Changeset 731 for soft/giet_vm/giet_libs/mwmr_channel.c

Timestamp:

Nov 22, 2015, 2:54:35 PM (9 years ago)

Author:

alain

Message:

Introduce a giet_pthhread_yield() to deschedule the blocking functions
when a channel is empty (read) or full (write).

File:

• soft/giet_vm/giet_libs/mwmr_channel.c (modified) (4 diffs)

soft/giet_vm/giet_libs/mwmr_channel.c

@@ -321 +321 @@
         }
 
-        // we could deschedule before retry...
-        // giet_context_switch();
+        // deschedule before retry
+        giet_pthread_yield();
     }
 } // end mwmr_write()
@@ -408 +408 @@
         }
 
-        // we could deschedule before retry...
-        // giet_context_switch();
+        // deschedule before retry
+        giet_pthread_yield();
     }
 } // end mwmr_read() 
@@ -472 +472 @@
         {
             items = nb_mwmr_read( bufio->mwmr , (uint32_t*)bufio->base , bufio->nitems );
+
+            // deschedule if channel empty
+            if (items == 0 ) giet_pthread_yield();
         } 
         while ( items == 0 );
@@ -513 +516 @@
             {
                 items = nb_mwmr_read( bufio->mwmr , (uint32_t*)bufio->base , bufio->nitems );
+
+                // deschedule if channel empty
+                if (items == 0 ) giet_pthread_yield();
             } 
             while ( items == 0 );