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--- xnu/xnu-792.22.5/libkern/c++/OSSymbol.cpp
+++ xnu/xnu-201.19/libkern/c++/OSSymbol.cpp
@@ -1,33 +1,26 @@
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_HEADER_START@
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
*
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ * @APPLE_LICENSE_HEADER_END@
*/
/* IOSymbol.cpp created by gvdl on Fri 1998-11-17 */
-#include <string.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
@@ -36,7 +29,6 @@
#include <libkern/c++/OSSymbol.h>
#include <libkern/c++/OSLib.h>
-#include <string.h>
#define super OSString
@@ -101,7 +93,7 @@
OSSymbol *findSymbol(const char *cString) const;
OSSymbol *insertSymbol(OSSymbol *sym);
- void removeSymbol(OSSymbol *sym);
+ void removeSymbol(const char *cString);
OSSymbolPoolState initHashState();
OSSymbol *nextHashState(OSSymbolPoolState *stateP);
@@ -119,7 +111,7 @@
void OSSymbolPool::operator delete(void *mem, size_t size)
{
- kfree(mem, size);
+ kfree((vm_offset_t)mem, size);
ACCUMSIZE(-size);
}
@@ -151,12 +143,12 @@
OSSymbolPool::~OSSymbolPool()
{
if (buckets) {
- kfree(buckets, nBuckets * sizeof(Bucket));
+ kfree((vm_offset_t)buckets, nBuckets * sizeof(Bucket));
ACCUMSIZE(-(nBuckets * sizeof(Bucket)));
}
if (poolGate)
- kfree(poolGate, 36 * 4);
+ kfree((vm_offset_t) poolGate, 36 * 4);
}
unsigned long OSSymbolPool::log2(unsigned int x)
@@ -233,15 +225,18 @@
probeSymbol = (OSSymbol *) thisBucket->symbolP;
if (inLen == probeSymbol->length
- && (strcmp(probeSymbol->string, cString) == 0))
+ && (strcmp(probeSymbol->string, cString) == 0)
+ && (probeSymbol->getRetainCount() >= 1)) // WRONG need when
return probeSymbol;
- return 0;
+ else
+ return 0;
}
for (list = thisBucket->symbolP; j--; list++) {
probeSymbol = *list;
if (inLen == probeSymbol->length
- && (strcmp(probeSymbol->string, cString) == 0))
+ && (strcmp(probeSymbol->string, cString) == 0)
+ && (probeSymbol->getRetainCount() >= 1)) // WRONG need when
return probeSymbol;
}
@@ -263,7 +258,7 @@
thisBucket->symbolP = (OSSymbol **) sym;
thisBucket->count++;
count++;
- return sym;
+ return 0;
}
if (j == 1) {
@@ -284,7 +279,7 @@
if (count > nBuckets)
reconstructSymbols();
- return sym;
+ return 0;
}
for (list = thisBucket->symbolP; j--; list++) {
@@ -301,22 +296,22 @@
/* @@@ gvdl: Zero test and panic if can't set up pool */
list[0] = sym;
bcopy(thisBucket->symbolP, list + 1, j * sizeof(OSSymbol *));
- kfree(thisBucket->symbolP, j * sizeof(OSSymbol *));
+ kfree((vm_offset_t)thisBucket->symbolP, j * sizeof(OSSymbol *));
ACCUMSIZE(-(j * sizeof(OSSymbol *)));
thisBucket->symbolP = list;
if (count > nBuckets)
reconstructSymbols();
- return sym;
-}
-
-void OSSymbolPool::removeSymbol(OSSymbol *sym)
+ return 0;
+}
+
+void OSSymbolPool::removeSymbol(const char *cString)
{
Bucket *thisBucket;
unsigned int j, inLen, hash;
OSSymbol *probeSymbol, **list;
- hashSymbol(sym->string, &hash, &inLen); inLen++;
+ hashSymbol(cString, &hash, &inLen); inLen++;
thisBucket = &buckets[hash % nBuckets];
j = thisBucket->count;
list = thisBucket->symbolP;
@@ -327,7 +322,8 @@
if (j == 1) {
probeSymbol = (OSSymbol *) list;
- if (probeSymbol == sym) {
+ if (inLen == probeSymbol->length
+ && strcmp(probeSymbol->string, cString) == 0) {
thisBucket->symbolP = 0;
count--;
thisBucket->count--;
@@ -338,9 +334,10 @@
if (j == 2) {
probeSymbol = list[0];
- if (probeSymbol == sym) {
+ if (inLen == probeSymbol->length
