Sebastian @ HfG
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#pragma once
|
|
#include <libremidi/backends/linux/dylib_loader.hpp>
|
|
#include <libremidi/backends/linux/helpers.hpp>
|
|
|
|
#include <libudev.h>
|
|
|
|
#include <cassert>
|
|
|
|
namespace libremidi
|
|
{
|
|
|
|
struct libudev
|
|
{
|
|
// Useful one-liner:
|
|
// nm -A * | grep ' udev_' | grep -v '@' | cut -f 2 -d 'U' | sort | uniq | sed 's/ udev_//'| awk ' { print "LIBREMIDI_SYMBOL_DEF(udev, "$1");" }'
|
|
|
|
explicit libudev()
|
|
: library{"libudev.so.1"}
|
|
{
|
|
if (!library)
|
|
{
|
|
available = false;
|
|
return;
|
|
}
|
|
|
|
LIBREMIDI_SYMBOL_INIT(udev, device_get_action)
|
|
LIBREMIDI_SYMBOL_INIT(udev, device_get_subsystem)
|
|
LIBREMIDI_SYMBOL_INIT(udev, device_unref)
|
|
LIBREMIDI_SYMBOL_INIT(udev, monitor_enable_receiving)
|
|
LIBREMIDI_SYMBOL_INIT(udev, monitor_get_fd)
|
|
LIBREMIDI_SYMBOL_INIT(udev, monitor_new_from_netlink)
|
|
LIBREMIDI_SYMBOL_INIT(udev, monitor_receive_device)
|
|
LIBREMIDI_SYMBOL_INIT(udev, monitor_unref)
|
|
LIBREMIDI_SYMBOL_INIT2(udev, new, create)
|
|
LIBREMIDI_SYMBOL_INIT(udev, unref)
|
|
}
|
|
|
|
static const libudev& instance()
|
|
{
|
|
static const libudev self;
|
|
return self;
|
|
}
|
|
|
|
dylib_loader library;
|
|
bool available{true};
|
|
|
|
LIBREMIDI_SYMBOL_DEF(udev, device_get_action)
|
|
LIBREMIDI_SYMBOL_DEF(udev, device_get_subsystem)
|
|
LIBREMIDI_SYMBOL_DEF(udev, device_unref)
|
|
LIBREMIDI_SYMBOL_DEF(udev, monitor_enable_receiving)
|
|
LIBREMIDI_SYMBOL_DEF(udev, monitor_get_fd)
|
|
LIBREMIDI_SYMBOL_DEF(udev, monitor_new_from_netlink)
|
|
LIBREMIDI_SYMBOL_DEF(udev, monitor_receive_device)
|
|
LIBREMIDI_SYMBOL_DEF(udev, monitor_unref)
|
|
LIBREMIDI_SYMBOL_DEF2(udev, new, create)
|
|
LIBREMIDI_SYMBOL_DEF(udev, unref)
|
|
};
|
|
|
|
struct udev_helper
|
|
{
|
|
udev_helper()
|
|
{
|
|
instance = udev.create();
|
|
assert(instance);
|
|
|
|
monitor = udev.monitor_new_from_netlink(instance, "udev");
|
|
assert(monitor);
|
|
udev.monitor_enable_receiving(monitor);
|
|
}
|
|
|
|
~udev_helper()
|
|
{
|
|
udev.monitor_unref(monitor);
|
|
udev.unref(instance);
|
|
}
|
|
|
|
udev_helper(const udev_helper&) = delete;
|
|
udev_helper(udev_helper&&) = delete;
|
|
udev_helper& operator=(const udev_helper&) = delete;
|
|
udev_helper& operator=(udev_helper&&) = delete;
|
|
|
|
operator pollfd() const noexcept
|
|
{
|
|
return {.fd = udev.monitor_get_fd(monitor), .events = POLLIN, .revents = 0};
|
|
}
|
|
|
|
const libudev& udev = libudev::instance();
|
|
struct udev* instance{};
|
|
udev_monitor* monitor{};
|
|
};
|
|
|
|
}
|