dbus: move rtkit to module

Move the rtkit code to a module.
Make sure we don't need to include the dbus headers in the spa dbus
interface. This removes the dependency on dbus.

spa/include/spa/support/dbus.h

@@ -24,8 +24,6 @@
 extern "C" {
 #endif
 
-#include <dbus/dbus.h>
-
 #include <spa/support/loop.h>
 
 #define SPA_TYPE__DBus		SPA_TYPE_INTERFACE_BASE "DBus"
@@ -33,6 +31,12 @@ extern "C" {
 
 #define SPA_TYPE_DBUS__Connection	SPA_TYPE_DBUS_BASE "Connection"
 
+enum spa_dbus_type {
+	SPA_DBUS_TYPE_SESSION,	/**< The login session bus */
+	SPA_DBUS_TYPE_SYSTEM,	/**< The systemwide bus */
+	SPA_DBUS_TYPE_STARTER	/**< The bus that started us, if any */
+};
+
 struct spa_dbus_connection {
 #define SPA_VERSION_DBUS_CONNECTION	0
         uint32_t version;
@@ -40,9 +44,9 @@ struct spa_dbus_connection {
 	 * Get the DBusConnection from a wraper
 	 *
 	 * \param conn the spa_dbus_connection wrapper
-	 * \return a DBusConnection
+	 * \return a pointer of type DBusConnection
 	 */
-	DBusConnection *(*get) (struct spa_dbus_connection *conn);
+	void *(*get) (struct spa_dbus_connection *conn);
 	/**
 	 * Destroy a dbus connection wrapper
 	 *
@@ -69,13 +73,11 @@ struct spa_dbus {
 	 *
 	 * \param dbus the dbus manager
 	 * \param type the bus type to wrap
-	 * \param error location for the error
+	 * \param error location for the DBusError
-	 * \return a new dbus connection wrapper or NULL and \a error is
+	 * \return a new dbus connection wrapper or NULL on error
-	 *         set.
 	 */
 	struct spa_dbus_connection * (*get_connection) (struct spa_dbus *dbus,
-							DBusBusType type,
+							enum spa_dbus_type type);
-							DBusError *error);
 };
 
 #define spa_dbus_get_connection(d,...)	(d)->get_connection((d),__VA_ARGS__)

spa/plugins/bluez5/bluez5-monitor.c

@@ -27,6 +27,8 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#include <dbus/dbus.h>
+
 #include <spa/support/log.h>
 #include <spa/support/type-map.h>
 #include <spa/support/loop.h>
@@ -1187,7 +1189,6 @@ impl_init(const struct spa_handle_factory *factory,
 {
 	struct spa_bt_monitor *this;
 	uint32_t i;
-	DBusError err;
 
 	spa_return_val_if_fail(factory != NULL, -EINVAL);
 	spa_return_val_if_fail(handle != NULL, -EINVAL);
@@ -1215,11 +1216,9 @@ impl_init(const struct spa_handle_factory *factory,
 	}
 	init_type(&this->type, this->map);
 
-	dbus_error_init(&err);
+	this->dbus_connection = spa_dbus_get_connection(this->dbus, DBUS_BUS_SYSTEM);
-
-	this->dbus_connection = spa_dbus_get_connection(this->dbus, DBUS_BUS_SYSTEM, &err);
 	if (this->dbus_connection == NULL) {
-		spa_log_error(this->log, "no dbus connection: %s", err.message);
+		spa_log_error(this->log, "no dbus connection");
 		return -EIO;
 	}
 	this->conn = spa_dbus_connection_get(this->dbus_connection);

spa/plugins/support/dbus.c

@@ -25,6 +25,8 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+#include <dbus/dbus.h>
+
 #include <spa/support/type-map.h>
 #include <spa/support/log.h>
 #include <spa/support/plugin.h>
@@ -255,7 +257,7 @@ static void wakeup_main(void *userdata)
 	spa_loop_utils_enable_idle(impl->utils, this->dispatch_event, true);
 }
 
