Modify the nodeIterator layout and update CI (#114)

Modify the `nodeIterator` layout to get a common size in 32bit
architectures, which fixes the alignment for 32bit (arm, ppc and mips).

- Add additional targets for cross-compilations to make sure future
  changes in opaque structures works.
- Move 32bit CI job and remove redundant job.

Signed-off-by: Björn Svensson <bjorn.a.svensson@est.tech>

.github/workflows/build.yml

@@ -1,4 +1,5 @@
-name: Build and test
+name: Other targets
+
 on: [push, pull_request]
 
 jobs:
@@ -77,3 +78,36 @@ jobs:
           run: |
             gmake
             mkdir build && cd build && cmake .. && gmake
+
+  build-cross:
+    name: Cross-compile ${{ matrix.config.target }}
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {target: arm,      host: arm-linux-gnueabi,       qemu: arm,      gccver: 12 }
+          - {target: armhf,    host: arm-linux-gnueabihf,     qemu: arm,      gccver: 12 }
+          - {target: aarch64,  host: aarch64-linux-gnu,       qemu: aarch64,  gccver: 12 }
+          - {target: riscv64,  host: riscv64-linux-gnu,       qemu: riscv64,  gccver: 12 }
+          - {target: ppc,      host: powerpc-linux-gnu,       qemu: ppc,      gccver: 12 }
+          - {target: ppc64,    host: powerpc64-linux-gnu,     qemu: ppc64,    gccver: 12 }
+          - {target: ppc64le,  host: powerpc64le-linux-gnu,   qemu: ppc64le,  gccver: 12 }
+          - {target: s390x,    host: s390x-linux-gnu,         qemu: s390x,    gccver: 12 }
+          - {target: mips,     host: mips-linux-gnu,          qemu: mips,     gccver: 10 }
+          - {target: mips64,   host: mips64-linux-gnuabi64,   qemu: mips64,   gccver: 10 }
+          - {target: mipsel,   host: mipsel-linux-gnu,        qemu: mipsel,   gccver: 10 }
+          - {target: mips64el, host: mips64el-linux-gnuabi64, qemu: mips64el, gccver: 10 }
+    steps:
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+      - name: Prepare
+        uses: awalsh128/cache-apt-pkgs-action@a6c3917cc929dd0345bfb2d3feaf9101823370ad # v1.4.2
+        with:
+          packages: gcc-${{ matrix.config.gccver }}-${{ matrix.config.host }}
+          version: ${{ matrix.config.target }}-1.0
+      - name: Build
+        env:
+          CC: ${{ matrix.config.host }}-gcc-${{ matrix.config.gccver }}
+          AR: ${{ matrix.config.host }}-ar
+        run: |
+          make

.github/workflows/ci.yml

@@ -117,6 +117,28 @@ jobs:
           TEST_PREFIX: valgrind --error-exitcode=99 --track-origins=yes --leak-check=full
         run: ./test.sh
 
+  ubuntu-32bit:
+    name: Build for 32-bit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+      - name: Prepare
+        uses: awalsh128/cache-apt-pkgs-action@a6c3917cc929dd0345bfb2d3feaf9101823370ad # v1.4.2
+        with:
+          packages: gcc-multilib
+          version: 1.0
+      - name: Install Valkey
+        run: |
+          git clone --depth 1 --branch 7.2.5 https://github.com/valkey-io/valkey.git
+          cd valkey && sudo BUILD_TLS=yes make install
+      - name: Build
+        run: |
+          make 32bit
+      - name: Run tests
+        working-directory: tests
+        run: |
+          ./test.sh
+
   install:
     name: Installation tests
     runs-on: ubuntu-latest

include/valkey/cluster.h

@@ -150,8 +150,6 @@ typedef struct valkeyClusterAsyncContext {
 
 #if UINTPTR_MAX == UINT64_MAX
 #define VALKEY_NODE_ITERATOR_SIZE 56
-#elif defined(__arm__)
-#define VALKEY_NODE_ITERATOR_SIZE 40
 #else
 #define VALKEY_NODE_ITERATOR_SIZE 32
 #endif

src/cluster.c

@@ -3542,8 +3542,8 @@ void valkeyClusterAsyncFree(valkeyClusterAsyncContext *acc) {
 }
 
 struct nodeIterator {
-    valkeyClusterContext *cc;
     uint64_t route_version;
+    valkeyClusterContext *cc;
     int retries_left;
     dictIterator di;
 };