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CFArray.c
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/*
* Copyright (c) 2015 Apple Inc. All rights reserved.
*
* @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. 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
* 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.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* CFArray.c
Copyright (c) 1998-2014, Apple Inc. All rights reserved.
Responsibility: Christopher Kane
*/
#include <CoreFoundation/CFArray.h>
#include <CoreFoundation/CFPriv.h>
#include "CFInternal.h"
#include <string.h>
const CFArrayCallBacks kCFTypeArrayCallBacks = {0, __CFTypeCollectionRetain, __CFTypeCollectionRelease, CFCopyDescription, CFEqual};
static const CFArrayCallBacks __kCFNullArrayCallBacks = {0, NULL, NULL, NULL, NULL};
struct __CFArrayBucket {
const void *_item;
};
enum {
__CF_MAX_BUCKETS_PER_DEQUE = LONG_MAX
};
CF_INLINE CFIndex __CFArrayDequeRoundUpCapacity(CFIndex capacity) {
if (capacity < 4) return 4;
return __CFMin((1 << flsl(capacity)), __CF_MAX_BUCKETS_PER_DEQUE);
}
struct __CFArrayDeque {
uintptr_t _leftIdx;
uintptr_t _capacity;
/* struct __CFArrayBucket buckets follow here */
};
struct __CFArray {
CFRuntimeBase _base;
CFIndex _count; /* number of objects */
CFIndex _mutations;
int32_t _mutInProgress;
__strong void *_store; /* can be NULL when MutableDeque */
};
/* Flag bits */
enum { /* Bits 0-1 */
__kCFArrayImmutable = 0,
__kCFArrayDeque = 2,
};
enum { /* Bits 2-3 */
__kCFArrayHasNullCallBacks = 0,
__kCFArrayHasCFTypeCallBacks = 1,
__kCFArrayHasCustomCallBacks = 3 /* callbacks are at end of header */
};
/*
Bits 4 & 5 are reserved for GC use.
Bit 4, if set, indicates that the array is weak.
Bit 5 marks whether finalization has occured and, thus, whether to continue to do special retain/release processing of elements.
*/
CF_INLINE bool isStrongMemory(CFTypeRef collection) {
return __CFBitfieldGetValue(((const CFRuntimeBase *)collection)->_cfinfo[CF_INFO_BITS], 4, 4) == 0;
}
CF_INLINE bool isWeakMemory(CFTypeRef collection) {
return __CFBitfieldGetValue(((const CFRuntimeBase *)collection)->_cfinfo[CF_INFO_BITS], 4, 4) != 0;
}
CF_INLINE bool hasBeenFinalized(CFTypeRef collection) {
return __CFBitfieldGetValue(((const CFRuntimeBase *)collection)->_cfinfo[CF_INFO_BITS], 5, 5) != 0;
}
#if DEPLOYMENT_TARGET_MACOSX
CF_INLINE void markFinalized(CFTypeRef collection) {
__CFBitfieldSetValue(((CFRuntimeBase *)collection)->_cfinfo[CF_INFO_BITS], 5, 5, 1);
}
#endif
CF_INLINE CFIndex __CFArrayGetType(CFArrayRef array) {
return __CFBitfieldGetValue(((const CFRuntimeBase *)array)->_cfinfo[CF_INFO_BITS], 1, 0);
}
CF_INLINE CFIndex __CFArrayGetSizeOfType(CFIndex t) {
CFIndex size = 0;
size += sizeof(struct __CFArray);
if (__CFBitfieldGetValue(t, 3, 2) == __kCFArrayHasCustomCallBacks) {
size += sizeof(CFArrayCallBacks);
}
return size;
}
CF_INLINE CFIndex __CFArrayGetCount(CFArrayRef array) {
return array->_count;
}
CF_INLINE void __CFArraySetCount(CFArrayRef array, CFIndex v) {
((struct __CFArray *)array)->_count = v;
}
/* Only applies to immutable and mutable-deque-using arrays;
* Returns the bucket holding the left-most real value in the latter case. */
CF_INLINE struct __CFArrayBucket *__CFArrayGetBucketsPtr(CFArrayRef array) {
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
return (struct __CFArrayBucket *)((uint8_t *)array + __CFArrayGetSizeOfType(((CFRuntimeBase *)array)->_cfinfo[CF_INFO_BITS]));
case __kCFArrayDeque: {
struct __CFArrayDeque *deque = (struct __CFArrayDeque *)array->_store;
return (struct __CFArrayBucket *)((uint8_t *)deque + sizeof(struct __CFArrayDeque) + deque->_leftIdx * sizeof(struct __CFArrayBucket));
}
}
return NULL;
}
CF_EXPORT Boolean _CFArrayIsMutable(CFArrayRef array) {
return __CFArrayGetType(array) != __kCFArrayImmutable;
}
/* This shouldn't be called if the array count is 0. */
CF_INLINE struct __CFArrayBucket *__CFArrayGetBucketAtIndex(CFArrayRef array, CFIndex idx) {
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
case __kCFArrayDeque:
return __CFArrayGetBucketsPtr(array) + idx;
}
return NULL;
}
CF_PRIVATE CFArrayCallBacks *__CFArrayGetCallBacks(CFArrayRef array) {
CFArrayCallBacks *result = NULL;
switch (__CFBitfieldGetValue(((const CFRuntimeBase *)array)->_cfinfo[CF_INFO_BITS], 3, 2)) {
case __kCFArrayHasNullCallBacks:
