shared_library-0.1.9/.gitignore 0100644 0003720 0003720 00000000022 13321102072 0014703 0 ustar 00 0000000 0000000 target
Cargo.lock
shared_library-0.1.9/.travis.yml 0100644 0003720 0003720 00000001100 13321102072 0015022 0 ustar 00 0000000 0000000 language: rust
after_success:
- |
[ $TRAVIS_BRANCH = master ] &&
[ $TRAVIS_PULL_REQUEST = false ] &&
cargo publish --token ${CRATESIO_TOKEN}
- |
[ $TRAVIS_BRANCH = master ] &&
[ $TRAVIS_PULL_REQUEST = false ] &&
cargo doc &&
echo '' > target/doc/index.html &&
git clone https://github.com/davisp/ghp-import &&
./ghp-import/ghp-import -n target/doc &&
git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
shared_library-0.1.9/Cargo.toml.orig 0100644 0003720 0003720 00000000454 13321102072 0015613 0 ustar 00 0000000 0000000 [package]
name = "shared_library"
version = "0.1.9"
authors = ["Pierre Krieger "]
description = "Easily bind to and load shared libraries"
license = "Apache-2.0/MIT"
repository = "https://github.com/tomaka/shared_library/"
[dependencies]
libc = "0.2"
lazy_static = "1"
shared_library-0.1.9/Cargo.toml 0000644 00000001527 00000000000 0012077 0 ustar 00 # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g. crates.io) dependencies
#
# If you believe there's an error in this file please file an
# issue against the rust-lang/cargo repository. If you're
# editing this file be aware that the upstream Cargo.toml
# will likely look very different (and much more reasonable)
[package]
name = "shared_library"
version = "0.1.9"
authors = ["Pierre Krieger "]
description = "Easily bind to and load shared libraries"
license = "Apache-2.0/MIT"
repository = "https://github.com/tomaka/shared_library/"
[dependencies.lazy_static]
version = "1"
[dependencies.libc]
version = "0.2"
shared_library-0.1.9/LICENSE-APACHE 0100644 0003720 0003720 00000025141 13321102072 0014650 0 ustar 00 0000000 0000000 Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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limitations under the License. shared_library-0.1.9/LICENSE-MIT 0100644 0003720 0003720 00000002041 13321102072 0014352 0 ustar 00 0000000 0000000 Copyright (c) 2017 Pierre Krieger
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DEALINGS IN THE SOFTWARE. shared_library-0.1.9/src/dynamic_library.rs 0100644 0003720 0003720 00000032104 13321102072 0017226 0 ustar 00 0000000 0000000 // Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 or the MIT license
// , at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Dynamic library facilities.
//!
//! A simple wrapper over the platform's dynamic library facilities
#![allow(missing_docs)]
use std::env;
use std::ffi::{CString, OsString};
use std::mem;
use std::path::{Path, PathBuf};
use libc;
pub struct DynamicLibrary {
handle: *mut u8
}
unsafe impl Send for DynamicLibrary {}
unsafe impl Sync for DynamicLibrary {}
impl Drop for DynamicLibrary {
fn drop(&mut self) {
if let Err(str) = dl::check_for_errors_in(|| unsafe {
dl::close(self.handle)
}) {
panic!("{}", str)
}
}
}
/// Special handles to be used with the `symbol_special` function. These are
/// provided by a GNU only extension and are not included as part of the POSIX
/// standard.
///
/// See https://linux.die.net/man/3/dlsym for their behaviour.
#[cfg(target_os = "linux")]
pub enum SpecialHandles {
Next,
Default,
}
impl DynamicLibrary {
// FIXME (#12938): Until DST lands, we cannot decompose &str into
// & and str, so we cannot usefully take ToCStr arguments by
// reference (without forcing an additional & around &str). So we
// are instead temporarily adding an instance for &Path, so that
// we can take ToCStr as owned. When DST lands, the &Path instance
// should be removed, and arguments bound by ToCStr should be
// passed by reference. (Here: in the `open` method.)
/// Lazily loads the dynamic library named `filename` into memory and
/// then returns an opaque "handle" for that dynamic library.
