C ++：具有dllimport / dllexport的内联函数？ [英] C++ : inline functions with dllimport/dllexport?

问题描述

我创建一个DLL（例如CORE.DLL），我声明了以下类/函数：

I create a DLL (say CORE.DLL) ,I have classes/functions declared as follows:

#ifdef RINZOCORE_SHARED
#define RINZO_LIB __declspec(dllexport)
#else
#define RINZO_LIB __declspec(dllimport)
#endif

我用 dllexport宏定义了许多内联函数，

I have defined many inline functions with "dllexport" macro ,

class RINZO_LIB CVector
{

public:
    CVector();//!< default constructor
    ..
    real& x();//!< accessor for the x component (can be used as l-value too)
    real& y();//!< accessor for the y component (can be used as l-value too)
    real& z();//!< accessor for the z component (can be used as l-value too)
    CVector& operator=(const CVector& other);//!< the assignment
    CVector& operator+=(const CVector& other);//!< the sum & assign
    CVector& operator-=(const CVector& other);//!< the subtract & assign
    CVector& operator*=(const real& fact);//!< the short multiply by a scalar factor & assign
    CVector& operator/=(const real& fact);//!< the short divide by a scalar factor & assign
..
}

RINZO_LIB inline CVector& CVector::operator=(const CVector& other)
{
    //check for 'a=a' case
    if (this==&other) return *this;
    vec[0]=other.vec[0];
    vec[1]=other.vec[1];
    vec[2]=other.vec[2];
    return *this;
}

RINZO_LIB inline CVector& CVector::operator+=(const CVector& other)
{
    vec[0]+=other.vec[0];
    vec[1]+=other.vec[1];
    vec[2]+=other.vec[2];
    return *this;
}

RINZO_LIB inline CVector& CVector::operator-=(const CVector& other)
{
    vec[0]-=other.vec[0];
    vec[1]-=other.vec[1];
    vec[2]-=other.vec[2];
    return *this;
}

RINZO_LIB inline CVector& CVector::operator*=(const real& fact)
{
    vec[0]*=fact;
    vec[1]*=fact;
    vec[2]*=fact;
    return *this;
}

RINZO_LIB inline CVector& CVector::operator/=(const real& fact)
{
    assert(fabs(fact) >= epsilon);
    vec[0]/=fact;
    vec[1]/=fact;
    vec[2]/=fact;
    return *this;
}

但是当我使用此DLL（导入）时，会编译另一个DLL（例如PluginA。 DLL），它会产生以下编译错误：

but when I use this DLL (import) compile another DLL (say PluginA.DLL) it gives following compile errors :

Info: resolving std::cout  by linking to __imp___ZSt4cout (auto-import)
CMakeFiles\ContourViewer.dir/objects.a(RzStateDoAnimation.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/statemachine/RzStateDoAnimation.cpp:79: undefined reference to `operator!=(quaternion const&, quaternion const&)'
Info: resolving vtable for __cxxabiv1::__vmi_class_type_info by linking to __imp___ZTVN10__cxxabiv121__vmi_class_type_infoE (auto-import)
CMakeFiles\ContourViewer.dir/objects.a(RzStateDoAnimation.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/statemachine/RzStateDoAnimation.cpp:146: undefined reference to `operator==(quaternion const&, quaternion const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:159: undefined reference to `operator*(CVector const&, CVector const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:165: undefined reference to `operator^(CVector const&, CVector const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:168: undefined reference to `operator-(CVector const&, CVector const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:292: undefined reference to `operator*(CVector const&, CVector const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:292: undefined reference to `operator*(CVector const&, float const&)'
CMakeFiles\ContourViewer.dir/objects.a(BallController.cpp.obj):C:/svn/osaka3d/trunk/osaka3d/rinzo-platform/src/dlplugins/contourviewer/trackball/BallController.cpp:292: undefined reference to `operator-(CVector const&, CVector const&)'

关于如何将内联函数与dllexport / dllimport一起使用的任何技巧？

Any tips on how to use inline functions with dllexport/dllimport ?

推荐答案

注意：由于这是可接受的答案，因此无法删除。请考虑逻辑已删除。欢迎您对此投票。

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下面保留了历史记录的原始内容。

Original content preserved below for history.

内联和dllexport / dllimport不要混用。

Inline and dllexport/dllimport don't mix.

您要么

1. 内联函数，并针对使用它们的每个源文件分别对其进行编译；或


2. 将它们存储在库中，也就是说，仅将它们编译一次（导出），然后将程序的其余部分与该单个编译版本链接（导入）。

尝试同时执行这两个操作几乎没有意义。

There's little sense in trying to do both at the same time.

删除每个函数定义中的 inline 或 RINZO_LIB 都可以，并且都可以。

Remove either inline or RINZO_LIB from each function definition that have both, and you should be fine.

编辑：消除任何误解：可以 导出和导入内联函数，并且实际上只是将dllexport / dllimport放在声明应该起作用。

Edit To eliminate any misunderstanding: it is possible to export and import inline functions, and in fact simply placing a dllexport/dllimport on a declaration should just work.

这篇关于C ++：具有dllimport / dllexport的内联函数？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！