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/*
* Copyright (C) 2025 Igalia S.L. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#pragma once
#ifndef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <stddef.h>
/* This file was inspired by malloc.h from MacOS. */
typedef struct _malloc_zone_t {
} malloc_zone_t;
typedef size_t vm_size_t;
/********* Creation and destruction ************/
extern malloc_zone_t *malloc_default_zone(void);
/* The initial zone */
extern malloc_zone_t *malloc_create_zone(vm_size_t start_size, unsigned flags);
/* Creates a new zone with default behavior and registers it */
/********* Block creation and manipulation ************/
extern void *malloc_zone_malloc(malloc_zone_t *zone, size_t size);
/* Allocates a new pointer of size size; zone must be non-NULL */
extern void *malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size);
/* Allocates a new pointer of size num_items * size; block is cleared; zone must be non-NULL */
extern void malloc_zone_free(malloc_zone_t *zone, void *ptr);
/* Frees pointer in zone; zone must be non-NULL */
extern void *malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size);
/* Enlarges block if necessary; zone must be non-NULL */
extern void *malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size);
/*
* Allocates a new pointer of size size whose address is an exact multiple of alignment.
* alignment must be a power of two and at least as large as sizeof(void *).
* zone must be non-NULL.
*/
/********* Functions for zone implementors ************/
extern void malloc_set_zone_name(malloc_zone_t *zone, const char *name);
/* Sets the name of a zone */
size_t malloc_zone_pressure_relief(malloc_zone_t *zone, size_t goal);
/* malloc_zone_pressure_relief() advises the malloc subsystem that the process is under memory pressure and
* that the subsystem should make its best effort towards releasing (i.e. munmap()-ing) "goal" bytes from "zone".
* If "goal" is passed as zero, the malloc subsystem will attempt to achieve maximal pressure relief in "zone".
* If "zone" is passed as NULL, all zones are examined for pressure relief opportunities.
* malloc_zone_pressure_relief() returns the number of bytes released.
*/
/********* Debug helpers ************/
extern void malloc_zone_print(malloc_zone_t *zone, bool verbose);
/* Prints summary on zone; if !zone, prints all zones */
#ifndef __cplusplus
}
#endif
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