qbarray.h - Online Linux Manual PageSection : 3
Updated : 11 May 2016
Source : Version 0.17.1
Note : libqb

NAMEqbarray.h − This is a dynamic array (it can grow, but without moving memory).

SYNOPSIS
#include <stdint.h>
#include <unistd.h>
#include <qb/qbdefs.h>

Typedefstypedef struct qb_array qb_array_t
This is an opaque data type representing an instance of an array.
typedef void(* qb_array_new_bin_cb_fn )(qb_array_t *a, uint32_t bin)

Functionsqb_array_t * qb_array_create (size_t max_elements, size_t element_size)
Create an array with fixed sized elements.
qb_array_t * qb_array_create_2 (size_t max_elements, size_t element_size, size_t autogrow_elements)
Create an array with fixed sized elements.
int32_t qb_array_index (qb_array_t *a, int32_t idx, void **element_out)
Get an element at a particular index.
int32_t qb_array_grow (qb_array_t *a, size_t max_elements)
Grow the array.
size_t qb_array_num_bins_get (qb_array_t *a)
Get the number of bins used or the array.
size_t qb_array_elems_per_bin_get (qb_array_t *a)
Get the number of elements per bin.
int32_t qb_array_new_bin_cb_set (qb_array_t *a, qb_array_new_bin_cb_fn fn)
Get a callback when a new bin is allocated.
void qb_array_free (qb_array_t *a)
Free all the memory used by the array.

Detailed DescriptionThis is a dynamic array (it can grow, but without moving memory). arr = qb_array_create_2(64, sizeof(struct my_struct), 256); ... res = qb_array_index(arr, idx, (void**)&my_ptr); if (res < 0) { return res; } // use my_ptr, now even if there is a grow, this pointer will be valid.

Typedef Documentation

typedef void(* qb_array_new_bin_cb_fn)(qb_array_t *a, uint32_t bin)

typedef struct qb_array qb_array_tThis is an opaque data type representing an instance of an array.

Function Documentation

qb_array_t* qb_array_create (size_t max_elements, size_t element_size)Create an array with fixed sized elements. Parameters: max_elements initial max elements.
element_size size of each element.
Returns: array instance.

qb_array_t* qb_array_create_2 (size_t max_elements, size_t element_size, size_t autogrow_elements)Create an array with fixed sized elements. Parameters: max_elements initial max elements.
element_size size of each element.
autogrow_elements the number of elements to grow automatically by.
Returns: array instance.

size_t qb_array_elems_per_bin_get (qb_array_t * a)Get the number of elements per bin.

void qb_array_free (qb_array_t * a)Free all the memory used by the array. Parameters: a array instance.

int32_t qb_array_grow (qb_array_t * a, size_t max_elements)Grow the array. Parameters: a array instance.
max_elements the new maximum size of the array.
Returns: (0 == success, else -errno)

int32_t qb_array_index (qb_array_t * a, int32_t idx, void ** element_out)Get an element at a particular index. Parameters: a array instance.
idx the index
element_out the pointer to the element data.
Returns: (0 == success, else -errno)

int32_t qb_array_new_bin_cb_set (qb_array_t * a, qb_array_new_bin_cb_fn fn)Get a callback when a new bin is allocated.

size_t qb_array_num_bins_get (qb_array_t * a)Get the number of bins used or the array.

AuthorGenerated automatically by Doxygen for libqb from the source code.
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Johanes Gumabo
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