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我需要編寫一個具有將由C函數調用的回調的python調用。 C頭文件具有以下從結構字段Python的CTypes回調
...
typedef struct _myResponse {
char * data,
void (*setResponseFunc)(const char * const req, char ** dataptr);
} MyResponse_t
C庫調用像在C這個
void process(const char * const req , MyResponse_t *response) {
response->SetResponseFunc("some request", &response->data);
}
樣品回調實現回調的回調:
void SetResponse(const char *respData, char **dataptr) {
char *ptr = malloc(strlen(respData));
strcpy(ptr, respData);
*dataptr= ptr;
}
然後我用ctypesgen來生成python代碼。生成的文件包含以下內容:
agent.py:
def String:
...
class struct__myResponse(Structure):
pass
struct__myResponse.__slots__ = [
'data',
'SetResponseFunc',
]
struct__myResponse._fields_ = [
('data', String),
('SetResponseFunc', CFUNCTYPE(UNCHECKED(None), String, POINTER(String))),
]
這就是我試圖用它
CALLBACK_FUNC = CFUNCTYPE(c_agent.UNCHECKED(None), agent.String, POINTER(agent.String))
def PyCopyResponse(a,b):
print "XXXXXX" // here, I haven't tried to implement the proper code, just want to see if the callback is called from the C library
copy_response = CALLBACK_FUNC(PyCopyResponse)
調用它
agentResp = agent.MyResponse_t(None,copy_response)
agent.process("some value",agentResp)
我不看」我的python回調實現被調用。我已經驗證C庫正在適當地調用回調函數。任何人都可以幫忙嗎?