-
Notifications
You must be signed in to change notification settings - Fork 2
/
FalconCallback.h
85 lines (73 loc) · 3.25 KB
/
FalconCallback.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
/*
* Copyright (c) 2011 Joshua B. Leners (University of Texas at Austin).
* All rights reserved.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of Texas at Austin. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#ifndef _NTFA_FALCON_CLIENT_FALCONCALLBACK_H_
#define _NTFA_FALCON_CLIENT_FALCONCALLBACK_H_
#include <stdint.h>
#include <pthread.h>
#include <boost/smart_ptr.hpp>
#include <string>
#include <vector>
#include "common.h"
// For convenience
typedef std::string LayerId;
typedef std::vector<LayerId> LayerIdList;
// This is the raw function passed by the client
// handle is the fully qualified handle of the application for this
// callback
// client_data pointer to opaque data for use by the callback
// falcon_status indicates whether this was caused by a remote or local event
// if it is a remote event, it indicates the layer
// remote_status this is the status provided by the remote spy
typedef void(*falcon_callback_fn)(const LayerIdList& handle,
void* client_data,
uint32_t falcon_status,
uint32_t remote_status);
struct cb_package;
// FalconCallback wraps the raw function provided by a client into a curried
// function with some synchronization goodies:
// The () operator will only call the function f once per object, so the
// client is guaranteed exactly one callback per registration
class FalconCallback {
public:
FalconCallback(falcon_callback_fn f, const LayerIdList& h, void* cd,
bool repeatable=true) :
f_(f), h_(h), cd_(cd), repeatable_(repeatable), run_final_(false) {
CHECK(0 == pthread_mutex_init(&cb_lock_, NULL));
}
bool Reactivate(falcon_callback_fn f, void* client_data=NULL);
void Deactivate();
bool HasRunFinal();
~FalconCallback();
void operator() (const LayerId& lid, uint32_t falcon_status,
uint32_t remote_status);
void SetData(void* new_data);
private:
falcon_callback_fn f_;
const LayerIdList h_;
void* cd_;
pthread_mutex_t cb_lock_;
bool repeatable_;
bool run_final_;
uint32_t deferred_falcon_status_;
uint32_t deferred_remote_status_;
int deferred_index_;
// No copying, etc, etc...
FalconCallback& operator=(const FalconCallback&);
FalconCallback(FalconCallback&);
};
typedef boost::shared_ptr<FalconCallback> FalconCallbackPtr;
#endif // _NTFA_FALCON_CLIENT_FALCONCALLBACK_H_