return (CFArrayCallBacks *)&__kCFNullArrayCallBacks;
case __kCFArrayHasCFTypeCallBacks:
return (CFArrayCallBacks *)&kCFTypeArrayCallBacks;
case __kCFArrayHasCustomCallBacks:
break;
}
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
result = (CFArrayCallBacks *)((uint8_t *)array + sizeof(struct __CFArray));
break;
case __kCFArrayDeque:
result = (CFArrayCallBacks *)((uint8_t *)array + sizeof(struct __CFArray));
break;
}
return result;
}
CF_INLINE bool __CFArrayCallBacksMatchNull(const CFArrayCallBacks *c) {
return (NULL == c ||
(c->retain == __kCFNullArrayCallBacks.retain &&
c->release == __kCFNullArrayCallBacks.release &&
c->copyDescription == __kCFNullArrayCallBacks.copyDescription &&
c->equal == __kCFNullArrayCallBacks.equal));
}
CF_INLINE bool __CFArrayCallBacksMatchCFType(const CFArrayCallBacks *c) {
return (&kCFTypeArrayCallBacks == c ||
(c->retain == kCFTypeArrayCallBacks.retain &&
c->release == kCFTypeArrayCallBacks.release &&
c->copyDescription == kCFTypeArrayCallBacks.copyDescription &&
c->equal == kCFTypeArrayCallBacks.equal));
}
#if 0
#define CHECK_FOR_MUTATION(A) do { if ((A)->_mutInProgress) CFLog(3, CFSTR("*** %s: function called while the array (%p) is being mutated in this or another thread"), __PRETTY_FUNCTION__, (A)); } while (0)
#define BEGIN_MUTATION(A) do { OSAtomicAdd32Barrier(1, &((struct __CFArray *)(A))->_mutInProgress); } while (0)
#define END_MUTATION(A) do { OSAtomicAdd32Barrier(-1, &((struct __CFArray *)(A))->_mutInProgress); } while (0)
#else
#define CHECK_FOR_MUTATION(A) do { } while (0)
#define BEGIN_MUTATION(A) do { } while (0)
#define END_MUTATION(A) do { } while (0)
#endif
struct _releaseContext {
void (*release)(CFAllocatorRef, const void *);
CFAllocatorRef allocator;
};
static void __CFArrayReleaseValues(CFArrayRef array, CFRange range, bool releaseStorageIfPossible) {
const CFArrayCallBacks *cb = __CFArrayGetCallBacks(array);
CFAllocatorRef allocator;
CFIndex idx;
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
if (NULL != cb->release && 0 < range.length && !hasBeenFinalized(array)) {
// if we've been finalized then we know that
// 1) we're using the standard callback on GC memory
// 2) the slots don't' need to be zeroed
struct __CFArrayBucket *buckets = __CFArrayGetBucketsPtr(array);
allocator = __CFGetAllocator(array);
for (idx = 0; idx < range.length; idx++) {
INVOKE_CALLBACK2(cb->release, allocator, buckets[idx + range.location]._item);
buckets[idx + range.location]._item = NULL; // GC: break strong reference.
}
}
break;
case __kCFArrayDeque: {
struct __CFArrayDeque *deque = (struct __CFArrayDeque *)array->_store;
if (0 < range.length && NULL != deque && !hasBeenFinalized(array)) {
struct __CFArrayBucket *buckets = __CFArrayGetBucketsPtr(array);
if (NULL != cb->release) {
allocator = __CFGetAllocator(array);
for (idx = 0; idx < range.length; idx++) {
INVOKE_CALLBACK2(cb->release, allocator, buckets[idx + range.location]._item);
buckets[idx + range.location]._item = NULL; // GC: break strong reference.
}
} else {
for (idx = 0; idx < range.length; idx++) {
buckets[idx + range.location]._item = NULL; // GC: break strong reference.
}
}
}
if (releaseStorageIfPossible && 0 == range.location && __CFArrayGetCount(array) == range.length) {
allocator = __CFGetAllocator(array);
if (NULL != deque) if (!CF_IS_COLLECTABLE_ALLOCATOR(allocator)) CFAllocatorDeallocate(allocator, deque);
__CFArraySetCount(array, 0); // GC: _count == 0 ==> _store == NULL.
((struct __CFArray *)array)->_store = NULL;
}
break;
}
}
}
#if defined(DEBUG)
CF_INLINE void __CFArrayValidateRange(CFArrayRef array, CFRange range, const char *func) {
CFAssert3(0 <= range.location && range.location <= CFArrayGetCount(array), __kCFLogAssertion, "%s(): range.location index (%d) out of bounds (0, %d)", func, range.location, CFArrayGetCount(array));
CFAssert2(0 <= range.length, __kCFLogAssertion, "%s(): range.length (%d) cannot be less than zero", func, range.length);
CFAssert3(range.location + range.length <= CFArrayGetCount(array), __kCFLogAssertion, "%s(): ending index (%d) out of bounds (0, %d)", func, range.location + range.length, CFArrayGetCount(array));
}
#else
#define __CFArrayValidateRange(a,r,f)
#endif
static Boolean __CFArrayEqual(CFTypeRef cf1, CFTypeRef cf2) {
CFArrayRef array1 = (CFArrayRef)cf1;
CFArrayRef array2 = (CFArrayRef)cf2;
const CFArrayCallBacks *cb1, *cb2;
