Changeset 1972 for features/performance/src/sleep.c

Timestamp:

04/09/08 22:55:17 (9 months ago)

Author:

aturner

Message:

writing to the ioport is complex enough it prolly doesn't belong full bore in
the header. refs #41

Files:

• features/performance/src/sleep.c (modified) (1 diff)

features/performance/src/sleep.c

@@ -64 +64 @@
 }
 
+void 
+ioport_sleep(const struct timespec nap) 
+{
+    struct timeval nap_for;
+    u_int32_t usec;
+    time_t i;
+    
+    TIMESPEC_TO_TIMEVAL(&nap_for, &nap);
+    
+    /* 
+     * process the seconds, we do this in a loop so we don't have to 
+     * use slower 64bit integers or worry about integer overflows.
+     */
+    for (i = 0; i < nap_for.tv_sec; i ++) {
+        usec = SEC_TO_MICROSEC(nap_for.tv_sec);
+        while (usec > 0) {
+            usec --;
+            outb(ioport_sleep_value, 0x80);
+        }
+    }
+    
+    /* process the usec */
+    usec = nap.tv_nsec / 1000;
+    usec --; /* fudge factor for all the above */
+    while (usec > 0) {
+        usec --;
+        outb(ioport_sleep_value, 0x80);
+    }
+}