///
/// Returns a handle to the calling process when passed `None`.
pub fn open(filename: Option<&Path>) -> Result {
// The dynamic library must not be constructed if there is
// an error opening the library so the destructor does not
// run.
dl::open(filename.map(|path| path.as_os_str()))
.map(|handle| DynamicLibrary { handle })
}
/// Prepends a path to this process's search path for dynamic libraries
pub fn prepend_search_path(path: &Path) {
let mut search_path = Self::search_path();
search_path.insert(0, path.to_path_buf());
env::set_var(Self::envvar(), &Self::create_path(&search_path));
}
/// From a slice of paths, create a new vector which is suitable to be an
/// environment variable for this platforms dylib search path.
pub fn create_path(path: &[PathBuf]) -> OsString {
let mut newvar = OsString::new();
for (i, path) in path.iter().enumerate() {
if i > 0 { newvar.push(Self::separator()); }
newvar.push(path);
}
newvar
}
/// Returns the environment variable for this process's dynamic library
/// search path
pub fn envvar() -> &'static str {
if cfg!(windows) {
"PATH"
} else if cfg!(target_os = "macos") {
"DYLD_LIBRARY_PATH"
} else {
"LD_LIBRARY_PATH"
}
}
//TODO: turn this and `envvar` into associated constants
fn separator() -> &'static str {
if cfg!(windows) { ";" } else { ":" }
}
/// Returns the current search path for dynamic libraries being used by this
/// process
pub fn search_path() -> Vec {
match env::var_os(Self::envvar()) {
Some(var) => env::split_paths(&var).collect(),
None => Vec::new(),
}
}
/// Returns the address of where symbol `symbol` was loaded into memory.
///
/// In POSIX compliant systems, we return 'Err' if the symbol was not found,
/// in this library or any of the libraries that were automatically loaded
/// when this library was loaded.
pub unsafe fn symbol(&self, symbol: &str) -> Result<*mut T, String> {
// This function should have a lifetime constraint of 'a on
// T but that feature is still unimplemented
let raw_string = CString::new(symbol).unwrap();
// The value must not be constructed if there is an error so
// the destructor does not run.
dl::check_for_errors_in(|| {
dl::symbol(self.handle as *mut libc::c_void, raw_string.as_ptr() as *const _)
})
.map(|sym| mem::transmute(sym))
}
/// Returns the address of the first occurance of symbol `symbol` using the
/// default library search order if you use `SpecialHandles::Default`.
///
/// Returns the address of the next occurance of symbol `symbol` after the
/// current library in the default library search order if you use
/// `SpecialHandles::Next`.
#[cfg(target_os = "linux")]
pub unsafe fn symbol_special(handle: SpecialHandles, symbol: &str) -> Result<*mut T, String> {
// This function should have a lifetime constraint of 'a on
// T but that feature is still unimplemented
let handle = match handle {
SpecialHandles::Next => mem::transmute::(-1),
SpecialHandles::Default => ::std::ptr::null_mut(),
};
let raw_string = CString::new(symbol).unwrap();
// The value must not be constructed if there is an error so
// the destructor does not run.
dl::check_for_errors_in(|| {
dl::symbol(handle, raw_string.as_ptr() as *const _)
})
.map(|sym| mem::transmute(sym))
}
}
#[cfg(all(test, not(target_os = "ios")))]
mod test {
use super::*;
use std::mem;
use std::path::Path;
#[test]
#[cfg_attr(any(windows, target_os = "android"), ignore)] // FIXME #8818, #10379
fn test_loading_cosine() {
// The math library does not need to be loaded since it is already
// statically linked in
let libm = match DynamicLibrary::open(None) {
Err(error) => panic!("Could not load self as module: {}", error),
Ok(libm) => libm
};
let cosine: extern fn(libc::c_double) -> libc::c_double = unsafe {
match libm.symbol("cos") {
Err(error) => panic!("Could not load function cos: {}", error),
Ok(cosine) => mem::transmute::<*mut u8, _>(cosine)
}
};
let argument = 0.0;
let expected_result = 1.0;
let result = cosine(argument);
if result != expected_result {
panic!("cos({}) != {} but equaled {} instead", argument,
expected_result, result)
}
}
#[test]
#[cfg(any(target_os = "linux",
target_os = "macos",
target_os = "freebsd",
target_os = "fuchsia",
target_os = "netbsd",
target_os = "dragonfly",
target_os = "bitrig",
target_os = "openbsd",
target_os = "solaris"))]
fn test_errors_do_not_crash() {
// Open /dev/null as a library to get an error, and make sure
// that only causes an error, and not a crash.
let path = Path::new("/dev/null");
match DynamicLibrary::open(Some(&path)) {
Err(_) => {}
Ok(_) => panic!("Successfully opened the empty library.")
}
}
}
//TODO: use `unix` shortcut?
