mirrors/labwc
1
0
Fork 0
mirror of https://github.com/labwc/labwc.git synced 2025-10-29 05:40:24 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

common/array.h: add array_add() helper

Browse source
This commit is contained in:
Consolatis 2024-08-02 21:57:19 +02:00
parent d9866aafa5
commit a9daaa05be
1 changed files with 32 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

32
include/common/array.h
View file

@ -1,6 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LABWC_ARRAY_H
#define LABWC_ARRAY_H
#include <stdio.h>
#include <stdlib.h>
#include <wayland-server-core.h>
/*
@ -41,4 +43,34 @@ wl_array_len(struct wl_array *array)
pos && (const char *)pos >= (const char *)(array)->data; \
(pos)--)
/**
* array_add() - add item to wl_array and exit on allocation error
* @_arr: wl_array to add the item to
* @_val: the item to add to the array
*
* Let us illustrate the function of this macro by an example:
*
* uint32_t value = 5;
* array_add(array, value);
*
* ...is the equivalent of the code below which is how you would
* otherwise use the wl_array API:
*
* uint32_t *elm = wl_array_add(array, sizeof(uint32_t));
* if (!elm) {
* perror("failed to allocate memory");
* exit(EXIT_FAILURE);
* }
* *elm = value;
*/
#define array_add(_arr, _val) do { \
__typeof__(_val) *_entry = wl_array_add( \
(_arr), sizeof(__typeof__(_val))); \
if (!_entry) { \
perror("Failed to allocate memory"); \
exit(EXIT_FAILURE); \
} \
*_entry = (_val); \
} while (0)
#endif /* LABWC_ARRAY_H */