git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@48 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 15 insertions, 12 deletions

diff --git a/src/chdelta.c b/src/chdelta.c
index e627cbf19..f87aec5a9 100644
--- a/src/chdelta.c
+++ b/src/chdelta.c
@@ -39,7 +39,8 @@ void chVTInit(void) {
 /**

  * Enables a virtual timer.

  * @param vtp the \p VirtualTimer structure pointer

- * @param time the number of time ticks

+ * @param time the number of time ticks, the value zero is allowed with

+ *             meaning "infinite".

  * @param vtfunc the timer callback function. After invoking the callback

  *               the timer is disabled and the structure can be disposed or

  *               reused.

@@ -48,21 +49,23 @@ void chVTInit(void) {
  * @note The associated function is invoked by an interrupt handler.

  */

 void chVTSetI(VirtualTimer *vtp, t_time time, t_vtfunc vtfunc, void *par) {

-  VirtualTimer *p;

 

   vtp->vt_func = vtfunc;

   vtp->vt_par = par;

-  p = dlist.dl_next;

-  while (p->vt_dtime < time) {

-    time -= p->vt_dtime;

-    p = p->vt_next;

-  }

 

-  vtp->vt_prev = (vtp->vt_next = p)->vt_prev;

-  vtp->vt_prev->vt_next = p->vt_prev = vtp;

-  vtp->vt_dtime = time;

-  if (p != (VirtualTimer *)&dlist)

-    p->vt_dtime -= time;

+  if (time) {

+    VirtualTimer *p = dlist.dl_next;

+    while (p->vt_dtime < time) {

+      time -= p->vt_dtime;

+      p = p->vt_next;

+    }

+

+    vtp->vt_prev = (vtp->vt_next = p)->vt_prev;

+    vtp->vt_prev->vt_next = p->vt_prev = vtp;

+    vtp->vt_dtime = time;

+    if (p != (VirtualTimer *)&dlist)

+      p->vt_dtime -= time;

+  }

 }

 

 /**