如何将 alchemy asm 声明的变量引用到 flash 中？

发布于 2024-10-27 13:45:40 字数 424 浏览 1 评论 0原文

我在 alchemy asm 中声明了一个变量：

asm("var buffer:Vector.<Number> = new Vector.<Number>(100, true);");

我可以用这样的数据填充它：

asm("buffer[%0] = %1;" : : "r"(index) : "r"(value));

我不知道如何将该 asm“缓冲区”变量的引用获取到动作脚本中。

（我确实想到了一种方法......我所做的是从炼金术asm中抛出“缓冲区”，然后在actionscript中捕获它，但不幸的是它似乎泄漏了大量内存）。

有更好的替代方法吗？

请注意，性能至关重要，使用默认的 Alchemy 编组速度太慢。

原文

i have a variable declared in alchemy asm:

asm("var buffer:Vector.<Number> = new Vector.<Number>(100, true);");

i can populate it with data like so:

asm("buffer[%0] = %1;" : : "r"(index) : "r"(value));

what i can't figure out is how to get a reference of that asm "buffer" variable into actionscript.

(i did think of one way... what i did was to throw the "buffer" from alchemy asm, and then catch it in actionscript, but unfortunately it seems to leak a lot of memory).

is there a better alternative to doing this?

please note that performance is critical, and using default alchemy marshaling is way too slow.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

无需解释 2024-11-03 13:45:40

asm 仅用于来回传递数字，这意味着我们必须使用 Alchemy 的内部 int 到对象映射。深入研究中间 AS3 代码（要查看它，请将 ACHACKS_TMPS 环境变量设置为“1”），似乎是 CTypemap.AS3ValType 执行映射。因此，您可以返回一个由 asm 创建的对象，如下所示：

static AS3_Val alc_return_obj(void *self, AS3_Val args) {

    int len= 100;

    // create custom data in AS3
    asm("var as3Buffer:Vector.<Number> = new Vector.<Number>(%0, true);" : : "r"(len));

    // populate the vector with multiples of pi (just for fun)
    for (int idx= 0; idx < len; idx++) {
        double value= 3.14159265 * idx;
        asm("as3Buffer[%0] = %1;" : : "r"(idx) , "r"(value));
    }

    // get a C reference to the AS3 object
    AS3_Val alcBuffer;
    asm("%0 CTypemap.AS3ValType.createC(as3Buffer)[0];" : "=r"(alcBuffer));

    return alcBuffer;    
}

注意：虽然这是有趣的黑客行为，但它可能不是解决此问题的最佳方法。这可能不是从 Alchemy 获取数据并存入 Flash 的最快方法。为此，我建议使用 ByteArray 将数据复制到 Alchemy 的 RAM 中或从 Alchemy 的 RAM 中复制出来。请参阅此SO问题了解该领域的一些技术。

asm is only for passing numbers back and forth, which means we'll have to use Alchemy's internal int-to-object mappings. Digging through the intermediate AS3 code (to see it, set the ACHACKS_TMPS environment variable to '1'), it seems that CTypemap.AS3ValType does the mapping. So you can return an asm-created object like this:

static AS3_Val alc_return_obj(void *self, AS3_Val args) {

    int len= 100;

    // create custom data in AS3
    asm("var as3Buffer:Vector.<Number> = new Vector.<Number>(%0, true);" : : "r"(len));

    // populate the vector with multiples of pi (just for fun)
    for (int idx= 0; idx < len; idx++) {
        double value= 3.14159265 * idx;
        asm("as3Buffer[%0] = %1;" : : "r"(idx) , "r"(value));
    }

    // get a C reference to the AS3 object
    AS3_Val alcBuffer;
    asm("%0 CTypemap.AS3ValType.createC(as3Buffer)[0];" : "=r"(alcBuffer));

    return alcBuffer;    
}

Note: While this is fun hackery, it might not be the best way to solve this problem. This is probably not the fastest way to get data out of Alchemy and into Flash. For that, I suggest using a ByteArray to copy data into and out of Alchemy's RAM. See this SO question for some techniques in that area.

回复收藏 0 原文

~没有更多了~