Fix `is_x86_64` on Linux 32-bit x86-64 server

Cargo.lock

@@ -68,7 +68,7 @@ dependencies = [
 
 [[package]]
 name = "gmod"
-version = "0.1.2"
+version = "0.1.3"
 dependencies = [
  "cstr",
  "ctor",

gmod/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "gmod"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["William Venner <william@venner.io>"]
 edition = "2018"
 license = "MIT"

gmod/src/lib.rs

@@ -18,9 +18,15 @@ pub mod hax;
 
 /// Returns whether this client is running the x86-64 branch
 ///
-/// Current implementation checks the LuaJIT version exported by lua_shared
+/// Current implementation checks the contents of the bin/ directory, so this is a blocking operation and requires syscalls, use sparingly
 pub fn is_x86_64() -> bool {
-	lua::LUA_SHARED.x86_64
+	use std::path::PathBuf;
+	#[cfg(target_os = "linux")] {
+		PathBuf::from("bin/linux64").is_dir()
+	}
+	#[cfg(target_os = "windows")] {
+		PathBuf::from("bin/win64").is_dir()
+	}
 }
 
 /// Opens & returns a shared library loaded by Garry's Mod using the raw path to the module.

gmod/src/lua/import.rs

@@ -73,8 +73,6 @@ lazy_static::lazy_static! {
 }
 
 pub(crate) struct LuaShared {
-	pub x86_64: bool,
-
 	pub lual_loadfile: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, path: LuaString) -> i32>,
 	pub lual_loadstring: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, path: LuaString) -> i32>,
 	pub lua_getfield: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, index: i32, k: LuaString)>,
@@ -134,8 +132,6 @@ impl LuaShared {
 			}
 
 			Self {
-				x86_64: library.get::<unsafe extern "C-unwind" fn()>(b"luaJIT_version_2_1_0_beta3\0").is_ok(),
-
 				lual_loadfile: find_symbol!("luaL_loadfile"),
 				lual_loadstring: find_symbol!("luaL_loadstring"),
 				lua_getfield: find_symbol!("lua_getfield"),