Changeset 407 for trunk/hal/tsar_mips32/drivers/soclib_bdv.c

Timestamp:

Nov 7, 2017, 3:08:12 PM (6 years ago)

Author:

alain

Message:

First implementation of fork/exec.

File:

• trunk/hal/tsar_mips32/drivers/soclib_bdv.c (modified) (2 diffs)

trunk/hal/tsar_mips32/drivers/soclib_bdv.c

@@ -104 +104 @@
 
     // waiting policy  depends on the command type
+    // - for IOC_READ / IOC_WRITE commands, this function is called by the server thread
+    // - for IOC_SYNC_READ command, this function is directly called by the client thread
 
-    if( cmd_type == IOC_SYNC_READ )                  // polling policy
+    if( cmd_type == IOC_SYNC_READ )                   // status polling policy
     {
         uint32_t status;
@@ -131 +133 @@
     { 
         thread_block( CURRENT_THREAD , THREAD_BLOCKED_DEV_ISR );
-        sched_yield( NULL );
+        sched_yield();
+
+        // the IO operation status is reported in the command by the ISR
     }