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datastructures: replace lazy_static by SyncLazy from std

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This commit is contained in:
marmeladema 2020-08-30 11:48:50 +01:00
parent bd49eec3d7
commit 1b650d0fea
3 changed files with 25 additions and 29 deletions
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1
Cargo.lock
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@ -3417,7 +3417,6 @@ dependencies = [
"ena",
"indexmap",
"jobserver",
"lazy_static",
"libc",
"measureme",
"parking_lot 0.10.2",

1
compiler/rustc_data_structures/Cargo.toml
View File

@ -12,7 +12,6 @@ ena = "0.14"
indexmap = "1.5.1"
tracing = "0.1"
jobserver_crate = { version = "0.1.13", package = "jobserver" }
lazy_static = "1"
rustc_serialize = { path = "../rustc_serialize" }
rustc_macros = { path = "../rustc_macros" }
rustc_graphviz = { path = "../rustc_graphviz" }

8
compiler/rustc_data_structures/src/jobserver.rs
View File

@ -1,7 +1,6 @@
pub use jobserver_crate::Client;
use lazy_static::lazy_static;
use std::lazy::SyncLazy;
lazy_static! {
// We can only call `from_env` once per process
// Note that this is unsafe because it may misinterpret file descriptors
@ -19,15 +18,14 @@
// Also note that we stick this in a global because there could be
// multiple rustc instances in this process, and the jobserver is
// per-process.
static ref GLOBAL_CLIENT: Client = unsafe {
static GLOBAL_CLIENT: SyncLazy<Client> = SyncLazy::new(|| unsafe {
Client::from_env().unwrap_or_else(|| {
let client = Client::new(32).expect("failed to create jobserver");
// Acquire a token for the main thread which we can release later
client.acquire_raw().ok();
client
})
};
}
});
pub fn client() -> Client {
GLOBAL_CLIENT.clone()