165 lines
2.6 KiB
C++
165 lines
2.6 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2021 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#if __has_include(<linux/input-event-codes.h>)
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#include <linux/input-event-codes.h>
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#endif
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#ifndef EV_SND
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#define EV_SND 0
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#endif
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#ifndef SND_TONE
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#define SND_TONE 0
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#endif
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/// Event device file structure.
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struct ircd::beep::ctrl
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{
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struct timeval tv {0};
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uint16_t type {EV_SND};
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uint16_t code {SND_TONE};
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int32_t tone {0};
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};
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decltype(ircd::beep::fd_opts)
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ircd::beep::fd_opts
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{
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.mode = std::ios::out
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};
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decltype(ircd::beep::mutex)
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ircd::beep::mutex;
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decltype(ircd::beep::path)
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ircd::beep::path
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{
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{ "name", "ircd.beep.path" },
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{ "default", "/dev/input/by-path/platform-pcspkr-event-spkr" },
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};
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decltype(ircd::beep::debug)
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ircd::beep::debug
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{
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{ "name", "ircd.beep.debug" },
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{ "default", false },
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};
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/// Is another ircd::ctx currently beeping?
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bool
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ircd::beep::busy()
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noexcept
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{
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return mutex.locked();
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}
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/// Is beeping at all possible for this platform?
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bool
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ircd::beep::available()
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noexcept try
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{
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return path && fs::exists(path);
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}
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catch(const std::exception &e)
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{
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log::derror
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{
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"Failed to detect PC Speaker event availability :%s",
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e.what()
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};
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return false;
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}
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//
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// beep::beep
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//
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ircd::beep::beep(const float tone)
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try
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:lock
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{
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tone > 0.0f?
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std::unique_lock<ctx::mutex>{mutex}:
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std::unique_lock<ctx::mutex>{mutex, std::defer_lock}
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}
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,fd
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{
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tone > 0.0f?
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fs::fd{string_view{path}, fd_opts}:
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fs::fd{-1}
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}
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{
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if(!fd)
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return;
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beep::ctrl c;
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c.tone = tone;
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syscall(::write, int(fd), &c, sizeof(c));
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if(debug)
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log::debug
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{
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"PC Speaker audible tone active @ %-1.1f Hz",
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tone,
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};
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}
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catch(const std::exception &e)
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{
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log::error
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{
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"Failed to activate audible alarm :%s",
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e.what(),
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};
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throw;
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}
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ircd::beep::beep(beep &&other)
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noexcept
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:lock{std::move(other.lock)}
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,fd{std::move(other.fd)}
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{
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}
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ircd::beep &
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ircd::beep::operator=(beep &&other)
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noexcept
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{
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this->~beep();
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lock = std::move(other.lock);
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fd = std::move(other.fd);
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return *this;
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}
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ircd::beep::~beep()
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noexcept try
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{
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if(!fd)
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return;
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assert(mutex.locked());
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assert(this->lock.owns_lock());
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beep::ctrl c;
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c.tone = 0;
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syscall(::write, int(fd), &c, sizeof(c));
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}
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catch(const std::exception &e)
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{
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log::derror
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{
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"Failed to clear pcspkr event (%p)",
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this,
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};
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return;
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}
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