-static DBusConnection *
+static void *
 impl_connection_get(struct spa_dbus_connection *conn)
 {
 	struct connection *this = SPA_CONTAINER_OF(conn, struct connection, this);
@@ -286,18 +288,18 @@ static const struct spa_dbus_connection impl_connection = {
 
 static struct spa_dbus_connection *
 impl_get_connection(struct spa_dbus *dbus,
-		    DBusBusType type,
+		    enum spa_dbus_type type)
-		    DBusError *error)
 {
         struct impl *impl = SPA_CONTAINER_OF(dbus, struct impl, dbus);
 	struct connection *conn;
+        DBusError error;
 
-	dbus_error_init(error);
+	dbus_error_init(&error);
 
 	conn = calloc(1, sizeof(struct connection));
 	conn->this = impl_connection;
 	conn->impl = impl;
-	conn->conn = dbus_bus_get_private(type, error);
+	conn->conn = dbus_bus_get_private(type, &error);
 	if (conn->conn == NULL)
 		goto error;
 
@@ -317,6 +319,8 @@ impl_get_connection(struct spa_dbus *dbus,
 	return &conn->this;
 
       error:
+	spa_log_error(impl->log, "Failed to connect to system bus: %s", error.message);
+	dbus_error_free(&error);
 	free(conn);
 	return NULL;
 }

src/modules/meson.build

@@ -5,6 +5,7 @@ pipewire_module_c_args = [
   '-D_GNU_SOURCE',
 ]
 
+if dbus_dep.found()
 pipewire_module_flatpak = shared_library('pipewire-module-flatpak', [ 'module-flatpak.c' ],
   c_args : pipewire_module_c_args,
   include_directories : [configinc, spa_inc],
@@ -14,6 +15,16 @@ pipewire_module_flatpak = shared_library('pipewire-module-flatpak', [ 'module-fl
   dependencies : [dbus_dep, mathlib, dl_lib, pipewire_dep],
 )
 
+pipewire_module_rtkit = shared_library('pipewire-module-rtkit', [ 'module-rtkit.c' ],
+  c_args : pipewire_module_c_args,
+  include_directories : [configinc, spa_inc],
+  link_with : spalib,
+  install : true,
+  install_dir : modules_install_dir,
+  dependencies : [dbus_dep, mathlib, dl_lib, pipewire_dep],
+)
+endif
+
 pipewire_module_autolink = shared_library('pipewire-module-autolink', [ 'module-autolink.c' ],
   c_args : pipewire_module_c_args,
   include_directories : [configinc, spa_inc],

src/modules/module-flatpak.c

@@ -27,6 +27,8 @@
 
 #include "config.h"
 
+#include <dbus/dbus.h>
+
 #include <spa/support/dbus.h>
 
 #include "pipewire/core.h"
@@ -469,7 +471,6 @@ static int module_init(struct pw_module *module, struct pw_properties *propertie
 {
 	struct pw_core *core = pw_module_get_core(module);
 	struct impl *impl;
-	DBusError error;
 	struct spa_dbus *dbus;
 	const struct spa_support *support;
 	uint32_t n_support;
@@ -490,9 +491,7 @@ static int module_init(struct pw_module *module, struct pw_properties *propertie
 	impl->type = pw_core_get_type(core);
 	impl->properties = properties;
 
-	dbus_error_init(&error);
+	impl->conn = spa_dbus_get_connection(dbus, SPA_DBUS_TYPE_SESSION);
-
-	impl->conn = spa_dbus_get_connection(dbus, DBUS_BUS_SESSION, &error);
 	if (impl->conn == NULL)
 		goto error;
 
