Timeline: Fix thread synchronization issues during recording.

nonlib/Loggable.C

@@ -36,6 +36,8 @@
 // #include "const.h"
 #include "debug.h"
 
+#include "Mutex.H"
+
 #include <algorithm>
 using std::min;
 using std::max;
@@ -64,8 +66,11 @@ void *Loggable::_dirty_callback_arg = NULL;
 
 
 
+static Mutex _lock;
+
 Loggable::~Loggable ( )
 {
+    Locker lock( _lock );;
     _loggables[ _id ].loggable = NULL;
 }
 
@@ -74,12 +79,15 @@ Loggable::~Loggable ( )
 void
 Loggable::block_start ( void )
 {
+    Locker lock( _lock );;
     ++Loggable::_level;
 }
 
 void
 Loggable::block_end ( void )
 {
+    Locker lock( _lock );;
+
     --Loggable::_level;
 
     ASSERT( Loggable::_level >= 0, "Programming error" );
@@ -559,6 +567,8 @@ Loggable::compact ( void )
 void
 Loggable::log ( const char *fmt, ... )
 {
+    Locker lock( _lock );
+
     static char * buf = NULL;
     static size_t i = 0;
     static size_t buf_size = 0;
@@ -689,6 +699,8 @@ Loggable::log_print( const Log_Entry *o, const Log_Entry *n ) const
 void
 Loggable::log_start ( void )
 {
+    Locker lock( _lock );;
+
     if ( ! _old_state )
     {
         _old_state = new Log_Entry;
@@ -702,6 +714,8 @@ Loggable::log_start ( void )
 void
 Loggable::log_end ( void )
 {
+    Locker lock( _lock );;
+
     ASSERT( _old_state, "Programming error: log_end() called before log_start()" );
 
     if ( --_nest > 0 )
@@ -737,6 +751,8 @@ Loggable::log_end ( void )
 void
 Loggable::log_create ( void ) const
 {
+    Locker lock( _lock );;
+
     set_dirty();
 
     if ( ! _fp )
@@ -786,6 +802,8 @@ Loggable::record_unjournaled ( void ) const
 void
 Loggable::log_destroy ( void ) const
 {
+    Locker lock( _lock );;
+
     /* the unjournaled state may have changed: make a note of it. */
     record_unjournaled();
 

nonlib/Thread.C

@@ -116,3 +116,10 @@ Thread::join ( void )
     pthread_join( _thread, NULL );
     _thread = 0;
 }
+
+void
+Thread::exit ( void *retval )
+{
+    pthread_exit( retval );
+    _thread = 0;
+}

nonlib/Thread.H

@@ -52,5 +52,6 @@ public:
     bool clone ( void *(*entry_point)(void *), void *arg );
     void detach ( void );
     void join ( void );
+    void exit ( void *retval = 0 );
 
 };

timeline/src/Engine/Audio_Region.C

@@ -175,11 +175,14 @@ Audio_Region::read ( sample_t *buf, nframes_t pos, nframes_t nframes, int channe
     return cnt;
 }
 
-
 /** prepare for capturing */
 void
 Audio_Region::prepare ( void )
 {
+    THREAD_ASSERT( Capture );
+
+    DMESSAGE( "Preparing capture region" );
+
     log_start();
 }
 
@@ -218,15 +221,10 @@ Audio_Region::finalize ( nframes_t frame )
 
     _range.length = frame - _range.start;
 
-    log_end();
-
     _clip->close();
     _clip->open();
 
-    Fl::lock();
+    log_end();
-    redraw();
-    Fl::awake();
-    Fl::unlock();
 
     return true;
 }

timeline/src/Engine/Disk_Stream.C

@@ -30,6 +30,7 @@ class Audio_Sequence;
 #include "const.h"
 #include "debug.h"
 
+#include <unistd.h>
 
 
 
@@ -139,14 +140,24 @@ Disk_Stream::detach ( void )
 /** stop the IO thread. */
 void
 Disk_Stream::shutdown ( void )
+{
+    if ( _thread.running() )
     {
         _terminate = true;
         
         /* try to wake the thread so it'll see that it's time to die */
+        while ( _terminate )
+        {
+            usleep( 100 );
             block_processed();
+        }
         
-    if ( _thread.running() )
         _thread.join();
+
+        sem_destroy( &_blocks );
+
+        sem_init( &_blocks, 0, 0 );
+    }
 }
 
 Track *

timeline/src/Engine/Disk_Stream.H

@@ -94,11 +94,12 @@ protected:
     virtual void flush ( void ) = 0;
 
     void run ( void );
-    void shutdown ( void );
     void detach ( void );
 
 public:
 
+    void shutdown ( void );
+
     /* must be set before any Disk_Streams are created */
     static float seconds_to_buffer;
     static size_t disk_io_kbytes;

timeline/src/Engine/Record_DS.C

@@ -74,10 +74,10 @@ Record_DS::disk_thread ( void )
 {
     _thread.name( "Capture" );
 
-    track()->record( _capture, _frame );
-
     DMESSAGE( "capture thread running..." );
 
+    track()->record( _capture, _frame );
+
     const nframes_t nframes = _nframes * _disk_io_blocks;
 
     /* buffer to hold the interleaved data returned by the track reader */
@@ -211,7 +211,10 @@ Record_DS::disk_thread ( void )
     delete c;
 
     _terminate = false;
+
     DMESSAGE( "capture thread gone" );
+
+    _thread.exit();
 }
 
 
@@ -258,7 +261,7 @@ Record_DS::stop ( nframes_t frame )
 
     _stop_frame = frame;
 
-    detach();
+//    detach();
 
     DMESSAGE( "recording finished" );
 }

timeline/src/Engine/Timeline.C

@@ -75,6 +75,17 @@ Timeline::stop ( void )
             t->record_ds->stop( frame );
     }
 
+    /* wait until finalization is complete before continuing */
+
+    DMESSAGE( "Waiting for record threads to shutdown" );
+    for ( int i = tracks->children(); i-- ; )
+    {
+        Track *t = (Track*)tracks->child( i );
+        
+        if ( t->armed() && t->record_ds )
+            t->record_ds->shutdown();
+    }
+   
     Loggable::block_end();
 
     activate();

timeline/src/Engine/Track.C

@@ -304,7 +304,6 @@ Track::finalize ( Capture *c, nframes_t frame )
      * them */
     c->audio_file->finalize();
 
-    /* peaks get finalized here */
     c->region->finalize( frame );
 
     nframes_t capture_offset = 0;