Have a C shared library call a Matlab callback function

13 次查看（过去 30 天）
Alphonse12
Alphonse12 2018-4-5
Hello, I have a C shared library that I load in my Matlab script. One of the functions of that shared library allows to register a callback function. The shared library will then call-back the registered function if function handleCallback is called. My problem is, I don't know how to pass the Matlab function to my shared library. See function registerCallback in my code below:
Following is the shared library interface object:
classdef myInterfaceObject
properties
libName;
end
methods
%constructor
function obj = myInterfaceObject(libname)
obj.libName = libname;
if ~libisloaded(obj.libName)
loadlibrary(obj.libName,@mySharedLibraryProto);
end
end
%destructor
function delete(obj)
unloadlibrary(obj.libName);
end
%the callback function we want to be called by the c shared library
function myMatlabCallback(obj,data)
disp('Inside myMatlabCallback');
end
%function to register the callback function above
function registerCallback(obj)
fPtr = libpointer('voidPtr',@obj.masterCb);
calllib(obj.libName,'c_registerCallbackFunction',fPtr);
end
%function that will trigger the callback call
function handleCallback(obj)
calllib(obj.libName,'c_handleCallback');
end
end
end
Following is my proto file for the shared library:
function [methodinfo,structs,enuminfo,ThunkLibName]=mySharedLibraryProto
ival={cell(1,0)};
structs=[];
enuminfo=[];
fcnNum=1;
fcns=struct('name',ival,'calltype',ival,'LHS',ival,'RHS',ival,'alias',ival);
ThunkLibName=[];
fcns.name{fcnNum}='c_registerCallbackFunction';
fcns.calltype{fcnNum}='cdecl';
fcns.LHS{fcnNum}=[];
fcns.RHS{fcnNum}={'voidPtr'};
fcnNum=fcnNum+1;
fcns.name{fcnNum}='c_handleCallback';
fcns.calltype{fcnNum}='cdecl';
fcns.LHS{fcnNum}=[];
fcns.RHS{fcnNum}=[];
fcnNum=fcnNum+1;
methodinfo=fcns;
And following is my test script:
function test()
objectInstance=myInterfaceObject('mySharedLibrary');
objectInstance.registerCallback();
objectInstance.handleCallback();
objectInstance.delete();
end
Thanks for any help!

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Structures 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by