rustfs-mimalloc-sys

Low-level FFI bindings to mimalloc V3 (v3.5.2).

For a safe, ergonomic wrapper, use rustfs-mimalloc.

Usage

[dependencies]
rustfs-mimalloc-sys = "0.5.4"

unsafe {
    let ptr = rustfs_mimalloc_sys::mi_malloc_aligned(64, 8);
    // ... use ptr ...
    rustfs_mimalloc_sys::mi_free(ptr);
}

Feature	Description
`secure`	Heap allocation encryption (MI_SECURE=4)
`debug`	mimalloc debug checks
`debug_in_debug`	Auto-enable `debug` in Cargo debug builds
`override`	Override system `malloc`/`free`
`local_dynamic_tls`	Use local-dynamic TLS model
`no_thp`	Disable Transparent Huge Pages

This crate vendors the mimalloc V3 C source and compiles it via the cc crate. No system mimalloc installation required.

Static linking — no runtime dependencies
Platform-specific flags handled automatically (Windows libs, musl compat, TLS model)
links = "mimalloc" — exports DEP_MIMALLOC_INCLUDE for downstream C/C++ crates
V3.5.2 small allocation/free APIs, including mi_wmalloc_small, mi_wzalloc_small, the thread-local heap word-size variants, mi_free_small_nonnull, and inline Rust mirrors for mi_malloc_csize, mi_zalloc_csize, mi_theap_malloc_csize, mi_theap_zalloc_csize, mi_free_csize, and mi_free_csize_nonnull
Raw experimental profiling FFI from mimalloc-profile.h

Rust 1.96.0. Rolling support window for the latest three stable Rust releases.

Apache-2.0. The vendored mimalloc C library is MIT-licensed.