| 802 | |
| 803 | |
| 804 | LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs, |
| 805 | int *nresults) { |
| 806 | int status; |
| 807 | lua_lock(L); |
| 808 | if (L->status == LUA_OK) { /* may be starting a coroutine */ |
| 809 | if (L->ci != &L->base_ci) /* not in base level? */ |
| 810 | return resume_error(L, "cannot resume non-suspended coroutine", nargs); |
| 811 | else if (L->top - (L->ci->func + 1) == nargs) /* no function? */ |
| 812 | return resume_error(L, "cannot resume dead coroutine", nargs); |
| 813 | } |
| 814 | else if (L->status != LUA_YIELD) /* ended with errors? */ |
| 815 | return resume_error(L, "cannot resume dead coroutine", nargs); |
| 816 | L->nCcalls = (from) ? getCcalls(from) : 0; |
| 817 | if (getCcalls(L) >= LUAI_MAXCCALLS) |
| 818 | return resume_error(L, "C stack overflow", nargs); |
| 819 | L->nCcalls++; |
| 820 | luai_userstateresume(L, nargs); |
| 821 | api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs); |
| 822 | status = luaD_rawrunprotected(L, resume, &nargs); |
| 823 | /* continue running after recoverable errors */ |
| 824 | status = precover(L, status); |
| 825 | if (l_likely(!errorstatus(status))) |
| 826 | lua_assert(status == L->status); /* normal end or yield */ |
| 827 | else { /* unrecoverable error */ |
| 828 | L->status = cast_byte(status); /* mark thread as 'dead' */ |
| 829 | luaD_seterrorobj(L, status, L->top); /* push error message */ |
| 830 | L->ci->top = L->top; |
| 831 | } |
| 832 | *nresults = (status == LUA_YIELD) ? L->ci->u2.nyield |
| 833 | : cast_int(L->top - (L->ci->func + 1)); |
| 834 | lua_unlock(L); |
| 835 | return status; |
| 836 | } |
| 837 | |
| 838 | |
| 839 | LUA_API int lua_isyieldable (lua_State *L) { |
no test coverage detected