Introduce feature flag to switch between mimalloc major versions

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
         run: cargo test --features secure
 
       - name: Test libmimalloc-sys crate bindings (secure)
-        run: cargo run --features secure -p libmimalloc-sys-test
+        run: cargo run --features libmimalloc-sys-test/secure -p libmimalloc-sys-test
 
       - name: Build (no secure)
         run: cargo build
@@ -58,7 +58,34 @@ jobs:
         run: cargo test --features extended
 
       - name: Test libmimalloc-sys crate bindings (extended)
-        run: cargo run --features extended -p libmimalloc-sys-test
+        run: cargo run --features libmimalloc-sys-test/extended -p libmimalloc-sys-test
+
+      - name: Build (v3, secure)
+        run: cargo build --features v3,secure
+
+      - name: Test (v3, secure)
+        run: cargo test --features v3,secure
+
+      - name: Test libmimalloc-sys crate bindings (v3, secure)
+        run: cargo run --features libmimalloc-sys-test/v3,libmimalloc-sys-test/secure -p libmimalloc-sys-test
+
+      - name: Build (v3, no secure)
+        run: cargo build --features v3
+
+      - name: Test (v3, no secure)
+        run: cargo test --features v3
+
+      - name: Test libmimalloc-sys crate bindings (v3, no secure)
+        run: cargo run --features libmimalloc-sys-test/v3 -p libmimalloc-sys-test
+
+      - name: Build (v3, extended)
+        run: cargo build --features v3,extended
+
+      - name: Test (v3, extended)
+        run: cargo test --features v3,extended
+
+      - name: Test libmimalloc-sys crate bindings (v3, extended)
+        run: cargo run --features libmimalloc-sys-test/v3,libmimalloc-sys-test/extended -p libmimalloc-sys-test
 
   lint:
     name: Rustfmt / Clippy

.gitmodules

@@ -1,3 +1,6 @@
-[submodule "libmimalloc-sys/c_src/mimalloc"]
-	path = libmimalloc-sys/c_src/mimalloc
+[submodule "libmimalloc-sys/c_src/mimalloc/v2"]
+	path = libmimalloc-sys/c_src/mimalloc/v2
+	url = https://github.com/microsoft/mimalloc
+[submodule "libmimalloc-sys/c_src/mimalloc/v3"]
+	path = libmimalloc-sys/c_src/mimalloc/v3
 	url = https://github.com/microsoft/mimalloc

Cargo.toml

@@ -32,3 +32,4 @@ debug_in_debug = ["libmimalloc-sys/debug_in_debug"]
 local_dynamic_tls = ["libmimalloc-sys/local_dynamic_tls"]
 no_thp = ["libmimalloc-sys/no_thp"]
 extended = ["libmimalloc-sys/extended"]
+v3 = ["libmimalloc-sys/v3"]

libmimalloc-sys/Cargo.toml

@@ -10,12 +10,18 @@ description = "Sys crate wrapping the mimalloc allocator"
 license = "MIT"
 links = "mimalloc"
 exclude = [
-    "/c_src/mimalloc/bin",
-    "/c_src/mimalloc/cmake",
-    "/c_src/mimalloc/doc",
-    "/c_src/mimalloc/docs",
-    "/c_src/mimalloc/ide",
-    "/c_src/mimalloc/test",
+    "/c_src/mimalloc/v2/bin",
+    "/c_src/mimalloc/v2/cmake",
+    "/c_src/mimalloc/v2/doc",
+    "/c_src/mimalloc/v2/docs",
+    "/c_src/mimalloc/v2/ide",
+    "/c_src/mimalloc/v2/test",
+    "/c_src/mimalloc/v3/bin",
+    "/c_src/mimalloc/v3/cmake",
+    "/c_src/mimalloc/v3/doc",
+    "/c_src/mimalloc/v3/docs",
+    "/c_src/mimalloc/v3/ide",
+    "/c_src/mimalloc/v3/test",
 ]
 
