8 files changed, 199 insertions, 5 deletions
diff --git a/src/thread/Cond.hxx b/src/thread/Cond.hxx
index ed663dc9d..93d5deb74 100644
--- a/src/thread/Cond.hxx
+++ b/src/thread/Cond.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/src/thread/Id.hxx b/src/thread/Id.hxx
index fa1cf2cab..7b10de074 100644
--- a/src/thread/Id.hxx
+++ b/src/thread/Id.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/src/thread/Mutex.hxx b/src/thread/Mutex.hxx
index 4ed48c972..dbf3fb7fe 100644
--- a/src/thread/Mutex.hxx
+++ b/src/thread/Mutex.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/src/thread/Name.hxx b/src/thread/Name.hxx
new file mode 100644
index 000000000..f86fc6e42
--- /dev/null
+++ b/src/thread/Name.hxx
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_THREAD_NAME_HXX
+#define MPD_THREAD_NAME_HXX
+
+#ifdef HAVE_PTHREAD_SETNAME_NP
+#include <pthread.h>
+#include <stdio.h>
+#endif
+
+static inline void
+SetThreadName(const char *name)
+{
+#ifdef HAVE_PTHREAD_SETNAME_NP
+#ifdef __APPLE__
+	pthread_setname_np(name);
+#else
+	pthread_setname_np(pthread_self(), name);
+#endif
+#else
+	(void)name;
+#endif
+}
+
+template<typename... Args>
+static inline void
+FormatThreadName(const char *fmt, gcc_unused Args&&... args)
+{
+#ifdef HAVE_PTHREAD_SETNAME_NP
+	char buffer[16];
+	snprintf(buffer, sizeof(buffer), fmt, args...);
+	SetThreadName(buffer);
+#else
+	(void)fmt;
+#endif
+}
+
+#endif
diff --git a/src/thread/Slack.hxx b/src/thread/Slack.hxx
new file mode 100644
index 000000000..66b2254a4
--- /dev/null
+++ b/src/thread/Slack.hxx
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_THREAD_SLACK_HXX
+#define MPD_THREAD_SLACK_HXX
+
+#ifdef HAVE_PRCTL
+#include <sys/prctl.h>
+#endif
+
+/**
+ * Set the current thread's timer slack to the specified number of
+ * nanoseconds (requires Linux 2.6.28).  This allows the kernel to
+ * merge multiple wakeups, which is a trick to save energy.
+ */
+static inline void
+SetThreadTimerSlackNS(unsigned long slack_ns)
+{
+#if defined(HAVE_PRCTL) && defined(PR_SET_TIMERSLACK)
+	prctl(PR_SET_TIMERSLACK, slack_ns, 0, 0, 0);
+#else
+	(void)slack_ns;
+#endif
+}
+
+static inline void
+SetThreadTimerSlackUS(unsigned long slack_us)
+{
+	SetThreadTimerSlackNS(slack_us * 1000ul);
+}
+
+static inline void
+SetThreadTimerSlackMS(unsigned long slack_ms)
+{
+	SetThreadTimerSlackNS(slack_ms * 1000000ul);
+}
+
+#endif
diff --git a/src/thread/Thread.cxx b/src/thread/Thread.cxx
index 67bcf7184..9016680e4 100644
--- a/src/thread/Thread.cxx
+++ b/src/thread/Thread.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/src/thread/Thread.hxx b/src/thread/Thread.hxx
index d3bd75455..1b1bca0e8 100644
--- a/src/thread/Thread.hxx
+++ b/src/thread/Thread.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/src/thread/Util.hxx b/src/thread/Util.hxx
new file mode 100644
index 000000000..d71230c20
--- /dev/null
+++ b/src/thread/Util.hxx
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_THREAD_UTIL_HXX
+#define MPD_THREAD_UTIL_HXX
+
+#ifdef __linux__
+#include <sched.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#elif defined(WIN32)
+#include <windows.h>
+#endif
+
+#ifdef __linux__
+
+static int
+ioprio_set(int which, int who, int ioprio)
+{
+	return syscall(SYS_ioprio_set, which, who, ioprio);
+}
+
+static void
+ioprio_set_idle()
+{
+	static constexpr int _IOPRIO_WHO_PROCESS = 1;
+	static constexpr int _IOPRIO_CLASS_IDLE = 3;
+	static constexpr int _IOPRIO_CLASS_SHIFT = 13;
+	static constexpr int _IOPRIO_IDLE =
+		(_IOPRIO_CLASS_IDLE << _IOPRIO_CLASS_SHIFT) | 7;
+
+	ioprio_set(_IOPRIO_WHO_PROCESS, 0, _IOPRIO_IDLE);
+}
+
+#endif
+
+/**
+ * Lower the current thread's priority to "idle" (very low).
+ */
+static inline void
+SetThreadIdlePriority()
+{
+#ifdef __linux__
+#ifdef SCHED_IDLE
+	static struct sched_param sched_param;
+	sched_setscheduler(0, SCHED_IDLE, &sched_param);
+#endif
+
+	ioprio_set_idle();
+
+#elif defined(WIN32)
+	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_IDLE);
+#endif
+};
+
+/**
+ * Raise the current thread's priority to "real-time" (very high).
+ */
+static inline void
+SetThreadRealtime()
+{
+#ifdef __linux__
+	struct sched_param sched_param;
+	sched_param.sched_priority = 50;
+	sched_setscheduler(0, SCHED_FIFO|SCHED_RESET_ON_FORK, &sched_param);
+#endif
+};
+
+#endif