wl_array

Section: Wayland (3)
Updated: Thu Jan 28 2021
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NAME

wl_array

SYNOPSIS

Public Member Functions

void wl_array_init (struct wl_array *array)

void wl_array_release (struct wl_array *array)

void * wl_array_add (struct wl_array *array, size_t size)

int wl_array_copy (struct wl_array *array, struct wl_array *source)

Data Fields

size_t size

size_t alloc

void * data

Related Functions

(Note that these are not member functions.)
#define wl_array_for_each(pos, array)

Detailed Description

Dynamic array

A wl_array is a dynamic array that can only grow until released. It is intended for relatively small allocations whose size is variable or not known in advance. While construction of a wl_array does not require all elements to be of the same size, wl_array_for_each() does require all elements to have the same type and size.

Member Function Documentation

void * wl_array_add (struct wl_array * array, size_t size)

Increases the size of the array by size bytes.

Parameters

: array Array whose size is to be increased
size Number of bytes to increase the size of the array by

Returns

: A pointer to the beginning of the newly appended space, or NULL when resizing fails.

int wl_array_copy (struct wl_array * array, struct wl_array * source)

Copies the contents of source to array.

Parameters

: array Destination array to copy to
source Source array to copy from

Returns

: 0 on success, or -1 on failure

void wl_array_init (struct wl_array * array)

Initializes the array.

Parameters

: array Array to initialize

void wl_array_release (struct wl_array * array)

Releases the array data.

Note

: Leaves the array in an invalid state.

Parameters

: array Array whose data is to be released

Friends And Related Function Documentation

#define wl_array_for_each(pos, array) [related]

Value:

     for (pos = (array)->data;                                                    (const char *) pos < ((const char *) (array)->data + (array)->size);              (pos)++)

Iterates over an array.

This macro expresses a for-each iterator for wl_array. It assigns each element in the array to pos, which can then be referenced in a trailing code block. pos must be a pointer to the array element type, and all array elements must be of the same type and size.

Parameters

: pos Cursor that each array element will be assigned to
array Array to iterate over

See also

: wl_list_for_each()

Field Documentation

size_t wl_array::alloc

Allocated space

void* wl_array::data

Array data

size_t wl_array::size

Array size

Author

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