From ea28dc4f4c42a9f736aab9a9bf9c4c9befe05f0d Mon Sep 17 00:00:00 2001
From: Nilstrieb <48135649+Nilstrieb@users.noreply.github.com>
Date: Tue, 25 Jan 2022 09:03:28 +0100
Subject: [PATCH] yeah what a great idea

---
 .gitignore |   2 +
 Cargo.lock | 114 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml |   9 +++++
 src/lib.rs |  46 +++++++++++++++++++++
 4 files changed, 171 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2a0038a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+.idea
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..6c2faeb
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,114 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.113"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eef78b64d87775463c549fbd80e19249ef436ea3bf1de2a1eb7e717ec7fab1e9"
+
+[[package]]
+name = "lock_api"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712a4d093c9976e24e7dbca41db895dabcbac38eb5f4045393d17a95bdfb1109"
+dependencies = [
+ "scopeguard",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
+dependencies = [
+ "instant",
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d76e8e1493bcac0d2766c42737f34458f1c8c50c0d23bcb24ea953affb273216"
+dependencies = [
+ "cfg-if",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "winapi",
+]
+
+[[package]]
+name = "pythonic_global_lock"
+version = "0.1.0"
+dependencies = [
+ "parking_lot",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8383f39639269cde97d255a32bdb68c047337295414940c68bdd30c2e13203ff"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "smallvec"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..19e2937
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "pythonic_global_lock"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+parking_lot = "0.11.2"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..2915df9
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,46 @@
+use parking_lot::lock_api::{MutexGuard, RawMutex};
+use parking_lot::Mutex;
+use std::cell::UnsafeCell;
+use std::ops::{Deref, DerefMut};
+
+static LOCK: Mutex<()> = Mutex::const_new(RawMutex::INIT, ());
+
+pub struct GLock<T> {
+    inner: UnsafeCell<T>,
+}
+
+impl<T> GLock<T> {
+    pub fn lock(&self) -> GLockGuard<T> {
+        let mutex_guard = LOCK.lock();
+        // SAFETY: We have the global lock
+        let value = unsafe { &mut *self.inner.get() };
+        GLockGuard { value, mutex_guard }
+    }
+
+    pub fn get_mut(&mut self) -> &mut T {
+        self.inner.get_mut()
+    }
+
+    pub fn into_inner(self) -> T {
+        self.inner.into_inner()
+    }
+}
+
+struct GLockGuard<'a, T> {
+    value: &'a mut T,
+    mutex_guard: MutexGuard<'a, parking_lot::RawMutex, ()>,
+}
+
+impl<'a, T> Deref for GLockGuard<'a, T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        self.value
+    }
+}
+
+impl<'a, T> DerefMut for GLockGuard<'_, T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.value
+    }
+}