Changeset c93e805 in mainline for generic/src/time/clock.c

Timestamp:

2006-05-28T11:29:23Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

74fbedb

Parents:

6212095

Message:

Add missed_clock_ticks to CPU structure so that clock() can detect missed timer interrupts.
Architectures are required to support this in order to make time keeping accurate.

File:

• generic/src/time/clock.c (modified) (2 diffs)

generic/src/time/clock.c

@@ -63 +63 @@
         timeout_handler_t f;
         void *arg;
+        int i;
 
         /*
@@ -68 +69 @@
          * run all expired timeouts as you visit them.
          */
-        spinlock_lock(&CPU->timeoutlock);
-        while ((l = CPU->timeout_active_head.next) != &CPU->timeout_active_head) {
-                h = list_get_instance(l, timeout_t, link);
-                spinlock_lock(&h->lock);
-                if (h->ticks-- != 0) {
-                        spinlock_unlock(&h->lock);
-                        break;
+        for (i = 0; i < CPU->missed_clock_ticks; i++) {
+                spinlock_lock(&CPU->timeoutlock);
+                while ((l = CPU->timeout_active_head.next) != &CPU->timeout_active_head) {
+                        h = list_get_instance(l, timeout_t, link);
+                        spinlock_lock(&h->lock);
+                        if (h->ticks-- != 0) {
+                                spinlock_unlock(&h->lock);
+                                break;
+                        }
+                        list_remove(l);
+                        f = h->handler;
+                        arg = h->arg;
+                        timeout_reinitialize(h);
+                        spinlock_unlock(&h->lock);      
+                        spinlock_unlock(&CPU->timeoutlock);
+
+                        f(arg);
+
+                        spinlock_lock(&CPU->timeoutlock);
                 }
-                list_remove(l);
-                f = h->handler;
-                arg = h->arg;
-                timeout_reinitialize(h);
-                spinlock_unlock(&h->lock);      
                 spinlock_unlock(&CPU->timeoutlock);
-
-                f(arg);
-
-                spinlock_lock(&CPU->timeoutlock);
         }
-        spinlock_unlock(&CPU->timeoutlock);
+        CPU->missed_clock_ticks = 0;
 
         /*