sys_msleep and sys_jiffies used by PPP code.From Marc

src/core/sys.c

@@ -278,6 +278,16 @@ sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout)
     
 }
 
+/*-----------------------------------------------------------------------------------*/
+void
+sys_msleep(u32_t ms)
+{
+	sys_sem_t delaysem = sys_sem_new(0);
+
+	sys_sem_wait_timeout(delaysem, ms);
+
+	sys_sem_free(delaysem);
+}
 /*-----------------------------------------------------------------------------------*/
 
 #endif /* NO_SYS */

src/include/lwip/sys.h

@@ -103,6 +103,14 @@ void sys_sem_free(sys_sem_t sem);
 void sys_sem_wait(sys_sem_t sem);
 int sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout);
 
+/* Time functions. */
+#ifndef sys_msleep
+void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
+#endif
+#ifndef sys_jiffies
+u32_t sys_jiffies(void); /* since power up. */
+#endif
+
 /* Mailbox functions. */
 sys_mbox_t sys_mbox_new(void);
 void sys_mbox_post(sys_mbox_t mbox, void *msg);