From 727d3541a122795b405208242e6fdf7f8b5add07 Mon Sep 17 00:00:00 2001
From: ame <amelia@amyy.cc>
Date: Mon, 29 Jun 2026 05:48:58 -0500
Subject: :detatch fix and math.random

---
 docs/readme.md           |  4 ++++
 library/lullaby/math.lua |  9 +++++++++
 src/math.c               | 17 +++++++++++++++++
 src/math.h               |  2 ++
 src/reg.c                |  2 ++
 src/thread.c             |  2 +-
 6 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/docs/readme.md b/docs/readme.md
index 83c02e5..c1f2bb0 100644
--- a/docs/readme.md
+++ b/docs/readme.md
@@ -2,6 +2,10 @@
 
 > all files besides this and the content of net/ are out of date! ill be working on them later
 
+# dont use lua builtin random!!!!!!
+
+> lullaby provides its own random function llby.math.random(M?, N?). for now atleast you may run into issues using the builtin math.random when multithreading, this may affect some other lua utils
+
 (name subject to change)
 
 with the library in the same directory [(or one of the other valid search locations)](https://www.lua.org/pil/8.1.html)
diff --git a/library/lullaby/math.lua b/library/lullaby/math.lua
index 2914a56..487a3c5 100644
--- a/library/lullaby/math.lua
+++ b/library/lullaby/math.lua
@@ -7,4 +7,13 @@ local math = {}
 ---@return integer
 function math.lcm(N) end
 
+---all results are inclusive
+---() : from 0.0 to 1.0
+---(M) : from 1 to M
+---(M, N) : from M to N
+---@param M integer?
+---@param N integer?
+---@return integer|number
+function math.random(M, N) end
+
 return math
diff --git a/src/math.c b/src/math.c
index 3e36e3b..75cd578 100644
--- a/src/math.c
+++ b/src/math.c
@@ -46,3 +46,20 @@ int l_lcm(lua_State* L){
   free(nums);
   return 1;
 }
+
+int l_random(lua_State* L){
+  size_t min = 1;
+  switch(lua_gettop(L)){
+    case 2:
+      min = lua_tointeger(L, 1);
+      lua_remove(L, 1);
+    case 1:
+      lua_pushinteger(L, (rand() % (lua_tointeger(L, 1) - min + 1)) + min);
+      break;
+    case 0:
+    default:
+      lua_pushnumber(L, (double)rand() / (double)RAND_MAX);
+  }
+
+  return 1;
+}
diff --git a/src/math.h b/src/math.h
index 17e477e..7731831 100644
--- a/src/math.h
+++ b/src/math.h
@@ -3,11 +3,13 @@
 
 int l_lcm(lua_State*);
 int l_gcd(lua_State*);
+int l_random(lua_State*);
 
 #define clean_lullaby_math luaI_nothing
 
 static const luaL_Reg math_function_list [] = {
   {"lcm",l_lcm},
+  {"random",l_random},
   //{"gcd",l_gcd},
 
   {NULL,NULL}
diff --git a/src/reg.c b/src/reg.c
index b90e03d..c57cdf7 100644
--- a/src/reg.c
+++ b/src/reg.c
@@ -8,6 +8,7 @@
 #include "test.h"
 #include "config.h"
 #include "lullaby.h"
+#include <time.h>
 
 #define open_common(name, config)\
   int luaopen_lullaby_##name (lua_State* L){\
@@ -38,6 +39,7 @@ lua_settable(L, T);
 
 
 int luaopen_lullaby(lua_State* L) { 
+  srand(time(NULL));
   lua_newtable(L);
   int top = lua_gettop(L);
 
diff --git a/src/thread.c b/src/thread.c
index cd2eb5f..f34f314 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -213,7 +213,7 @@ int _thread_detach(lua_State* L){
   lua_pushstring(L, "_");
   lua_gettable(L, 1);
   struct thread_info* info = lua_touserdata(L, -1);
-  lua_getmetatable(L, -1);
+  lua_getmetatable(L, 1);
   int idx = lua_gettop(L);
 
   luaI_tsetnil(L, idx, "__gc");
-- 
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