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69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef LABWC_MEM_H
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#define LABWC_MEM_H
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#include <stdlib.h>
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/*
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* If ptr is NULL, prints an error (based on errno) and exits.
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* Suitable for checking the return value of malloc() etc.
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*/
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void die_if_null(void *ptr);
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/*
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* As defined in busybox, weston, etc.
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* Allocates zero-filled memory; calls exit() on error.
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* Returns NULL only if (size == 0).
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*/
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void *xzalloc(size_t size);
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/*
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* Type-safe macros in the style of C++ new/new[].
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* Both allocate zero-filled memory for object(s) the same size as
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* <expr>, which may be either a type name or value expression.
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*
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* znew() allocates space for one object.
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* znew_n() allocates space for an array of <n> objects.
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*
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* Examples:
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* struct wlr_box *box = znew(*box);
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* char *buf = znew_n(char, 80);
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*/
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#define znew(expr) ((__typeof__(expr) *)xzalloc(sizeof(expr)))
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#define znew_n(expr, n) ((__typeof__(expr) *)xzalloc((n) * sizeof(expr)))
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/*
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* As defined in FreeBSD.
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* Like realloc(), but calls exit() on error.
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* Returns NULL only if (size == 0).
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* Does NOT zero-fill memory.
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*/
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void *xrealloc(void *ptr, size_t size);
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/* malloc() is a specific case of realloc() */
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#define xmalloc(size) xrealloc(NULL, (size))
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/*
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* As defined in FreeBSD.
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* Allocates a copy of <str>; calls exit() on error.
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* Requires (str != NULL) and never returns NULL.
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*/
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char *xstrdup(const char *str);
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/*
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* Same as ptr = xstrdup(str) but free
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* <ptr> before assigning the result.
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*/
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#define xstrdup_replace(ptr, str) do { \
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free(ptr); (ptr) = xstrdup(str); \
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} while (0)
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/*
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* Frees memory pointed to by <ptr> and sets <ptr> to NULL.
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* Does nothing if <ptr> is already NULL.
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*/
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#define zfree(ptr) do { \
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free(ptr); (ptr) = NULL; \
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} while (0)
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#endif /* LABWC_MEM_H */
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