Clean up codegen

.github/workflows/ci.yml

@@ -793,7 +793,6 @@ jobs:
     steps:
       - uses: taiki-e/checkout-action@v1
       - uses: taiki-e/github-actions/install-rust@nightly
-      - run: tools/no_atomic.sh
       - run: tools/gen.sh
       - id: diff
         run: tools/ci/gen.sh

DEVELOPMENT.md

@@ -10,11 +10,11 @@
 portable-atomic/
 ├── bench/                        -- simple benchmarks
 ├── build.rs                      -- build script
-├── no_atomic.rs                  -- definitions of statics used by build script (auto-generated)
 ├── version.rs                    -- rustc version detection code used by build script
 ├── portable-atomic-util/         -- crate that defines synchronization primitives built with portable-atomic
 ├── src/
 │   ├── cfgs.rs                   -- definitions of cfg_{has,no}_* macros
+│   ├── gen/                      -- code generated by tools/gen.sh
 │   ├── imp/
 │   │   ├── atomic128/            -- 128-bit atomic implementations on 64-bit architectures (mainly by asm)
 │   │   ├── atomic64/             -- 64-bit atomic implementations on 32-bit architectures (mainly by asm)

build.rs

@@ -8,13 +8,14 @@
 mod version;
 use self::version::{rustc_version, Version};
 
-use std::{env, str};
+#[path = "src/gen/build.rs"]
+mod generated;
 
-include!("no_atomic.rs");
+use std::{env, str};
 
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");
-    println!("cargo:rerun-if-changed=no_atomic.rs");
+    println!("cargo:rerun-if-changed=src/gen/build.rs");
     println!("cargo:rerun-if-changed=version.rs");
 
     #[cfg(feature = "unsafe-assume-single-core")]
@@ -191,18 +192,18 @@ fn main() {
         } else {
             println!("cargo:rustc-cfg=portable_atomic_no_cfg_target_has_atomic");
             let target = &*convert_custom_linux_target(target);
-            if NO_ATOMIC_CAS.contains(&target) {
+            if generated::NO_ATOMIC_CAS.contains(&target) {
                 println!("cargo:rustc-cfg=portable_atomic_no_atomic_cas");
             }
-            if NO_ATOMIC_64.contains(&target) {
+            if generated::NO_ATOMIC_64.contains(&target) {
                 println!("cargo:rustc-cfg=portable_atomic_no_atomic_64");
             } else {
                 // Otherwise, assuming `"max-atomic-width" == 64` or `"max-atomic-width" == 128`.
             }
         }
     }
     // We don't need to use convert_custom_linux_target here because all linux targets have atomics.
-    if NO_ATOMIC.contains(&target) {
+    if generated::NO_ATOMIC.contains(&target) {
         println!("cargo:rustc-cfg=portable_atomic_no_atomic_load_store");
     }
 

no_atomic.rs → src/gen/build.rs

@@ -5,7 +5,7 @@
 // Note: This is the list as of nightly-2022-02-10. We don't refer to this in
 // nightly-2022-02-11+ because feature(cfg_target_has_atomic) stabilized.
 #[rustfmt::skip]
-static NO_ATOMIC_CAS: &[&str] = &[
+pub(crate) static NO_ATOMIC_CAS: &[&str] = &[
     "avr-unknown-gnu-atmega328",
     "bpfeb-unknown-none",
     "bpfel-unknown-none",
@@ -19,7 +19,7 @@ static NO_ATOMIC_CAS: &[&str] = &[
 // Note: This is the list as of nightly-2022-02-10. We don't refer to this in
 // nightly-2022-02-11+ because feature(cfg_target_has_atomic) stabilized.
 #[rustfmt::skip]
-static NO_ATOMIC_64: &[&str] = &[
+pub(crate) static NO_ATOMIC_64: &[&str] = &[
     "arm-linux-androideabi",
     "armebv7r-none-eabi",
     "armebv7r-none-eabihf",
@@ -69,7 +69,7 @@ static NO_ATOMIC_64: &[&str] = &[
 ];
 
 #[rustfmt::skip]
-static NO_ATOMIC: &[&str] = &[
+pub(crate) static NO_ATOMIC: &[&str] = &[
     "bpfeb-unknown-none",
     "bpfel-unknown-none",
     "mipsel-sony-psx",

tools/ci/gen.sh

@@ -18,7 +18,7 @@ git config user.name 'Taiki Endo'
 git config user.email '[email protected]'
 
 has_update=''
-for path in no_atomic.rs src/gen/*; do
+for path in src/gen/*; do
     git add -N "${path}"
     if ! git diff --exit-code -- "${path}"; then
         git add "${path}"

tools/gen.sh

@@ -12,4 +12,6 @@ cd -- "$(dirname -- "$0")"/..
 
 set -x
 
+./tools/no_atomic.sh
+
 ./tools/target_spec.sh

tools/no_atomic.sh

@@ -10,6 +10,8 @@ cd -- "$(dirname -- "$0")"/..
 #
 # USAGE:
 #    ./tools/no_atomic.sh
+#
+# This script is intended to be called by gen.sh, but can be called separately.
 
 retry() {
     for i in {1..10}; do
@@ -26,7 +28,8 @@ bail() {
     exit 1
 }
 
-file=no_atomic.rs
+file=src/gen/build.rs
+mkdir -p -- "$(dirname -- "${file}")"
 
 # We don't refer to NO_ATOMIC_CAS and NO_ATOMIC_64 in nightly-2022-02-11+
 # because feature(cfg_target_has_atomic) stabilized. So, we get the list
@@ -77,19 +80,19 @@ cat >|"${file}" <<EOF
 // Note: This is the list as of nightly-2022-02-10. We don't refer to this in
 // nightly-2022-02-11+ because feature(cfg_target_has_atomic) stabilized.
 #[rustfmt::skip]
-static NO_ATOMIC_CAS: &[&str] = &[
+pub(crate) static NO_ATOMIC_CAS: &[&str] = &[
 ${no_atomic_cas[*]}
 ];
 
 // Note: This is the list as of nightly-2022-02-10. We don't refer to this in
 // nightly-2022-02-11+ because feature(cfg_target_has_atomic) stabilized.
 #[rustfmt::skip]
-static NO_ATOMIC_64: &[&str] = &[
+pub(crate) static NO_ATOMIC_64: &[&str] = &[
 ${no_atomic_64[*]}
 ];
 
 #[rustfmt::skip]
-static NO_ATOMIC: &[&str] = &[
+pub(crate) static NO_ATOMIC: &[&str] = &[
 ${no_atomic}
 ];
 EOF

tools/target_spec.sh

@@ -13,12 +13,12 @@ cd -- "$(dirname -- "$0")"/..
 #
 # This script is intended to be called by gen.sh, but can be called separately.
 
-utils_file=src/gen/utils.rs
-mkdir -p -- "$(dirname -- "${utils_file}")"
+file=src/gen/utils.rs
+mkdir -p -- "$(dirname -- "${file}")"
 
 known_64_bit_arch=($(rustc -Z unstable-options --print all-target-specs-json | jq -r '. | to_entries[].value | if ."target-pointer-width" == "64" then .arch else empty end' | LC_ALL=C sort -u))
 
-cat >|"${utils_file}" <<EOF
+cat >|"${file}" <<EOF
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 // This file is @generated by ${0##*/}.
 // It is not intended for manual editing.