Add API `mrb_atexit()`.

`mrb_final_mrbgems` will be called as mrb_state atexit function.
Maybe useful in #1844.

1 files changed, 7 insertions, 0 deletions

diff --git a/include/mruby.h b/include/mruby.h
index db3b06aa8..368bf1beb 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -102,6 +102,8 @@ enum gc_state {
 
 struct mrb_jmpbuf;
 
+typedef void (*mrb_atexit_func)(struct mrb_state*);
+
 typedef struct mrb_state {
   struct mrb_jmpbuf *jmp;
 
@@ -169,6 +171,9 @@ typedef struct mrb_state {
   struct RClass *eStandardError_class;
 
   void *ud; /* auxiliary data */
+
+  mrb_atexit_func *atexit_stack;
+  mrb_int atexit_stack_len;
 } mrb_state;
 
 #if __STDC_VERSION__ >= 201112L
@@ -413,6 +418,8 @@ void* mrb_pool_realloc(struct mrb_pool*, void*, size_t oldlen, size_t newlen);
 mrb_bool mrb_pool_can_realloc(struct mrb_pool*, void*, size_t);
 void* mrb_alloca(mrb_state *mrb, size_t);
 
+void mrb_atexit(mrb_state *mrb, mrb_atexit_func func);
+
 #ifdef MRB_DEBUG
 #include <assert.h>
 #define mrb_assert(p) assert(p)