Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Relevant replacement documents include:
MoreMemory/MoreMemory.c
/* |
File: MoreMemory.c |
Contains: Memory utility routines. |
Written by: Quinn |
Copyright: Copyright © 1999 by Apple Computer, Inc., all rights reserved. |
You may incorporate this Apple sample source code into your program(s) without |
restriction. This Apple sample source code has been provided "AS IS" and the |
responsibility for its operation is yours. You are not permitted to redistribute |
this Apple sample source code as "Apple sample source 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 source |
code, but that you've made changes. |
Change History (most recent first): |
<3> 20/3/00 Quinn Added MoreBlockCompare. |
<2> 6/3/00 Quinn Added MoreMemError and temporarily removed SafeHoldMemory from |
Carbon builds. |
<1> 1/3/99 Quinn First checked in. |
*/ |
///////////////////////////////////////////////////////////////// |
// MoreIsBetter Setup |
#include "MoreSetup.h" |
///////////////////////////////////////////////////////////////// |
// Mac OS Interfaces |
#include <Traps.h> |
#include <Patches.h> |
#include <Memory.h> |
///////////////////////////////////////////////////////////////// |
// Our Prototypes |
#include "MoreMemory.h" |
///////////////////////////////////////////////////////////////// |
#if CALL_NOT_IN_CARBON |
extern pascal OSErr SafeHoldMemory(void *start, ByteCount length) |
// See comment in interface part. |
{ |
OSErr err; |
err = noErr; |
if ( GetOSTrapAddress(_HWPriv) != GetToolTrapAddress(_Unimplemented) ) { |
err = HoldMemory(start, length); |
} |
if (err == paramErr) { |
err = noErr; |
} |
return err; |
} |
extern pascal OSErr SafeUnholdMemory(void *start, ByteCount length) |
// See comment in interface part. |
{ |
OSErr err; |
err = noErr; |
if ( GetOSTrapAddress(_HWPriv) != GetToolTrapAddress(_Unimplemented) ) { |
err = UnholdMemory(start, length); |
} |
if (err == paramErr) { |
err = noErr; |
} |
return err; |
} |
#endif |
extern pascal OSErr MoreMemError(void *p) |
// See comment in interface part. |
{ |
OSErr err; |
err = MemError(); |
if ((err == noErr) && (p == nil)) { |
MoreAssertQ(false); |
err = memFullErr; |
} |
return err; |
} |
extern pascal Boolean MoreBlockCompare(const void *p1, const void *p2, ByteCount numBytes) |
// See comment in interface part. |
{ |
const UInt8 *cursor1; |
const UInt8 *cursor2; |
cursor1 = p1; |
cursor2 = p2; |
while (numBytes > 0 && (*cursor1 == *cursor2)) { |
cursor1 += 1; |
cursor2 += 1; |
numBytes -= 1; |
} |
return (numBytes == 0); |
} |
Copyright © 2003 Apple Computer, Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2003-01-14