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
|
/**
* @file workqueue_test.cpp
* @author Nat Goodspeed
* @date 2021-10-07
* @brief Test for workqueue.
*
* $LicenseInfo:firstyear=2021&license=viewerlgpl$
* Copyright (c) 2021, Linden Research, Inc.
* $/LicenseInfo$
*/
// Precompiled header
#include "linden_common.h"
// associated header
#include "workqueue.h"
// STL headers
// std headers
#include <chrono>
#include <deque>
// external library headers
// other Linden headers
#include "../test/lltut.h"
#include "llcond.h"
#include "llstring.h"
#include "stringize.h"
using namespace LL;
using namespace std::literals::chrono_literals; // ms suffix
using namespace std::literals::string_literals; // s suffix
/*****************************************************************************
* TUT
*****************************************************************************/
namespace tut
{
struct workqueue_data
{
WorkQueue queue{"queue"};
};
typedef test_group<workqueue_data> workqueue_group;
typedef workqueue_group::object object;
workqueue_group workqueuegrp("workqueue");
template<> template<>
void object::test<1>()
{
set_test_name("name");
ensure_equals("didn't capture name", queue.getKey(), "queue");
ensure("not findable", WorkQueue::getInstance("queue") == queue.getWeak().lock());
WorkQueue q2;
ensure("has no name", LLStringUtil::startsWith(q2.getKey(), "WorkQueue"));
}
template<> template<>
void object::test<2>()
{
set_test_name("post");
bool wasRun{ false };
// We only get away with binding a simple bool because we're running
// the work on the same thread.
queue.post([&wasRun](){ wasRun = true; });
queue.close();
ensure("ran too soon", ! wasRun);
queue.runUntilClose();
ensure("didn't run", wasRun);
}
template<> template<>
void object::test<3>()
{
set_test_name("postEvery");
// record of runs
using Shared = std::deque<WorkQueue::TimePoint>;
// This is an example of how to share data between the originator of
// postEvery(work) and the work item itself, since usually a WorkQueue
// is used to dispatch work to a different thread. Neither of them
// should call any of LLCond's wait methods: you don't want to stall
// either the worker thread or the originating thread (conventionally
// main). Use LLCond or a subclass even if all you want to do is
// signal the work item that it can quit; consider LLOneShotCond.
LLCond<Shared> data;
auto start = WorkQueue::TimePoint::clock::now();
auto interval = 100ms;
queue.postEvery(
interval,
[&data, count = 0]
() mutable
{
// record the timestamp at which this instance is running
data.update_one(
[](Shared& data)
{
data.push_back(WorkQueue::TimePoint::clock::now());
});
// by the 3rd call, return false to stop
return (++count < 3);
});
// no convenient way to close() our queue while we've got a
// postEvery() running, so run until we think we should have exhausted
// the iterations
queue.runFor(10*interval);
// Take a copy of the captured deque.
Shared result = data.get();
ensure_equals("called wrong number of times", result.size(), 3);
// postEvery() assumes you want the first call to happen right away.
// Inject a fake start time that's (interval) earlier than that, to
// make our too early/too late tests uniform for all entries.
result.push_front(start - interval);
for (size_t i = 1; i < result.size(); ++i)
{
auto diff = (result[i] - result[i-1]);
try
{
ensure(STRINGIZE("call " << i << " too soon"), diff >= interval);
ensure(STRINGIZE("call " << i << " too late"), diff < interval*1.5);
}
catch (const tut::failure&)
{
auto interval_ms = interval / 1ms;
auto diff_ms = diff / 1ms;
std::cerr << "interval " << interval_ms
<< "ms; diff " << diff_ms << "ms" << std::endl;
throw;
}
}
}
template<> template<>
void object::test<4>()
{
set_test_name("postTo");
WorkQueue main("main");
auto qptr = WorkQueue::getInstance("queue");
int result = 0;
main.postTo(
qptr,
[](){ return 17; },
// Note that a postTo() *callback* can safely bind a reference to
// a variable on the invoking thread, because the callback is run
// on the invoking thread.
[&result](int i){ result = i; });
// this should post the callback to main
qptr->runOne();
// this should run the callback
main.runOne();
ensure_equals("failed to run int callback", result, 17);
std::string alpha;
// postTo() handles arbitrary return types
main.postTo(
qptr,
[](){ return "abc"s; },
[&alpha](const std::string& s){ alpha = s; });
qptr->runPending();
main.runPending();
ensure_equals("failed to run string callback", alpha, "abc");
}
} // namespace tut
|
