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--- xnu/xnu-2422.100.13/libkern/c++/OSSymbol.cpp
+++ xnu/xnu-792.2.4/libkern/c++/OSSymbol.cpp
@@ -1,29 +1,23 @@
/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * 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 */
@@ -40,7 +34,7 @@
#define super OSString
-typedef struct { unsigned int i, j; } OSSymbolPoolState;
+typedef struct { int i, j; } OSSymbolPoolState;
#if OSALLOCDEBUG
extern "C" {
@@ -51,24 +45,6 @@
#define ACCUMSIZE(s)
#endif
-#define INITIAL_POOL_SIZE (exp2ml(1 + log2(kInitBucketCount)))
-
-#define GROW_FACTOR (1)
-#define SHRINK_FACTOR (3)
-
-#define GROW_POOL() do \
- if (count * GROW_FACTOR > nBuckets) { \
- reconstructSymbols(true); \
- } \
-while (0)
-
-#define SHRINK_POOL() do \
- if (count * SHRINK_FACTOR < nBuckets && \
- nBuckets > INITIAL_POOL_SIZE) { \
- reconstructSymbols(false); \
- } \
-while (0)
-
class OSSymbolPool
{
private:
@@ -79,7 +55,7 @@
Bucket *buckets;
unsigned int nBuckets;
unsigned int count;
- lck_mtx_t *poolGate;
+ mutex_t *poolGate;
static inline void hashSymbol(const char *s,
unsigned int *hashP,
@@ -102,8 +78,7 @@
static unsigned long log2(unsigned int x);
static unsigned long exp2ml(unsigned int x);
- void reconstructSymbols(void);
- void reconstructSymbols(bool grow);
+ void reconstructSymbols();
public:
static void *operator new(size_t size);
@@ -115,8 +90,8 @@
bool init();
- inline void closeGate() { lck_mtx_lock(poolGate); };
- inline void openGate() { lck_mtx_unlock(poolGate); };
+ inline void closeGate() { mutex_lock(poolGate); };
+ inline void openGate() { mutex_unlock(poolGate); };
OSSymbol *findSymbol(const char *cString) const;
OSSymbol *insertSymbol(OSSymbol *sym);
@@ -138,16 +113,14 @@
void OSSymbolPool::operator delete(void *mem, size_t size)
{
- kfree(mem, size);
+ kfree((vm_offset_t)mem, size);
ACCUMSIZE(-size);
}
-extern lck_grp_t *IOLockGroup;
-
bool OSSymbolPool::init()
{
count = 0;
- nBuckets = INITIAL_POOL_SIZE;
+ nBuckets = exp2ml(1 + log2(kInitBucketCount));
buckets = (Bucket *) kalloc(nBuckets * sizeof(Bucket));
ACCUMSIZE(nBuckets * sizeof(Bucket));
if (!buckets)
@@ -155,7 +128,7 @@
bzero(buckets, nBuckets * sizeof(Bucket));
- poolGate = lck_mtx_alloc_init(IOLockGroup, LCK_ATTR_NULL);
+ poolGate = mutex_alloc(0);
return poolGate != 0;
}
@@ -172,19 +145,12 @@
OSSymbolPool::~OSSymbolPool()
{
if (buckets) {
- Bucket *thisBucket;
- for (thisBucket = &buckets[0]; thisBucket < &buckets[nBuckets]; thisBucket++) {
- if (thisBucket->count > 1) {
- kfree(thisBucket->symbolP, thisBucket->count * sizeof(OSSymbol *));
- ACCUMSIZE(-(thisBucket->count * sizeof(OSSymbol *)));
- }
- }
- kfree(buckets, nBuckets * sizeof(Bucket));
+ kfree((vm_offset_t)buckets, nBuckets * sizeof(Bucket));
ACCUMSIZE(-(nBuckets * sizeof(Bucket)));
}
if (poolGate)
- lck_mtx_free(poolGate, IOLockGroup);
+ kfree((vm_offset_t) poolGate, 36 * 4);
}
unsigned long OSSymbolPool::log2(unsigned int x)
@@ -226,35 +192,14 @@
return thisBucket->symbolP[stateP->j];
}
-void OSSymbolPool::reconstructSymbols(void)
-{
- this->reconstructSymbols(true);
-}
-
-void OSSymbolPool::reconstructSymbols(bool grow)
-{
- unsigned int new_nBuckets = nBuckets;
+void OSSymbolPool::reconstructSymbols()
+{
+ OSSymbolPool old(this);
OSSymbol *insert;
OSSymbolPoolState state;
- if (grow) {
- new_nBuckets += new_nBuckets + 1;
- } else {
- /* Don't shrink the pool below the default initial size.