CFIndex idx, cnt;
if (array1 == array2) return true;
cnt = __CFArrayGetCount(array1);
if (cnt != __CFArrayGetCount(array2)) return false;
cb1 = __CFArrayGetCallBacks(array1);
cb2 = __CFArrayGetCallBacks(array2);
if (cb1->equal != cb2->equal) return false;
if (0 == cnt) return true; /* after function comparison! */
for (idx = 0; idx < cnt; idx++) {
const void *val1 = __CFArrayGetBucketAtIndex(array1, idx)->_item;
const void *val2 = __CFArrayGetBucketAtIndex(array2, idx)->_item;
if (val1 != val2) {
if (NULL == cb1->equal) return false;
if (!INVOKE_CALLBACK2(cb1->equal, val1, val2)) return false;
}
}
return true;
}
static CFHashCode __CFArrayHash(CFTypeRef cf) {
CFArrayRef array = (CFArrayRef)cf;
return __CFArrayGetCount(array);
}
static CFStringRef __CFArrayCopyDescription(CFTypeRef cf) {
CFArrayRef array = (CFArrayRef)cf;
CFMutableStringRef result;
const CFArrayCallBacks *cb;
CFAllocatorRef allocator;
CFIndex idx, cnt;
cnt = __CFArrayGetCount(array);
allocator = CFGetAllocator(array);
result = CFStringCreateMutable(allocator, 0);
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
CFStringAppendFormat(result, NULL, CFSTR("<CFArray %p [%p]>{type = immutable, count = %lu, values = (%s"), cf, allocator, (unsigned long)cnt, cnt ? "\n" : "");
break;
case __kCFArrayDeque:
CFStringAppendFormat(result, NULL, CFSTR("<CFArray %p [%p]>{type = mutable-small, count = %lu, values = (%s"), cf, allocator, (unsigned long)cnt, cnt ? "\n" : "");
break;
}
cb = __CFArrayGetCallBacks(array);
for (idx = 0; idx < cnt; idx++) {
CFStringRef desc = NULL;
const void *val = __CFArrayGetBucketAtIndex(array, idx)->_item;
if (NULL != cb->copyDescription) {
desc = (CFStringRef)INVOKE_CALLBACK1(cb->copyDescription, val);
}
if (NULL != desc) {
CFStringAppendFormat(result, NULL, CFSTR("\t%lu : %@\n"), (unsigned long)idx, desc);
CFRelease(desc);
} else {
CFStringAppendFormat(result, NULL, CFSTR("\t%lu : <%p>\n"), (unsigned long)idx, val);
}
}
CFStringAppend(result, CFSTR(")}"));
return result;
}
static void __CFArrayDeallocate(CFTypeRef cf) {
CFArrayRef array = (CFArrayRef)cf;
BEGIN_MUTATION(array);
#if DEPLOYMENT_TARGET_MACOSX
// Under GC, keep contents alive when we know we can, either standard callbacks or NULL
// if (__CFBitfieldGetValue(cf->info, 5, 4)) return; // bits only ever set under GC
CFAllocatorRef allocator = __CFGetAllocator(array);
if (CF_IS_COLLECTABLE_ALLOCATOR(allocator)) {
// XXX_PCB keep array intact during finalization.
const CFArrayCallBacks *cb = __CFArrayGetCallBacks(array);
if (cb->retain == NULL && cb->release == NULL) {
END_MUTATION(array);
return;
}
if (cb == &kCFTypeArrayCallBacks || cb->release == kCFTypeArrayCallBacks.release) {
markFinalized(cf);
for (CFIndex idx = 0; idx < __CFArrayGetCount(array); idx++) {
const void *item = CFArrayGetValueAtIndex(array, 0 + idx);
kCFTypeArrayCallBacks.release(kCFAllocatorSystemDefault, item);
}
END_MUTATION(array);
return;
}
}
#endif
__CFArrayReleaseValues(array, CFRangeMake(0, __CFArrayGetCount(array)), true);
END_MUTATION(array);
}
static CFTypeID __kCFArrayTypeID = _kCFRuntimeNotATypeID;
static const CFRuntimeClass __CFArrayClass = {
_kCFRuntimeScannedObject,
"CFArray",
NULL, // init
NULL, // copy
__CFArrayDeallocate,
__CFArrayEqual,
__CFArrayHash,
NULL, //
__CFArrayCopyDescription
};
CFTypeID CFArrayGetTypeID(void) {
static dispatch_once_t initOnce;
dispatch_once(&initOnce, ^{ __kCFArrayTypeID = _CFRuntimeRegisterClass(&__CFArrayClass); });
return __kCFArrayTypeID;
}
static CFArrayRef __CFArrayInit(CFAllocatorRef allocator, UInt32 flags, CFIndex capacity, const CFArrayCallBacks *callBacks) {
struct __CFArray *memory;
UInt32 size;
__CFBitfieldSetValue(flags, 31, 2, 0);
if (CF_IS_COLLECTABLE_ALLOCATOR(allocator)) {
if (!callBacks || (callBacks->retain == NULL && callBacks->release == NULL)) {
__CFBitfieldSetValue(flags, 4, 4, 1); // setWeak
}
}
if (__CFArrayCallBacksMatchNull(callBacks)) {
__CFBitfieldSetValue(flags, 3, 2, __kCFArrayHasNullCallBacks);
} else if (__CFArrayCallBacksMatchCFType(callBacks)) {
__CFBitfieldSetValue(flags, 3, 2, __kCFArrayHasCFTypeCallBacks);
} else {
__CFBitfieldSetValue(flags, 3, 2, __kCFArrayHasCustomCallBacks);
}
size = __CFArrayGetSizeOfType(flags) - sizeof(CFRuntimeBase);
switch (__CFBitfieldGetValue(flags, 1, 0)) {
case __kCFArrayImmutable:
size += capacity * sizeof(struct __CFArrayBucket);
break;