+ && strcmp(probeSymbol->string, cString) == 0) {
thisBucket->symbolP = (OSSymbol **) list[1];
- kfree(list, 2 * sizeof(OSSymbol *));
+ kfree((vm_offset_t)list, 2 * sizeof(OSSymbol *));
ACCUMSIZE(-(2 * sizeof(OSSymbol *)));
count--;
thisBucket->count--;
@@ -348,9 +345,10 @@
}
probeSymbol = list[1];
- if (probeSymbol == sym) {
+ if (inLen == probeSymbol->length
+ && strcmp(probeSymbol->string, cString) == 0) {
thisBucket->symbolP = (OSSymbol **) list[0];
- kfree(list, 2 * sizeof(OSSymbol *));
+ kfree((vm_offset_t)list, 2 * sizeof(OSSymbol *));
ACCUMSIZE(-(2 * sizeof(OSSymbol *)));
count--;
thisBucket->count--;
@@ -361,7 +359,8 @@
for (; j--; list++) {
probeSymbol = *list;
- if (probeSymbol == sym) {
+ if (inLen == probeSymbol->length
+ && strcmp(probeSymbol->string, cString) == 0) {
list = (OSSymbol **)
kalloc((thisBucket->count-1) * sizeof(OSSymbol *));
@@ -373,7 +372,7 @@
bcopy(thisBucket->symbolP + thisBucket->count-j,
list + thisBucket->count-1-j,
j * sizeof(OSSymbol *));
- kfree(thisBucket->symbolP, thisBucket->count * sizeof(OSSymbol *));
+ kfree((vm_offset_t)thisBucket->symbolP, thisBucket->count * sizeof(OSSymbol *));
ACCUMSIZE(-(thisBucket->count * sizeof(OSSymbol *)));
thisBucket->symbolP = list;
count--;
@@ -433,60 +432,40 @@
{
pool->closeGate();
- OSSymbol *oldSymb = pool->findSymbol(cString);
- if (!oldSymb) {
- OSSymbol *newSymb = new OSSymbol;
- if (!newSymb) {
- pool->openGate();
- return newSymb;
- }
-
+ OSSymbol *newSymb = pool->findSymbol(cString);
+ if (newSymb)
+ newSymb->retain();
+ else if ( (newSymb = new OSSymbol) ) {
if (newSymb->OSString::initWithCString(cString))
- oldSymb = pool->insertSymbol(newSymb);
-
- if (newSymb == oldSymb) {
- pool->openGate();
- return newSymb; // return the newly created & inserted symbol.
- }
- else
- // Somebody else inserted the new symbol so free our copy
- newSymb->OSString::free();
- }
-
- oldSymb->retain(); // Retain the old symbol before releasing the lock.
-
+ pool->insertSymbol(newSymb);
+ else {
+ newSymb->free();
+ newSymb = 0;
+ }
+ }
pool->openGate();
- return oldSymb;
+
+ return newSymb;
}
const OSSymbol *OSSymbol::withCStringNoCopy(const char *cString)
{
pool->closeGate();
- OSSymbol *oldSymb = pool->findSymbol(cString);
- if (!oldSymb) {
- OSSymbol *newSymb = new OSSymbol;
- if (!newSymb) {
- pool->openGate();
- return newSymb;
- }
-
+ OSSymbol *newSymb = pool->findSymbol(cString);
+ if (newSymb)
+ newSymb->retain();
+ else if ( (newSymb = new OSSymbol) ) {
if (newSymb->OSString::initWithCStringNoCopy(cString))
- oldSymb = pool->insertSymbol(newSymb);
-
- if (newSymb == oldSymb) {
- pool->openGate();
- return newSymb; // return the newly created & inserted symbol.
- }
- else
- // Somebody else inserted the new symbol so free our copy
- newSymb->OSString::free();
- }
-
- oldSymb->retain(); // Retain the old symbol before releasing the lock.
-
+ pool->insertSymbol(newSymb);
+ else {
+ newSymb->free();
+ newSymb = 0;
+ }
+ }
pool->openGate();
- return oldSymb;
+
+ return newSymb;
}
void OSSymbol::checkForPageUnload(void *startAddr, void *endAddr)
@@ -509,21 +488,12 @@
pool->openGate();
}
-void OSSymbol::taggedRelease(const void *tag) const
-{
- super::taggedRelease(tag);
-}
-
-void OSSymbol::taggedRelease(const void *tag, const int when) const
+void OSSymbol::free()
{
pool->closeGate();
- super::taggedRelease(tag, when);
+ pool->removeSymbol(string);
pool->openGate();
-}
-
-void OSSymbol::free()
-{
- pool->removeSymbol(this);
+
super::free();
}