Peter Limkilde Svendsen
56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
use core::ptr;
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use crate::{
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error::ResultExtPtrMut,
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header::errno::ENOMEM,
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platform::{self, types::*, Pal, Sys},
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};
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static mut BRK: *mut c_void = ptr::null_mut();
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/// See <https://pubs.opengroup.org/onlinepubs/7908799/xsh/brk.html>.
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///
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/// # Deprecation
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/// The `brk()` function was marked legacy in the System Interface & Headers
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/// Issue 5, and removed in Issue 6.
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#[deprecated]
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#[no_mangle]
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pub unsafe extern "C" fn brk(addr: *mut c_void) -> c_int {
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BRK = Sys::brk(addr).or_errno_null_mut();
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if BRK < addr {
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platform::ERRNO.set(ENOMEM);
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return -1;
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}
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0
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}
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/// See <https://pubs.opengroup.org/onlinepubs/7908799/xsh/brk.html>.
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///
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/// # Deprecation
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/// The `sbrk()` function was marked legacy in the System Interface & Headers
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/// Issue 5, and removed in Issue 6.
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#[deprecated]
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#[no_mangle]
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pub unsafe extern "C" fn sbrk(incr: intptr_t) -> *mut c_void {
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if BRK.is_null() {
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BRK = Sys::brk(ptr::null_mut()).or_errno_null_mut();
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}
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let old_brk = BRK;
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if incr != 0 {
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let addr = old_brk.offset(incr);
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BRK = Sys::brk(addr).or_errno_null_mut();
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if BRK < addr {
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platform::ERRNO.set(ENOMEM);
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return -1isize as *mut c_void;
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}
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}
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old_brk as *mut c_void
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}
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