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util.ringbuffer: Prevent creation of zero-size buffer

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Kim Alvefur 2020-05-29 18:11:42 +02:00
parent 838f8ebd5b
commit 0bb1474ce6
2 changed files with 6 additions and 0 deletions
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util-src/ringbuffer.c
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@ -198,6 +198,7 @@ static int rb_free(lua_State *L) {
static int rb_new(lua_State *L) {
size_t size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
luaL_argcheck(L, size > 0, 1, "positive integer expected");
ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size);
b->rpos = 0;