rust bindings: start

rust
Avril 3 years ago
parent 7e4e3f9867
commit 7b623e0fdf
Signed by: flanchan
GPG Key ID: 284488987C31F630

2
.gitignore vendored

@ -4,3 +4,5 @@ cow-*
obj/ obj/
*~ *~
vgcore.* vgcore.*
target/
!cowslice/*.a

34
cowslice/Cargo.lock generated

@ -0,0 +1,34 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "cowslice"
version = "0.1.0"
dependencies = [
"rustc_version",
]
[[package]]
name = "rustc_version"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
dependencies = [
"semver",
]
[[package]]
name = "semver"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
dependencies = [
"semver-parser",
]
[[package]]
name = "semver-parser"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"

@ -0,0 +1,11 @@
[package]
name = "cowslice"
version = "0.1.0"
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
[build-dependencies]
rustc_version = "0.2"

@ -0,0 +1,27 @@
extern crate rustc_version;
use rustc_version::{version, version_meta, Channel};
fn main() {
// Assert we haven't travelled back in time
assert!(version().unwrap().major >= 1);
// Set cfg flags depending on release channel
match version_meta().unwrap().channel {
Channel::Stable => {
println!("cargo:rustc-cfg=stable");
}
Channel::Beta => {
println!("cargo:rustc-cfg=beta");
}
Channel::Nightly => {
println!("cargo:rustc-cfg=nightly");
}
Channel::Dev => {
println!("cargo:rustc-cfg=dev");
}
}
// Link to `libcow.a`
println!(r"cargo:rustc-link-search=./lib");
println!(r"cargo:rustc-link-lib=cow");
}

@ -0,0 +1,29 @@
//! Interfaces with the C library
use core::ffi::c_void;
/// Raw `cow_t*`
///
/// This is, essentially, a pointer to the origin (`void*`) pointer.
/// So is represented as `*mut RawHandle == void**`.
pub type RawHandle = *mut c_void;
extern "C" {
pub fn cow_create(sz: usize) -> *mut RawHandle;
pub fn cow_free(cow: *mut RawHandle);
pub fn cow_clone(cow: *const RawHandle) -> *mut RawHandle;
pub fn cow_is_fake(cow: *const RawHandle) -> i32;
pub fn cow_size(cow: *const RawHandle) -> usize;
pub fn cow_err() -> i32;
pub fn cow_err_msg(kind: i32) -> *const *const u8;
}
#[inline(always)] pub unsafe fn cow_area_mut(cow: *mut RawHandle) -> *mut c_void
{
*cow
}
#[inline(always)] pub unsafe fn cow_area(cow: *const RawHandle) -> *const c_void
{
(*cow) as *const _
}

@ -0,0 +1,25 @@
#![allow(dead_code)]
mod ffi;
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
assert_eq!(2 + 2, 4);
}
#[test]
fn link_works() {
unsafe {
let raw_h = super::ffi::cow_create(100);
assert_ne!(raw_h as usize, 0);
println!("Raw handle pointer is {:p}", raw_h);
super::ffi::cow_free(raw_h);
}
unsafe {
assert_eq!(super::ffi::cow_err(), 1, "There was an error in `cow_free`");
}
}
}
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