struct Block_byref_2 *copy2 = (struct Block_byref_2 *)(copy+1); copy2->byref_keep = src2-...>byref_keep; copy2->byref_destroy = src2->byref_destroy; if (src->flags & BLOCK_BYREF_LAYOUT_EXTENDED...3，在源码中，判断BLOCK_BYREF_HAS_COPY_DISPOSE符合之后还会进行byref_keep和byref_destroy的迁移： ?...byref_keep和byref_destroy是定义在Block_byref_2结构体中的： ?...byref_keep对应的就是__Block_byref_id_object_copy_131。
/* VT_BYREF|VT_I8 */ FLOAT * pfltVal; /* VT_BYREF|VT_R4 */.../* VT_BYREF|VT_DATE */ BSTR * pbstrVal; /* VT_BYREF|VT_BSTR */...ppdispVal; /* VT_BYREF|VT_DISPATCH */ SAFEARRAY ** pparray; /* VT_BYREF|...PVOID byref; /* Generic ByRef */ CHAR cVal;.../* VT_BYREF|VT_UI4 */ ULONGLONG * pullVal; /* VT_BYREF|VT_UI8 */
__Block_byref_age_0赋值 __isa指针 ：__Block_byref_age_0中也有isa指针也就是说__Block_byref_age_0本质也一个对象。...__flags ：0 __size ：sizeof(__Block_byref_age_0)即__Block_byref_age_0所占用的内存空间。...那么同样的当block内部捕获__block修饰的对象类型的变量时，__Block_byref_person_0结构体内部也会自动添加__Block_byref_id_object_copy和__Block_byref_id_object_dispose...__Block_byref_age_0结构体，堆中__Block_byref_age_0结构体内的__forwarding指针依然指向自己。..._0结构体声明 __attribute__((__blocks__(byref))) __Block_byref_person_0 person = { (void*)0, (__Block_byref_person
__isa指针 ：__Block_byref_age_0中也有isa指针也就是说__Block_byref_age_0本质也一个对象。...__flags ：0 __size ：sizeof(__Block_byref_age_0),即__Block_byref_age_0所占用的内存空间。...接着将__Block_byref_age_0结构体age存入__main_block_impl_0结构体中，并赋值给__Block_byref_age_0 *age; ?...那么同样的当block内部捕获__block修饰的对象类型的变量时，__Block_byref_person_0结构体内部也会自动添加__Block_byref_id_object_copy和__Block_byref_id_object_dispose...__Block_byref_age_0结构体，堆中__Block_byref_age_0结构体内的__forwarding指针依然指向自己。
))) __Block_byref_person_0 person = { (void*)0, (__Block_byref_person_0 *)&person..., 33554432, sizeof(__Block_byref_person_0), __Block_byref_id_object_copy..._0中 struct __Block_byref_person_0 { void *__isa; // isa __Block_byref_person_0 *__forwarding; //指向自己的指针...当block从栈copy到堆中 则指向堆中block的地址 int __flags; // 标记 int __size; // 大小 void (*__Block_byref_id_object_copy...)(void*, void*); // 当block被拷贝到堆中执行此方法 void (*__Block_byref_id_object_dispose)(void*); // 当block释放 执行这个方法
_0 a ={ void* 0, (__Block_byref_a_a *)&a, 0, sizeof(__Block_byref_a_0), 10}; __...main_block_impl_0(func_0,&DATA,&a,570425344); } struct __Block_byref_a_0{ void *isa; __Block_byref_a...*a; __main_block_impl_0(*fp,*desc,__Block_byref_a_0 *_a,flags ):a(a->__forwarding){ impl.isa...修饰的变量 *dest = _Block_byref_copy(object) QQ截图20201215071532.png } } _block_byref_copy..._block_byref_copy(*arg){ struct Block_byref *src = (struct Block_byref *) arg;三层拷贝 struct Block_byref
Block_layout 3.2 __block修饰后Block_byref模板 struct Block_byref { void *isa; struct Block_byref *...和 byref_destroy 函数 - 来处理里面持有对象的保持和销毁 struct Block_byref_2 { // requires BLOCK_BYREF_HAS_COPY_DISPOSE...内存拷贝 以及常规处理 static struct Block_byref *_Block_byref_copy(const void *arg) { struct Block_byref *..._2 *)(copy+1); copy2->byref_keep = src2->byref_keep; copy2->byref_destroy = src2...Block_byref_3 *src3 = (struct Block_byref_3 *)(src2+1); struct Block_byref_3 *copy3 =
