C ++ sizeof类型在库和调用代码中有所不同 [英] C++ sizeof type different in library and calling code

问题描述

我在可可粉应用程序中使用C ++库.我从macOS应用程序C ++代码中调用C ++库代码.我遇到库中的客户端类返回的问题

I use C++ library in cocoa application. And I call C++ library code from macos application C++ code. I run into problem that Client class in library returns

sizeof Client 976

但是在Mac OS应用程序中我有

but in Mac OS application I have

sizeof Client 944

客户端类 https://github.com/eiskaltdcpp/eiskaltdcpp/blob/master/dcpp/Client.h

那是为什么?

推荐答案

在比较了客户端类之后，我去了它的父类，发现父类(扬声器)的一个成员(CriticalSection)引起了大小上的差异.

After comparetion of Client classes i went to it parent class and found that one member (CriticalSection) of parent class (Speaker) cause this difference of size.

在该文件的标题中，我发现由于未定义宏，Mac OS应用程序使用了此类的不同定义(CriticalSection)，这会导致大小差异.

In header of this file i found that because of not defined macros Mac OS application use different definition of this class(CriticalSection) which cause difference of size.

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