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POPass a callback function from python to c using cython
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Id
17870301
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AcceptedAnswerId
17885523
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2
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0
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CreationDate
2013-07-25T23:09:44.233
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LastActivityDate
2013-07-29T04:25:10.083
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1313
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First off I want to say that I do not have the option to modify or even view the c source code so anything that involves modifying the c file will not be helpful. In VP.h: <pre><code>typedef enum VPEvent { ... EVENT_OBJECT_CLICK, ... } ... typedef void *VPInstance; typedef void(*VPEventHandler)(VPInstance); ... VPSDK_API VPInstance vp_create(void); ... VPSDK_API int vp_event_set(VPInstance instance, VPEvent eventname, VPEventHandler event); ... </code></pre> In VP.pyx: <pre><code>cdef extern from "VP.h": ... cdef enum VPEvent: ... VP_EVENT_OBJECT_CLICK, ... ... ctypedef void *VPInstance ctypedef void(*VPEventHandler)(VPInstance) ... VPInstance vp_create() ... int vp_event_set(VPInstance instance, VPEvent eventname, VPEventHandler event) ... ... EVENT_OBJECT_CLICK = VP_EVENT_OBJECT_CLICK ... cdef class create: cdef VPInstance instance def __init__(self): self.instance = vp_create() ... def event_set(self, eventname, event): return vp_event_set(self.instance, eventname, event) </code></pre> What I want to have In Python: <pre><code>import VP ... def click(bot): bot.say("Someone clicked something!") ... bot = VP.create() bot.event_set(VP.EVENT_OBJECT_CLICK, click) </code></pre> This is how you would do it in c: <pre><code>#include <VP.h> void click(VPInstance instance) { vp_say(instance, "Someone clicked something!"); } int main(int argc, char ** argv) { ... VPInstance instance; instance = vp_create(); ... vp_event_set(instance, VP_EVENT_OBJECT_CLICK, click) } </code></pre> However the problem is that when compiling VP.pyx I get <blockquote> Cannot convert Python object to 'VPEventHandler' </blockquote> As well, by default the callback is given a VPInstance pointer but I want to abstract this value into a class.
Tags
<python><c><callback><cython>
Title
Pass a callback function from python to c using cython
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1. PO
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1. USMetaDark
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1. PO
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2. PO
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1. VO
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 POPass a callback function from python to c using cython
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