网站倒计时,岳阳网站搭建,网站建设制作细节,近期的新闻热点提供两种内存分配方式#xff1a;①简单指针#xff0c;②句柄#xff08;二级指针#xff09;#xff1b;官方文档建议使用前者。
// 简单指针
char *ptr;
ptr sysmem_newptr(2000);
post(I have a pointer %lx and it is %ld bytes in size,ptr, sysmem_p…提供两种内存分配方式①简单指针②句柄二级指针官方文档建议使用前者。
// 简单指针
char *ptr;
ptr sysmem_newptr(2000);
post(I have a pointer %lx and it is %ld bytes in size,ptr, sysmem_ptrsize(ptr));
ptr sysmem_resizeptrclear(ptr, 3000);
post(Now I have a pointer %lx and it is %ld bytes in size,ptr, sysmem_ptrsize(ptr));
sysmem_freeptr(ptr);// 句柄
char **hand;
hand sysmem_newhandle(2000);
post(I have a handle %lx and it is %ld bytes in size,hand, sysmem_handlesize(hand));
sysmem_resizehandle(hand, 3000);
post(Now the handle %lx is %ld bytes in size,hand, sysmem_ptrsize(hand));
sysmem_freehandle(hand); 简单使用示例
typedef struct _memAlloc {t_object ob;char* ptr; // 定义指针
} t_memAlloc;/* ..... */void memAlloc_free(t_memAlloc* x) {sysmem_freeptr(x-ptr); // 释放内存
}void* memAlloc_new(t_symbol* s, long argc, t_atom* argv) { t_memAlloc* x (t_memAlloc*)object_alloc(memAlloc_class);x-ptr sysmem_newptr(1024); // 分配内存post(%lx: %ld bytes, x-ptr, sysmem_ptrsize(x-ptr)); // 打印内存地址和内存大小return (x);
}
运行结果
