Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/rustix/benches/mod.rs

@@ -0,0 +1,217 @@
+//! Benchmarks for rustix.
+//!
+//! To enable these benchmarks, add `--cfg=criterion` to RUSTFLAGS and enable
+//! the "fs", "time", and "process" cargo features.
+//!
+//! ```sh
+//! RUSTFLAGS=--cfg=criterion cargo bench --features=fs,time,process,stdio
+//! ```
+
+#[cfg(any(
+    not(criterion),
+    not(feature = "fs"),
+    not(feature = "process"),
+    not(feature = "time"),
+    not(feature = "stdio"),
+    windows,
+    target_os = "emscripten",
+    target_os = "redox",
+    target_os = "wasi",
+))]
+fn main() {
+    unimplemented!(
+        "Add --cfg=criterion to RUSTFLAGS and enable the \"fs\", \"time\", \"process\", and \"stdio\" cargo \
+         features."
+    )
+}
+
+#[cfg(not(any(
+    not(criterion),
+    not(feature = "fs"),
+    not(feature = "process"),
+    not(feature = "time"),
+    not(feature = "stdio"),
+    windows,
+    target_os = "emscripten",
+    target_os = "redox",
+    target_os = "wasi",
+)))]
+use criterion::{criterion_group, criterion_main};
+
+#[cfg(not(any(
+    not(criterion),
+    not(feature = "fs"),
+    not(feature = "process"),
+    not(feature = "time"),
+    not(feature = "stdio"),
+    windows,
+    target_os = "emscripten",
+    target_os = "redox",
+    target_os = "wasi",
+)))]
+mod suite {
+    use criterion::Criterion;
+
+    pub(super) fn simple_statat(c: &mut Criterion) {
+        use rustix::fs::{statat, AtFlags, CWD};
+
+        c.bench_function("simple statat", |b| {
+            b.iter(|| {
+                statat(CWD, "/", AtFlags::empty()).unwrap();
+            })
+        });
+    }
+
+    pub(super) fn simple_statat_libc(c: &mut Criterion) {
+        c.bench_function("simple statat libc", |b| {
+            b.iter(|| {
+                let mut s = std::mem::MaybeUninit::<libc::stat>::uninit();
+                unsafe {
+                    assert_eq!(
+                        libc::fstatat(
+                            libc::AT_FDCWD,
+                            std::ffi::CString::new("/").unwrap().as_c_str().as_ptr() as _,
+                            s.as_mut_ptr(),
+                            0
+                        ),
+                        0
+                    );
+                }
+            })
+        });
+    }
+
+    pub(super) fn simple_statat_libc_cstr(c: &mut Criterion) {
+        c.bench_function("simple statat libc cstr", |b| {
+            b.iter(|| {
+                let mut s = std::mem::MaybeUninit::<libc::stat>::uninit();
+                unsafe {
+                    assert_eq!(
+                        libc::fstatat(
+                            libc::AT_FDCWD,
+                            rustix::cstr!("/").as_ptr() as _,
+                            s.as_mut_ptr(),
+                            0
+                        ),
+                        0
+                    );
+                }
+            })
+        });
+    }
+
+    pub(super) fn simple_statat_cstr(c: &mut Criterion) {
+        use rustix::fs::{statat, AtFlags, CWD};
+
+        c.bench_function("simple statat cstr", |b| {
+            b.iter(|| {
+                statat(CWD, rustix::cstr!("/"), AtFlags::empty()).unwrap();
+            })
+        });
+    }
+
+    pub(super) fn simple_fstat(c: &mut Criterion) {
+        use rustix::fs::fstat;
+
+        c.bench_function("simple fstat", |b| {
+            b.iter(|| {
+                fstat(rustix::stdio::stdin()).unwrap();
+            })
+        });
+    }
+
+    pub(super) fn simple_fstat_libc(c: &mut Criterion) {
+        c.bench_function("simple fstat libc", |b| {
+            b.iter(|| {
+                let mut s = std::mem::MaybeUninit::<libc::stat>::uninit();
+                unsafe {
+                    assert_eq!(libc::fstat(libc::STDIN_FILENO, s.as_mut_ptr()), 0);
+                }
+            })
+        });
+    }
+
+    #[cfg(not(target_os = "wasi"))]
+    pub(super) fn simple_clock_gettime(c: &mut Criterion) {
+        use rustix::time::{clock_gettime, ClockId};
+
+        c.bench_function("simple clock_gettime", |b| {
+            b.iter(|| {
+                let _ = clock_gettime(ClockId::Monotonic);
+            })
+        });
+    }
+
+    #[cfg(not(target_os = "wasi"))]
+    pub(super) fn simple_clock_gettime_libc(c: &mut Criterion) {
+        c.bench_function("simple clock_gettime libc", |b| {
+            b.iter(|| {
+                let mut s = std::mem::MaybeUninit::<libc::timespec>::uninit();
+                unsafe {
+                    assert_eq!(
+                        libc::clock_gettime(libc::CLOCK_MONOTONIC, s.as_mut_ptr()),
+                        0
+                    );
+                    let _ = s.assume_init();
+                }
+            })
+        });
+    }
+
+    #[cfg(not(target_os = "wasi"))]
+    pub(super) fn simple_getpid(c: &mut Criterion) {
+        use rustix::process::getpid;
+
+        c.bench_function("simple getpid", |b| {
+            b.iter(|| {
+                let _ = getpid();
+            })
+        });
+    }
+
+    #[cfg(not(target_os = "wasi"))]
+    pub(super) fn simple_getpid_libc(c: &mut Criterion) {
+        c.bench_function("simple getpid libc", |b| {
+            b.iter(|| unsafe {
+                let _ = libc::getpid();
+            })
+        });
+    }
+}
+
+#[cfg(not(any(
+    not(criterion),
+    not(feature = "fs"),
+    not(feature = "process"),
+    not(feature = "time"),
+    not(feature = "stdio"),
+    windows,
+    target_os = "emscripten",
+    target_os = "redox",
+    target_os = "wasi",
+)))]
+criterion_group!(
+    benches,
+    suite::simple_statat,
+    suite::simple_statat_libc,
+    suite::simple_statat_libc_cstr,
+    suite::simple_statat_cstr,
+    suite::simple_fstat,
+    suite::simple_fstat_libc,
+    suite::simple_clock_gettime,
+    suite::simple_clock_gettime_libc,
+    suite::simple_getpid,
+    suite::simple_getpid_libc
+);
+#[cfg(not(any(
+    not(criterion),
+    not(feature = "fs"),
+    not(feature = "process"),
+    not(feature = "time"),
+    not(feature = "stdio"),
+    windows,
+    target_os = "emscripten",
+    target_os = "redox",
+    target_os = "wasi",
+)))]
+criterion_main!(benches);