and the responsibility for its operation is 100% yours. However, what you are not permitted to do is to redistribute the source as "DSC Sample Code" after having made changes. If you're going to re-distribute the source, we require that you make it clear in the source that the code was descended from Apple Sample Code, but that you've made changes. Change History (most recent first): 6/24/99 Updated for Metrowerks Codewarror Pro 2.1(KG)*/#include <Aliases.h>#include <AppleEvents.h>#include <Balloons.h>#include <Controls.h>#include <Desk.h>#include <Dialogs.h>#include <Events.h>#include <Errors.h>#include <Files.h>#include <Folders.h>#include <Fonts.h>#include <GestaltEqu.h>#include <Icons.h>#include <Memory.h>#include <Menus.h>#include <OSUtils.h>#include <Packages.h>#include <Printing.h>#include <Quickdraw.h>#include <Resources.h>#include <Script.h>#include <StandardFile.h>#include <String.h>#include <Strings.h>#include <LowMem.h>#include <TextEdit.h>#include <Timer.h>#include <ToolUtils.h>#include <Traps.h>#include <Types.h>#include <Windows.h>#include "AsyncPB.h"Boolean gInForeGround = true;Boolean gProcessing = true;unsigned long gSleep = 0;#ifdef powercQDGlobals qd;#endif#ifndef powercMyParamBlockPtr GetParmBlockPtr() = { 0x2008 }; // move.l a0, d0 ;move the pointer to where MPW C places function resultsMyTaskPtr GetTMTaskPtr() = { 0x2009 }; // move.l a1, d0 ;move the pointer to where MPW C places function results#endif#ifdef powercpascal void PBWriteIOCompletion(ParmBlkPtr parmblkptr)#elsepascal void PBWriteIOCompletion()#endif{ MyParamBlockPtr pb; #ifdef powerc pb = (MyParamBlockPtr)parmblkptr; #else pb = GetParmBlockPtr(); #endif if (noErr == (*pb).ioParam.ioResult) { PrimeTime((QElemPtr) (*pb).tm, 1000 * 1); }}#ifdef powercpascal void PBReadIOCompletion(ParmBlkPtr parmblkptr)#elsepascal void PBReadIOCompletion()#endif{ MyParamBlockPtr pb; #ifdef powerc pb = (MyParamBlockPtr)parmblkptr; #else pb = GetParmBlockPtr(); #endif if (noErr == (*pb).ioParam.ioResult) { (*pb).ioParam.ioCompletion = (*pb).writeIOCompletion; (*pb).ioParam.ioRefNum = (*pb).writeFileRefNum; (*pb).ioParam.ioReqCount = (*pb).ioParam.ioActCount; (*pb).ioParam.ioPosMode = fsAtMark; (*pb).ioParam.ioPosOffset = 0; PBWriteAsync((ParmBlkPtr) pb); }}#ifdef powercpascal void PBSetFPosIOCompletion(ParmBlkPtr parmblkptr)#elsepascal void PBSetFPosIOCompletion()#endif{ MyParamBlockPtr pb; #ifdef powerc pb = (MyParamBlockPtr)parmblkptr; #else pb = GetParmBlockPtr(); #endif if (noErr == (*pb).ioParam.ioResult) { (*pb).ioParam.ioCompletion = (*pb).readIOCompletion; (*pb).ioParam.ioRefNum = (*pb).readFileRefNum; (*pb).ioParam.ioReqCount = 1; (*pb).ioParam.ioPosMode = fsAtMark; (*pb).ioParam.ioPosOffset = 0; PBReadAsync((ParmBlkPtr) pb); }}#ifdef powercpascal void TMTaskProc(MyTaskPtr tm)#elsepascal void TMTaskProc()#endif{ /* on the PowerPC, the task record ptr is passed as a parameter */ /* in 68K we have to get it from A1 */ #ifndef powerc MyTaskPtr tm; tm = GetTMTaskPtr(); #endif (*(*tm).pb).ioParam.ioCompletion = (*(*tm).pb).setFPosIOCompletion; (*(*tm).pb).ioParam.ioRefNum = (*(*tm).pb).readFileRefNum; (*(*tm).pb).ioParam.ioPosMode = fsFromMark; (*(*tm).pb).ioParam.ioPosOffset = 2; PBSetFPosAsync((ParmBlkPtr) (*tm).pb);}void DoMenu(short menu, short item){ OSErr error = noErr; Str255 daName; short daRefNum; Point where = { 30, 10 }; switch (menu) { case AppleMenu : { switch (item) { case AboutItem : { Alert(AboutAlert, nil); } break; default : { GetMenuItemText(GetMenuHandle(AppleMenu), item, daName); daRefNum = OpenDeskAcc(daName); } break; } } break; case FileMenu : { switch (item) { case DoIt : { DisableItem(GetMenuHandle(FileMenu), DoIt); error = FSOpen("\pinData", 0, &gPB.readFileRefNum); error = FSDelete("\pOutData", 0); error = Create("\pOutData", 0, 'CWIE', 'TEXT'); error = FSOpen("\pOutData", 