@@ -507,8 +506,7 @@ static int module_init(struct pw_module *module, struct pw_properties *propertie
 
       error:
 	free(impl);
-	pw_log_error("Failed to connect to system bus: %s", error.message);
+	pw_log_error("Failed to connect to system bus");
-	dbus_error_free(&error);
 	return -ENOMEM;
 }
 

src/modules/module-rtkit.c

@@ -1,5 +1,5 @@
 /* PipeWire
- * Copyright (C) 2015 Wim Taymans <wim.taymans@gmail.com>
+ * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -16,6 +16,42 @@
  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <sys/resource.h>
+#include <sys/eventfd.h>
+
+#include "config.h"
+
+#include <spa/support/dbus.h>
+
+#include "pipewire/core.h"
+#include "pipewire/interfaces.h"
+#include "pipewire/link.h"
+#include "pipewire/log.h"
+#include "pipewire/module.h"
+#include "pipewire/utils.h"
+
+struct impl {
+	struct pw_core *core;
+	struct pw_type *type;
+	struct pw_properties *properties;
+
+	struct spa_loop *loop;
+	struct spa_source source;
+
+	struct spa_hook module_listener;
+};
+
 /***
   Copyright 2009 Lennart Poettering
   Copyright 2010 David Henningsson <diwic@ubuntu.com>
@@ -41,15 +77,23 @@
   SOFTWARE.
 ***/
 
-#include <errno.h>
-#include <stdlib.h>
-#include <stdbool.h>
-
 #include <dbus/dbus.h>
 
-#include <pipewire/log.h>
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 
-#include "rtkit.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+#define RTKIT_SERVICE_NAME "org.freedesktop.RealtimeKit1"
+#define RTKIT_OBJECT_PATH "/org/freedesktop/RealtimeKit1"
 
 /** \cond */
 struct pw_rtkit_bus {
@@ -90,22 +134,6 @@ void pw_rtkit_bus_free(struct pw_rtkit_bus *system_bus)
 	free(system_bus);
 }
 
-#if defined(__linux__) && !defined(__ANDROID__)
-
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/syscall.h>
-
-
 static pid_t _gettid(void)
 {
 	return (pid_t) syscall(SYS_gettid);
@@ -349,31 +377,108 @@ int pw_rtkit_make_high_priority(struct pw_rtkit_bus *connection, pid_t thread, i
 	return ret;
 }
 
-#else
+static void module_destroy(void *data)
-
-int pw_rtkit_make_realtime(struct pw_rtkit_bus *connection, pid_t thread, int priority)
 {
-	return -ENOTSUP;
+	struct impl *impl = data;
+
+	spa_hook_remove(&impl->module_listener);
+
+	if (impl->properties)
+		pw_properties_free(impl->properties);
+
+	free(impl);
 }
 
-int pw_rtkit_make_high_priority(struct pw_rtkit_bus *connection, pid_t thread, int nice_level)
+static const struct pw_module_events module_events = {
+	PW_VERSION_MODULE_EVENTS,
+	.destroy = module_destroy,
+};
+
+static void idle_func(struct spa_source *source)
 {
-	return -ENOTSUP;
+	struct impl *impl = source->data;
+	struct sched_param sp;
+	struct pw_rtkit_bus *system_bus;
+	struct rlimit rl;
+	int r, rtprio;
+	long long rttime;
+	uint64_t count;
+
+	rtprio = 20;
+	rttime = 20000;
+
+	spa_zero(sp);
+	sp.sched_priority = rtprio;
+
+	if (pthread_setschedparam(pthread_self(), SCHED_OTHER | SCHED_RESET_ON_FORK, &sp) == 0) {
+		pw_log_debug("SCHED_OTHER|SCHED_RESET_ON_FORK worked.");
+		return;
+	}
+	system_bus = pw_rtkit_bus_get_system();
+
+	rl.rlim_cur = rl.rlim_max = rttime;
+	if ((r = setrlimit(RLIMIT_RTTIME, &rl)) < 0)
+		pw_log_debug("setrlimit() failed: %s", strerror(errno));
+
+	if (rttime >= 0) {
+		r = getrlimit(RLIMIT_RTTIME, &rl);
+		if (r >= 0 && (long long) rl.rlim_max > rttime) {
+			pw_log_debug("Clamping rlimit-rttime to %lld for RealtimeKit", rttime);
+			rl.rlim_cur = rl.rlim_max = rttime;
+
+			if ((r = setrlimit(RLIMIT_RTTIME, &rl)) < 0)
+				pw_log_debug("setrlimit() failed: %s", strerror(errno));
+		}
+	}
+
+	if ((r = pw_rtkit_make_realtime(system_bus, 0, rtprio)) < 0) {
+		pw_log_debug("could not make thread realtime: %s", strerror(r));
+	} else {
+		pw_log_debug("thread made realtime");
+	}
+	pw_rtkit_bus_free(system_bus);
+
+	read(impl->source.fd, &count, sizeof(uint64_t));
 }
 
