allow pop without dest

circbuf_deque/circbuf.c

@@ -107,14 +107,17 @@ bool cbuf_push(CircBuf *cb, const void *source)
 /** Pop one element from the front_writepos */
 bool cbuf_pop(CircBuf *cb, void *dest)
 {
-    if (cb == NULL || dest == NULL || cb->num_used == 0) {
+    if (cb == NULL || cb->num_used == 0) {
         return false;
     }
 
     cb->num_used--;
 
     circbuf_size_t f = front_writepos(cb);
+
+    if (dest != NULL) {
         read_buffer(cb, f, dest);
+    }
 
 #ifdef CIRCBUF_ZERO_FREE_SLOTS
     memset(PV_OFFS(cb->buf, cb->elem_size, f), 0, cb->elem_size);
@@ -196,11 +199,13 @@ bool cbuf_push_back(CircBuf *cb, const void *source)
 /** Pop one element from the back */
 bool cbuf_pop_back(CircBuf *cb, void *dest)
 {
-    if (cb == NULL || dest == NULL || cb->num_used == 0) {
+    if (cb == NULL || cb->num_used == 0) {
         return false;
     }
 
+    if (dest != NULL) {
         read_buffer(cb, cb->back, dest);
+    }
 
 #ifdef CIRCBUF_ZERO_FREE_SLOTS
     memset(PV_OFFS(cb->buf, cb->elem_size, cb->back), 0, cb->elem_size);