settings editor, and lots of changes in service of that

1 files changed, 14 insertions, 0 deletions

diff --git a/src/user/knob/heap.c b/src/user/knob/heap.c
index b770542..6e57000 100644
--- a/src/user/knob/heap.c
+++ b/src/user/knob/heap.c
@@ -25,8 +25,18 @@ static void add_header(struct block_header *bh) {
   first_block = bh;
 }
 
+//static const char *const hextab = "0123456789abcdef";
+//static char *const get_debug = "getting 0x........ byte block";
+//static char *const free_debug = "freeing 0x........ byte block";
+
 __attribute__ ((malloc))
 void *get_block(uint32_t bytes) {
+  if (!bytes)
+    return 0;
+//for (uint8_t i = 0; i < 8; ++i)
+//  get_debug[10 + 7 - i] = hextab[(bytes >> (i * 4)) & 0xf];
+//_system_log(get_debug);
+
   struct block_header *header = 0;
   for (struct block_header *ptr = first_block; ptr; ptr = ptr->next) {
     if (ptr->allocated)
@@ -88,6 +98,10 @@ static void remove_header(struct block_header *bh) {
 void free_block(void *block) {
   struct block_header *header = block - sizeof(struct block_header);
 
+//for (uint8_t i = 0; i < 8; ++i)
+//  free_debug[10 + 7 - i] = hextab[(header->length >> (i * 4)) & 0xf];
+//_system_log(free_debug);
+
   header->allocated = false;
 
   void *after = block + header->length;