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refactor(backlight): use concrete types for some helper functions 

This fixes linking of the best_device() function with 'mold' linker.
This commit is contained in:
Yaroslav Chvanov 2023-11-04 18:17:45 +03:00
parent 48ec834ec9
commit c420b40668
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GPG Key ID: CCF75EB2BBF8F69C
2 changed files with 63 additions and 73 deletions
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12
include/util/backlight_backend.hpp
View File

@ -20,7 +20,7 @@
std::scoped_lock<std::mutex> lock((backend).udev_thread_mutex_); \
__devices = (backend).devices_; \
} \
auto varname = (backend).best_device(__devices.cbegin(), __devices.cend(), preferred_device);
auto varname = (backend).best_device(__devices, preferred_device);
namespace waybar::util {
@ -61,16 +61,10 @@ class BacklightBackend {
void set_scaled_brightness(std::string preferred_device, int brightness);
int get_scaled_brightness(std::string preferred_device);
template <class ForwardIt, class Inserter>
static void upsert_device(ForwardIt first, ForwardIt last, Inserter inserter, udev_device *dev);
template <class ForwardIt, class Inserter>
static void enumerate_devices(ForwardIt first, ForwardIt last, Inserter inserter, udev *udev);
bool is_login_proxy_initialized() const { return static_cast<bool>(login_proxy_); }
template <class ForwardIt>
static const BacklightDevice *best_device(ForwardIt first, ForwardIt last, std::string_view);
static const BacklightDevice *best_device(const std::vector<BacklightDevice> &devices,
std::string_view);
std::vector<BacklightDevice> devices_;
std::mutex udev_thread_mutex_;

