refactor(fspy): own macOS shared-memory mapping

Co-authored-by: GPT-5.6 <gpt-5.6@openai.com>

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: wan9chi

Cargo.lock

@@ -123,7 +123,6 @@ serde = "1.0.219"
 serde_json = "1.0.140"
 serde_norway = "0.9.42"
 sha2 = "0.11.0"
-shared_memory = "0.12.4"
 shell-escape = "0.1.5"
 similar = "3.0.0"
 smallvec = { version = "2.0.0-alpha.12", features = ["std"] }

Cargo.toml

@@ -118,7 +118,7 @@ impl Deref for Sender {
 }
 
 #[cfg_attr(
-    not(target_os = "linux"),
+    target_os = "windows",
     expect(
         clippy::non_send_fields_in_send_ty,
         reason = "`Sender` holds a shared file lock that ensures there's no reader, so `shm` can be safely written to"
@@ -139,7 +139,7 @@ pub struct Receiver {
 }
 
 #[cfg_attr(
-    not(target_os = "linux"),
+    target_os = "windows",
     expect(
         clippy::non_send_fields_in_send_ty,
         reason = "Receiver doesn't read or write `shm`. It only passes it to `ReceiverLockGuard` under the lock"

crates/fspy_shared/src/ipc/channel/mod.rs

@@ -7,9 +7,6 @@ license.workspace = true
 publish = false
 rust-version.workspace = true
 
-[target.'cfg(not(any(target_os = "linux", target_os = "windows")))'.dependencies]
-shared_memory = { workspace = true, features = ["logging"] }
-
 [target.'cfg(target_os = "linux")'.dependencies]
 base64 = { workspace = true }
 memmap2 = { workspace = true }
@@ -19,6 +16,11 @@ tokio-util = { workspace = true }
 tracing = { workspace = true }
 uuid = { workspace = true, features = ["v4"] }
 
+[target.'cfg(target_os = "macos")'.dependencies]
+memmap2 = { workspace = true }
+rustix = { workspace = true, features = ["fs", "param", "shm"] }
+uuid = { workspace = true, features = ["v4"] }
+
 [target.'cfg(target_os = "windows")'.dependencies]
 base64 = { workspace = true }
 uuid = { workspace = true, features = ["v4"] }