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
155
156
157
158
159
160
161
162
163
|
// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include "hydration.h"
#include <zencore/compactbinary.h>
#include <zenutil/zenserverprocess.h>
#include <atomic>
#include <filesystem>
namespace zen {
class WorkerThreadPool;
/**
* Storage Server Instance
*
* This class manages the lifecycle of a storage server instance, and
* provides functions to query its state. There should be one instance
* per module ID.
*/
class StorageServerInstance
{
public:
struct Configuration
{
uint16_t BasePort;
std::filesystem::path StateDir;
std::filesystem::path TempDir;
std::string HydrationTargetSpecification;
CbObject HydrationOptions;
uint32_t HttpThreadCount = 0; // Automatic
int CoreLimit = 0; // Automatic
std::filesystem::path ConfigPath;
std::string Malloc;
std::string Trace;
std::string TraceHost;
std::string TraceFile;
WorkerThreadPool* OptionalWorkerPool = nullptr;
};
StorageServerInstance(ZenServerEnvironment& RunEnvironment, const Configuration& Config, std::string_view ModuleId);
~StorageServerInstance();
inline std::string_view GetModuleId() const { return m_ModuleId; }
inline uint16_t GetBasePort() const { return m_Config.BasePort; }
ProcessMetrics GetProcessMetrics() const;
#if ZEN_PLATFORM_WINDOWS
void SetJobObject(JobObject* InJobObject) { m_JobObject = InJobObject; }
#endif
class SharedLockedPtr
{
public:
SharedLockedPtr(const SharedLockedPtr&) = delete;
SharedLockedPtr();
SharedLockedPtr(RwLock& Lock, StorageServerInstance* Instance, bool Wait);
SharedLockedPtr(SharedLockedPtr&& Rhs);
~SharedLockedPtr();
SharedLockedPtr& operator=(const SharedLockedPtr&) = delete;
SharedLockedPtr& operator =(SharedLockedPtr&& Rhs);
operator bool() const { return m_Instance != nullptr; }
std::string_view GetModuleId() const;
uint16_t GetBasePort() const
{
ZEN_ASSERT(m_Instance);
return m_Instance->GetBasePort();
}
bool IsRunning() const;
ProcessMetrics GetProcessMetrics() const
{
ZEN_ASSERT(m_Instance);
return m_Instance->GetProcessMetrics();
}
#if ZEN_WITH_TESTS
void TerminateForTesting() const; // kills the child process to simulate a crash
#endif
private:
RwLock* m_Lock = nullptr;
StorageServerInstance* m_Instance = nullptr;
};
[[nodiscard]] SharedLockedPtr LockShared(bool Wait) { return SharedLockedPtr(m_Lock, this, Wait); }
class ExclusiveLockedPtr
{
public:
ExclusiveLockedPtr(const ExclusiveLockedPtr&) = delete;
ExclusiveLockedPtr();
ExclusiveLockedPtr(RwLock& Lock, StorageServerInstance* Instance, bool Wait);
ExclusiveLockedPtr(ExclusiveLockedPtr&& Rhs);
~ExclusiveLockedPtr();
ExclusiveLockedPtr& operator=(const ExclusiveLockedPtr&) = delete;
ExclusiveLockedPtr& operator =(ExclusiveLockedPtr&& Rhs);
operator bool() const { return m_Instance != nullptr; }
std::string_view GetModuleId() const;
uint16_t GetBasePort() const
{
ZEN_ASSERT(m_Instance);
return m_Instance->GetBasePort();
}
bool IsRunning() const;
void Provision();
void Deprovision();
void Obliterate();
void Hibernate();
void Wake();
private:
RwLock* m_Lock = nullptr;
StorageServerInstance* m_Instance = nullptr;
};
[[nodiscard]] ExclusiveLockedPtr LockExclusive(bool Wait) { return ExclusiveLockedPtr(m_Lock, this, Wait); }
private:
void ProvisionLocked();
void DeprovisionLocked();
void ObliterateLocked();
void HibernateLocked();
void WakeLocked();
mutable RwLock m_Lock;
const Configuration m_Config;
std::string m_ModuleId;
ZenServerInstance m_ServerInstance;
CbObject m_HydrationState;
#if ZEN_PLATFORM_WINDOWS
JobObject* m_JobObject = nullptr;
#endif
void SpawnServerProcess();
void Hydrate();
void Dehydrate();
HydrationConfig MakeHydrationConfig(std::atomic<bool>& AbortFlag, std::atomic<bool>& PauseFlag);
friend class SharedLockedPtr;
friend class ExclusiveLockedPtr;
};
} // namespace zen
|