- */
- if (nBuckets <= INITIAL_POOL_SIZE) {
- return;
- }
- new_nBuckets = (new_nBuckets - 1) / 2;
- }
-
- /* Create old pool to iterate after doing above check, cause it
- * gets finalized at return.
- */
- OSSymbolPool old(this);
-
+ nBuckets += nBuckets + 1;
count = 0;
- nBuckets = new_nBuckets;
buckets = (Bucket *) kalloc(nBuckets * sizeof(Bucket));
ACCUMSIZE(nBuckets * sizeof(Bucket));
/* @@@ gvdl: Zero test and panic if can't set up pool */
@@ -282,7 +227,7 @@
probeSymbol = (OSSymbol *) thisBucket->symbolP;
if (inLen == probeSymbol->length
- && (strncmp(probeSymbol->string, cString, probeSymbol->length) == 0))
+ && (strcmp(probeSymbol->string, cString) == 0))
return probeSymbol;
return 0;
}
@@ -290,7 +235,7 @@
for (list = thisBucket->symbolP; j--; list++) {
probeSymbol = *list;
if (inLen == probeSymbol->length
- && (strncmp(probeSymbol->string, cString, probeSymbol->length) == 0))
+ && (strcmp(probeSymbol->string, cString) == 0))
return probeSymbol;
}
@@ -319,7 +264,7 @@
probeSymbol = (OSSymbol *) thisBucket->symbolP;
if (inLen == probeSymbol->length
- && strncmp(probeSymbol->string, cString, probeSymbol->length) == 0)
+ && strcmp(probeSymbol->string, cString) == 0)
return probeSymbol;
list = (OSSymbol **) kalloc(2 * sizeof(OSSymbol *));
@@ -330,7 +275,8 @@
thisBucket->symbolP = list;
thisBucket->count++;
count++;
- GROW_POOL();
+ if (count > nBuckets)
+ reconstructSymbols();
return sym;
}
@@ -338,7 +284,7 @@
for (list = thisBucket->symbolP; j--; list++) {
probeSymbol = *list;
if (inLen == probeSymbol->length
- && strncmp(probeSymbol->string, cString, probeSymbol->length) == 0)
+ && strcmp(probeSymbol->string, cString) == 0)
return probeSymbol;
}
@@ -349,10 +295,11 @@
/* @@@ 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;
- GROW_POOL();
+ if (count > nBuckets)
+ reconstructSymbols();
return sym;
}
@@ -368,11 +315,8 @@
j = thisBucket->count;
list = thisBucket->symbolP;
- if (!j) {
- // couldn't find the symbol; probably means string hash changed
- panic("removeSymbol %s count %d ", sym->string ? sym->string : "no string", count);
+ if (!j)
return;
- }
if (j == 1) {
probeSymbol = (OSSymbol *) list;
@@ -381,11 +325,8 @@
thisBucket->symbolP = 0;
count--;
thisBucket->count--;
- SHRINK_POOL();
return;
}
- // couldn't find the symbol; probably means string hash changed
- panic("removeSymbol %s count %d ", sym->string ? sym->string : "no string", count);
return;
}
@@ -393,26 +334,22 @@
probeSymbol = list[0];
if (probeSymbol == sym) {
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--;
- SHRINK_POOL();
return;
}
probeSymbol = list[1];
if (probeSymbol == sym) {
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--;
- SHRINK_POOL();
return;
}
- // couldn't find the symbol; probably means string hash changed
- panic("removeSymbol %s count %d ", sym->string ? sym->string : "no string", count);
return;
}
@@ -430,7 +367,7 @@
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--;
@@ -438,8 +375,6 @@
return;
}
}
- // couldn't find the symbol; probably means string hash changed
- panic("removeSymbol %s count %d ", sym->string ? sym->string : "no string", count);
}
/*
@@ -608,33 +543,3 @@
else
return false;
}
-
-unsigned int
-OSSymbol::bsearch(
- const void * key,
- const void * array,
- unsigned int arrayCount,
- size_t memberSize)
-{
- const void **p;
- unsigned int baseIdx = 0;
- unsigned int lim;
-
- for (lim = arrayCount; lim; lim >>= 1)
- {
- p = (typeof(p)) (((uintptr_t) array) + (baseIdx + (lim >> 1)) * memberSize);
- if (key == *p)
- {
- return (baseIdx + (lim >> 1));
- }
- if (key > *p)
- {
- // move right
- baseIdx += (lim >> 1) + 1;
- lim--;
- }
- // else move left
- }
- // not found, insertion point here
- return (baseIdx + (lim >> 1));
-}