/*
- Copyright (C) 2002 Paul Davis
+ 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
*/
#include <set>
-#include <iostream>
#include <string>
+#include <cstring>
#include <stdint.h>
#include "pbd/pthread_utils.h"
#include <fst.h>
#endif
+#ifdef COMPILER_MSVC
+DECLARE_DEFAULT_COMPARISONS(pthread_t) // Needed for 'DECLARE_DEFAULT_COMPARISONS'. Objects in an STL container can be
+ // searched and sorted. Thus, when instantiating the container, MSVC complains
+ // if the type of object being contained has no appropriate comparison operators
+ // defined (specifically, if operators '<' and '==' are undefined). This seems
+ // to be the case with ptw32 'pthread_t' which is a simple struct.
+#endif
+
using namespace std;
-typedef std::
set<pthread_t> ThreadMap;
+typedef std::
list<pthread_t> ThreadMap;
static ThreadMap all_threads;
static pthread_mutex_t thread_map_lock = PTHREAD_MUTEX_INITIALIZER;
-static Glib::StaticPrivate<char> thread_name;
+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;
- const char* name;
-
- ThreadStartWithName (void* (*f)(void*), void* a, const char* s)
+ std::string name;
+
+ ThreadStartWithName (void* (*f)(void*), void* a, const std::string& s)
: thread_work (f), arg (a), name (s) {}
};
void* (*thread_work)(void*) = ts->thread_work;
void* thread_arg = ts->arg;
- pthread_set_name (ts->name);
+ /* name will be deleted by the default handler for GStaticPrivate, when the thread exits */
+
+ pthread_set_name (ts->name.c_str());
+
+ /* we don't need this object anymore */
delete ts;
- /* name will be deleted by the default handler for GStaticPrivate, when the thread exits */
- return thread_work (thread_arg);
+ /* actually run the thread's work function */
+
+ void* ret = thread_work (thread_arg);
+
+ /* cleanup */
+
+ pthread_mutex_lock (&thread_map_lock);
+
+ for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
+ if (pthread_equal ((*i), pthread_self())) {
+ all_threads.erase (i);
+ break;
+ }
+ }
+
+ pthread_mutex_unlock (&thread_map_lock);
+
+ /* done */
+
+ 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_attr_init(&default_attr);
pthread_attr_setstacksize(&default_attr, 500000);
- char* cname = new char[name.length() + 1];
- strcpy (cname, name.c_str());
-
- ThreadStartWithName* ts = new ThreadStartWithName (start_routine, arg, cname);
+ ThreadStartWithName* ts = new ThreadStartWithName (start_routine, arg, name);
if ((ret = thread_creator (thread, &default_attr, fake_thread_start, ts)) == 0) {
pthread_mutex_lock (&thread_map_lock);
- all_threads.insert (*thread);
+ all_threads.push_back (*thread);
pthread_mutex_unlock (&thread_map_lock);
}
void
pthread_set_name (const char *str)
{
- /* str will be deleted when this thread exits */
- thread_name.set (const_cast<char*>(str));
+ /* copy string and delete it when exiting */
+
+ 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 ((*i) != pthread_self()) {
+ if (!pthread_equal ((*i), pthread_self())) {
pthread_kill ((*i), signum);
}
}
}
void
-pthread_cancel_all ()
-{
+pthread_cancel_all ()
+{
pthread_mutex_lock (&thread_map_lock);
- for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
- if ((*i) != pthread_self()) {
+
+ for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ) {
+
+ ThreadMap::iterator nxt = i;
+ ++nxt;
+
+ if (!pthread_equal ((*i), pthread_self())) {
pthread_cancel ((*i));
}
+
+ i = nxt;
}
all_threads.clear();
pthread_mutex_unlock (&thread_map_lock);
}
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 ((*i) == thread) {
+ if (pthread_equal ((*i), thread)) {
all_threads.erase (i);
break;
}
pthread_mutex_unlock (&thread_map_lock);
}
-void
-pthread_exit_pbd (void* status)
-{
- pthread_t thread = pthread_self();
+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.
+ }
- pthread_mutex_lock (&thread_map_lock);
- for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
- if ((*i) == thread) {
- all_threads.erase (i);
- break;
- }
+ if (priority > 0) {
+ priority += p_min;
+ } else {
+ priority += p_max;
}
- pthread_mutex_unlock (&thread_map_lock);
- pthread_exit (status);
+ 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