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/*
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.
$Id$
*/
#include <set>
#include <string>
#include <cstring>
#include <stdint.h>
#include "pbd/pthread_utils.h"
#ifdef WINE_THREAD_SUPPORT
#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::list<pthread_t> ThreadMap;
static ThreadMap all_threads;
static pthread_mutex_t thread_map_lock = PTHREAD_MUTEX_INITIALIZER;
static Glib::Threads::Private<char> thread_name (free);
namespace PBD {
PBD::Signal3<void,pthread_t,std::string,uint32_t> ThreadCreatedWithRequestSize;
}
using namespace PBD;
static int thread_creator (pthread_t* thread_id, const pthread_attr_t* attr, void *(*function)(void*), void* arg)
{
#ifdef WINE_THREAD_SUPPORT
return wine_pthread_create (thread_id, attr, function, arg);
#else
return pthread_create (thread_id, attr, function, arg);
#endif
}
void
PBD::notify_event_loops_about_thread_creation (pthread_t thread, const std::string& emitting_thread_name, int 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) {}
};
static void*
fake_thread_start (void* arg)
{
ThreadStartWithName* ts = (ThreadStartWithName*) arg;
void* (*thread_work)(void*) = ts->thread_work;
void* thread_arg = ts->arg;
/* 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;
/* 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
pthread_create_and_store (string name, pthread_t *thread, void * (*start_routine)(void *), void * arg)
{
pthread_attr_t default_attr;
int ret;
// set default stack size to sensible default for memlocking
pthread_attr_init(&default_attr);
pthread_attr_setstacksize(&default_attr, 500000);
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.push_back (*thread);
pthread_mutex_unlock (&thread_map_lock);
}
pthread_attr_destroy(&default_attr);
return ret;
}
void
pthread_set_name (const char *str)
{
/* copy string and delete it when exiting */
thread_name.set (strdup (str)); // leaks
}
const char *
pthread_name ()
{
const char* str = thread_name.get ();
if (str) {
return str;
}
return "unknown";
}
void
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())) {
pthread_kill ((*i), signum);
}
}
all_threads.clear();
pthread_mutex_unlock (&thread_map_lock);
}
void
pthread_cancel_all ()
{
pthread_mutex_lock (&thread_map_lock);
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_mutex_lock (&thread_map_lock);
for (ThreadMap::iterator i = all_threads.begin(); i != all_threads.end(); ++i) {
if (pthread_equal ((*i), thread)) {
all_threads.erase (i);
break;
}
}
pthread_cancel (thread);
pthread_mutex_unlock (&thread_map_lock);
}
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