77 lines
2.0 KiB
Rust
77 lines
2.0 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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use container::Container;
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use ptr::Ptr;
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use vec;
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use ops::Drop;
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use libc::{c_uint, uintptr_t};
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pub struct StackSegment {
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buf: ~[u8],
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valgrind_id: c_uint
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}
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pub impl StackSegment {
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fn new(size: uint) -> StackSegment {
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unsafe {
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// Crate a block of uninitialized values
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let mut stack = vec::with_capacity(size);
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vec::raw::set_len(&mut stack, size);
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let mut stk = StackSegment {
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buf: stack,
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valgrind_id: 0
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};
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// XXX: Using the FFI to call a C macro. Slow
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stk.valgrind_id = rust_valgrind_stack_register(stk.start(), stk.end());
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return stk;
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}
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}
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/// Point to the low end of the allocated stack
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fn start(&self) -> *uint {
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vec::raw::to_ptr(self.buf) as *uint
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}
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/// Point one word beyond the high end of the allocated stack
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fn end(&self) -> *uint {
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vec::raw::to_ptr(self.buf).offset(self.buf.len()) as *uint
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}
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}
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impl Drop for StackSegment {
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fn finalize(&self) {
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unsafe {
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// XXX: Using the FFI to call a C macro. Slow
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rust_valgrind_stack_deregister(self.valgrind_id);
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}
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}
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}
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pub struct StackPool(());
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impl StackPool {
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pub fn new() -> StackPool { StackPool(()) }
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fn take_segment(&self, min_size: uint) -> StackSegment {
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StackSegment::new(min_size)
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}
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fn give_segment(&self, _stack: StackSegment) {
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}
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}
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extern {
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fn rust_valgrind_stack_register(start: *uintptr_t, end: *uintptr_t) -> c_uint;
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fn rust_valgrind_stack_deregister(id: c_uint);
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}
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