Merge pull request #88 from athenavm/cleanup/remove-lazy_static-dep

use `std::sync::LazyLock` in place of `lazy_static!`

Author: lrettig

.github/actions/setup/action.yml

@@ -27,4 +27,3 @@ runs:
       uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
         components: clippy, rustfmt
-        toolchain: nightly-2024-04-17

.github/workflows/pr.yml

@@ -47,14 +47,12 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: check
-          toolchain: nightly-2024-04-17
           args: --all-targets --all-features
 
       - name: Run cargo test
         uses: actions-rs/cargo@v1
         with:
           command: test
-          toolchain: nightly-2024-04-17
           args: --release
         env:
           RUSTFLAGS: -Copt-level=3 -Cdebug-assertions -Coverflow-checks=y -Cdebuginfo=0 -C target-cpu=native

.github/workflows/release.yml

@@ -122,7 +122,6 @@ jobs:
         id: rustc-toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: nightly-2024-05-29
           target: ${{ matrix.target }}
 
       - name: Apple M1 setup

Cargo.toml

@@ -26,5 +26,3 @@ repository = "https://github.com/athenavm/athena"
 homepage = "https://www.athenavm.org/"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-
-[workspace.dependencies]

vm/entrypoint/Cargo.toml

@@ -16,7 +16,6 @@ cfg-if = "1.0.0"
 getrandom = { version = "0.2.14", features = ["custom"] }
 serde = { version = "1.0.204", features = ["derive"] }
 rand = "0.8.5"
-lazy_static = "1.5.0"
 
 # optional
 athena-lib = { path = "../lib", optional = true }

vm/entrypoint/src/syscalls/sys.rs

@@ -1,6 +1,5 @@
-use std::sync::Mutex;
+use std::sync::{LazyLock, Mutex};
 
-use lazy_static::lazy_static;
 use rand::{rngs::StdRng, Rng, SeedableRng};
 
 use crate::syscalls::{syscall_halt, syscall_write};
@@ -10,10 +9,8 @@ use crate::syscalls::{syscall_halt, syscall_write};
 /// In the future, we can pass in this seed from the host or have the verifier generate it.
 const PRNG_SEED: u64 = 0x123456789abcdef0;
 
-lazy_static! {
-    /// A lazy static to generate a global random number generator.
-    static ref RNG: Mutex<StdRng> = Mutex::new(StdRng::seed_from_u64(PRNG_SEED));
-}
+static RNG: LazyLock<Mutex<StdRng>> =
+  LazyLock::new(|| Mutex::new(StdRng::seed_from_u64(PRNG_SEED)));
 
 /// A lazy static to print a warning once for using the `sys_rand` system call.
 static SYS_RAND_WARNING: std::sync::Once = std::sync::Once::new();