Changeset 9673fd3 in mainline for uspace/drv/time/cmos-rtc/cmos-rtc.c

Timestamp:

2012-08-23T11:50:07Z (12 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

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

Children:

ae827d0

Parents:

2e6293b

Message:

rtc: add support to offline/online operations

File:

• uspace/drv/time/cmos-rtc/cmos-rtc.c (modified) (5 diffs)

uspace/drv/time/cmos-rtc/cmos-rtc.c

@@ -71 +71 @@
         /** true if device is removed */
         bool removed;
+        /** number of connected clients */
+        int clients_connected;
         /** time at which the system booted */
         time_t boottime;
@@ -189 +191 @@
 
         rtc->boottime = 0;
+        rtc->clients_connected = 0;
 
         hw_resource_list_t hw_resources;
@@ -565 +568 @@
 
         fibril_mutex_lock(&rtc->mutex);
+        if (rtc->clients_connected > 0) {
+                fibril_mutex_unlock(&rtc->mutex);
+                return EBUSY;
+        }
 
         rtc->removed = true;
@@ -619 +626 @@
         if (rtc->removed)
                 rc = ENXIO;
-        else
+        else {
                 rc = EOK;
+                rtc->clients_connected++;
+        }
 
         fibril_mutex_unlock(&rtc->mutex);
@@ -633 +642 @@
 rtc_close(ddf_fun_t *fun)
 {
+        rtc_t *rtc = fun_rtc(fun);
+
+        fibril_mutex_lock(&rtc->mutex);
+
+        rtc->clients_connected--;
+        assert(rtc->clients_connected >= 0);
+
+        fibril_mutex_unlock(&rtc->mutex);
 }