57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
// Copyright 2013 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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//! Runtime environment settings
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use from_str::from_str;
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use option::{Some, None};
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use os;
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// Note that these are all accessed without any synchronization.
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// They are expected to be initialized once then left alone.
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static mut MIN_STACK: uint = 2 * 1024 * 1024;
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/// This default corresponds to 20M of cache per scheduler (at the default size).
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static mut MAX_CACHED_STACKS: uint = 10;
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static mut DEBUG_BORROW: bool = false;
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pub fn init() {
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unsafe {
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match os::getenv("RUST_MIN_STACK") {
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Some(s) => match from_str(s) {
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Some(i) => MIN_STACK = i,
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None => ()
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},
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None => ()
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}
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match os::getenv("RUST_MAX_CACHED_STACKS") {
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Some(max) => MAX_CACHED_STACKS = from_str(max).expect("expected positive integer in \
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RUST_MAX_CACHED_STACKS"),
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None => ()
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}
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match os::getenv("RUST_DEBUG_BORROW") {
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Some(_) => DEBUG_BORROW = true,
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None => ()
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}
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}
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}
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pub fn min_stack() -> uint {
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unsafe { MIN_STACK }
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}
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pub fn max_cached_stacks() -> uint {
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unsafe { MAX_CACHED_STACKS }
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}
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pub fn debug_borrow() -> bool {
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unsafe { DEBUG_BORROW }
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}
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