tools/zalsa/pxthread.cc

   1 // ----------------------------------------------------------------------------
   2 //
   3 //  Copyright (C) 2012 Fons Adriaensen <fons@linuxaudio.org>
   4 //
   5 //  This program is free software; you can redistribute it and/or modify
   6 //  it under the terms of the GNU General Public License as published by
   7 //  the Free Software Foundation; either version 3 of the License, or
   8 //  (at your option) any later version.
   9 //
  10 //  This program is distributed in the hope that it will be useful,
  11 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 //  GNU General Public License for more details.
  14 //
  15 //  You should have received a copy of the GNU General Public License
  16 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 //
  18 // ----------------------------------------------------------------------------
  19
  20
  21 #include "pxthread.h"
  22
  23
  24 Pxthread::Pxthread (void) :  _thrid (0)
  25 {
  26 }
  27
  28
  29 Pxthread::~Pxthread (void)
  30 {
  31 }
  32
  33
  34 extern "C" void *Pxthread_entry_point (void *arg)
  35 {
  36     Pxthread *T = (Pxthread *) arg;
  37     T->thr_main ();
  38     return NULL;
  39 }
  40
  41
  42 int Pxthread::thr_start (int policy, int priority, size_t stacksize)
  43 {
  44     int                min, max, rc;
  45     pthread_attr_t     attr;
  46     struct sched_param parm;
  47
  48     min = sched_get_priority_min (policy);
  49     max = sched_get_priority_max (policy);
  50     priority += max;
  51     if (priority > max) priority = max;
  52     if (priority < min) priority = min;
  53     parm.sched_priority = priority;
  54
  55     pthread_attr_init (&attr);
  56     pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
  57     pthread_attr_setschedpolicy (&attr, policy);
  58     pthread_attr_setschedparam (&attr, &parm);
  59     pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
  60     pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
  61     pthread_attr_setstacksize (&attr, stacksize);
  62
  63     _thrid = 0;
  64     rc = pthread_create (&_thrid,
  65                          &attr,
  66                          Pxthread_entry_point,
  67                          this);
  68
  69     pthread_attr_destroy (&attr);
  70
  71     return rc;
  72 }
  73
  74
  75 void Pxthread::thr_main (void)
  76 {
  77 }
  78
  79
  80 void Pxthread::thr_wait (void)
  81 {
  82     if (_thrid == 0)
  83         return;
  84     pthread_join (_thrid, NULL);
  85     _thrid = 0;
  86 }
  87