struct __block_impl {
void *isa;
int Flags;
int Reserved;
void *FuncPtr;
};
struct __main_block_impl_0 {
struct __block_impl impl;
struct __main_block_desc_0* Desc;
__main_block_impl_0(void *fp, struct __main_block_desc_0 *desc, int flags=0) {
impl.isa = &_NSConcreteStackBlock;
impl.Flags = flags;
impl.FuncPtr = fp;
Desc = desc;
}
};
static void __main_block_func_0(struct __main_block_impl_0 *__cself) {
int i = 1911;
}
static struct __main_block_desc_0 {
size_t reserved;
size_t Block_size;
} __main_block_desc_0_DATA = { 0, sizeof(struct __main_block_impl_0)};
int main(int argc, const char * argv[])
{
void (*blk) (void) =
((void (*)())&__main_block_impl_0((void *)__main_block_func_0, &__main_block_desc_0_DATA));
((void (*)(__block_impl *))((__block_impl *)blk)->FuncPtr)((__block_impl *)blk);
//该源码将 __main_block_impl_0 结构体类型的自动变量,即让栈上生成的 __main_block_impl_0 结构体实例的指针，赋值给 __main_block_impl_0 结构体指针类型的变量blk;
struct __main_block_impl_0 tmp = __main_block_impl_0(__main_block_func_0,&__main_block_desc_0_DATA);
struct __main_block_impl_0 *blk = &tmp;
return 0;
}
static struct IMAGE_INFO { unsigned version; unsigned flag; } _OBJC_IMAGE_INFO = { 0, 2 };
2.3.1Block 的实现
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