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// Copyright 2012 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 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Runtime calls emitted by the compiler.
use c_str::ToCStr;
use cast::transmute;
use libc::{c_char, c_void, size_t, uintptr_t};
use option::{Option, None, Some};
use sys;
use rt::task::Task;
use rt::local::Local;
use rt::borrowck;
#[lang="fail_"]
pub fn fail_(expr: *c_char, file: *c_char, line: size_t) -> ! {
sys::begin_unwind_(expr, file, line);
}
#[lang="fail_bounds_check"]
pub fn fail_bounds_check(file: *c_char, line: size_t,
index: size_t, len: size_t) {
let msg = fmt!("index out of bounds: the len is %d but the index is %d",
len as int, index as int);
do msg.with_c_str |buf| {
fail_(buf, file, line);
}
}
#[lang="malloc"]
pub unsafe fn local_malloc(td: *c_char, size: uintptr_t) -> *c_char {
// XXX: Unsafe borrow for speed. Lame.
let task: Option<*mut Task> = Local::try_unsafe_borrow();
match task {
Some(task) => {
(*task).heap.alloc(td as *c_void, size as uint) as *c_char
}
None => rtabort!("local malloc outside of task")
}
}
// NB: Calls to free CANNOT be allowed to fail, as throwing an exception from
// inside a landing pad may corrupt the state of the exception handler. If a
// problem occurs, call exit instead.
#[lang="free"]
pub unsafe fn local_free(ptr: *c_char) {
::rt::local_heap::local_free(ptr);
}
#[lang="borrow_as_imm"]
#[inline]
pub unsafe fn borrow_as_imm(a: *u8, file: *c_char, line: size_t) -> uint {
borrowck::borrow_as_imm(a, file, line)
}
#[lang="borrow_as_mut"]
#[inline]
pub unsafe fn borrow_as_mut(a: *u8, file: *c_char, line: size_t) -> uint {
borrowck::borrow_as_mut(a, file, line)
}
#[lang="record_borrow"]
pub unsafe fn record_borrow(a: *u8, old_ref_count: uint,
file: *c_char, line: size_t) {
borrowck::record_borrow(a, old_ref_count, file, line)
}
#[lang="unrecord_borrow"]
pub unsafe fn unrecord_borrow(a: *u8, old_ref_count: uint,
file: *c_char, line: size_t) {
borrowck::unrecord_borrow(a, old_ref_count, file, line)
}
#[lang="return_to_mut"]
#[inline]
pub unsafe fn return_to_mut(a: *u8, orig_ref_count: uint,
file: *c_char, line: size_t) {
borrowck::return_to_mut(a, orig_ref_count, file, line)
}
#[lang="check_not_borrowed"]
#[inline]
pub unsafe fn check_not_borrowed(a: *u8,
file: *c_char,
line: size_t) {
borrowck::check_not_borrowed(a, file, line)
}
#[lang="start"]
pub fn start(main: *u8, argc: int, argv: **c_char) -> int {
use rt;
unsafe {
return do rt::start(argc, argv as **u8) {
let main: extern "Rust" fn() = transmute(main);
main();
};
}
}
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