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Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
c30d18b10d
Adds `scheduler::spawn_dedicated_thread` (and inherent `spawn_dedicated` methods on `PlatformScheduler` and `TestScheduler`) so single-threaded actors that own `!Send` state can run on their own OS thread and freely do blocking I/O without disturbing any other executor. ### Why A single-threaded actor that needs to do blocking syscalls is currently stuck: it can't run on the shared foreground executor (blocking would stall every other foreground session), and it can't move to the background pool because its state isn't `Send`. `spawn_dedicated` gives each such actor its own thread and its own `LocalExecutor`, while still participating in the same testable scheduler infrastructure as everything else. ### Shape - `pub fn spawn_dedicated_thread(session_id, scheduler, f) -> Task<_>` in `scheduler`. Owns the OS thread, the per-session runnable channel, and the `LocalExecutor` setup. - Inherent `spawn_dedicated` on `PlatformScheduler` (allocates its own `SessionId`, delegates to the free function). - Inherent `spawn_dedicated` on `TestScheduler` (no real thread — runs as a fresh local session driven by the test scheduler's run loop, so determinism under `many` is preserved). - Renames `Scheduler::schedule_foreground` → `schedule_local` and `scheduler::ForegroundExecutor` → `scheduler::LocalExecutor` to reflect that these are session-pinned queues rather than "the main thread" (a dedicated session runs on its own thread). GPUI's wrapper `gpui::ForegroundExecutor` and the `foreground_executor` field/method names are unchanged to keep blast radius small. - `LocalExecutor::new` now takes an explicit dispatch closure, so the routing decision (default session, dedicated thread, or something else) lives at the construction site. ### Tests - `TestScheduler` side: round-trip, `!Send` future, `Send` closure capturing shared state, inner `executor.spawn`, determinism under `many` seeds, drop-cancels-future, detached child runs after root completes. - `PlatformScheduler` side: real separate thread (blocking syscalls don't stall the test), `!Send` future output, drop-cancels-future, thread tears down after work completes, detached child outlives root. cc @as-cii Release Notes: - N/A --------- Co-authored-by: Antonio Scandurra <me@as-cii.com> Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com> |
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| .cargo | ||
| .cloudflare | ||
| .config | ||
| .factory | ||
| .github | ||
| .zed | ||
| assets | ||
| ci | ||
| crates | ||
| docs | ||
| extensions | ||
| legal | ||
| nix | ||
| script | ||
| tooling | ||
| .git-blame-ignore-revs | ||
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| .mailmap | ||
| .prettierrc | ||
| .rules | ||
| AGENTS.md | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CLAUDE.md | ||
| clippy.toml | ||
| CODE_OF_CONDUCT.md | ||
| compose.yml | ||
| CONTRIBUTING.md | ||
| debug.plist | ||
| default.nix | ||
| Dockerfile-collab | ||
| Dockerfile-collab.dockerignore | ||
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| Dockerfile-distros | ||
| Dockerfile-distros.dockerignore | ||
| flake.lock | ||
| flake.nix | ||
| GEMINI.md | ||
| LICENSE-APACHE | ||
| LICENSE-GPL | ||
| livekit.yaml | ||
| lychee.toml | ||
| Procfile | ||
| Procfile.all | ||
| Procfile.web | ||
| README.md | ||
| renovate.json | ||
| REVIEWERS.conl | ||
| rust-toolchain.toml | ||
| rustfmt.toml | ||
| shell.nix | ||
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Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking discussion)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.