-int pw_rtkit_get_max_realtime_priority(struct pw_rtkit_bus *connection)
+static int module_init(struct pw_module *module, struct pw_properties *properties)
 {
+	struct pw_core *core = pw_module_get_core(module);
+	struct impl *impl;
+	struct spa_loop *loop;
+	const struct spa_support *support;
+	uint32_t n_support;
+
+	support = pw_core_get_support(core, &n_support);
+
+	loop = spa_support_find(support, n_support, SPA_TYPE_LOOP__DataLoop);
+        if (loop == NULL)
                 return -ENOTSUP;
+
+	impl = calloc(1, sizeof(struct impl));
+	if (impl == NULL)
+		return -ENOMEM;
+
+	pw_log_debug("module %p: new", impl);
+
+	impl->core = core;
+	impl->type = pw_core_get_type(core);
+	impl->properties = properties;
+	impl->loop = loop;
+
+	impl->source.loop = loop;
+	impl->source.func = idle_func;
+	impl->source.data = impl;
+	impl->source.fd = eventfd(1, EFD_CLOEXEC | EFD_NONBLOCK);
+	impl->source.mask = SPA_IO_IN;
+	spa_loop_add_source(impl->loop, &impl->source);
+
+	pw_module_add_listener(module, &impl->module_listener, &module_events, impl);
+
+	return 0;
 }
 
-int pw_rtkit_get_min_nice_level(struct pw_rtkit_bus *connection, int *min_nice_level)
+int pipewire__module_init(struct pw_module *module, const char *args)
 {
-	return -ENOTSUP;
+	return module_init(module, NULL);
 }
-
-long long pw_rtkit_get_rttime_usec_max(struct pw_rtkit_bus *connection)
-{
-	return -ENOTSUP;
-}
-
-#endif

src/pipewire/data-loop.c

@@ -22,60 +22,14 @@
 #include <sys/resource.h>
 
 #include "pipewire/log.h"
-#include "pipewire/rtkit.h"
 #include "pipewire/data-loop.h"
 #include "pipewire/private.h"
 
-static void make_realtime(struct pw_data_loop *this)
-{
-	struct sched_param sp;
-	struct pw_rtkit_bus *system_bus;
-	struct rlimit rl;
-	int r, rtprio;
-	long long rttime;
-
-	rtprio = 20;
-	rttime = 20000;
-
-	spa_zero(sp);
-	sp.sched_priority = rtprio;
-
-	if (pthread_setschedparam(pthread_self(), SCHED_OTHER | SCHED_RESET_ON_FORK, &sp) == 0) {
-		pw_log_debug("SCHED_OTHER|SCHED_RESET_ON_FORK worked.");
-		return;
-	}
-	system_bus = pw_rtkit_bus_get_system();
-
-	rl.rlim_cur = rl.rlim_max = rttime;
-	if ((r = setrlimit(RLIMIT_RTTIME, &rl)) < 0)
-		pw_log_debug("setrlimit() failed: %s", strerror(errno));
-
-	if (rttime >= 0) {
-		r = getrlimit(RLIMIT_RTTIME, &rl);
-		if (r >= 0 && (long long) rl.rlim_max > rttime) {
-			pw_log_debug("Clamping rlimit-rttime to %lld for RealtimeKit", rttime);
-			rl.rlim_cur = rl.rlim_max = rttime;
-
-			if ((r = setrlimit(RLIMIT_RTTIME, &rl)) < 0)
-				pw_log_debug("setrlimit() failed: %s", strerror(errno));
-		}
-	}
-
-	if ((r = pw_rtkit_make_realtime(system_bus, 0, rtprio)) < 0) {
-		pw_log_debug("could not make thread realtime: %s", strerror(r));
-	} else {
-		pw_log_debug("thread made realtime");
-	}
-	pw_rtkit_bus_free(system_bus);
-}
-
 static void *do_loop(void *user_data)
 {
 	struct pw_data_loop *this = user_data;
 	int res;
 