 [dependencies]
@@ -34,6 +40,7 @@ extended = ["cty"]
 arena = []
 local_dynamic_tls = []
 no_thp = []
+v3 = []
 
 # Show `extended` on docs.rs since it's the full API surface.
 [package.metadata.docs.rs]

libmimalloc-sys/build.rs

@@ -3,9 +3,15 @@ use std::env;
 fn main() {
     let mut build = cc::Build::new();
 
-    build.include("c_src/mimalloc/include");
-    build.include("c_src/mimalloc/src");
-    build.file("c_src/mimalloc/src/static.c");
+    let version = if env::var("CARGO_FEATURE_V3").is_ok() {
+        "v3"
+    } else {
+        "v2"
+    };
+
+    build.include(format!("c_src/mimalloc/{version}/include"));
+    build.include(format!("c_src/mimalloc/{version}/src"));
+    build.file(format!("c_src/mimalloc/{version}/src/static.c"));
 
     let target_os = env::var("CARGO_CFG_TARGET_OS").expect("target_os not defined!");
     let target_family = env::var("CARGO_CFG_TARGET_FAMILY").expect("target_family not defined!");

libmimalloc-sys/src/extended.rs

@@ -542,11 +542,15 @@ pub const mi_option_max_errors: mi_option_t = 19;
 /// Option (experimental)
 pub const mi_option_max_warnings: mi_option_t = 20;
 
+#[cfg(not(feature = "v3"))]
 /// Option (experimental)
 pub const mi_option_max_segment_reclaim: mi_option_t = 21;
 
 /// Last option.
+#[cfg(not(feature = "v3"))]
 pub const _mi_option_last: mi_option_t = 37;
+#[cfg(feature = "v3")]
+pub const _mi_option_last: mi_option_t = 43;
 
 extern "C" {
     // Note: mi_option_{enable,disable} aren't exposed because they're redundant

libmimalloc-sys/sys-test/Cargo.toml

@@ -8,8 +8,13 @@ license = "MIT"
 publish = false
 
 [dependencies]
-libmimalloc-sys = { path = "..", features = ["extended"] }
+libmimalloc-sys = { path = ".." }
 libc = "0.2"
 
 [build-dependencies]
 ctest2 = "0.4"
+
+[features]
+secure = ["libmimalloc-sys/secure"]
+extended = ["libmimalloc-sys/extended"]
+v3 = ["libmimalloc-sys/v3"]

libmimalloc-sys/sys-test/build.rs

@@ -1,11 +1,31 @@
+use std::env;
+
 fn main() {
+    let cargo_manifest_dir = env!("CARGO_MANIFEST_DIR");
+    let secure = if env::var("CARGO_FEATURE_SECURE").is_ok() {
+        Some("secure")
+    } else {
+        None
+    };
+    let extended = if env::var("CARGO_FEATURE_EXTENDED").is_ok() {
+        Some("extended")
+    } else {
+        None
+    };
+    let version = if env::var("CARGO_FEATURE_V3").is_ok() {
+        "v3"
+    } else {
+        "v2"
+    };
+
     let mut cfg = ctest2::TestGenerator::new();
     cfg.header("mimalloc.h")
-        .include(concat!(
-            env!("CARGO_MANIFEST_DIR"),
-            "/../c_src/mimalloc/include"
+        .include(format!(
+            "{cargo_manifest_dir}/../c_src/mimalloc/{version}/include"
         ))
-        .cfg("feature", Some("extended"))
+        .cfg("feature", secure)
+        .cfg("feature", extended)
+        .cfg("feature", (version == "v3").then_some("v3"))
         .fn_cname(|rust, link_name| link_name.unwrap_or(rust).to_string())
         // ignore whether or not the option enum is signed.
         .skip_signededness(|c| c.ends_with("_t") || c.ends_with("_e"))

libmimalloc-sys/sys-test/src/main.rs

@@ -1,4 +1,4 @@
-#![allow(bad_style, clippy::all)]
+#![allow(bad_style, unused_imports, unused_macros, clippy::all)]
 
 use libmimalloc_sys::*;