mirror of
https://github.com/servo/servo.git
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bb0d08432e
* Migrate to 2024 edition Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> * Allow unsafe_op_in_unsafe_fn lint This lint warns by default in the 2024 edition, but is *way* too noisy for servo. We might enable it in the future, but not now. Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> * Compile using the 2024 edition Signed-off-by: Simon Wülker <simon.wuelker@arcor.de> --------- Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
81 lines
2.3 KiB
Rust
81 lines
2.3 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 https://mozilla.org/MPL/2.0/. */
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//! Selecting the default global allocator for Servo
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#[global_allocator]
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static ALLOC: Allocator = Allocator;
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pub use crate::platform::*;
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#[cfg(not(any(windows, feature = "use-system-allocator", target_env = "ohos")))]
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mod platform {
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use std::os::raw::c_void;
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pub use tikv_jemallocator::Jemalloc as Allocator;
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/// Get the size of a heap block.
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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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pub unsafe extern "C" fn usable_size(ptr: *const c_void) -> usize {
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unsafe { tikv_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 tikv_jemalloc_sys::{free, malloc, realloc};
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}
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}
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#[cfg(all(
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not(windows),
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any(feature = "use-system-allocator", target_env = "ohos")
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))]
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mod platform {
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pub use std::alloc::System 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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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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pub unsafe extern "C" fn usable_size(ptr: *const c_void) -> usize {
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#[cfg(target_vendor = "apple")]
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return libc::malloc_size(ptr);
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#[cfg(not(target_vendor = "apple"))]
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return libc::malloc_usable_size(ptr as *mut _);
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}
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pub mod libc_compat {
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pub use libc::{free, malloc, realloc};
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}
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}
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#[cfg(windows)]
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mod platform {
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pub use std::alloc::System as Allocator;
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use std::os::raw::c_void;
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use windows_sys::Win32::Foundation::FALSE;
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use windows_sys::Win32::System::Memory::{GetProcessHeap, HeapSize, HeapValidate};
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/// Get the size of a heap block.
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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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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) == FALSE {
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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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