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#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#import "OFBlock.h"
#import "OFAllocFailedException.h"
#import "OFInitializationFailedException.h"
#if defined(OF_OBJFW_RUNTIME)
# import "runtime/private.h"
#endif
#ifdef OF_HAVE_ATOMIC_OPS
# import "atomic.h"
#endif
#ifdef OF_HAVE_THREADS
# import "mutex.h"
#endif
typedef struct of_block_byref_t of_block_byref_t;
struct of_block_byref_t {
Class isa;
of_block_byref_t *forwarding;
int flags;
int size;
void (*byref_keep)(void *dest, void *src);
void (*byref_dispose)(void *);
};
enum {
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#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#import "OFBlock.h"
#ifdef OF_HAVE_ATOMIC_OPS
# import "OFAtomic.h"
#endif
#ifdef OF_HAVE_THREADS
# import "OFPlainMutex.h"
#endif
#import "OFAllocFailedException.h"
#import "OFInitializationFailedException.h"
#if defined(OF_OBJFW_RUNTIME)
# import "runtime/private.h"
#endif
struct Block {
Class isa;
int flags;
int reserved;
void (*invoke)(void *block, ...);
struct {
unsigned long reserved;
unsigned long size;
void (*_Nullable copy_helper)(void *dest, void *src);
void (*_Nullable dispose_helper)(void *src);
const char *signature;
} *descriptor;
};
struct Byref {
Class isa;
struct Byref *forwarding;
int flags;
int size;
void (*byref_keep)(void *dest, void *src);
void (*byref_dispose)(void *);
};
enum {
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static struct objc_class _NSConcreteStackBlock_metaclass = {
Nil, Nil, "OFStackBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteStackBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteStackBlock = {
&_NSConcreteStackBlock_metaclass, (Class)(void *)"OFBlock",
"OFStackBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(of_block_literal_t),
NULL, NULL
};
static struct objc_class _NSConcreteGlobalBlock_metaclass = {
Nil, Nil, "OFGlobalBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteGlobalBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteGlobalBlock = {
&_NSConcreteGlobalBlock_metaclass, (Class)(void *)"OFBlock",
"OFGlobalBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(of_block_literal_t),
NULL, NULL
};
static struct objc_class _NSConcreteMallocBlock_metaclass = {
Nil, Nil, "OFMallocBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteMallocBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteMallocBlock = {
&_NSConcreteMallocBlock_metaclass, (Class)(void *)"OFBlock",
"OFMallocBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(of_block_literal_t),
NULL, NULL
};
static struct {
unsigned long unknown;
struct objc_selector *selectorRefs;
uint16_t classDefsCount, categoryDefsCount;
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static struct objc_class _NSConcreteStackBlock_metaclass = {
Nil, Nil, "OFStackBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteStackBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteStackBlock = {
&_NSConcreteStackBlock_metaclass, (Class)(void *)"OFBlock",
"OFStackBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(struct Block),
NULL, NULL
};
static struct objc_class _NSConcreteGlobalBlock_metaclass = {
Nil, Nil, "OFGlobalBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteGlobalBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteGlobalBlock = {
&_NSConcreteGlobalBlock_metaclass, (Class)(void *)"OFBlock",
"OFGlobalBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(struct Block),
NULL, NULL
};
static struct objc_class _NSConcreteMallocBlock_metaclass = {
Nil, Nil, "OFMallocBlock", 8, OBJC_CLASS_INFO_METACLASS,
sizeof(_NSConcreteMallocBlock_metaclass), NULL, NULL
};
struct objc_class _NSConcreteMallocBlock = {
&_NSConcreteMallocBlock_metaclass, (Class)(void *)"OFBlock",
"OFMallocBlock", 8, OBJC_CLASS_INFO_CLASS, sizeof(struct Block),