-	make_realtime(this);
-
 	pw_log_debug("data-loop %p: enter thread", this);
 	pw_loop_enter(this->loop);
 

src/pipewire/meson.build

@@ -24,7 +24,6 @@ pipewire_headers = [
   'proxy.h',
   'remote.h',
   'resource.h',
-  'rtkit.h',
   'stream.h',
   'thread-loop.h',
   'type.h',
@@ -56,7 +55,6 @@ pipewire_sources = [
   'remote.c',
   'resource.c',
   'stream.c',
-  'rtkit.c',
   'thread-loop.c',
   'type.c',
   'utils.c',
@@ -78,7 +76,7 @@ libpipewire = shared_library('pipewire-@0@'.format(apiversion), pipewire_sources
   include_directories : [pipewire_inc, configinc, spa_inc],
   link_with : spalib,
   install : true,
-  dependencies : [dbus_dep, dl_lib, mathlib, pthread_lib],
+  dependencies : [dl_lib, mathlib, pthread_lib],
 )
 
 pipewire_dep = declare_dependency(link_with : libpipewire,

src/pipewire/rtkit.h

@@ -1,93 +0,0 @@
-/* PipeWire
- * Copyright (C) 2015 Wim Taymans <wim.taymans@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#ifndef __PIPEWIRE_RTKIT_H__
-#define __PIPEWIRE_RTKIT_H__
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define RTKIT_SERVICE_NAME "org.freedesktop.RealtimeKit1"
-#define RTKIT_OBJECT_PATH "/org/freedesktop/RealtimeKit1"
-
-/** \class pw_rtkit
- *
- * RTKit helpers
- */
-/** Get an RTKit bus \memberof pw_rtkit */
-struct pw_rtkit_bus *
-pw_rtkit_bus_get_system(void);
-
-/** Free an RTKit bus \memberof pw_rtkit */
-void
-pw_rtkit_bus_free(struct pw_rtkit_bus *system_bus);
-
-
-/** This is mostly equivalent to sched_setparam(thread, SCHED_RR, {
- * .sched_priority = priority }). 'thread' needs to be a kernel thread
- * id as returned by gettid(), not a pthread_t! If 'thread' is 0 the
- * current thread is used. The returned value is a negative errno
- * style error code, or 0 on success.
- * \memberof pw_rtkit
- */
-int
-pw_rtkit_make_realtime(struct pw_rtkit_bus *system_bus, pid_t thread, int priority);
-
-
-/** This is mostly equivalent to setpriority(PRIO_PROCESS, thread,
- * nice_level). 'thread' needs to be a kernel thread id as returned by
- * gettid(), not a pthread_t! If 'thread' is 0 the current thread is
- * used. The returned value is a negative errno style error code, or
- * 0 on success.
- * \memberof pw_rtkit
- */
-int
-pw_rtkit_make_high_priority(struct pw_rtkit_bus *system_bus, pid_t thread, int nice_level);
-
-/** Return the maximum value of realtime priority available. Realtime requests
- * above this value will fail. A negative value is an errno style error code.
- * \memberof pw_rtkit
- */
-int
-pw_rtkit_get_max_realtime_priority(struct pw_rtkit_bus *system_bus);
-
-/** Retreive the minimum value of nice level available. High prio requests
- * below this value will fail. The returned value is a negative errno
- * style error code, or 0 on success.
- * \memberof pw_rtkit
- */
-int
-pw_rtkit_get_min_nice_level(struct pw_rtkit_bus *system_bus, int *min_nice_level);
-
-/** Return the maximum value of RLIMIT_RTTIME to set before attempting a
- * realtime request. A negative value is an errno style error code.
- * \memberof pw_rtkit
- */
-long long
-pw_rtkit_get_rttime_usec_max(struct pw_rtkit_bus *system_bus);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __PIPEWIRE_RTKIT_H__ */