mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-16 04:55:22 +03:00
Alex Crichton
5c3fe111d4
This commit removes usage of the `libc` crate in "portable" modules like those at the top level and `sys_common`. Instead common types like `*mut u8` or `u32` are used instead of `*mut c_void` or `c_int` as well as switching to platform-specific functions like `sys::strlen` instead of `libc::strlen`.
99 lines
3.1 KiB
Rust
99 lines
3.1 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use alloc::boxed::FnBox;
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use io;
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use ffi::CStr;
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use mem;
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use libc::c_void;
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use ptr;
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use sys::c;
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use sys::handle::Handle;
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use sys_common::thread::*;
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use time::Duration;
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use super::to_u16s;
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pub const DEFAULT_MIN_STACK_SIZE: usize = 2 * 1024 * 1024;
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pub struct Thread {
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handle: Handle
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}
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impl Thread {
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pub unsafe fn new<'a>(stack: usize, p: Box<FnBox() + 'a>)
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-> io::Result<Thread> {
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let p = box p;
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// FIXME On UNIX, we guard against stack sizes that are too small but
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// that's because pthreads enforces that stacks are at least
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// PTHREAD_STACK_MIN bytes big. Windows has no such lower limit, it's
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// just that below a certain threshold you can't do anything useful.
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// That threshold is application and architecture-specific, however.
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// Round up to the next 64 kB because that's what the NT kernel does,
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// might as well make it explicit.
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let stack_size = (stack + 0xfffe) & (!0xfffe);
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let ret = c::CreateThread(ptr::null_mut(), stack_size,
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thread_start, &*p as *const _ as *mut _,
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0, ptr::null_mut());
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return if ret as usize == 0 {
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Err(io::Error::last_os_error())
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} else {
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mem::forget(p); // ownership passed to CreateThread
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Ok(Thread { handle: Handle::new(ret) })
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};
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extern "system" fn thread_start(main: *mut c_void) -> c::DWORD {
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unsafe { start_thread(main as *mut u8); }
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0
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}
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}
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pub fn set_name(name: &CStr) {
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if let Ok(utf8) = name.to_str() {
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if let Ok(utf16) = to_u16s(utf8) {
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unsafe { c::SetThreadDescription(c::GetCurrentThread(), utf16.as_ptr()); };
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};
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};
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}
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pub fn join(self) {
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let rc = unsafe { c::WaitForSingleObject(self.handle.raw(), c::INFINITE) };
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if rc == c::WAIT_FAILED {
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panic!("failed to join on thread: {}",
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io::Error::last_os_error());
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}
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}
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pub fn yield_now() {
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// This function will return 0 if there are no other threads to execute,
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// but this also means that the yield was useless so this isn't really a
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// case that needs to be worried about.
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unsafe { c::SwitchToThread(); }
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}
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pub fn sleep(dur: Duration) {
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unsafe {
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c::Sleep(super::dur2timeout(dur))
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}
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}
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pub fn handle(&self) -> &Handle { &self.handle }
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pub fn into_handle(self) -> Handle { self.handle }
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}
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#[cfg_attr(test, allow(dead_code))]
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pub mod guard {
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pub unsafe fn current() -> Option<usize> { None }
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pub unsafe fn init() -> Option<usize> { None }
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}
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