NULL, NULL
};
static struct {
unsigned long unknown;
struct objc_selector *selectorRefs;
uint16_t classDefsCount, categoryDefsCount;
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static struct {
Class isa;
} alloc_failed_exception;
#ifndef OF_HAVE_ATOMIC_OPS
# define NUM_SPINLOCKS 8 /* needs to be a power of 2 */
# define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1)
static of_spinlock_t blockSpinlocks[NUM_SPINLOCKS];
static of_spinlock_t byrefSpinlocks[NUM_SPINLOCKS];
#endif
void *
_Block_copy(const void *block_)
{
of_block_literal_t *block = (of_block_literal_t *)block_;
if ([(id)block isMemberOfClass: (Class)&_NSConcreteStackBlock]) {
of_block_literal_t *copy;
if ((copy = malloc(block->descriptor->size)) == NULL) {
alloc_failed_exception.isa =
[OFAllocFailedException class];
@throw (OFAllocFailedException *)
&alloc_failed_exception;
}
memcpy(copy, block, block->descriptor->size);
object_setClass((id)copy, (Class)&_NSConcreteMallocBlock);
copy->flags++;
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->copy_helper(copy, block);
return copy;
}
if ([(id)block isMemberOfClass: (Class)&_NSConcreteMallocBlock]) {
#ifdef OF_HAVE_ATOMIC_OPS
of_atomic_int_inc(&block->flags);
#else
unsigned hash = SPINLOCK_HASH(block);
OF_ENSURE(of_spinlock_lock(&blockSpinlocks[hash]) == 0);
block->flags++;
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
#endif
}
return block;
}
void
_Block_release(const void *block_)
{
of_block_literal_t *block = (of_block_literal_t *)block_;
if (object_getClass((id)block) != (Class)&_NSConcreteMallocBlock)
return;
#ifdef OF_HAVE_ATOMIC_OPS
if ((of_atomic_int_dec(&block->flags) & OF_BLOCK_REFCOUNT_MASK) == 0) {
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->dispose_helper(block);
free(block);
}
#else
unsigned hash = SPINLOCK_HASH(block);
OF_ENSURE(of_spinlock_lock(&blockSpinlocks[hash]) == 0);
if ((--block->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->dispose_helper(block);
free(block);
return;
}
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
#endif
}
void
_Block_object_assign(void *dst_, const void *src_, const int flags_)
{
int flags = flags_ & (OF_BLOCK_FIELD_IS_BLOCK |
OF_BLOCK_FIELD_IS_OBJECT | OF_BLOCK_FIELD_IS_BYREF);
if (src_ == NULL)
return;
switch (flags) {
case OF_BLOCK_FIELD_IS_BLOCK:
*(of_block_literal_t **)dst_ = _Block_copy(src_);
break;
case OF_BLOCK_FIELD_IS_OBJECT:
if (!(flags_ & OF_BLOCK_BYREF_CALLER))
*(id *)dst_ = [(id)src_ retain];
break;
case OF_BLOCK_FIELD_IS_BYREF:;
of_block_byref_t *src = (of_block_byref_t *)src_;
of_block_byref_t **dst = (of_block_byref_t **)dst_;
src = src->forwarding;
if ((src->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
if ((*dst = malloc(src->size)) == NULL) {
alloc_failed_exception.isa =
[OFAllocFailedException class];
@throw (OFAllocFailedException *)
&alloc_failed_exception;
}
memcpy(*dst, src, src->size);
(*dst)->flags =
((*dst)->flags & ~OF_BLOCK_REFCOUNT_MASK) | 1;
(*dst)->forwarding = *dst;
if (src->flags & OF_BLOCK_HAS_COPY_DISPOSE)
src->byref_keep(*dst, src);
#ifdef OF_HAVE_ATOMIC_OPS
if (!of_atomic_ptr_cmpswap((void **)&src->forwarding,
src, *dst)) {
src->byref_dispose(*dst);
free(*dst);
*dst = src->forwarding;
}
#else
unsigned hash = SPINLOCK_HASH(src);
OF_ENSURE(of_spinlock_lock(&byrefSpinlocks[hash]) == 0);
if (src->forwarding == src)
src->forwarding = *dst;
else {
src->byref_dispose(*dst);
free(*dst);
*dst = src->forwarding;
}
OF_ENSURE(
of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
#endif
} else
*dst = src;
#ifdef OF_HAVE_ATOMIC_OPS
of_atomic_int_inc(&(*dst)->flags);
#else
unsigned hash = SPINLOCK_HASH(*dst);
OF_ENSURE(of_spinlock_lock(&byrefSpinlocks[hash]) == 0);
(*dst)->flags++;
OF_ENSURE(of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
#endif
break;
}
}
void
