blob: 42472425f393be35135721dbbca894f68843339e (
plain) (
blame)
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "pendinglidtracker.h"
#include <cassert>
namespace proton {
PendingLidTrackerBase::PendingLidTrackerBase() = default;
PendingLidTrackerBase::~PendingLidTrackerBase() = default;
ILidCommitState::State
PendingLidTrackerBase::waitState(State state, uint32_t lid) const {
MonitorGuard guard(_mutex);
return waitFor(guard, state, lid);
}
ILidCommitState::State
PendingLidTrackerBase::waitState(State state, const LidList & lids) const {
MonitorGuard guard(_mutex);
State lowest = State::COMPLETED;
for (uint32_t lid : lids) {
State next = waitFor(guard, state, lid);
if ((state == State::NEED_COMMIT) && next == state) {
return next;
}
lowest = std::min(next, lowest);
}
return lowest;
}
PendingLidTracker::PendingLidTracker() = default;
PendingLidTracker::~PendingLidTracker() {
assert(_pending.empty());
}
IPendingLidTracker::Token
PendingLidTracker::produce(uint32_t lid) {
std::lock_guard guard(_mutex);
_pending[lid]++;
return Token(lid, *this);
}
void
PendingLidTracker::consume(uint32_t lid) {
std::lock_guard guard(_mutex);
auto found = _pending.find(lid);
assert (found != _pending.end());
assert (found->second > 0);
if (found->second == 1) {
_pending.erase(found);
_cond.notify_all();
} else {
found->second--;
}
}
ILidCommitState::State
PendingLidTracker::waitFor(MonitorGuard & guard, State state, uint32_t lid) const {
for (auto found = _pending.find(lid); found != _pending.end(); found = _pending.find(lid)) {
if (state == State::NEED_COMMIT) {
return State::WAITING;
}
_cond.wait(guard);
}
return State::COMPLETED;
}
PendingLidTrackerBase::Snapshot
PendingLidTracker::produceSnapshot() {
return Snapshot();
}
}
|