120
src/util/backlight_backend.cpp
View File

@ -73,6 +73,54 @@ void check_nn(const void *ptr, const char *message = "ptr was null") {
namespace waybar::util {
static void upsert_device(std::vector<BacklightDevice> &devices, udev_device *dev) {
const char *name = udev_device_get_sysname(dev);
check_nn(name);
const char *actual_brightness_attr =
strncmp(name, "amdgpu_bl", 9) == 0 || strcmp(name, "apple-panel-bl") == 0
? "brightness"
: "actual_brightness";
const char *actual = udev_device_get_sysattr_value(dev, actual_brightness_attr);
const char *max = udev_device_get_sysattr_value(dev, "max_brightness");
const char *power = udev_device_get_sysattr_value(dev, "bl_power");
auto found = std::find_if(devices.begin(), devices.end(), [name](const BacklightDevice &device) {
return device.name() == name;
});
if (found != devices.end()) {
if (actual != nullptr) {
found->set_actual(std::stoi(actual));
}
if (max != nullptr) {
found->set_max(std::stoi(max));
}
if (power != nullptr) {
found->set_powered(std::stoi(power) == 0);
}
} else {
const int actual_int = actual == nullptr ? 0 : std::stoi(actual);
const int max_int = max == nullptr ? 0 : std::stoi(max);
const bool power_bool = power == nullptr ? true : std::stoi(power) == 0;
devices.emplace_back(name, actual_int, max_int, power_bool);
}
}
static void enumerate_devices(std::vector<BacklightDevice> &devices, udev *udev) {
std::unique_ptr<udev_enumerate, UdevEnumerateDeleter> enumerate{udev_enumerate_new(udev)};
udev_enumerate_add_match_subsystem(enumerate.get(), "backlight");
udev_enumerate_scan_devices(enumerate.get());
udev_list_entry *enum_devices = udev_enumerate_get_list_entry(enumerate.get());
udev_list_entry *dev_list_entry;
udev_list_entry_foreach(dev_list_entry, enum_devices) {
const char *path = udev_list_entry_get_name(dev_list_entry);
std::unique_ptr<udev_device, UdevDeviceDeleter> dev{udev_device_new_from_syspath(udev, path)};
check_nn(dev.get(), "dev new failed");
upsert_device(devices, dev.get());
}
}
BacklightDevice::BacklightDevice(std::string name, int actual, int max, bool powered)
: name_(name), actual_(actual), max_(max), powered_(powered) {}
@ -95,8 +143,7 @@ BacklightBackend::BacklightBackend(std::chrono::milliseconds interval,
: on_updated_cb_(on_updated_cb), polling_interval_(interval), previous_best_({}) {
std::unique_ptr<udev, UdevDeleter> udev_check{udev_new()};
check_nn(udev_check.get(), "Udev check new failed");
enumerate_devices(devices_.begin(), devices_.end(), std::back_inserter(devices_),
udev_check.get());
enumerate_devices(devices_, udev_check.get());
if (devices_.empty()) {
throw std::runtime_error("No backlight found");
}
@ -145,12 +192,12 @@ BacklightBackend::BacklightBackend(std::chrono::milliseconds interval,
check_eq(event.data.fd, udev_fd, "unexpected udev fd");
std::unique_ptr<udev_device, UdevDeviceDeleter> dev{udev_monitor_receive_device(mon.get())};
check_nn(dev.get(), "epoll dev was null");
upsert_device(devices.begin(), devices.end(), std::back_inserter(devices), dev.get());
upsert_device(devices, dev.get());
}
// Refresh state if timed out
if (event_count == 0) {
enumerate_devices(devices.begin(), devices.end(), std::back_inserter(devices), udev.get());
enumerate_devices(devices, udev.get());
}
{
std::scoped_lock<std::mutex> lock(udev_thread_mutex_);
@ -161,19 +208,20 @@ BacklightBackend::BacklightBackend(std::chrono::milliseconds interval,
};
}
template <class ForwardIt>
const BacklightDevice *BacklightBackend::best_device(ForwardIt first, ForwardIt last,
const BacklightDevice *BacklightBackend::best_device(const std::vector<BacklightDevice> &devices,
std::string_view preferred_device) {
const auto found = std::find_if(
first, last, [preferred_device](const auto &dev) { return dev.name() == preferred_device; });
if (found != last) {
devices.begin(), devices.end(),
[preferred_device](const BacklightDevice &dev) { return dev.name() == preferred_device; });
if (found != devices.end()) {
return &(*found);
}
const auto max = std::max_element(
first, last, [](const auto &l, const auto &r) { return l.get_max() < r.get_max(); });
devices.begin(), devices.end(),
[](const BacklightDevice &l, const BacklightDevice &r) { return l.get_max() < r.get_max(); });
return max == last ? nullptr : &(*max);
return max == devices.end() ? nullptr : &(*max);
}
const BacklightDevice *BacklightBackend::get_previous_best_device() {
@ -233,56 +281,4 @@ int BacklightBackend::get_scaled_brightness(std::string preferred_device) {
return 0;
}
template <class ForwardIt, class Inserter>
void BacklightBackend::upsert_device(ForwardIt first, ForwardIt last, Inserter inserter,
udev_device *dev) {
const char *name = udev_device_get_sysname(dev);
check_nn(name);
const char *actual_brightness_attr =
strncmp(name, "amdgpu_bl", 9) == 0 || strcmp(name, "apple-panel-bl") == 0
? "brightness"
: "actual_brightness";
const char *actual = udev_device_get_sysattr_value(dev, actual_brightness_attr);
const char *max = udev_device_get_sysattr_value(dev, "max_brightness");
const char *power = udev_device_get_sysattr_value(dev, "bl_power");
auto found =
std::find_if(first, last, [name](const auto &device) { return device.name() == name; });
if (found != last) {
if (actual != nullptr) {
found->set_actual(std::stoi(actual));
}
if (max != nullptr) {
found->set_max(std::stoi(max));
}
if (power != nullptr) {
found->set_powered(std::stoi(power) == 0);
}
} else {
const int actual_int = actual == nullptr ? 0 : std::stoi(actual);
const int max_int = max == nullptr ? 0 : std::stoi(max);
const bool power_bool = power == nullptr ? true : std::stoi(power) == 0;
*inserter = BacklightDevice{name, actual_int, max_int, power_bool};
++inserter;
}
}
template <class ForwardIt, class Inserter>
void BacklightBackend::enumerate_devices(ForwardIt first, ForwardIt last, Inserter inserter,
udev *udev) {
std::unique_ptr<udev_enumerate, UdevEnumerateDeleter> enumerate{udev_enumerate_new(udev)};
udev_enumerate_add_match_subsystem(enumerate.get(), "backlight");
udev_enumerate_scan_devices(enumerate.get());
udev_list_entry *enum_devices = udev_enumerate_get_list_entry(enumerate.get());
udev_list_entry *dev_list_entry;
udev_list_entry_foreach(dev_list_entry, enum_devices) {
const char *path = udev_list_entry_get_name(dev_list_entry);
std::unique_ptr<udev_device, UdevDeviceDeleter> dev{udev_device_new_from_syspath(udev, path)};
check_nn(dev.get(), "dev new failed");
upsert_device(first, last, inserter, dev.get());
}
}
} // namespace waybar::util