event/TimerEvent: add type alias for std::chrono::steady_clock::duration

src/lib/alsa/NonBlock.cxx

@@ -21,7 +21,7 @@
 #include "event/MultiSocketMonitor.hxx"
 #include "util/RuntimeError.hxx"
 
-std::chrono::steady_clock::duration
+Event::Duration
 AlsaNonBlockPcm::PrepareSockets(MultiSocketMonitor &m, snd_pcm_t *pcm)
 {
 	int count = snd_pcm_poll_descriptors_count(pcm);
@@ -45,7 +45,7 @@ AlsaNonBlockPcm::PrepareSockets(MultiSocketMonitor &m, snd_pcm_t *pcm)
 	}
 
 	m.ReplaceSocketList(pfds, count);
-	return std::chrono::steady_clock::duration(-1);
+	return Event::Duration(-1);
 }
 
 void
@@ -75,13 +75,13 @@ AlsaNonBlockPcm::DispatchSockets(MultiSocketMonitor &m,
 					 snd_strerror(-err));
 }
 
-std::chrono::steady_clock::duration
+Event::Duration
 AlsaNonBlockMixer::PrepareSockets(MultiSocketMonitor &m, snd_mixer_t *mixer) noexcept
 {
 	int count = snd_mixer_poll_descriptors_count(mixer);
 	if (count <= 0) {
 		m.ClearSocketList();
-		return std::chrono::steady_clock::duration(-1);
+		return Event::Duration(-1);
 	}
 
 	struct pollfd *pfds = pfd_buffer.Get(count);
@@ -91,7 +91,7 @@ AlsaNonBlockMixer::PrepareSockets(MultiSocketMonitor &m, snd_mixer_t *mixer) noe
 		count = 0;
 
 	m.ReplaceSocketList(pfds, count);
-	return std::chrono::steady_clock::duration(-1);
+	return Event::Duration(-1);
 }
 
 void

src/lib/alsa/NonBlock.hxx

@@ -20,12 +20,11 @@
 #ifndef MPD_ALSA_NON_BLOCK_HXX
 #define MPD_ALSA_NON_BLOCK_HXX
 
+#include "event/Chrono.hxx"
 #include "util/ReusableArray.hxx"
 
 #include <alsa/asoundlib.h>
 
-#include <chrono>
-
 class MultiSocketMonitor;
 
 /**
@@ -39,8 +38,8 @@ public:
 	/**
 	 * Throws on error.
 	 */
-	std::chrono::steady_clock::duration PrepareSockets(MultiSocketMonitor &m,
-							   snd_pcm_t *pcm);
+	Event::Duration PrepareSockets(MultiSocketMonitor &m,
+				       snd_pcm_t *pcm);
 
 	/**
 	 * Wrapper for snd_pcm_poll_descriptors_revents(), to be
@@ -59,8 +58,8 @@ class AlsaNonBlockMixer {
 	ReusableArray<pollfd> pfd_buffer;
 
 public:
-	std::chrono::steady_clock::duration PrepareSockets(MultiSocketMonitor &m,
-							   snd_mixer_t *mixer) noexcept;
+	Event::Duration PrepareSockets(MultiSocketMonitor &m,
+				       snd_mixer_t *mixer) noexcept;
 
 	/**
 	 * Wrapper for snd_mixer_poll_descriptors_revents(), to be

src/lib/nfs/Connection.cxx

@@ -37,7 +37,7 @@ extern "C" {
 #include <poll.h> /* for POLLIN, POLLOUT */
 #endif
 
-static constexpr std::chrono::steady_clock::duration NFS_MOUNT_TIMEOUT =
+static constexpr Event::Duration NFS_MOUNT_TIMEOUT =
 	std::chrono::minutes(1);
 
 inline void

src/lib/systemd/Watchdog.hxx

@@ -42,7 +42,7 @@ namespace Systemd {
 class Watchdog {
 	TimerEvent timer;
 
-	std::chrono::steady_clock::duration interval;
+	Event::Duration interval;
 
 public:
 	explicit Watchdog(EventLoop &_loop) noexcept;