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 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory_coordinator/memory_consumer.h"
#include "base/check_op.h"
#include "base/memory_coordinator/memory_consumer_registry.h"
namespace base {
// MemoryConsumer ---------------------------------------------------
MemoryConsumer::MemoryConsumer() {
DETACH_FROM_SEQUENCE(sequence_checker_);
}
void MemoryConsumer::ReleaseMemory() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
OnReleaseMemory();
}
void MemoryConsumer::UpdateMemoryLimit(int percentage) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// The percentage can never be negative (but it can be higher than 100).
CHECK_GE(percentage, 0);
memory_limit_ = percentage;
OnUpdateMemoryLimit();
}
// MemoryConsumerRegistration ---------------------------------------
MemoryConsumerRegistration::MemoryConsumerRegistration(
std::string_view consumer_id,
MemoryConsumerTraits traits,
MemoryConsumer* consumer,
CheckUnregister check_unregister,
CheckRegistryExists check_registry_exists)
: consumer_id_(consumer_id),
consumer_(consumer),
check_unregister_(check_unregister),
registry_(MemoryConsumerRegistry::MaybeGet()) {
if (!registry_) {
CHECK_EQ(check_registry_exists, CheckRegistryExists::kDisabled)
<< ". The MemoryConsumerRegistry did not exist at the time this "
"MemoryConsumerRegistration was created.";
return;
}
registry_->AddDestructionObserver(PassKey(), this);
registry_->AddMemoryConsumer(consumer_id, traits, consumer_);
}
MemoryConsumerRegistration::~MemoryConsumerRegistration() {
if (registry_) {
registry_->RemoveMemoryConsumer(consumer_id_, consumer_);
registry_->RemoveDestructionObserver(PassKey(), this);
}
}
void MemoryConsumerRegistration::OnBeforeMemoryConsumerRegistryDestroyed() {
// If this function is called, this means that the registry is being destroyed
// before the unregistration. This is only acceptable if the check is
// disabled.
CHECK_EQ(check_unregister_, CheckUnregister::kDisabled)
<< ". The global MemoryConsumerRegistry was destroyed before this "
"MemoryConsumerRegistration was destroyed.";
registry_->RemoveMemoryConsumer(consumer_id_, consumer_);
registry_->RemoveDestructionObserver(PassKey(), this);
registry_ = nullptr;
}
} // namespace base
|
