ensure command alignment is correct

2021-10-28 08:40:18 +02:00
parent 3f1378ab2e
commit e313eb0e2e
1 changed files with 3 additions and 0 deletions
@@ -1,6 +1,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdalign.h>

 #include <lauxlib.h>
 #include "rencache.h"
@@ -84,6 +85,8 @@ static RenRect merge_rects(RenRect a, RenRect b) {


 static Command* push_command(int type, int size) {
+  size_t alignment = alignof(max_align_t) - 1;
+  size = (size + alignment) & ~alignment;
  Command *cmd = (Command*) (command_buf + command_buf_idx);
  int n = command_buf_idx + size;
  if (n > COMMAND_BUF_SIZE) {