#[cfg(any(target_os = "linux",
target_os = "android",
target_os = "macos",
target_os = "ios",
target_os = "fuchsia",
target_os = "freebsd",
target_os = "netbsd",
target_os = "dragonfly",
target_os = "bitrig",
target_os = "openbsd",
target_os = "solaris",
target_os = "emscripten"))]
mod dl {
use std::ffi::{CString, CStr, OsStr};
use std::os::unix::ffi::OsStrExt;
use std::str;
use libc;
use std::ptr;
use std::sync::Mutex;
lazy_static! {
static ref LOCK: Mutex<()> = Mutex::new(());
}
pub fn open(filename: Option<&OsStr>) -> Result<*mut u8, String> {
check_for_errors_in(|| unsafe {
match filename {
Some(filename) => open_external(filename),
None => open_internal(),
}
})
}
const LAZY: libc::c_int = 1;
unsafe fn open_external(filename: &OsStr) -> *mut u8 {
let s = CString::new(filename.as_bytes().to_vec()).unwrap();
dlopen(s.as_ptr() as *const _, LAZY) as *mut u8
}
unsafe fn open_internal() -> *mut u8 {
dlopen(ptr::null(), LAZY) as *mut u8
}
pub fn check_for_errors_in(f: F) -> Result where
F: FnOnce() -> T,
{
unsafe {
// dlerror isn't thread safe, so we need to lock around this entire
// sequence
let _guard = LOCK.lock();
let _old_error = dlerror();
let result = f();
let last_error = dlerror() as *const _;
let ret = if ptr::null() == last_error {
Ok(result)
} else {
let s = CStr::from_ptr(last_error).to_bytes();
Err(str::from_utf8(s).unwrap().to_string())
};
ret
}
}
pub unsafe fn symbol(
handle: *mut libc::c_void,
symbol: *const libc::c_char,
) -> *mut u8 {
dlsym(handle, symbol) as *mut u8
}
pub unsafe fn close(handle: *mut u8) {
dlclose(handle as *mut libc::c_void); ()
}
extern {
fn dlopen(
filename: *const libc::c_char,
flag: libc::c_int,
) -> *mut libc::c_void;
fn dlerror() -> *mut libc::c_char;
fn dlsym(
handle: *mut libc::c_void,
symbol: *const libc::c_char,
) -> *mut libc::c_void;
fn dlclose(
handle: *mut libc::c_void,
) -> libc::c_int;
}
}
#[cfg(target_os = "windows")]
mod dl {
use std::ffi::OsStr;
use std::iter::Iterator;
use libc;
use std::ops::FnOnce;
use std::io::Error as IoError;
use std::os::windows::prelude::*;
use std::option::Option::{self, Some, None};
use std::ptr;
use std::result::Result;
use std::result::Result::{Ok, Err};
use std::string::String;
use std::vec::Vec;
pub fn open(filename: Option<&OsStr>) -> Result<*mut u8, String> {
// disable "dll load failed" error dialog.
let prev_error_mode = unsafe {
// SEM_FAILCRITICALERRORS 0x01
let new_error_mode = 1;
SetErrorMode(new_error_mode)
};
unsafe {
SetLastError(0);
}
let result = match filename {
Some(filename) => {
let filename_str: Vec<_> =
filename.encode_wide().chain(Some(0).into_iter()).collect();
let result = unsafe {
LoadLibraryW(filename_str.as_ptr() as *const libc::c_void)
};
// beware: Vec/String may change errno during drop!
// so we get error here.
if result == ptr::null_mut() {
Err(format!("{}", IoError::last_os_error()))
} else {
Ok(result as *mut u8)
}
}
None => {
let mut handle = ptr::null_mut();
let succeeded = unsafe {
GetModuleHandleExW(0, ptr::null(), &mut handle)
};
if succeeded == 0 {
Err(format!("{}", IoError::last_os_error()))
} else {
Ok(handle as *mut u8)
}
}
};
unsafe {
SetErrorMode(prev_error_mode);
}
result
}
pub fn check_for_errors_in(f: F) -> Result where
F: FnOnce() -> T,
{
unsafe {
SetLastError(0);
let result = f();
let error = IoError::last_os_error();
if 0 == error.raw_os_error().unwrap() {
Ok(result)
} else {
Err(format!("{}", error))
}
}
}
pub unsafe fn symbol(handle: *mut libc::c_void, symbol: *const libc::c_char) -> *mut u8 {
GetProcAddress(handle, symbol) as *mut u8
}
pub unsafe fn close(handle: *mut u8) {
FreeLibrary(handle as *mut libc::c_void); ()
}
#[allow(non_snake_case)]
extern "system" {
fn SetLastError(error: libc::size_t);
fn LoadLibraryW(name: *const libc::c_void) -> *mut libc::c_void;
fn GetModuleHandleExW(
dwFlags: u32,
name: *const u16,
handle: *mut *mut libc::c_void,
) -> i32;
fn GetProcAddress(
handle: *mut libc::c_void,
name: *const libc::c_char,
) -> *mut libc::c_void;
fn FreeLibrary(handle: *mut libc::c_void);
fn SetErrorMode(uMode: libc::c_uint) -> libc::c_uint;
}
}
shared_library-0.1.9/src/lib.rs 0100644 0003720 0003720 00000013615 13321102072 0014632 0 ustar 00 0000000 0000000 extern crate libc;
#[macro_use]
extern crate lazy_static;
pub mod dynamic_library;
/// Error that can happen while loading the shared library.
