Added time_wait_ms function to stdlib

include/aos/paging_types.h

@@ -82,7 +82,6 @@ struct paging_state {
     struct capref free_l2_vnode;
     struct capref free_l3_vnode;
 
-    // TODO rueegges: implement more precisely?
     struct pt_vaddr_reg_t vaddr_head;
 };
 

include/time.h

@@ -152,6 +152,7 @@ time_t mktime(struct tm *);
 size_t strftime(char * __restrict, size_t, const char * __restrict,
     const struct tm * __restrict);
 time_t time(time_t *);
+void time_wait_ms(unsigned long);
 #if __POSIX_VISIBLE >= 200112
 struct sigevent;
 int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);

lib/aos/paging.c

@@ -317,7 +317,6 @@ errval_t paging_init_state(struct paging_state *st, lvaddr_t start_vaddr,
     assert(ca != NULL);
 
     // initialize slab allocators
-    // TODO rueegges: is this how we should initialize the slab allocators?
     slab_init(&st->pt_slabs, PT_META_MAX_SIZE, NULL);
     slab_init(&st->pt_children_slabs, BASE_PAGE_SIZE, NULL);
 

lib/grading/test_spawn.c

@@ -1,6 +1,7 @@
 #include <test_helper.h>
 #include <test_spawn.h>
 #include <spawn/spawn.h>
+#include <time.h>
 
 #define PROCESS_COUNT 5
 
@@ -14,7 +15,8 @@ void do_test_spawn(void) {
     CHECK_ERR(spawn_load_by_name("hello", &(si[i]), &(pid[i])));
   }
 
-  for(volatile int j = 0; j < 300000000; ++j);
+  // wait for 10 seconds before continuing
+  time_wait_ms(10000);
 
   for(uint i = 0; i < PROCESS_COUNT; ++i) {
     debug_printf("TEST_SPAWN: Killing %u\n", i);

lib/libc/gen/time.c

@@ -50,3 +50,24 @@ time(time_t *t)
 		*t = retval;
 	return (retval);
 }
+
+/**
+ * \brief Wait for ms milliseconds before returning.
+ *
+ * \param ms    Duration to wait
+ * 
+ * Very ugly and approximate but useful
+ *
+ */
+void
+time_wait_ms(unsigned long ms) {
+	struct timespec tt;
+
+	clock_gettime(CLOCK_REALTIME, &tt);
+	long start = tt.tv_sec * 1000 + tt.tv_nsec / 1000 / 1000;
+	long now;
+	do {
+		clock_gettime(CLOCK_REALTIME, &tt);
+		now = tt.tv_sec * 1000 + tt.tv_nsec / 1000 / 1000;
+	} while(start + ms > now);
+}

usr/hello/hello.c

@@ -16,7 +16,7 @@
 
 #include <stdio.h>
 #include <string.h>
-#include <sys/time.h>
+#include <time.h>
 
 #include <aos/aos.h>
 
@@ -24,12 +24,7 @@
 
 int main(int argc, char *argv[])
 {
-	struct timespec tt;
-
-	if (clock_gettime(CLOCK_REALTIME, &tt) < 0) return 1;
-    double time = tt.tv_sec + tt.tv_nsec / 1000000000.0;
-
-    printf("Hello, world! I am %lfs\n", time);
+    printf("Hello, world!\n");
     
     printf("argv:\n");
     for(int i = 0; i < argc; ++i) {
@@ -38,10 +33,12 @@ int main(int argc, char *argv[])
 
     // if we receive the catch command, RUN!
     if (argc > 1 && !strncmp(argv[1], HELLO_CATCH_COMMAND, sizeof(HELLO_CATCH_COMMAND))) {
+        int iter = 0;
         while(1) {
-            printf("Catch %lf if you can!\n", time);
+            printf("Catch me if you can! %d\n", iter);
             // wait for 1 second
-            for(volatile int j = 0; j < 50000000; ++j);
+            time_wait_ms(1000);
+            ++iter;
         }
     }