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| author | bors <bors@rust-lang.org> | 2024-10-24 13:35:50 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2024-10-24 13:35:50 +0000 |
| commit | f61306d47bc98af8bb9d15f1adf6086785590a8c (patch) | |
| tree | 0500da4d67b3ec4f77a8cb011074779c5c0315fb /library/std/src/rt.rs | |
| parent | 5ae4d75effa366176dd75cd0d5662da26385cfc5 (diff) | |
| parent | 0747f2898e83df7e601189c0f31762e84328becb (diff) | |
| download | rust-f61306d47bc98af8bb9d15f1adf6086785590a8c.tar.gz rust-f61306d47bc98af8bb9d15f1adf6086785590a8c.zip | |
Auto merge of #123550 - GnomedDev:remove-initial-arc, r=Noratrieb
Remove the `Arc` rt::init allocation for thread info Removes an allocation pre-main by just not storing anything in std::thread::Thread for the main thread. - The thread name can just be a hard coded literal, as was done in #123433. - Storing ThreadId and Parker in a static that is initialized once at startup. This uses SyncUnsafeCell and MaybeUninit as this is quite performance critical and we don't need synchronization or to store a tag value and possibly leave in a panic.
Diffstat (limited to 'library/std/src/rt.rs')
| -rw-r--r-- | library/std/src/rt.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/library/std/src/rt.rs b/library/std/src/rt.rs index 80e7c3c026b..b2492238bd3 100644 --- a/library/std/src/rt.rs +++ b/library/std/src/rt.rs @@ -110,7 +110,7 @@ unsafe fn init(argc: isize, argv: *const *const u8, sigpipe: u8) { // handle does not match the current ID, we should attempt to use the // current thread ID here instead of unconditionally creating a new // one. Also see #130210. - let thread = Thread::new_main(thread::current_id()); + let thread = unsafe { Thread::new_main(thread::current_id()) }; if let Err(_thread) = thread::set_current(thread) { // `thread::current` will create a new handle if none has been set yet. // Thus, if someone uses it before main, this call will fail. That's a |