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
|
/**
* @file threadpool.cpp
* @author Nat Goodspeed
* @date 2021-10-21
* @brief Implementation for threadpool.
*
* $LicenseInfo:firstyear=2021&license=viewerlgpl$
* Copyright (c) 2021, Linden Research, Inc.
* $/LicenseInfo$
*/
// Precompiled header
#include "linden_common.h"
// associated header
#include "threadpool.h"
// STL headers
// std headers
// external library headers
// other Linden headers
#include "llerror.h"
#include "llevents.h"
#include "stringize.h"
LL::ThreadPool::ThreadPool(const std::string& name, size_t threads, size_t capacity, bool auto_shutdown):
super(name),
mQueue(name, capacity),
mName("ThreadPool:" + name),
mThreadCount(threads),
mAutomaticShutdown(auto_shutdown)
{}
void LL::ThreadPool::start()
{
for (size_t i = 0; i < mThreadCount; ++i)
{
std::string tname{ stringize(mName, ':', (i+1), '/', mThreadCount) };
mThreads.emplace_back(tname, [this, tname]()
{
LL_PROFILER_SET_THREAD_NAME(tname.c_str());
run(tname);
});
}
// Some threads might need to run longer than LLEventPumps
if (!mAutomaticShutdown)
{
return;
}
// Listen on "LLApp", and when the app is shutting down, close the queue
// and join the workers.
LLEventPumps::instance().obtain("LLApp").listen(
mName,
[this](const LLSD& stat)
{
std::string status(stat["status"]);
if (status != "running")
{
// viewer is starting shutdown -- proclaim the end is nigh!
LL_DEBUGS("ThreadPool") << mName << " saw " << status << LL_ENDL;
close();
}
return false;
});
}
LL::ThreadPool::~ThreadPool()
{
close();
}
void LL::ThreadPool::close()
{
if (! mQueue.isClosed())
{
LL_DEBUGS("ThreadPool") << mName << " closing queue and joining threads" << LL_ENDL;
mQueue.close();
for (auto& pair: mThreads)
{
LL_DEBUGS("ThreadPool") << mName << " waiting on thread " << pair.first << LL_ENDL;
pair.second.join();
}
LL_DEBUGS("ThreadPool") << mName << " shutdown complete" << LL_ENDL;
}
}
void LL::ThreadPool::run(const std::string& name)
{
LL_DEBUGS("ThreadPool") << name << " starting" << LL_ENDL;
run();
LL_DEBUGS("ThreadPool") << name << " stopping" << LL_ENDL;
}
void LL::ThreadPool::run()
{
mQueue.runUntilClose();
}
|
