boost :: object_pool是否同步？

Question

boost :: object_pool是否同步？

Answer 1

C++沒有指定有關線程安全的任何內容，所以如果沒有提及它，它可能不會處理線程。有時，Boost提供了可以在線程安全的東西，這不是其中之一。

在mutex中包裝訪問池。

Answer 2

boost::object_pool不同步用於同時訪問和釋放池中的對象。但如果你想同步池，singleton_pool從boost是一個。關於如何開始使用singleton_pool幾乎沒有限制，但它們非常公平並適用於所有應用程序。請參閱here和here的啓動文檔中的以下注釋。

Object Usage vs. Singleton Usage 

Object Usage is the method where each Pool is an object that may be created and destroyed. Destroying a Pool implicitly frees all chunks that have been allocated from it. 

Singleton Usage is the method where each Pool is an object with static duration; that is, it will not be destroyed until program exit. Pool objects with Singleton Usage may be shared; thus, Singleton Usage implies thread-safety as well. System memory allocated by Pool objects with Singleton Usage may be freed through release_memory or purge_memory. 

singleton_pool用途限制

Notes 

The underlying pool p referenced by the static functions in singleton_pool is actually declared in a way that it is: 

Thread-safe if there is only one thread running before main() begins and after main() ends -- all of the static functions of singleton_pool synchronize their access to p. 
Guaranteed to be constructed before it is used -- thus, the simple static object in the synopsis above would actually be an incorrect implementation. The actual implementation to guarantee this is considerably more complicated. 
Note that a different underlying pool p exists for each different set of template parameters, including implementation-specific ones.