From 2aac7ab959ca9856108acc2e46c6c75a017ef41b Mon Sep 17 00:00:00 2001
From: Wez Furlong <wez@wezfurlong.org>
Date: Wed, 22 Jan 2020 17:40:58 -0800
Subject: Agent, Sftp and File are now Send + Sync

---
 src/agent.rs |  6 ++++++
 src/sftp.rs  | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/agent.rs b/src/agent.rs
index dbafb1d..85ba4e6 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -14,6 +14,12 @@ pub struct Agent {
     sess: Arc<Mutex<SessionInner>>,
 }
 
+// Agent is both Send and Sync; the compiler can't see it because it
+// is pessimistic about the raw pointer.  We use Arc/Mutex to guard accessing
+// the raw pointer so we are safe for both.
+unsafe impl Send for Agent {}
+unsafe impl Sync for Agent {}
+
 /// A public key which is extracted from an SSH agent.
 #[derive(Debug, PartialEq, Eq)]
 pub struct PublicKey {
diff --git a/src/sftp.rs b/src/sftp.rs
index 25c3a74..491b447 100644
--- a/src/sftp.rs
+++ b/src/sftp.rs
@@ -14,6 +14,12 @@ struct SftpInner {
     sess: Arc<Mutex<SessionInner>>,
 }
 
+// Sftp is both Send and Sync; the compiler can't see it because it
+// is pessimistic about the raw pointer.  We use Arc/Mutex to guard accessing
+// the raw pointer so we are safe for both.
+unsafe impl Send for Sftp {}
+unsafe impl Sync for Sftp {}
+
 /// A handle to a remote filesystem over SFTP.
 ///
 /// Instances are created through the `sftp` method on a `Session`.
@@ -31,6 +37,12 @@ struct FileInner {
     sftp: Arc<SftpInner>,
 }
 
+// FileInner is both Send and Sync; the compiler can't see it because it
+// is pessimistic about the raw pointer.  We use Arc/Mutex to guard accessing
+// the raw pointer so we are safe for both.
+unsafe impl Send for FileInner {}
+unsafe impl Sync for FileInner {}
+
 struct LockedFile<'file> {
     sess: MutexGuard<'file, SessionInner>,
     raw: *mut raw::LIBSSH2_SFTP_HANDLE,
-- 
cgit v1.2.3