_Block_object_dispose(const void *object_, const int flags_)
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static struct {
Class isa;
} alloc_failed_exception;
#ifndef OF_HAVE_ATOMIC_OPS
# define NUM_SPINLOCKS 8 /* needs to be a power of 2 */
# define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1)
static OFSpinlock blockSpinlocks[NUM_SPINLOCKS];
static OFSpinlock byrefSpinlocks[NUM_SPINLOCKS];
#endif
void *
_Block_copy(const void *block_)
{
struct Block *block = (struct Block *)block_;
if ([(id)block isMemberOfClass: (Class)&_NSConcreteStackBlock]) {
struct Block *copy;
if ((copy = malloc(block->descriptor->size)) == NULL) {
alloc_failed_exception.isa =
[OFAllocFailedException class];
@throw (OFAllocFailedException *)
&alloc_failed_exception;
}
memcpy(copy, block, block->descriptor->size);
object_setClass((id)copy, (Class)&_NSConcreteMallocBlock);
copy->flags++;
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->copy_helper(copy, block);
return copy;
}
if ([(id)block isMemberOfClass: (Class)&_NSConcreteMallocBlock]) {
#ifdef OF_HAVE_ATOMIC_OPS
OFAtomicIntIncrease(&block->flags);
#else
unsigned hash = SPINLOCK_HASH(block);
OFEnsure(OFSpinlockLock(&blockSpinlocks[hash]) == 0);
block->flags++;
OFEnsure(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
#endif
}
return block;
}
void
_Block_release(const void *block_)
{
struct Block *block = (struct Block *)block_;
if (object_getClass((id)block) != (Class)&_NSConcreteMallocBlock)
return;
#ifdef OF_HAVE_ATOMIC_OPS
if ((OFAtomicIntDecrease(&block->flags) &
OF_BLOCK_REFCOUNT_MASK) == 0) {
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->dispose_helper(block);
free(block);
}
#else
unsigned hash = SPINLOCK_HASH(block);
OFEnsure(OFSpinlockLock(&blockSpinlocks[hash]) == 0);
if ((--block->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
OFEnsure(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->dispose_helper(block);
free(block);
return;
}
OFEnsure(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
#endif
}
void
_Block_object_assign(void *dst_, const void *src_, const int flags_)
{
int flags = flags_ & (OF_BLOCK_FIELD_IS_BLOCK |
OF_BLOCK_FIELD_IS_OBJECT | OF_BLOCK_FIELD_IS_BYREF);
if (src_ == NULL)
return;
switch (flags) {
case OF_BLOCK_FIELD_IS_BLOCK:
*(struct Block **)dst_ = _Block_copy(src_);
break;
case OF_BLOCK_FIELD_IS_OBJECT:
if (!(flags_ & OF_BLOCK_BYREF_CALLER))
*(id *)dst_ = [(id)src_ retain];
break;
case OF_BLOCK_FIELD_IS_BYREF:;
struct Byref *src = (struct Byref *)src_;
struct Byref **dst = (struct Byref **)dst_;
src = src->forwarding;
if ((src->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
if ((*dst = malloc(src->size)) == NULL) {
alloc_failed_exception.isa =
[OFAllocFailedException class];
@throw (OFAllocFailedException *)
&alloc_failed_exception;
}
memcpy(*dst, src, src->size);
(*dst)->flags =
((*dst)->flags & ~OF_BLOCK_REFCOUNT_MASK) | 1;
(*dst)->forwarding = *dst;
if (src->flags & OF_BLOCK_HAS_COPY_DISPOSE)
src->byref_keep(*dst, src);
#ifdef OF_HAVE_ATOMIC_OPS
if (!OFAtomicPointerCompareAndSwap(
(void **)&src->forwarding, src, *dst)) {
src->byref_dispose(*dst);
free(*dst);
*dst = src->forwarding;
}
#else
unsigned hash = SPINLOCK_HASH(src);
OFEnsure(OFSpinlockLock(&byrefSpinlocks[hash]) == 0);
if (src->forwarding == src)
src->forwarding = *dst;
else {
src->byref_dispose(*dst);
free(*dst);
*dst = src->forwarding;
}
OFEnsure(OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
#endif
} else
*dst = src;
#ifdef OF_HAVE_ATOMIC_OPS
OFAtomicIntIncrease(&(*dst)->flags);
#else
unsigned hash = SPINLOCK_HASH(*dst);
OFEnsure(OFSpinlockLock(&byrefSpinlocks[hash]) == 0);
(*dst)->flags++;
OFEnsure(OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
#endif
break;
}
}
void
_Block_object_dispose(const void *object_, const int flags_)
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