在C内存池的实现 [英] Memory pools implementation in C

问题描述

我要寻找一个在C良好的内存池的实现。

它应该包括以下内容：

1. 防碎片。


2. 是超级快：）


3. 能够捆绑，从不同规模划分几个在一些标识，并删除所有分配给定的标识符。


4. 线程安全

解决方案

我觉得优秀的 talloc ，发展成为桑巴舞的一部分，可能是你在找什么。我觉得最有趣的部分是从talloc返回的指针是一个有效的存储环境。他们的例子是：

 结构美孚* X = talloc（mem_ctx，结构foo的）;
X-＆GT;名称= talloc_strdup（X，富）;
// ...
talloc_free（X）; //释放内存为X和X-GT＆;名
 

在针对您的特定点：

（1）不知道什么防碎裂在这种情况下。在C你不会得到压缩反正垃圾收集，所以我觉得你的选择是比较有限的。

（2）通告比普通的要慢只有4％的malloc（3），这是相当快的。

（3）查看上面的例子。

（4）它是线程安全，只要不同的线程使用不同的上下文＆放大器;底层的malloc是线程安全的。

I am looking for a good memory pool implementation in C.

it should include the following:

1. Anti fragmentation.
2. Be super fast :)
3. Ability to "bundle" several allocations from different sizes under some identifier and delete all the allocations with the given identifier.
4. Thread safe

解决方案

I think the excellent talloc, developed as part of samba might be what you're looking for. The part I find most interesting is that any pointer returned from talloc is a valid memory context. Their example is:

struct foo *X = talloc(mem_ctx, struct foo);
X->name = talloc_strdup(X, "foo");
// ...
talloc_free(X); // frees memory for both X and X->name

In response to your particular points:

(1) Not sure what anti-fragmentation is in this case. In C you're not going to get compacting garbage collection anyway, so I think your choices are somewhat limited.

(2) It advertises being only 4% slower than plain malloc(3), which is quite fast.

(3) See example above.

(4) It is thread safe as long as different threads use different contexts & the underlying malloc is thread safe.

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