我们可以先来看看test.cpp的部分实现: struct __Block_byref_b_0 { void *__isa; __Block_byref_b_0 *__forwarding; int...__flags; int __size; int b; }; struct __Block_byref_blockStr_1 { void *__isa; __Block_byref_blockStr...))) __Block_byref_b_0 b = {(void*)0,(__Block_byref_b_0 *)&b, 0, sizeof(__Block_byref_b_0), 20}; NSString...))) __Block_byref_blockStr_1 blockStr = {(void*)0,(__Block_byref_blockStr_1 *)&blockStr, 33554432, sizeof...(__Block_byref_blockStr_1), __Block_byref_id_object_copy_131, __Block_byref_id_object_dispose_131, str
对应于源码中的 __block int val = 1; __attribute__((__blocks__(byref))) __Block_byref_val_0 val = {(void*)0,(...结构体__Block_byref_val_0 __Block_byref_val_0也是一个结构体，该结构体包含如下5个成员变量： void *__isa; __Block_byref_val_0 *_...))) __Block_byref_val_0 val = {(void*)0,(__Block_byref_val_0 *)&val, 0, sizeof(__Block_byref_val_0),...))) __Block_byref_val_0 val = {(void*)0,(__Block_byref_val_0 *)&val, 0, sizeof(__Block_byref_val_0),...__cself->val->__forwarding是结构体__Block_byref_val_0中__Block_byref_val_0类型的成员变量__forwarding，__Block_byref_val
)))__Block_byref_a_0 a = { (void*)0,(__Block_byref_a_0*)&a, 0, sizeof(__Block_byref_a_0)};...)))__Block_byref_a_0 a = {(void*)0,(__Block_byref_a_0 *)&a, 0, sizeof(__Block_byref_a_0)};...; */ int size; void(*byref_keep)(struct Block_byref *dst, structBlock_byref *src); ...)))__Block_byref_a_0 a = {(void*)0,(__Block_byref_a_0 *)&a, 33554432, sizeof(__Block_byref_a_0), __Block_byref_id_object_copy...block this is wrong XXX copy->byref_keep =src->byref_keep; copy->byref_destroy =src->byref_destroy
_0 { void *__isa; __Block_byref_age_0 *__forwarding; int __flags; int __size; NSUInteger age; };..._0 *age; // by ref __main_block_impl_0(void *fp, struct __main_block_desc_0 *desc, __Block_byref_age...__main_block_impl_0*src) {_Block_object_assign((void*)&dst->age, (void*)src->age, 8/*BLOCK_FIELD_IS_BYREF.../* @autoreleasepool */ { __AtAutoreleasePool __autoreleasepool; __attribute__((__blocks__(byref...))) __Block_byref_age_0 age = {(void*)0,(__Block_byref_age_0 *)&age, 0, sizeof(__Block_byref_age_0),
… short * piVal; // VT_BYREF|VT_I2. long * plVal; // VT_BYREF|VT_I4. ...float * pfltVal; // VT_BYREF|VT_R4. double * pdblVal; // VT_BYREF|VT_R8. ...DATE * pdate; // VT_BYREF|VT_DATE. ...BSTR * pbstrVal; // VT_BYREF|VT_BSTR. }; }; 显然，VARIANT类型是一个C结构，它包含了一个类型成员vt、一些保留字节以及一个大的union类型
