Alexander Tkachev 17eb5f9143 CLOUD: Add complex callbacks
Originally, I intended to add Storage API, StorageFile and StorageInfo
stubs. When I tried to implement a simple info() call, I ended up fixing
Request to contain some pointer field and all callbacks to have Request*
parameter. And, now I have to place callback pointer into Request. which
calls another callback.

And, eventually, these "simple" callbacks would again require another
pointer (to some caller class).
2016-08-24 16:07:55 +06:00

65 lines
1.9 KiB
C++

/* ScummVM - Graphic Adventure Engine
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#ifndef BACKENDS_NETWORKING_CURL_REQUEST_H
#define BACKENDS_NETWORKING_CURL_REQUEST_H
namespace Networking {
class Request {
protected:
typedef void(*Callback)(Request* request, void *result);
/**
* Callback, which should be called before Request returns true in handle().
* That's the way Requests pass the result to the code which asked to create this request.
*/
Callback _callback;
/**
* Pointer, which could be set by Request creating code. It might be accessed
* from this Request when callback is called, for example.
*/
void *_pointer;
public:
Request(Callback cb): _callback(cb) {};
virtual ~Request() {};
/**
* Method, which does actual work. Depends on what this Request is doing.
*
* @return true if request's work is complete and it may be removed from Storage's list
*/
virtual bool handle() = 0;
void setPointer(void *ptr) { _pointer = ptr; }
void *pointer() const { return _pointer; }
};
} //end of namespace Cloud
#endif