/*
- Copyright (C) 2002 Paul Davis
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
-*/
+ * Copyright (C) 2002-2015 Paul Davis <paul@linuxaudiosystems.com>
+ * Copyright (C) 2007-2009 David Robillard <d@drobilla.net>
+ * Copyright (C) 2015-2018 Robin Gareus <robin@gareus.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.
+ */
#include <set>
#include <string>
static Glib::Threads::Private<char> thread_name (free);
namespace PBD {
- PBD::Signal4<void,std::string, pthread_t,std::string,uint32_t> ThreadCreatedWithRequestSize;
+ PBD::Signal3<void,pthread_t,std::string,uint32_t> ThreadCreatedWithRequestSize;
}
using namespace PBD;
#endif
}
+
void
-PBD::notify_gui_about_thread_creation (std::string target_gui, pthread_t thread, std::string str, int request_count)
+PBD::notify_event_loops_about_thread_creation (pthread_t thread, const std::string& emitting_thread_name, int request_count)
{
- ThreadCreatedWithRequestSize (target_gui, thread, str, request_count);
+ /* notify threads that may exist in the future (they may also exist
+ * already, in which case they will catch the
+ * ThreadCreatedWithRequestSize signal)
+ */
+ EventLoop::pre_register (emitting_thread_name, request_count);
+
+ /* notify all existing threads */
+ ThreadCreatedWithRequestSize (thread, emitting_thread_name, request_count);
}
struct ThreadStartWithName {
void* (*thread_work)(void*);
void* arg;
std::string name;
-
+
ThreadStartWithName (void* (*f)(void*), void* a, const std::string& s)
: thread_work (f), arg (a), name (s) {}
};
return ret;
}
-int
+int
pthread_create_and_store (string name, pthread_t *thread, void * (*start_routine)(void *), void * arg)
{
pthread_attr_t default_attr;
pthread_set_name (const char *str)
{
/* copy string and delete it when exiting */
-
- thread_name.set (strdup (str));
+
+ thread_name.set (strdup (str)); // leaks
}
const char *
if (str) {
return str;
- }
+ }
return "unknown";
}
void
-pthread_kill_all (int signum)
-{
+pthread_kill_all (int signum)
+{
pthread_mutex_lock (&thread_map_lock);
for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
if (!pthread_equal ((*i), pthread_self())) {
}
void
-pthread_cancel_all ()
-{
+pthread_cancel_all ()
+{
pthread_mutex_lock (&thread_map_lock);
for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ) {
}
void
-pthread_cancel_one (pthread_t thread)
-{
+pthread_cancel_one (pthread_t thread)
+{
pthread_mutex_lock (&thread_map_lock);
for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
if (pthread_equal ((*i), thread)) {
pthread_mutex_unlock (&thread_map_lock);
}
+int
+pbd_absolute_rt_priority (int policy, int priority)
+{
+ /* POSIX requires a spread of at least 32 steps between min..max */
+ const int p_min = sched_get_priority_min (policy); // Linux: 1
+ const int p_max = sched_get_priority_max (policy); // Linux: 99
+
+ if (priority == 0) {
+ /* use default. XXX this should be relative to audio (JACK) thread,
+ * internal backends use -20 (Audio), -21 (MIDI), -22 (compuation)
+ */
+ priority = 7; // BaseUI backwards compat.
+ }
+
+ if (priority > 0) {
+ priority += p_min;
+ } else {
+ priority += p_max;
+ }
+ if (priority > p_max) priority = p_max;
+ if (priority < p_min) priority = p_min;
+ return priority;
+}
+
+
+
+int
+pbd_realtime_pthread_create (
+ const int policy, int priority, const size_t stacksize,
+ pthread_t *thread,
+ void *(*start_routine) (void *),
+ void *arg)
+{
+ int rv;
+
+ pthread_attr_t attr;
+ struct sched_param parm;
+
+ parm.sched_priority = pbd_absolute_rt_priority (policy, priority);
+
+ pthread_attr_init (&attr);
+ pthread_attr_setschedpolicy (&attr, policy);
+ pthread_attr_setschedparam (&attr, &parm);
+ pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
+ pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
+ pthread_attr_setstacksize (&attr, stacksize);
+ rv = pthread_create (thread, &attr, start_routine, arg);
+ pthread_attr_destroy (&attr);
+ return rv;
+}
+int
+pbd_set_thread_priority (pthread_t thread, const int policy, int priority)
+{
+ struct sched_param param;
+ memset (¶m, 0, sizeof (param));
+ param.sched_priority = pbd_absolute_rt_priority (policy, priority);
+
+ return pthread_setschedparam (thread, SCHED_FIFO, ¶m);
+}
+
+bool
+pbd_mach_set_realtime_policy (pthread_t thread_id, double period_ns)
+{
+#ifdef _APPLE_
+ thread_time_constraint_policy_data_t policy;
+#ifndef NDEBUG
+ mach_msg_type_number_t msgt = 4;
+ boolean_t dflt = false;
+ kern_return_t rv = thread_policy_get (pthread_mach_thread_np (_main_thread),
+ THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t) &policy,
+ &msgt, &dflt);
+ printf ("Mach Thread(%p) %d %d %d %d DFLT %d OK: %d\n", _main_thread, policy.period, policy.computation, policy.constraint, policy.preemptible, dflt, rv == KERN_SUCCESS);
+#endif
+
+ mach_timebase_info_data_t timebase_info;
+ mach_timebase_info(&timebase_info);
+ const double period_clk = period_ns * (double)timebase_info.denom / (double)timebase_info.numer;
+
+ policy.period = period_clk;
+ policy.computation = period_clk * .9;
+ policy.constraint = period_clk * .95;
+ policy.preemptible = true;
+ kern_return_t res = thread_policy_set (pthread_mach_thread_np (thread_id),
+ THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t) &policy,
+ THREAD_TIME_CONSTRAINT_POLICY_COUNT);
+
+#ifndef NDEBUG
+ printf ("Mach Thread(%p) %d %d %d %d OK: %d\n", thread_id, policy.period, policy.computation, policy.constraint, policy.preemptible, res == KERN_SUCCESS);
+#endif
+ return res != KERN_SUCCESS;
+#endif
+ return false; // OK
+}
projects / ardour.git / blobdiff