forked from mirrors/gecko-dev
ac36ad85a7
Instead use C-level malloc()/free() so that the size doesn’t need to be known during deallocation, since FreeType doesn’t provide it. Hopefully fixes https://github.com/servo/servo/issues/19058 Depends on https://github.com/alexcrichton/jemallocator/pull/21 Source-Repo: https://github.com/servo/servo Source-Revision: f18099118a5be17b5b1d6fdcc3352a98a1499e6a --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 8087ee658a0ca822c6cdc85c00cfc8984b1fa668
71 lines
2.1 KiB
Rust
71 lines
2.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Selecting the default global allocator for Servo
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#![cfg_attr(all(feature = "unstable", windows), feature(alloc_system, allocator_api))]
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#![cfg_attr(feature = "unstable", feature(global_allocator))]
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#[cfg(feature = "unstable")]
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#[global_allocator]
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static ALLOC: Allocator = Allocator;
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pub use platform::*;
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#[cfg(all(feature = "unstable", not(windows)))]
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mod platform {
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extern crate jemallocator;
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pub use self::jemallocator::Jemalloc as Allocator;
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use std::os::raw::c_void;
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/// Get the size of a heap block.
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pub unsafe extern "C" fn usable_size(ptr: *const c_void) -> usize {
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jemallocator::usable_size(ptr)
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}
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/// Memory allocation APIs compatible with libc
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pub mod libc_compat {
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pub use super::jemallocator::ffi::{malloc, realloc, free};
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}
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}
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#[cfg(all(feature = "unstable", windows))]
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mod platform {
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extern crate alloc_system;
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extern crate kernel32;
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pub use self::alloc_system::System as Allocator;
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use self::kernel32::{GetProcessHeap, HeapSize, HeapValidate};
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use std::os::raw::c_void;
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/// Get the size of a heap block.
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pub unsafe extern "C" fn usable_size(mut ptr: *const c_void) -> usize {
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let heap = GetProcessHeap();
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if HeapValidate(heap, 0, ptr) == 0 {
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ptr = *(ptr as *const *const c_void).offset(-1);
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}
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HeapSize(heap, 0, ptr) as usize
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}
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}
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#[cfg(not(feature = "unstable"))]
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mod platform {
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use std::os::raw::c_void;
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/// Without `#[global_allocator]` we cannot be certain of what allocator is used
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/// or how it is linked. We therefore disable memory reporting. (Return zero.)
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pub unsafe extern "C" fn usable_size(_ptr: *const c_void) -> usize {
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0
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}
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/// Memory allocation APIs compatible with libc
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pub mod libc_compat {
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extern crate libc;
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pub use self::libc::{malloc, realloc, free};
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}
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}
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