blob: 3bc668480054b0b358e74c580df3ee325b7518f1 (
plain)
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
|
#include <kapi/devices/power.hpp>
#include <kapi/devices.hpp>
#include <kstd/memory.hpp>
#include <kstd/print.hpp>
#include <kstd/result.hpp>
#include <kstd/vector.hpp>
#include <ranges>
namespace kapi::devices
{
namespace
{
auto resume_subtree(device & node) -> void;
// NOLINTNEXTLINE(misc-no-recursion)
auto suspend_subtree(device & node) -> kstd::result<void>
{
auto suspended_children = kstd::vector<kstd::shared_ptr<device>>{};
if (auto as_bus = node.facet<bus>())
{
for (auto const & child : as_bus->children())
{
auto result = suspend_subtree(*child);
if (!result)
{
for (auto const & already_suspended : std::views::reverse(suspended_children))
{
resume_subtree(*already_suspended);
}
return result;
}
suspended_children.push_back(child);
}
}
if (auto driver = node.bound_driver())
{
auto result = driver->suspend(node);
if (!result)
{
for (auto const & already_suspended : std::views::reverse(suspended_children))
{
resume_subtree(*already_suspended);
}
return result;
}
}
return kstd::success();
}
// NOLINTNEXTLINE(misc-no-recursion)
auto resume_subtree(device & node) -> void
{
if (auto driver = node.bound_driver())
{
auto result = driver->resume(node);
if (!result)
{
kstd::println(kstd::print_sink::stderr, "[OS:PM] failed to resume device '{}': {}", node.name(),
result.error().message());
}
}
if (auto as_bus = node.facet<bus>())
{
for (auto const & child : as_bus->children())
{
resume_subtree(*child);
}
}
}
} // namespace
auto suspend_tree(bus & root) -> kstd::result<void>
{
return suspend_subtree(root);
}
auto resume_tree(bus & root) -> void
{
resume_subtree(root);
}
} // namespace kapi::devices
|
