abi_stable 0.9.0

For doing Rust-to-Rust ffi,writing libraries loaded at program startup.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

//! Utilities for use while developing dynamic libraries.

use std::{
    path::{Path,PathBuf},
    io,
};

use crate::library::RootModule;

/// Returns the path in the target directory
/// to the last version of an implementation crate's dynamic library.
/// 
/// The path can be in either the "debug" or "release" subdirectories.
pub fn compute_library_path<M: RootModule>(target_path: &Path)->io::Result<PathBuf>{
    let debug_dir  =target_path.join("debug/"  );
    let release_dir=target_path.join("release/");

    let debug_path  =M::get_library_path(&debug_dir);
    let release_path=M::get_library_path(&release_dir);

    Ok(match (debug_path.exists(),release_path.exists()) {
        (false,false)=>debug_dir,
        (true,false)=>debug_dir,
        (false,true)=>release_dir,
        (true,true)=>{
            if debug_path.metadata()?.modified()? < release_path.metadata()?.modified()? {
                release_dir
            }else{
                debug_dir
            }
        }
    })
}