simple_test.m 源码
int main(int argc, const char * argv[])
{
@autoreleasepool {
void (^blockTest)(void) = ^{ printf("BlockTest\n"); };
blockTest();
}
return 0;
}
simple_test.cpp 编译后
说明此处只展示与BLock实现相关的重要代码，想看编译后完整内容，可以到Block项目中找simple_test.cpp即可
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) {
printf("BlockTest\n"); }
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[]) {
/* @autoreleasepool */ { __AtAutoreleasePool __autoreleasepool;
void (*blockTest)(void) = ((void (*)())&__main_block_impl_0((void *)__main_block_func_0, &__main_block_desc_0_DATA));
((void (*)(__block_impl *))((__block_impl *)blockTest)->FuncPtr)((__block_impl *)blockTest);
return 0;
}
return 0;
}
