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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <map>
#include <algorithm>
#include <vector>
#include "common/common.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/thread.h"
namespace Kernel {
class Event : public Object {
public:
std::string GetTypeName() const override { return "Event"; }
std::string GetName() const override { return name; }
static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::Event; }
Kernel::HandleType GetHandleType() const override { return Kernel::HandleType::Event; }
ResetType intitial_reset_type; ///< ResetType specified at Event initialization
ResetType reset_type; ///< Current ResetType
bool locked; ///< Event signal wait
bool permanent_locked; ///< Hack - to set event permanent state (for easy passthrough)
std::vector<Handle> waiting_threads; ///< Threads that are waiting for the event
std::string name; ///< Name of event (optional)
ResultVal<bool> WaitSynchronization() override {
bool wait = locked;
if (locked) {
Handle thread = GetCurrentThreadHandle();
if (std::find(waiting_threads.begin(), waiting_threads.end(), thread) == waiting_threads.end()) {
waiting_threads.push_back(thread);
}
Kernel::WaitCurrentThread(WAITTYPE_EVENT, GetHandle());
}
if (reset_type != RESETTYPE_STICKY && !permanent_locked) {
locked = true;
}
return MakeResult<bool>(wait);
}
};
/**
* Hackish function to set an events permanent lock state, used to pass through synch blocks
* @param handle Handle to event to change
* @param permanent_locked Boolean permanent locked value to set event
* @return Result of operation, 0 on success, otherwise error code
*/
ResultCode SetPermanentLock(Handle handle, const bool permanent_locked) {
Event* evt = g_object_pool.Get<Event>(handle);
if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
evt->permanent_locked = permanent_locked;
return RESULT_SUCCESS;
}
/**
* Changes whether an event is locked or not
* @param handle Handle to event to change
* @param locked Boolean locked value to set event
* @return Result of operation, 0 on success, otherwise error code
*/
ResultCode SetEventLocked(const Handle handle, const bool locked) {
Event* evt = g_object_pool.Get<Event>(handle);
if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
if (!evt->permanent_locked) {
evt->locked = locked;
}
return RESULT_SUCCESS;
}
/**
* Signals an event
* @param handle Handle to event to signal
* @return Result of operation, 0 on success, otherwise error code
*/
ResultCode SignalEvent(const Handle handle) {
Event* evt = g_object_pool.Get<Event>(handle);
if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
// Resume threads waiting for event to signal
bool event_caught = false;
for (size_t i = 0; i < evt->waiting_threads.size(); ++i) {
ResumeThreadFromWait( evt->waiting_threads[i]);
// If any thread is signalled awake by this event, assume the event was "caught" and reset
// the event. This will result in the next thread waiting on the event to block. Otherwise,
// the event will not be reset, and the next thread to call WaitSynchronization on it will
// not block. Not sure if this is correct behavior, but it seems to work.
event_caught = true;
}
evt->waiting_threads.clear();
if (!evt->permanent_locked) {
evt->locked = event_caught;
}
return RESULT_SUCCESS;
}
/**
* Clears an event
* @param handle Handle to event to clear
* @return Result of operation, 0 on success, otherwise error code
*/
ResultCode ClearEvent(Handle handle) {
Event* evt = g_object_pool.Get<Event>(handle);
if (evt == nullptr) return InvalidHandle(ErrorModule::Kernel);
if (!evt->permanent_locked) {
evt->locked = true;
}
return RESULT_SUCCESS;
}
/**
* Creates an event
* @param handle Reference to handle for the newly created mutex
* @param reset_type ResetType describing how to create event
* @param name Optional name of event
* @return Newly created Event object
*/
Event* CreateEvent(Handle& handle, const ResetType reset_type, const std::string& name) {
Event* evt = new Event;
handle = Kernel::g_object_pool.Create(evt);
evt->locked = true;
evt->permanent_locked = false;
evt->reset_type = evt->intitial_reset_type = reset_type;
evt->name = name;
return evt;
}
/**
* Creates an event
* @param reset_type ResetType describing how to create event
* @param name Optional name of event
* @return Handle to newly created Event object
*/
Handle CreateEvent(const ResetType reset_type, const std::string& name) {
Handle handle;
Event* evt = CreateEvent(handle, reset_type, name);
return handle;
}
} // namespace
|