0, &gPB.writeFileRefNum); gPB.ioParam.ioBuffer = &gBuffer; gPB.tm = (TMTaskPtr) &gTM; gPB.setFPosIOCompletion = NewIOCompletionProc (PBSetFPosIOCompletion); gPB.readIOCompletion = NewIOCompletionProc (PBReadIOCompletion); gPB.writeIOCompletion = NewIOCompletionProc (PBWriteIOCompletion); #if false gPB.ioParam.ioCompletion = gPB.setFPosIOCompletion; gPB.ioParam.ioRefNum = gPB.readFileRefNum; gPB.ioParam.ioPosMode = fsFromMark; gPB.ioParam.ioPosOffset = 3; PBSetFPosAsync((ParmBlkPtr) &gPB); #else gTM.theTMTask.qType = 0; gTM.theTMTask.tmCount = 0; gTM.theTMTask.tmAddr = NewTimerProc(TMTaskProc); gTM.pb = &gPB; InsTime((QElemPtr) &gTM); PrimeTime((QElemPtr) &gTM, 30 * 1); #endif } break; case QuitItem : { RmvTime((QElemPtr)&gTM); gProcessing = false; } break; } } break; default : { } break; }} void EventLoop(){ OSErr error = noErr; EventRecord event; Boolean gotEvent; WindowPtr window; DialogPtr dialog; short itemHit; short part; long menuItem; short menu; short item; gotEvent = WaitNextEvent(everyEvent, &event, gSleep, nil); if (IsDialogEvent(&event)) { if (! ((keyDown == event.what || autoKey == event.what) && (event.modifiers & cmdKey))) { if (DialogSelect(&event, &dialog, &itemHit)) { } } } else { switch (event.what) { case nullEvent: { } break; case mouseDown: { switch (part = FindWindow(event.where, &window)) { case inMenuBar: { menuItem = MenuSelect(event.where); menu = HiWord(menuItem); item = LoWord(menuItem); DoMenu(menu, item); HiliteMenu(0); } break; case inContent : { if (! (*(WindowPeek)window).hilited) { SelectWindow(window); } else if (kWindowKind == (*(WindowPeek)window).windowKind) { } } break; case inGrow : { #define kMinWidth 128 #define kMinWeight 64 auto Rect limitRect; auto long newSize; if (kWindowKind == (*(WindowPeek)window).windowKind) { limitRect = qd.screenBits.bounds; InsetRect(&limitRect, 8, 8); limitRect.top = kMinWeight; limitRect.left = kMinWidth; newSize = GrowWindow(window, event.where, &limitRect); if (0 != newSize) { SizeWindow(window, LoWord(newSize), HiWord(newSize), true); } } } break; case inDrag: { DragWindow(window, event.where, &qd.screenBits.bounds); } break; case inGoAway : { if (TrackGoAway(window, event.where)) { } } break; case inZoomIn : case inZoomOut : { if (kWindowKind == (*(WindowPeek)window).windowKind) { if ( TrackBox(window, event.where, part) ) { SetPort(window); EraseRect(&window->portRect); ZoomWindow(window, part, true); InvalRect(&window->portRect); } } } break; } } break; case updateEvt: { window = (WindowPtr) event.message; if (kWindowKind == (*(WindowPeek)window).windowKind) { SetPort(window); BeginUpdate(window); { } EndUpdate(window); } } break; case activateEvt: { window = (WindowPtr) event.message; if (kWindowKind == (*(WindowPeek)window).windowKind) { } } break; case autoKey: case keyDown: { auto char key; key = event.message & charCodeMask; if (event.modifiers & cmdKey) { menuItem = MenuKey(key); menu = HiWord(menuItem); item = LoWord(menuItem); DoMenu(menu, item); } else { window = FrontWindow(); if (kWindowKind == (*(WindowPeek)window).windowKind) { } } } break; case osEvt: { switch ((event.message >> 24) & 0x0FF) { case suspendResumeMessage: { gInForeGround = 0 != (event.message & resumeFlag); } break; } } break; case kHighLevelEvent: { error = AEProcessAppleEvent(&event); } break; } }}main (){ OSErr error = noErr; Handle menuBar; InitGraf(&qd.thePort); InitFonts(); InitWindows(); InitMenus(); TEInit(); InitDialogs(nil); InitCursor(); menuBar = GetNewMBar(ApplicationMenuBar); if (nil == menuBar) { error = ResError(); if (noErr == error) { error = resNotFound; ExitToShell(); } } else { SetMenuBar(menuBar); DisposeHandle(menuBar); AppendResMenu(GetMenuHandle(AppleMenu), 'DRVR'); DrawMenuBar(); } while (gProcessing) EventLoop(); return 0;}</pre>
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