#[derive(Debug, Clone)]
pub enum LoadingError {
///
LibraryNotFound {
descr: String,
},
/// One of the symbols could not be found in the library.
SymbolNotFound {
/// The symbol.
symbol: &'static str,
}
}
#[macro_export]
macro_rules! shared_library {
($struct_name:ident, pub $($rest:tt)+) => {
shared_library!(__impl $struct_name [] [] [] pub $($rest)+);
};
($struct_name:ident, fn $($rest:tt)+) => {
shared_library!(__impl $struct_name [] [] [] fn $($rest)+);
};
($struct_name:ident, static $($rest:tt)+) => {
shared_library!(__impl $struct_name [] [] [] static $($rest)+);
};
($struct_name:ident, $def_path:expr, $($rest:tt)+) => {
shared_library!(__impl $struct_name [] [$def_path] [] $($rest)+);
};
(__impl $struct_name:ident
[$($p1:tt)*] [$($p2:tt)*] [$($p3:tt)*]
, $($rest:tt)*
) => {
shared_library!(__impl $struct_name [$($p1)*] [$($p2)*] [$($p3)*] $($rest)*);
};
(__impl $struct_name:ident
[$($p1:tt)*] [$($p2:tt)*] [$($p3:tt)*]
pub $($rest:tt)*
) => {
shared_library!(__impl $struct_name
[$($p1)*] [$($p2)*] [$($p3)* pub] $($rest)*);
};
(__impl $struct_name:ident
[$($p1:tt)*] [$($p2:tt)*] [$($p3:tt)*]
fn $name:ident($($p:ident:$ty:ty),*) -> $ret:ty, $($rest:tt)*
) => {
shared_library!(__impl $struct_name
[$($p1)*, $name:unsafe extern fn($($p:$ty),*) -> $ret]
[$($p2)*]
[$($p3)*
unsafe fn $name($($p:$ty),*) -> $ret {
#![allow(dead_code)]
($struct_name::get_static_ref().$name)($($p),*)
}
] $($rest)*);
};
(__impl $struct_name:ident
[$($p1:tt)*] [$($p2:tt)*] [$($p3:tt)*]
static $name:ident:$ty:ty, $($rest:tt)*
) => {
shared_library!(__impl $struct_name
[$($p1)*, $name: $ty]
[$($p2)*]
[$($p3)*] $($rest)*);
};
(__impl $struct_name:ident
[$($p1:tt)*] [$($p2:tt)*] [$($p3:tt)*]
fn $name:ident($($p:ident:$ty:ty),*), $($rest:tt)*
) => {
shared_library!(__impl $struct_name
[$($p1)*] [$($p2)*] [$($p3)*]
fn $name($($p:$ty),*) -> (), $($rest)*);
};
(__impl $struct_name:ident [$(,$mem_n:ident:$mem_t:ty)+] [$($p2:tt)*] [$($p3:tt)*]) => {
/// Symbols loaded from a shared library.
#[allow(non_snake_case)]
pub struct $struct_name {
_library_guard: $crate::dynamic_library::DynamicLibrary,
$(
pub $mem_n: $mem_t,
)+
}
impl $struct_name {
/// Tries to open the dynamic library.
#[allow(non_snake_case)]
pub fn open(path: &::std::path::Path) -> Result<$struct_name, $crate::LoadingError> {
use std::mem;
let dylib = match $crate::dynamic_library::DynamicLibrary::open(Some(path)) {
Ok(l) => l,
Err(reason) => return Err($crate::LoadingError::LibraryNotFound { descr: reason })
};
$(
let $mem_n: *mut () = match unsafe { dylib.symbol(stringify!($mem_n)) } {
Ok(s) => s,
Err(_) => return Err($crate::LoadingError::SymbolNotFound { symbol: stringify!($mem_n) }),
};
)+
Ok($struct_name {
_library_guard: dylib,
$(
$mem_n: unsafe { mem::transmute($mem_n) },
)+
})
}
}
shared_library!(__write_static_fns $struct_name [] [$($p2)*] [$($p3)*]);
};
(__write_static_fns $struct_name:ident [$($p1:tt)*] [] [$($p3:tt)*]) => {
};
(__write_static_fns $struct_name:ident [$($p1:tt)*] [$defpath:expr] [$($standalones:item)+]) => {
impl $struct_name {
/// This function is used by the regular functions.
fn get_static_ref() -> &'static $struct_name {
$struct_name::try_loading().ok()
.expect(concat!("Could not open dynamic \
library `", stringify!($struct_name),
"`"))
}
/// Try loading the static symbols linked to this library.
pub fn try_loading() -> Result<&'static $struct_name, $crate::LoadingError> {
use std::sync::{Mutex, Once, ONCE_INIT};
use std::mem;
unsafe {
static mut DATA: *const Mutex