__main_block_impl_0 { struct __block_impl impl; struct __main_block_desc_0* Desc; __Block_byref_val_...))) __Block_byref_val_0 val = {(void*)0,(__Block_byref_val_0 *)&val, 0, sizeof(__Block_byref_val_0), ...其实结构体__Block_byref_val_0产生的实例就是我们使用__block修饰过的变量。...struct __Block_byref_val_0 { void *__isa; __Block_byref_val_0 *__forwarding; int __flags; int __size;...我们从上述被转化的代码中可以看出 Block 本身也一样被转换成了__main_block_impl_0结构体实例，该实例持有__Block_byref_val_0结构体实例的指针。
编译器会将 __block 修饰的变量包装成一个__Block_byref_age_0对象； 以上age = 20;的赋值过程为：通过 block 结构体里的（__Block_byref_age_0）类型的...age 指针，找到__Block_byref_age_0结构体的内存（即被 __block 包装成对象的内存），把__Block_byref_age_0结构体里的 age 变量的值改为20。...struct __Block_byref_age_0 { void *__isa; __Block_byref_age_0 *__forwarding; int __flags;...))) __Block_byref_age_0 age = {(void*)0,(__Block_byref_age_0 *)&age, 0, sizeof(__Block_byref_age_0),...void (*__Block_byref_id_object_copy)(void*, void*); // copy void (*__Block_byref_id_object_dispose
blobEntropy = DATA_BLOB(len(entropy), bufferEntropy) blobOut = DATA_BLOB() if CryptProtectData(byref...(blobIn), u"python_data", byref(blobEntropy), None, None, CRYPTPROTECT_UI_FORBIDDEN...blobEntropy = DATA_BLOB(len(entropy), bufferEntropy) blobOut = DATA_BLOB() if CryptUnprotectData(byref...(blobIn), None, byref(blobEntropy), None, None, CRYPTPROTECT_UI_FORBIDDEN..., byref(blobOut)): return getData(blobOut) else: return ""7、定义函数来加密和解密数据：def cryptData
lpSearchCondition As Long, _ ByVal dwSearchCondition As Long, _ ByRef lpGroupId...ByRef lpReserved As Long) As Long Private Declare Function DeleteUrlCacheGroup Lib "wininet.dll...Alias "FindFirstUrlCacheEntryA" ( _ ByVal lpszUrlSearchPattern As String, _ ByRef...lpFirstCacheEntryInfo As INTERNET_CACHE_ENTRY_INFO, _ ByRef lpdwFirstCacheEntryInfoBufferSize...lpNextCacheEntryInfo As INTERNET_CACHE_ENTRY_INFO, _ ByRef lpdwNextCacheEntryInfoBufferSize
我们来转换下源码，分析一下： struct __Block_byref_a_0 { void *__isa; __Block_byref_a_0 *__forwarding; int...))) __Block_byref_a_0 a = {(void*)0,(__Block_byref_a_0 *)&a, 0, sizeof(__Block_byref_a_0), 10}; _..._Block_byref_b_1 b = {(void*)0,(__Block_byref_b_1 *)&b, 0, sizeof(__Block_byref_b_1), 20}; void...__Block_byref_a_0、__Block_byref_b_1 类型的结构体声明如下： struct __Block_byref_a_0 { void *__isa; __Block_byref_a...(__Block_byref_a_0), 10 }; __Block_byref_b_1 b = { 0, &b, 0, sizeof(__Block_byref_b
压缩数据块使用2个byte存储了没有压缩过的数据的长度LEN，再用2个byte记录了LEN的补码NLEN，根据这个，解压代码如下： Private Function InflateNoCompression(ByRef...cpByte() As Byte, ByRef uncpByte() As Byte, ByRef bitIndex As Long, ByRef pUncp As Long) As Long
它通常会产生干扰代码，经常导致非默认的 ByRef 关键字被忽略。 此规则没有关联的代码样式选项。...示例 ' Code with violations Sub M(ByVal p1 As Integer, ByRef p2 As Integer) End Sub ' Fixed code Sub M(...p1 As Integer, ByRef p2 As Integer) End Sub 另请参阅 ByVal RemoveHandler 不必要的代码规则 代码样式规则参考
解压过程： '静态Huffman Private Function InflateByFixedHuffman(ByRef cpByte() As Byte, ByRef uncpByte() As Byte..., ByRef bitIndex As Long, ByRef pUncp As Long) Dim ilen As Long Dim iDistance As Long Dim
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