mirror of
https://github.com/freebsd/freebsd-src.git
synced 2026-10-30 12:25:10 +01:00
Faraz Vahedi
5f732742ad
Add C23 sized deallocation entry points as thin wrappers around free(3). Implementations may ignore size and alignment hints, so behaviour stays correct for existing allocations without validating caller metadata yet. When jemalloc is updated to 5.3.1, rewire these to je_free_sized() and je_free_aligned_sized() so deallocation can use the allocator's sized deallocation (free_sized for fast paths and free_aligned_sized for correct aligned hints.) Please note this change satisfies the standard interface only. Both functions should be delegated to jemalloc after the upgrade so callers get the intended allocator behaviour; until then, hints are unused and neither sized nor aligned-sized deallocation optimizations apply. Signed-off-by: Faraz Vahedi <[email protected]> Reviewed by: fuz Pull Request: https://github.com/freebsd/freebsd-src/pull/2201 MFC after: 1 month
119 lines
3.2 KiB
Plaintext
119 lines
3.2 KiB
Plaintext
.\" Copyright (c) 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd May 17, 2026
|
|
.Dt MEMORY 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm aligned_alloc ,
|
|
.Nm alloca ,
|
|
.Nm calloc ,
|
|
.Nm free ,
|
|
.Nm free_sized ,
|
|
.Nm free_aligned_sized ,
|
|
.Nm malloc ,
|
|
.Nm posix_memalign ,
|
|
.Nm realloc ,
|
|
.Nm reallocf ,
|
|
.Nm valloc ,
|
|
.Nm mmap ,
|
|
.Nm munmap
|
|
.Nd memory management functions
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In stdlib.h
|
|
.Ft void *
|
|
.Fn aligned_alloc "size_t alignment" "size_t size"
|
|
.Ft void *
|
|
.Fn alloca "size_t size"
|
|
.Ft void *
|
|
.Fn calloc "size_t nelem" "size_t elsize"
|
|
.Ft void
|
|
.Fn free "void *ptr"
|
|
.Ft void
|
|
.Fn free_sized "void *ptr" "size_t size"
|
|
.Ft void
|
|
.Fn free_aligned_sized "void *ptr" "size_t alignment" "size_t size"
|
|
.Ft void *
|
|
.Fn malloc "size_t size"
|
|
.Ft int
|
|
.Fn posix_memalign "void **ptr" "size_t alignment" "size_t size"
|
|
.Ft void *
|
|
.Fn realloc "void *ptr" "size_t size"
|
|
.Ft void *
|
|
.Fn reallocf "void *ptr" "size_t size"
|
|
.Ft void *
|
|
.Fn valloc "size_t size"
|
|
.In sys/types.h
|
|
.In sys/mman.h
|
|
.Ft void *
|
|
.Fn mmap "void * addr" "size_t len" "int prot" "int flags" "int fd" "off_t offset"
|
|
.Ft int
|
|
.Fn munmap "void *addr" "size_t len"
|
|
.Sh DESCRIPTION
|
|
These functions allocate and free memory for the calling process.
|
|
They are described in the
|
|
individual manual pages.
|
|
.Sh SEE ALSO
|
|
.Xr mmap 2 ,
|
|
.Xr aligned_alloc 3 ,
|
|
.Xr alloca 3 ,
|
|
.Xr calloc 3 ,
|
|
.Xr free 3 ,
|
|
.Xr free_aligned_sized 3 ,
|
|
.Xr free_sized 3 ,
|
|
.Xr malloc 3 ,
|
|
.Xr posix_memalign 3 ,
|
|
.Xr realloc 3 ,
|
|
.Xr reallocf 3 ,
|
|
.Xr valloc 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn calloc ,
|
|
.Fn free ,
|
|
.Fn malloc ,
|
|
and
|
|
.Fn realloc
|
|
functions conform to
|
|
.St -isoC .
|
|
.Pp
|
|
The
|
|
.Fn mmap ,
|
|
.Fn munmap ,
|
|
and
|
|
.Fn posix_memalign
|
|
functions conform to
|
|
.St -p1003.1-2001 .
|
|
.Pp
|
|
The
|
|
.Fn free_sized
|
|
and
|
|
.Fn free_aligned_sized
|
|
functions conform to
|
|
.St -isoC-2023 .
|