gearmulator

Emulation of classic VA synths of the late 90s/2000s that are based on Motorola 56300 family DSPs
Log | Files | Refs | Submodules | README | LICENSE

ptrigger.cxx (1394B)

      1 /*
      2  *
      3  *  C++ Portable Types Library (PTypes)
      4  *  Version 2.1.1  Released 27-Jun-2007
      5  *
      6  *  Copyright (C) 2001-2007 Hovik Melikyan
      7  *
      8  *  http://www.melikyan.com/ptypes/
      9  *
     10  */
     11 
     12 #ifdef WIN32
     13 #  include <windows.h>
     14 #else
     15 #  include <sys/time.h>
     16 #  include <pthread.h>
     17 #  include <errno.h>
     18 #endif
     19 
     20 #include "pasync.h"
     21 
     22 
     23 namespace ptypes {
     24 
     25 
     26 static void trig_fail()
     27 {
     28     fatal(CRIT_FIRST + 41, "Trigger failed");
     29 }
     30 
     31 
     32 
     33 #ifdef WIN32
     34 
     35 
     36 trigger::trigger(bool autoreset, bool state)
     37 {
     38     handle = CreateEvent(0, !autoreset, state, 0);
     39     if (handle == 0)
     40         trig_fail();
     41 }
     42 
     43 
     44 #else
     45 
     46 
     47 inline void trig_syscheck(int r)
     48 {
     49     if (r != 0)
     50         trig_fail();
     51 }
     52 
     53 
     54 trigger::trigger(bool iautoreset, bool istate)
     55     : state(int(istate)), autoreset(iautoreset)
     56 {
     57     trig_syscheck(pthread_mutex_init(&mtx, 0));
     58     trig_syscheck(pthread_cond_init(&cond, 0));
     59 }
     60 
     61 
     62 trigger::~trigger()
     63 {
     64     pthread_cond_destroy(&cond);
     65     pthread_mutex_destroy(&mtx);
     66 }
     67 
     68 
     69 void trigger::wait()
     70 {
     71     pthread_mutex_lock(&mtx);
     72     while (state == 0)
     73         pthread_cond_wait(&cond, &mtx);
     74     if (autoreset)
     75 	state = 0;
     76     pthread_mutex_unlock(&mtx);
     77 } 
     78 
     79 
     80 void trigger::post()
     81 {
     82     pthread_mutex_lock(&mtx);
     83     state = 1;
     84     if (autoreset)
     85         pthread_cond_signal(&cond);
     86     else
     87         pthread_cond_broadcast(&cond);
     88     pthread_mutex_unlock(&mtx);
     89 }
     90 
     91 
     92 void trigger::reset()
     93 {
     94     state = 0;
     95 }
     96 
     97 
     98 #endif
     99 
    100 
    101 }