Changeset f9061b4 in mainline for uspace

Timestamp:

2011-05-16T13:38:04Z (15 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4e1a2f5

Parents:

e0f52bf

Message:

add kernel event notification masking (currently used only for EVENT_KLOG)
improve kernel event notification API

Location:

uspace

Files:

• app/klog/klog.c (modified) (3 diffs)
• lib/c/generic/event.c (modified) (1 diff)
• lib/c/include/event.h (modified) (1 diff)

uspace/app/klog/klog.c

@@ -74 +74 @@
                 fsync(fileno(log));
         }
+        
+        event_unmask(EVENT_KLOG);
 }
 
@@ -111 +113 @@
         }
         
-        rc = event_subscribe(EVENT_KLOG, 0);
-        if (rc != EOK) {
-                fprintf(stderr, "%s: Unable to register klog notifications\n",
-                    NAME);
-                return rc;
-        }
-        
         log = fopen(LOG_FNAME, "a");
         if (log == NULL)
@@ -124 +119 @@
         
         async_set_interrupt_received(interrupt_received);
+        rc = event_subscribe(EVENT_KLOG, 0);
+        if (rc != EOK) {
+                fclose(log);
+                fprintf(stderr, "%s: Unable to register klog notifications\n",
+                    NAME);
+                return rc;
+        }
+        
+        event_unmask(EVENT_KLOG);
+        
         klog_update();
         async_manager();

uspace/lib/c/generic/event.c

@@ -41 +41 @@
 #include <kernel/ipc/event_types.h>
 
-/** Subscribe for event notifications.
+/** Subscribe event notifications.
  *
- * @param evno   Event number.
- * @param method Use this method for notifying me.
+ * @param evno    Event type to subscribe.
+ * @param imethod Use this interface and method for notifying me.
  *
  * @return Value returned by the kernel.
+ *
  */
-int event_subscribe(event_type_t e, sysarg_t method)
+int event_subscribe(event_type_t evno, sysarg_t imethod)
 {
-        return __SYSCALL2(SYS_EVENT_SUBSCRIBE, (sysarg_t) e, (sysarg_t) method);
+        return __SYSCALL2(SYS_EVENT_SUBSCRIBE, (sysarg_t) evno,
+            (sysarg_t) imethod);
+}
+
+/** Unmask event notifications.
+ *
+ * @param evno Event type to unmask.
+ *
+ * @return Value returned by the kernel.
+ *
+ */
+int event_unmask(event_type_t evno)
+{
+        return __SYSCALL1(SYS_EVENT_UNMASK, (sysarg_t) evno);
 }
 

uspace/lib/c/include/event.h

@@ -39 +39 @@
 
 extern int event_subscribe(event_type_t, sysarg_t);
+extern int event_unmask(event_type_t);
 
 #endif