case __kCFArrayDeque:
break;
}
memory = (struct __CFArray*)_CFRuntimeCreateInstance(allocator, CFArrayGetTypeID(), size, NULL);
if (NULL == memory) {
return NULL;
}
__CFBitfieldSetValue(memory->_base._cfinfo[CF_INFO_BITS], 6, 0, flags);
__CFArraySetCount((CFArrayRef)memory, 0);
switch (__CFBitfieldGetValue(flags, 1, 0)) {
case __kCFArrayImmutable:
if (isWeakMemory(memory)) { // if weak, don't scan
auto_zone_set_unscanned(objc_collectableZone(), memory);
}
if (__CFOASafe) __CFSetLastAllocationEventName(memory, "CFArray (immutable)");
break;
case __kCFArrayDeque:
if (__CFOASafe) __CFSetLastAllocationEventName(memory, "CFArray (mutable-variable)");
((struct __CFArray *)memory)->_mutations = 1;
((struct __CFArray *)memory)->_mutInProgress = 0;
((struct __CFArray*)memory)->_store = NULL;
break;
}
if (__kCFArrayHasCustomCallBacks == __CFBitfieldGetValue(flags, 3, 2)) {
CFArrayCallBacks *cb = (CFArrayCallBacks *)__CFArrayGetCallBacks((CFArrayRef)memory);
*cb = *callBacks;
FAULT_CALLBACK((void **)&(cb->retain));
FAULT_CALLBACK((void **)&(cb->release));
FAULT_CALLBACK((void **)&(cb->copyDescription));
FAULT_CALLBACK((void **)&(cb->equal));
}
return (CFArrayRef)memory;
}
CF_PRIVATE CFArrayRef __CFArrayCreateTransfer(CFAllocatorRef allocator, const void **values, CFIndex numValues) {
CFAssert2(0 <= numValues, __kCFLogAssertion, "%s(): numValues (%d) cannot be less than zero", __PRETTY_FUNCTION__, numValues);
UInt32 flags = __kCFArrayImmutable;
__CFBitfieldSetValue(flags, 31, 2, 0);
__CFBitfieldSetValue(flags, 3, 2, __kCFArrayHasCFTypeCallBacks);
UInt32 size = __CFArrayGetSizeOfType(flags) - sizeof(CFRuntimeBase);
size += numValues * sizeof(struct __CFArrayBucket);
struct __CFArray *memory = (struct __CFArray*)_CFRuntimeCreateInstance(allocator, CFArrayGetTypeID(), size, NULL);
if (NULL == memory) {
return NULL;
}
__CFBitfieldSetValue(memory->_base._cfinfo[CF_INFO_BITS], 6, 0, flags);
__CFArraySetCount(memory, numValues);
memmove(__CFArrayGetBucketsPtr(memory), values, sizeof(void *) * numValues);
if (__CFOASafe) __CFSetLastAllocationEventName(memory, "CFArray (immutable)");
return (CFArrayRef)memory;
}
CF_PRIVATE CFArrayRef __CFArrayCreate0(CFAllocatorRef allocator, const void **values, CFIndex numValues, const CFArrayCallBacks *callBacks) {
CFArrayRef result;
const CFArrayCallBacks *cb;
struct __CFArrayBucket *buckets;
CFAllocatorRef bucketsAllocator;
void* bucketsBase;
CFIndex idx;
CFAssert2(0 <= numValues, __kCFLogAssertion, "%s(): numValues (%d) cannot be less than zero", __PRETTY_FUNCTION__, numValues);
result = __CFArrayInit(allocator, __kCFArrayImmutable, numValues, callBacks);
cb = __CFArrayGetCallBacks(result);
buckets = __CFArrayGetBucketsPtr(result);
bucketsAllocator = isStrongMemory(result) ? allocator : kCFAllocatorNull;
bucketsBase = CF_IS_COLLECTABLE_ALLOCATOR(bucketsAllocator) ? (void *)auto_zone_base_pointer(objc_collectableZone(), buckets) : NULL;
if (NULL != cb->retain) {
for (idx = 0; idx < numValues; idx++) {
__CFAssignWithWriteBarrier((void **)&buckets->_item, (void *)INVOKE_CALLBACK2(cb->retain, allocator, *values));
values++;
buckets++;
}
}
else {
for (idx = 0; idx < numValues; idx++) {
__CFAssignWithWriteBarrier((void **)&buckets->_item, (void *)*values);
values++;
buckets++;
}
}
__CFArraySetCount(result, numValues);
return result;
}
CF_PRIVATE CFMutableArrayRef __CFArrayCreateMutable0(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks) {
CFAssert2(0 <= capacity, __kCFLogAssertion, "%s(): capacity (%d) cannot be less than zero", __PRETTY_FUNCTION__, capacity);
CFAssert2(capacity <= LONG_MAX / sizeof(void *), __kCFLogAssertion, "%s(): capacity (%d) is too large for this architecture", __PRETTY_FUNCTION__, capacity);
return (CFMutableArrayRef)__CFArrayInit(allocator, __kCFArrayDeque, capacity, callBacks);
}
CF_PRIVATE CFArrayRef __CFArrayCreateCopy0(CFAllocatorRef allocator, CFArrayRef array) {
CFArrayRef result;
const CFArrayCallBacks *cb;
struct __CFArrayBucket *buckets;
CFAllocatorRef bucketsAllocator;
void* bucketsBase;
CFIndex numValues = CFArrayGetCount(array);
CFIndex idx;
if (CF_IS_OBJC(CFArrayGetTypeID(), array)) {
cb = &kCFTypeArrayCallBacks;
} else {
cb = __CFArrayGetCallBacks(array);
}
result = __CFArrayInit(allocator, __kCFArrayImmutable, numValues, cb);
cb = __CFArrayGetCallBacks(result); // GC: use the new array's callbacks so we don't leak.
