Changeset 06cb827 in mainline

Timestamp:

2011-07-01T23:34:23Z (14 years ago)

Author:

Petr Koupy <petr.koupy@…>

Branches:

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

Children:

fb872c1

Parents:

a43fbc95

Message:

Implemented clock().

Location:

uspace/lib/posix

Files:

• time.c (modified) (3 diffs)
• time.h (modified) (1 diff)

uspace/lib/posix/time.c

@@ -38 +38 @@
 #include "internal/common.h"
 #include "time.h"
+#include "libc/malloc.h"
+#include <task.h>
+#include <stats.h>
 
 /**
@@ -85 +88 @@
         // TODO
         if (maxsize >= 1) {
-                *s = 0;
+                *s = '\0';
         }
         return 0;
@@ -91 +94 @@
 
 /**
- * 
- * @return
+ * Get CPU time used since the process invocation.
+ *
+ * @return Consumed CPU cycles by this process or -1 if not available.
  */
 posix_clock_t posix_clock(void)
 {
-        // TODO
-        return (posix_clock_t) -1;
+        posix_clock_t total_cycles = -1;
+        stats_task_t *task_stats = stats_get_task(task_get_id());
+        if (task_stats) {
+                total_cycles = (posix_clock_t) (task_stats->kcycles + task_stats->ucycles);
+        }
+        free(task_stats);
+        task_stats = 0;
+
+        return total_cycles;
 }
 

uspace/lib/posix/time.h

@@ -43 +43 @@
 #endif
 
+#undef CLOCKS_PER_SEC
+#define CLOCKS_PER_SEC 1000000L
+
 struct posix_tm {
         int tm_sec;         /* Seconds [0,60]. */