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74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
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#ifndef IB_VECTOR_H
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#define IB_VECTOR_H
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#include "univ.i"
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#include "mem0mem.h"
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typedef struct ib_vector_struct ib_vector_t;
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/* An automatically resizing vector datatype with the following properties:
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-Contains void* items.
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-The items are owned by the caller.
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-All memory allocation is done through a heap owned by the caller, who is
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responsible for freeing it when done with the vector.
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-When the vector is resized, the old memory area is left allocated since it
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uses the same heap as the new memory area, so this is best used for
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relatively small or short-lived uses.
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*/
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/********************************************************************
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Create a new vector with the given initial size. */
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ib_vector_t*
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ib_vector_create(
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/*=============*/
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/* out: vector */
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mem_heap_t* heap, /* in: heap */
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ulint size); /* in: initial size */
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/********************************************************************
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Push a new element to the vector, increasing its size if necessary. */
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void
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ib_vector_push(
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/*===========*/
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ib_vector_t* vec, /* in: vector */
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void* elem); /* in: data element */
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/********************************************************************
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Get the number of elements in the vector. */
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UNIV_INLINE
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ulint
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ib_vector_size(
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/*===========*/
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/* out: number of elements in vector */
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ib_vector_t* vec); /* in: vector */
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/********************************************************************
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Get the n'th element. */
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UNIV_INLINE
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void*
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ib_vector_get(
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/*==========*/
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/* out: n'th element */
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ib_vector_t* vec, /* in: vector */
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ulint n); /* in: element index to get */
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/* See comment at beginning of file. */
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struct ib_vector_struct {
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mem_heap_t* heap; /* heap */
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void** data; /* data elements */
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ulint used; /* number of elements currently used */
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ulint total; /* number of elements allocated */
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};
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#ifndef UNIV_NONINL
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#include "ut0vec.ic"
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#endif
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#endif
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