buckets = __CFArrayGetBucketsPtr(result);
bucketsAllocator = isStrongMemory(result) ? allocator : kCFAllocatorNull;
bucketsBase = CF_IS_COLLECTABLE_ALLOCATOR(bucketsAllocator) ? (void *)auto_zone_base_pointer(objc_collectableZone(), buckets) : NULL;
for (idx = 0; idx < numValues; idx++) {
const void *value = CFArrayGetValueAtIndex(array, idx);
if (NULL != cb->retain) {
value = (void *)INVOKE_CALLBACK2(cb->retain, allocator, value);
}
__CFAssignWithWriteBarrier((void **)&buckets->_item, (void *)value);
buckets++;
}
__CFArraySetCount(result, numValues);
return result;
}
CF_PRIVATE CFMutableArrayRef __CFArrayCreateMutableCopy0(CFAllocatorRef allocator, CFIndex capacity, CFArrayRef array) {
CFMutableArrayRef result;
const CFArrayCallBacks *cb;
CFIndex idx, numValues = CFArrayGetCount(array);
UInt32 flags;
if (CF_IS_OBJC(CFArrayGetTypeID(), array)) {
cb = &kCFTypeArrayCallBacks;
}
else {
cb = __CFArrayGetCallBacks(array);
}
flags = __kCFArrayDeque;
result = (CFMutableArrayRef)__CFArrayInit(allocator, flags, capacity, cb);
if (0 == capacity) _CFArraySetCapacity(result, numValues);
for (idx = 0; idx < numValues; idx++) {
const void *value = CFArrayGetValueAtIndex(array, idx);
CFArrayAppendValue(result, value);
}
return result;
}
#define DEFINE_CREATION_METHODS 1
#if DEFINE_CREATION_METHODS
CFArrayRef CFArrayCreate(CFAllocatorRef allocator, const void **values, CFIndex numValues, const CFArrayCallBacks *callBacks) {
return __CFArrayCreate0(allocator, values, numValues, callBacks);
}
CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks) {
return __CFArrayCreateMutable0(allocator, capacity, callBacks);
}
CFArrayRef CFArrayCreateCopy(CFAllocatorRef allocator, CFArrayRef array) {
return __CFArrayCreateCopy0(allocator, array);
}
CFMutableArrayRef CFArrayCreateMutableCopy(CFAllocatorRef allocator, CFIndex capacity, CFArrayRef array) {
return __CFArrayCreateMutableCopy0(allocator, capacity, array);
}
#endif
CFIndex CFArrayGetCount(CFArrayRef array) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), CFIndex, (NSArray *)array, count);
__CFGenericValidateType(array, CFArrayGetTypeID());
CHECK_FOR_MUTATION(array);
return __CFArrayGetCount(array);
}
CFIndex CFArrayGetCountOfValue(CFArrayRef array, CFRange range, const void *value) {
CFIndex idx, count = 0;
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
const CFArrayCallBacks *cb = CF_IS_OBJC(CFArrayGetTypeID(), array) ? &kCFTypeArrayCallBacks : __CFArrayGetCallBacks(array);
for (idx = 0; idx < range.length; idx++) {
const void *item = CFArrayGetValueAtIndex(array, range.location + idx);
if (value == item || (cb->equal && INVOKE_CALLBACK2(cb->equal, value, item))) {
count++;
}
}
return count;
}
Boolean CFArrayContainsValue(CFArrayRef array, CFRange range, const void *value) {
CFIndex idx;
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
const CFArrayCallBacks *cb = CF_IS_OBJC(CFArrayGetTypeID(), array) ? &kCFTypeArrayCallBacks : __CFArrayGetCallBacks(array);
for (idx = 0; idx < range.length; idx++) {
const void *item = CFArrayGetValueAtIndex(array, range.location + idx);
if (value == item || (cb->equal && INVOKE_CALLBACK2(cb->equal, value, item))) {
return true;
}
}
return false;
}
const void *CFArrayGetValueAtIndex(CFArrayRef array, CFIndex idx) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), const void *, (NSArray *)array, objectAtIndex:idx);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert2(0 <= idx && idx < __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index (%d) out of bounds", __PRETTY_FUNCTION__, idx);
CHECK_FOR_MUTATION(array);
return __CFArrayGetBucketAtIndex(array, idx)->_item;
}
// This is for use by NSCFArray; it avoids ObjC dispatch, and checks for out of bounds
const void *_CFArrayCheckAndGetValueAtIndex(CFArrayRef array, CFIndex idx) {
CHECK_FOR_MUTATION(array);
if (0 <= idx && idx < __CFArrayGetCount(array)) return __CFArrayGetBucketAtIndex(array, idx)->_item;
return (void *)(-1);
}
void CFArrayGetValues(CFArrayRef array, CFRange range, const void **values) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSArray *)array, getObjects:(id *)values range:NSMakeRange(range.location, range.length));
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CFAssert1(NULL != values, __kCFLogAssertion, "%s(): pointer to values may not be NULL", __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
if (0 < range.length) {
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
case __kCFArrayDeque:
objc_memmove_collectable(values, __CFArrayGetBucketsPtr(array) + range.location, range.length * sizeof(struct __CFArrayBucket));
break;
}
}
}
CF_EXPORT unsigned long _CFArrayFastEnumeration(CFArrayRef array, struct __objcFastEnumerationStateEquivalent *state, void *stackbuffer, unsigned long count) {
CHECK_FOR_MUTATION(array);
if (array->_count == 0) return 0;
enum { ATSTART = 0, ATEND = 1 };
switch (__CFArrayGetType(array)) {
case __kCFArrayImmutable:
if (state->state == ATSTART) { /* first time */
static const unsigned long const_mu = 1;
state->state = ATEND;
state->mutationsPtr = (unsigned long *)&const_mu;
state->itemsPtr = (unsigned long *)__CFArrayGetBucketsPtr(array);
return array->_count;
}
return 0;
case __kCFArrayDeque:
if (state->state == ATSTART) { /* first time */
state->state = ATEND;
state->mutationsPtr = (unsigned long *)&array->_mutations;
state->itemsPtr = (unsigned long *)__CFArrayGetBucketsPtr(array);
return array->_count;
}
return 0;
}
return 0;
}
void CFArrayApplyFunction(CFArrayRef array, CFRange range, CFArrayApplierFunction applier, void *context) {
CFIndex idx;
FAULT_CALLBACK((void **)&(applier));
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CFAssert1(NULL != applier, __kCFLogAssertion, "%s(): pointer to applier function may not be NULL", __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
for (idx = 0; idx < range.length; idx++) {
const void *item = CFArrayGetValueAtIndex(array, range.location + idx);
INVOKE_CALLBACK2(applier, item, context);
}
}
CFIndex CFArrayGetFirstIndexOfValue(CFArrayRef array, CFRange range, const void *value) {
CFIndex idx;
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
const CFArrayCallBacks *cb = CF_IS_OBJC(CFArrayGetTypeID(), array) ? &kCFTypeArrayCallBacks : __CFArrayGetCallBacks(array);
for (idx = 0; idx < range.length; idx++) {
const void *item = CFArrayGetValueAtIndex(array, range.location + idx);
if (value == item || (cb->equal && INVOKE_CALLBACK2(cb->equal, value, item)))
return idx + range.location;
}
return kCFNotFound;
}
CFIndex CFArrayGetLastIndexOfValue(CFArrayRef array, CFRange range, const void *value) {
CFIndex idx;
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
const CFArrayCallBacks *cb = CF_IS_OBJC(CFArrayGetTypeID(), array) ? &kCFTypeArrayCallBacks : __CFArrayGetCallBacks(array);
for (idx = range.length; idx--;) {
const void *item = CFArrayGetValueAtIndex(array, range.location + idx);
if (value == item || (cb->equal && INVOKE_CALLBACK2(cb->equal, value, item)))
return idx + range.location;
}
return kCFNotFound;
}
void CFArrayAppendValue(CFMutableArrayRef array, const void *value) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, addObject:(id)value);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
_CFArrayReplaceValues(array, CFRangeMake(__CFArrayGetCount(array), 0), &value, 1);
}
void CFArraySetValueAtIndex(CFMutableArrayRef array, CFIndex idx, const void *value) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, setObject:(id)value atIndex:(NSUInteger)idx);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CFAssert2(0 <= idx && idx <= __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index (%d) out of bounds", __PRETTY_FUNCTION__, idx);
CHECK_FOR_MUTATION(array);
if (idx == __CFArrayGetCount(array)) {
_CFArrayReplaceValues(array, CFRangeMake(idx, 0), &value, 1);
} else {
BEGIN_MUTATION(array);
const void *old_value;
const CFArrayCallBacks *cb = __CFArrayGetCallBacks(array);
CFAllocatorRef allocator = __CFGetAllocator(array);
struct __CFArrayBucket *bucket = __CFArrayGetBucketAtIndex(array, idx);
if (NULL != cb->retain && !hasBeenFinalized(array)) {
value = (void *)INVOKE_CALLBACK2(cb->retain, allocator, value);
}
old_value = bucket->_item;
