From f2f64da50aad67cfe650045f96dc7f00417a1e1c Mon Sep 17 00:00:00 2001
From: Ian Chamberlain <ian.h.chamberlain@gmail.com>
Date: Wed, 2 Feb 2022 22:47:06 -0500
Subject: [PATCH 1/2] Add basic Ps module which only has init()

---
 ctru-rs/src/services/mod.rs |  1 +
 ctru-rs/src/services/ps.rs  | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 ctru-rs/src/services/ps.rs

diff --git a/ctru-rs/src/services/mod.rs b/ctru-rs/src/services/mod.rs
index 7a0e194..2159e9e 100644
--- a/ctru-rs/src/services/mod.rs
+++ b/ctru-rs/src/services/mod.rs
@@ -2,6 +2,7 @@ pub mod apt;
 pub mod fs;
 pub mod gspgpu;
 pub mod hid;
+pub mod ps;
 pub mod soc;
 pub mod sslc;
 
diff --git a/ctru-rs/src/services/ps.rs b/ctru-rs/src/services/ps.rs
new file mode 100644
index 0000000..a20e47e
--- /dev/null
+++ b/ctru-rs/src/services/ps.rs
@@ -0,0 +1,21 @@
+#[non_exhaustive]
+pub struct Ps;
+
+impl Ps {
+    pub fn init() -> crate::Result<Self> {
+        let r = unsafe { ctru_sys::psInit() };
+        if r < 0 {
+            Err(r.into())
+        } else {
+            Ok(Self)
+        }
+    }
+}
+
+impl Drop for Ps {
+    fn drop(&mut self) {
+        unsafe {
+            ctru_sys::psExit();
+        }
+    }
+}

From cb15f994866ea6bcbc5c8bf9e763422d2168b648 Mon Sep 17 00:00:00 2001
From: Ian Chamberlain <ian.h.chamberlain@gmail.com>
Date: Wed, 2 Feb 2022 23:04:07 -0500
Subject: [PATCH 2/2] Add docstring for PS module

---
 ctru-rs/src/services/ps.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ctru-rs/src/services/ps.rs b/ctru-rs/src/services/ps.rs
index a20e47e..5e9adfa 100644
--- a/ctru-rs/src/services/ps.rs
+++ b/ctru-rs/src/services/ps.rs
@@ -1,7 +1,15 @@
+//! Process Services (PS) module. This is used for miscellaneous utility tasks, but
+//! is particularly important because it is used to generate random data, which
+//! is required for common things like [`HashMap`](std::collections::HashMap).
+//! See also <https://www.3dbrew.org/wiki/Process_Services>
+
+/// PS handle. This must not be dropped in order for random generation
+/// to work (in most cases, the lifetime of an application).
 #[non_exhaustive]
 pub struct Ps;
 
 impl Ps {
+    /// Initialize the PS module.
     pub fn init() -> crate::Result<Self> {
         let r = unsafe { ctru_sys::psInit() };
         if r < 0 {