NAME

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

SYNOPSIS

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

   Typedefs
       typedef 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)

   Functions
       qb_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 Description

       This 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_t
       This 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.

Author

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