__CFAssignWithWriteBarrier((void **)&bucket->_item, (void *)value); // GC: handles deque/CFStorage cases.
if (NULL != cb->release && !hasBeenFinalized(array)) {
INVOKE_CALLBACK2(cb->release, allocator, old_value);
}
array->_mutations++;
END_MUTATION(array);
}
}
void CFArrayInsertValueAtIndex(CFMutableArrayRef array, CFIndex idx, const void *value) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, insertObject:(id)value atIndex:(NSUInteger)idx);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CFAssert2(0 <= idx && idx <= __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index (%d) out of bounds", __PRETTY_FUNCTION__, idx);
CHECK_FOR_MUTATION(array);
_CFArrayReplaceValues(array, CFRangeMake(idx, 0), &value, 1);
}
// NB: AddressBook on the Phone is a fragile flower, so this function cannot do anything
// that causes the values to be retained or released.
void CFArrayExchangeValuesAtIndices(CFMutableArrayRef array, CFIndex idx1, CFIndex idx2) {
const void *tmp;
struct __CFArrayBucket *bucket1, *bucket2;
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, exchangeObjectAtIndex:(NSUInteger)idx1 withObjectAtIndex:(NSUInteger)idx2);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert2(0 <= idx1 && idx1 < __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index #1 (%d) out of bounds", __PRETTY_FUNCTION__, idx1);
CFAssert2(0 <= idx2 && idx2 < __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index #2 (%d) out of bounds", __PRETTY_FUNCTION__, idx2);
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
BEGIN_MUTATION(array);
bucket1 = __CFArrayGetBucketAtIndex(array, idx1);
bucket2 = __CFArrayGetBucketAtIndex(array, idx2);
tmp = bucket1->_item;
// XXX these aren't needed.
__CFAssignWithWriteBarrier((void **)&bucket1->_item, (void *)bucket2->_item);
__CFAssignWithWriteBarrier((void **)&bucket2->_item, (void *)tmp);
array->_mutations++;
END_MUTATION(array);
}
void CFArrayRemoveValueAtIndex(CFMutableArrayRef array, CFIndex idx) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, removeObjectAtIndex:(NSUInteger)idx);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CFAssert2(0 <= idx && idx < __CFArrayGetCount(array), __kCFLogAssertion, "%s(): index (%d) out of bounds", __PRETTY_FUNCTION__, idx);
CHECK_FOR_MUTATION(array);
_CFArrayReplaceValues(array, CFRangeMake(idx, 1), NULL, 0);
}
void CFArrayRemoveAllValues(CFMutableArrayRef array) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, removeAllObjects);
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CHECK_FOR_MUTATION(array);
BEGIN_MUTATION(array);
__CFArrayReleaseValues(array, CFRangeMake(0, __CFArrayGetCount(array)), true);
__CFArraySetCount(array, 0);
array->_mutations++;
END_MUTATION(array);
}
// may move deque storage, as it may need to grow deque
static void __CFArrayRepositionDequeRegions(CFMutableArrayRef array, CFRange range, CFIndex newCount) {
// newCount elements are going to replace the range, and the result will fit in the deque
struct __CFArrayDeque *deque = (struct __CFArrayDeque *)array->_store;
struct __CFArrayBucket *buckets;
CFIndex cnt, futureCnt, numNewElems;
CFIndex L, A, B, C, R;
buckets = (struct __CFArrayBucket *)((uint8_t *)deque + sizeof(struct __CFArrayDeque));
cnt = __CFArrayGetCount(array);
futureCnt = cnt - range.length + newCount;
L = deque->_leftIdx; // length of region to left of deque
A = range.location; // length of region in deque to left of replaced range
B = range.length; // length of replaced range
C = cnt - B - A; // length of region in deque to right of replaced range
R = deque->_capacity - cnt - L; // length of region to right of deque
numNewElems = newCount - B;
CFIndex wiggle = deque->_capacity >> 17;
if (wiggle < 4) wiggle = 4;
if (deque->_capacity < (uint32_t)futureCnt || (cnt < futureCnt && L + R < wiggle)) {
// must be inserting or space is tight, reallocate and re-center everything
CFIndex capacity = __CFArrayDequeRoundUpCapacity(futureCnt + wiggle);
CFIndex size = sizeof(struct __CFArrayDeque) + capacity * sizeof(struct __CFArrayBucket);
CFAllocatorRef allocator = __CFGetAllocator(array);
Boolean collectableMemory = CF_IS_COLLECTABLE_ALLOCATOR(allocator);
struct __CFArrayDeque *newDeque = (struct __CFArrayDeque *)CFAllocatorAllocate(allocator, size, isStrongMemory(array) ? __kCFAllocatorGCScannedMemory : 0);
