StackOverflow2013

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10426986
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2012-05-03T07:30:53.703
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2012-05-03T07:30:53.703
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Here's the fully corrected C++ code : <pre><code>#define IMPLEMENT_API /* Will be compatible with Neko on desktop targets. */ #if defined(HX_WINDOWS) || defined(HX_MACOS) || defined(HX_LINUX) #define NEKO_COMPATIBLE #endif #include <hx/CFFI.h> #include <stdio.h> /* Your hello function. */ value hello(value h) { printf("%i\n", val_int(h)); return alloc_int(1); } DEFINE_PRIM(hello, 1); /* Main entry point. */ extern "C" void mylib_main() { // Initialization code goes here } DEFINE_ENTRY_POINT(mylib_main); </code></pre> What's important is that every value given as an argument to a primitive or returned by a primitive must be of the type <code>value</code>. That's why your parameter and return didn't work. <code>val_int</code> is used to convert a <code>value</code> into a native C type, so your printing code was correct. But your return was wrong : you can't return a C <code>int</code> type when the function expects you to return a <code>value</code> to Haxe. You need to create a new Haxe <code>Int</code> type and return it. This is done with the help of <code>alloc_int</code>. Here's the Haxe part of the code as a reference : <pre><code>class Main { static var hello = cpp.Lib.load("myLib", "hello", 1); static function main() { var myReturnedInt:Int = hello(1); } } </code></pre> A few helpful links : <ul> <li><a href="http://nekovm.org/doc/ffi">Neko C FFI</a></li> <li><a href="http://haxe.org/doc/neko/ffi">Neko FFI tutorial</a></li> <li><a href="http://haxe.org/doc/cpp/ffi">CPP FFI notes</a></li> </ul>
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1. PONeko Dlls in Haxe C++ target
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1. COcool. this is what i was looking for. you have given an expanded form of what Waneck has given. thanks
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2. COGreat answer! :)
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