[英]C++ to D interoperability
Since days im trying to call some D code from C++ (with an class/interface defined for C++ and D). 因为我试图从C ++调用一些D代码(带有为C ++和D定义的类/接口)。
the D code D代码
module BufferCppBinding;
extern (C++) void *createBufferCppBinding() {
BufferCppBinding ptr = new BufferCppBinding();
return cast(void*)ptr;
}
extern (C++) interface BufferCppBindingInterface {
void construct();
// ...
}
class BufferCppBinding : BufferCppBindingInterface {
public Buffer thisPtr;
public extern (C++) void construct() {
// doesn't do anything
}
}
the C++ code for declaring the type to C++ land: 用于将类型声明为C ++域的C ++代码:
class BufferCppBinding {
public:
virtual void construct();
};
for the initialisation of the D runtime i wrote a small function in D which does in D land: 为了初始化D运行时,我在D中编写了一个小函数,它在D land中执行:
extern (C++) void initDRuntime() nothrow{
try
{
Runtime.initialize();
//result = myWinMain(hInstance, hPrevInstance, lpCmdLine, iCmdShow);
//Runtime.terminate(&exceptionHandler);
}
catch (Throwable o)
{
//MessageBox(null, o.toString().toUTF16z, "Error", MB_OK | MB_ICONEXCLAMATION);
//result = 0;
}
}
usage (C++): usage(C ++):
BufferCppBinding *vertexBuffer = reinterpret_cast<BufferCppBinding*>(createBufferCppBinding());
// here happens the crash
vertexBuffer->construct();
I am compiling the code with g++ 5.2 and ldc2 and linking it with ldc2. 我正在使用g ++ 5.2和ldc2编译代码并将其与ldc2链接。
I just get a SIGSEGV. 我刚拿到一个SIGSEGV。
Returning pointers to C++ that point to the GC heap is a bad idea - use malloc
/ emplace
(or std.experimental.allocator.make) instead and call
free on the C++ side. That won't run destructors though, so maybe you want to expose a D function that calls
返回指向C ++是指向GC堆是一个坏主意-使用malloc
/ emplace
(或std.experimental.allocator.make) instead and call
自由on the C++ side. That won't run destructors though, so maybe you want to expose a D function that calls
on the C++ side. That won't run destructors though, so maybe you want to expose a D function that calls
destroy` as well. on the C++ side. That won't run destructors though, so maybe you want to expose a D function that calls
destroy` on the C++ side. That won't run destructors though, so maybe you want to expose a D function that calls
。
BTW, no need to return void*
and cast back - just return BufferCppBindingInterface
from createBufferCppBinding
. 顺便说一句,不需要返回void*
并BufferCppBindingInterface
createBufferCppBinding
- 只需从createBufferCppBinding
返回createBufferCppBinding
。
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