if (__CFOASafe) __CFSetLastAllocationEventName(newDeque, "CFArray (store-deque)");
struct __CFArrayBucket *newBuckets = (struct __CFArrayBucket *)((uint8_t *)newDeque + sizeof(struct __CFArrayDeque));
CFIndex oldL = L;
CFIndex newL = (capacity - futureCnt) / 2;
CFIndex oldC0 = oldL + A + B;
CFIndex newC0 = newL + A + newCount;
newDeque->_leftIdx = newL;
newDeque->_capacity = capacity;
if (0 < A) objc_memmove_collectable(newBuckets + newL, buckets + oldL, A * sizeof(struct __CFArrayBucket));
if (0 < C) objc_memmove_collectable(newBuckets + newC0, buckets + oldC0, C * sizeof(struct __CFArrayBucket));
__CFAssignWithWriteBarrier((void **)&array->_store, (void *)newDeque);
if (!collectableMemory && deque) CFAllocatorDeallocate(allocator, deque);
if (CF_IS_COLLECTABLE_ALLOCATOR(allocator)) auto_zone_release(objc_collectableZone(), newDeque);
//printf("3: array %p store is now %p (%lx)\n", array, array->_store, *(unsigned long *)(array->_store));
return;
}
if ((numNewElems < 0 && C < A) || (numNewElems <= R && C < A)) { // move C
// deleting: C is smaller
// inserting: C is smaller and R has room
CFIndex oldC0 = L + A + B;
CFIndex newC0 = L + A + newCount;
if (0 < C) objc_memmove_collectable(buckets + newC0, buckets + oldC0, C * sizeof(struct __CFArrayBucket));
// GrP GC: zero-out newly exposed space on the right, if any
if (oldC0 > newC0) memset(buckets + newC0 + C, 0, (oldC0 - newC0) * sizeof(struct __CFArrayBucket));
} else if ((numNewElems < 0) || (numNewElems <= L && A <= C)) { // move A
// deleting: A is smaller or equal (covers remaining delete cases)
// inserting: A is smaller and L has room
CFIndex oldL = L;
CFIndex newL = L - numNewElems;
deque->_leftIdx = newL;
if (0 < A) objc_memmove_collectable(buckets + newL, buckets + oldL, A * sizeof(struct __CFArrayBucket));
// GrP GC: zero-out newly exposed space on the left, if any
if (newL > oldL) memset(buckets + oldL, 0, (newL - oldL) * sizeof(struct __CFArrayBucket));
} else {
// now, must be inserting, and either:
// A<=C, but L doesn't have room (R might have, but don't care)
// C<A, but R doesn't have room (L might have, but don't care)
// re-center everything
CFIndex oldL = L;
CFIndex newL = (L + R - numNewElems) / 2;
newL = newL - newL / 2;
CFIndex oldC0 = oldL + A + B;
CFIndex newC0 = newL + A + newCount;
deque->_leftIdx = newL;
if (newL < oldL) {
if (0 < A) objc_memmove_collectable(buckets + newL, buckets + oldL, A * sizeof(struct __CFArrayBucket));
if (0 < C) objc_memmove_collectable(buckets + newC0, buckets + oldC0, C * sizeof(struct __CFArrayBucket));
// GrP GC: zero-out newly exposed space on the right, if any
if (oldC0 > newC0) memset(buckets + newC0 + C, 0, (oldC0 - newC0) * sizeof(struct __CFArrayBucket));
} else {
if (0 < C) objc_memmove_collectable(buckets + newC0, buckets + oldC0, C * sizeof(struct __CFArrayBucket));
if (0 < A) objc_memmove_collectable(buckets + newL, buckets + oldL, A * sizeof(struct __CFArrayBucket));
// GrP GC: zero-out newly exposed space on the left, if any
if (newL > oldL) memset(buckets + oldL, 0, (newL - oldL) * sizeof(struct __CFArrayBucket));
}
}
}
static void __CFArrayHandleOutOfMemory(CFTypeRef obj, CFIndex numBytes) {
CFStringRef msg = CFStringCreateWithFormat(kCFAllocatorSystemDefault, NULL, CFSTR("Attempt to allocate %ld bytes for CFArray failed"), numBytes);
{
CFLog(kCFLogLevelCritical, CFSTR("%@"), msg);
HALT;
}
CFRelease(msg);
}
// This function is for Foundation's benefit; no one else should use it.
void _CFArraySetCapacity(CFMutableArrayRef array, CFIndex cap) {
if (CF_IS_OBJC(CFArrayGetTypeID(), array)) return;
__CFGenericValidateType(array, CFArrayGetTypeID());
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CFAssert3(__CFArrayGetCount(array) <= cap, __kCFLogAssertion, "%s(): desired capacity (%d) is less than count (%d)", __PRETTY_FUNCTION__, cap, __CFArrayGetCount(array));
CHECK_FOR_MUTATION(array);
BEGIN_MUTATION(array);
// Currently, attempting to set the capacity of an array which is the CFStorage
// variant, or set the capacity larger than __CF_MAX_BUCKETS_PER_DEQUE, has no
// effect. The primary purpose of this API is to help avoid a bunch of the
// resizes at the small capacities 4, 8, 16, etc.
