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/*
* --- GSMP-COPYRIGHT-NOTE-BEGIN ---
*
* This copyright note is auto-generated by ./scripts/Create-CopyPatch.
* Please add additional copyright information _after_ the line containing
* the GSMP-COPYRIGHT-NOTE-END tag. Otherwise it might get removed by
* the ./scripts/Create-CopyPatch script. Do not edit this copyright text!
*
* GSMP: utility/src/Threads.cc
* General Sound Manipulation Program is Copyright (C) 2000 - 2009
* Valentin Ziegler and René Rebe
*
* 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; version 2. A copy of the GNU General
* Public License can be found in the file LICENSE.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANT-
* ABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* --- GSMP-COPYRIGHT-NOTE-END ---
*/
#include <unistd.h>
#include <signal.h>
#include <sched.h> // Linux/POSIX scheduler / realtime scheduling ...
#include <sys/resource.h> // set_priority
#include "Threads.hh"
#include "Logging.hh"
using namespace Utility::Threads;
MutexAttr Mutex::Default = {0};
CondAttr Condition::Default = {0};
ThreadAttr Thread::Default = {0};
void Semaphore::Up()
{
access.Lock();
++ value;
access.Unlock();
sig.Signal();
}
void Semaphore::Down()
{
access.Lock();
while (value < 1)
sig.Wait (access);
-- value;
access.Unlock();
}
Thread::Thread (const ThreadAttr &i_attr)
: attr(i_attr)
{
}
Thread::~Thread ()
{
}
int Thread::Create (void* arg)
{
arg_ = arg; // copy the arg for the static trampoline
Thread *t = this;
return pthread_create (&thread, attr.impl, call_main_static_, t);
}
int Thread::Detach ()
{
return pthread_detach (thread);
}
void* Thread::Join ()
{
void* thread_return;
if (pthread_join (thread, &thread_return) == 0)
return thread_return;
else
return 0;
}
void Thread::StopInDebugger ()
{
pid_t m_pid = getpid ();
kill (m_pid, SIGTRAP);
}
#ifdef __linux__
bool Thread::EnableRealtimeScheduling ()
{
int t_pri = sched_get_priority_min (SCHED_FIFO);
Q_LOG (UtilityLog) << "priority_min: " << t_pri << std::endl;
if (t_pri >= 0) {
sched_param t_params;
t_params.sched_priority = t_pri;
int error = sched_setscheduler (0, SCHED_FIFO, &t_params);
if (error < 0) {
Q_WARN (UtilityLog) << "WARNING POSIX realtime-scheduling "
<< "not available (not root?)!" << std::endl;
}
return error >= 0;
}
Q_WARN (UtilityLog) << "WARNING minimal priority is positive!"
<< std::endl;
return false;
}
#endif
void Thread::USleep (int delay, bool high_precission)
{
/* From the nanosleep man-page:
*
* If the process is scheduled under a real-time policy like
* SCHED_FIFO or SCHED_RR, then pauses of up to 2 ms will be
* performed as busy waits with microsecond precision.
*/
if (!high_precission || delay > 2000)
usleep (delay);
else
sched_yield ();
}
void Thread::NSleep (int delay, bool high_precission)
{
/* From the nanosleep man-page:
*
* If the process is scheduled under a real-time policy like
* SCHED_FIFO or SCHED_RR, then pauses of up to 2 ms will be
* performed as busy waits with microsecond precision.
*/
if (!high_precission || delay > 2000000)
usleep (delay);
else
sched_yield ();
}
void Thread::Yield ()
{
sched_yield ();
}
bool Thread::SetPriority (int priority)
{
return setpriority (PRIO_PROCESS, 0, priority) >= 0;
}
void* Thread::call_main_ (void* arg)
{
void* return_;
return_ = main (arg);
pthread_exit (return_);
}
void* Thread::call_main_static_ (void* obj)
{
Thread *thread_ = (Thread*)obj;
return thread_->call_main_ (thread_->arg_);
}
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