Unite with prev memory block

axl_memory.c

@@ -109,4 +109,21 @@ void axl_free(void* ptr)
         block->size += next_block->size + MB_HEADER_SIZE;
         block->next = next_block->next;
     }
+
+    if(block != root)
+    {
+        for(mb_header* mb = root; mb != NULL; mb = mb->next)
+        {
+            if(mb->next == block)
+            {
+                if(mb->is_free)
+                {
+                    mb_header* prev_free_mb = mb;
+                    prev_free_mb->size += block->size + MB_HEADER_SIZE;
+                    prev_free_mb->next = block->next;
+                }
+                break;
+            }
+        }
+    }
 }

main.c

@@ -1,15 +1,18 @@
 #include "axl.h"
 #include <windows.h>
 
-int _start(void)  // Entry point on Linux
+int _start(void)
 {
-    MessageBoxA(NULL, "wawa", "fffff", MB_OK | MB_ICONINFORMATION);
     axl_init();
 
+    void* fds = axl_malloc(83);
+    
     int* f = axl_malloc(sizeof(int));
     *f = 4;
+    axl_free(fds);
     axl_free(f);
-   
+    
+    (void)fds;
     (void)f;
 
     Sleep(2);