if (__CFArrayGetType(array) == __kCFArrayDeque) {
struct __CFArrayDeque *deque = (struct __CFArrayDeque *)array->_store;
CFIndex capacity = __CFArrayDequeRoundUpCapacity(cap);
CFIndex size = sizeof(struct __CFArrayDeque) + capacity * sizeof(struct __CFArrayBucket);
CFAllocatorRef allocator = __CFGetAllocator(array);
Boolean collectableMemory = CF_IS_COLLECTABLE_ALLOCATOR(allocator);
if (NULL == deque) {
deque = (struct __CFArrayDeque *)CFAllocatorAllocate(allocator, size, isStrongMemory(array) ? __kCFAllocatorGCScannedMemory : 0);
if (NULL == deque) __CFArrayHandleOutOfMemory(array, size);
if (__CFOASafe) __CFSetLastAllocationEventName(deque, "CFArray (store-deque)");
deque->_leftIdx = capacity / 2;
} else {
struct __CFArrayDeque *olddeque = deque;
CFIndex oldcap = deque->_capacity;
deque = (struct __CFArrayDeque *)CFAllocatorAllocate(allocator, size, isStrongMemory(array) ? __kCFAllocatorGCScannedMemory : 0);
if (NULL == deque) __CFArrayHandleOutOfMemory(array, size);
objc_memmove_collectable(deque, olddeque, sizeof(struct __CFArrayDeque) + oldcap * sizeof(struct __CFArrayBucket));
if (!collectableMemory) CFAllocatorDeallocate(allocator, olddeque);
if (__CFOASafe) __CFSetLastAllocationEventName(deque, "CFArray (store-deque)");
}
deque->_capacity = capacity;
__CFAssignWithWriteBarrier((void **)&array->_store, (void *)deque);
if (collectableMemory) auto_zone_release(objc_collectableZone(), deque);
}
END_MUTATION(array);
}
void CFArrayReplaceValues(CFMutableArrayRef array, CFRange range, const void **newValues, CFIndex newCount) {
CF_OBJC_FUNCDISPATCHV(CFArrayGetTypeID(), void, (NSMutableArray *)array, replaceObjectsInRange:NSMakeRange(range.location, range.length) withObjects:(id *)newValues count:(NSUInteger)newCount);
__CFGenericValidateType(array, CFArrayGetTypeID());
__CFArrayValidateRange(array, range, __PRETTY_FUNCTION__);
CFAssert1(__CFArrayGetType(array) != __kCFArrayImmutable, __kCFLogAssertion, "%s(): array is immutable", __PRETTY_FUNCTION__);
CFAssert2(0 <= newCount, __kCFLogAssertion, "%s(): newCount (%d) cannot be less than zero", __PRETTY_FUNCTION__, newCount);
CHECK_FOR_MUTATION(array);
return _CFArrayReplaceValues(array, range, newValues, newCount);
}
// This function does no ObjC dispatch or argument checking;
// It should only be called from places where that dispatch and check has already been done, or NSCFArray
void _CFArrayReplaceValues(CFMutableArrayRef array, CFRange range, const void **newValues, CFIndex newCount) {
CHECK_FOR_MUTATION(array);
BEGIN_MUTATION(array);
const CFArrayCallBacks *cb;
CFIndex idx, cnt, futureCnt;
const void **newv, *buffer[256];
cnt = __CFArrayGetCount(array);
futureCnt = cnt - range.length + newCount;
CFAssert1(newCount <= futureCnt, __kCFLogAssertion, "%s(): internal error 1", __PRETTY_FUNCTION__);
cb = __CFArrayGetCallBacks(array);
CFAllocatorRef allocator = __CFGetAllocator(array);
/* Retain new values if needed, possibly allocating a temporary buffer for them */
if (NULL != cb->retain && !hasBeenFinalized(array)) {
newv = (newCount <= 256) ? (const void **)buffer : (const void **)CFAllocatorAllocate(kCFAllocatorSystemDefault, newCount * sizeof(void *), 0); // GC OK
if (newv != buffer && __CFOASafe) __CFSetLastAllocationEventName(newv, "CFArray (temp)");
for (idx = 0; idx < newCount; idx++) {
newv[idx] = (void *)INVOKE_CALLBACK2(cb->retain, allocator, (void *)newValues[idx]);
}
} else {
newv = newValues;
}
array->_mutations++;
/* Now, there are three regions of interest, each of which may be empty:
* A: the region from index 0 to one less than the range.location
* B: the region of the range
* C: the region from range.location + range.length to the end
* Note that index 0 is not necessarily at the lowest-address edge
* of the available storage. The values in region B need to get
* released, and the values in regions A and C (depending) need
* to get shifted if the number of new values is different from
* the length of the range being replaced.
*/
if (0 < range.length) {
__CFArrayReleaseValues(array, range, false);
}
// region B elements are now "dead"
if (0) {
} else if (NULL == array->_store) {
if (0) {
} else if (0 <= futureCnt) {
struct __CFArrayDeque *deque;
CFIndex capacity = __CFArrayDequeRoundUpCapacity(futureCnt);
CFIndex size = sizeof(struct __CFArrayDeque) + capacity * sizeof(struct __CFArrayBucket);
deque = (struct __CFArrayDeque *)CFAllocatorAllocate((allocator), size, isStrongMemory(array) ? __kCFAllocatorGCScannedMemory : 0);
if (__CFOASafe) __CFSetLastAllocationEventName(deque, "CFArray (store-deque)");
deque->_leftIdx = (capacity - newCount) / 2;
deque->_capacity = capacity;
__CFAssignWithWriteBarrier((void **)&array->_store, (void *)deque);
if (CF_IS_COLLECTABLE_ALLOCATOR(allocator)) auto_zone_release(objc_collectableZone(), deque); // GC: now safe to unroot the array body.
}
} else { // Deque
// reposition regions A and C for new region B elements in gap
if (0) {
} else if (range.length != newCount) {
__CFArrayRepositionDequeRegions(array, range, newCount);
}
}
// copy in new region B elements
if (0 < newCount) {
if (0) {
} else { // Deque
struct __CFArrayDeque *deque = (struct __CFArrayDeque *)array->_store;
struct __CFArrayBucket *raw_buckets = (struct __CFArrayBucket *)((uint8_t *)deque + sizeof(struct __CFArrayDeque));
objc_memmove_collectable(raw_buckets + deque->_leftIdx + range.location, newv, newCount * sizeof(struct __CFArrayBucket));
}
}
__CFArraySetCount(array, futureCnt);
if (newv != buffer && newv != newValues) CFAllocatorDeallocate(kCFAllocatorSystemDefault, newv);
END_MUTATION(array);
}
struct _acompareContext {
CFComparatorFunction func;