From Lua 5.3: Add lua_isyieldable().

Contributed by François Perrad.
eugeneia · Aug 13, 2017 · 9a520cb · 9a520cb
1 parent f1264bf
commit 9a520cb
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diff --git a/src/lj_api.c b/src/lj_api.c
@@ -1069,6 +1069,11 @@ LUALIB_API int luaL_callmeta(lua_State *L, int idx, const char *field)
 
 /* -- Coroutine yield and resume ------------------------------------------ */
 
+LUA_API int lua_isyieldable(lua_State *L)
+{
+  return cframe_canyield(L->cframe);
+}
+
 LUA_API int lua_yield(lua_State *L, int nresults)
 {
   void *cf = L->cframe;

diff --git a/src/lua.h b/src/lua.h
@@ -351,6 +351,9 @@ LUA_API int lua_loadx (lua_State *L, lua_Reader reader, void *dt,
 LUA_API const lua_Number *lua_version (lua_State *L);
 LUA_API void lua_copy (lua_State *L, int fromidx, int toidx);
 
+/* From Lua 5.3. */
+LUA_API int lua_isyieldable (lua_State *L);
+
 
 struct lua_Debug {
   int event;