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/*****************************************************************************
Copyright (c) 2006, 2016, Oracle and/or its affiliates. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/*******************************************************************//**
@file include/ut0vec.h
A vector of pointers to data items
Created 4/6/2006 Osku Salerma
************************************************************************/
#ifndef IB_VECTOR_H
#define IB_VECTOR_H
#include "mem0mem.h"
struct ib_alloc_t;
struct ib_vector_t;
typedef void* (*ib_mem_alloc_t)(
/* out: Pointer to allocated memory */
ib_alloc_t* allocator, /* in: Pointer to allocator instance */
ulint size); /* in: Number of bytes to allocate */
typedef void (*ib_mem_free_t)(
ib_alloc_t* allocator, /* in: Pointer to allocator instance */
void* ptr); /* in: Memory to free */
typedef void* (*ib_mem_resize_t)(
/* out: Pointer to resized memory */
ib_alloc_t* allocator, /* in: Pointer to allocator */
void* ptr, /* in: Memory to resize */
ulint old_size, /* in: Old memory size in bytes */
ulint new_size); /* in: New size in bytes */
typedef int (*ib_compare_t)(const void*, const void*);
/* An automatically resizing vector datatype with the following properties:
-All memory allocation is done through an allocator, which is responsible for
freeing it when done with the vector.
*/
/* This is useful shorthand for elements of type void* */
#define ib_vector_getp(v, n) (*(void**) ib_vector_get(v, n))
#define ib_vector_getp_const(v, n) (*(void**) ib_vector_get_const(v, n))
#define ib_vector_allocator(v) (v->allocator)
/********************************************************************
Create a new vector with the given initial size. */
ib_vector_t*
ib_vector_create(
/*=============*/
/* out: vector */
ib_alloc_t* alloc, /* in: Allocator */
/* in: size of the data item */
ulint sizeof_value,
ulint size); /* in: initial size */
/********************************************************************
Destroy the vector. Make sure the vector owns the allocator, e.g.,
the heap in the the heap allocator. */
UNIV_INLINE
void
ib_vector_free(
/*===========*/
ib_vector_t* vec); /* in/out: vector */
/********************************************************************
Push a new element to the vector, increasing its size if necessary,
if elem is not NULL then elem is copied to the vector.*/
UNIV_INLINE
void*
ib_vector_push(
/*===========*/
/* out: pointer the "new" element */
ib_vector_t* vec, /* in/out: vector */
const void* elem); /* in: data element */
/********************************************************************
Pop the last element from the vector.*/
UNIV_INLINE
void*
ib_vector_pop(
/*==========*/
/* out: pointer to the "new" element */
ib_vector_t* vec); /* in/out: vector */
/*******************************************************************//**
Remove an element to the vector
@return pointer to the "removed" element */
UNIV_INLINE
void*
ib_vector_remove(
/*=============*/
ib_vector_t* vec, /*!< in: vector */
const void* elem); /*!< in: value to remove */
/********************************************************************
Get the number of elements in the vector. */
UNIV_INLINE
ulint
ib_vector_size(
/*===========*/
/* out: number of elements in vector */
const ib_vector_t* vec); /* in: vector */
/********************************************************************
Increase the size of the vector. */
void
ib_vector_resize(
/*=============*/
/* out: number of elements in vector */
ib_vector_t* vec); /* in/out: vector */
/********************************************************************
Test whether a vector is empty or not.
@return TRUE if empty */
UNIV_INLINE
ibool
ib_vector_is_empty(
/*===============*/
const ib_vector_t* vec); /*!< in: vector */
/****************************************************************//**
Get the n'th element.
@return n'th element */
UNIV_INLINE
void*
ib_vector_get(
/*==========*/
ib_vector_t* vec, /*!< in: vector */
ulint n); /*!< in: element index to get */
/********************************************************************
Const version of the get n'th element.
@return n'th element */
UNIV_INLINE
const void*
ib_vector_get_const(
/*================*/
const ib_vector_t* vec, /* in: vector */
ulint n); /* in: element index to get */
/****************************************************************//**
Get last element. The vector must not be empty.
@return last element */
UNIV_INLINE
void*
ib_vector_get_last(
/*===============*/
ib_vector_t* vec); /*!< in: vector */
/****************************************************************//**
Set the n'th element. */
UNIV_INLINE
void
ib_vector_set(
/*==========*/
ib_vector_t* vec, /*!< in/out: vector */
ulint n, /*!< in: element index to set */
void* elem); /*!< in: data element */
/********************************************************************
Reset the vector size to 0 elements. */
UNIV_INLINE
void
ib_vector_reset(
/*============*/
ib_vector_t* vec); /* in/out: vector */
/********************************************************************
Get the last element of the vector. */
UNIV_INLINE
void*
ib_vector_last(
/*===========*/
/* out: pointer to last element */
ib_vector_t* vec); /* in/out: vector */
/********************************************************************
Get the last element of the vector. */
UNIV_INLINE
const void*
ib_vector_last_const(
/*=================*/
/* out: pointer to last element */
const ib_vector_t* vec); /* in: vector */
/********************************************************************
Sort the vector elements. */
UNIV_INLINE
void
ib_vector_sort(
/*===========*/
ib_vector_t* vec, /* in/out: vector */
ib_compare_t compare); /* in: the comparator to use for sort */
/********************************************************************
The default ib_vector_t heap free. Does nothing. */
UNIV_INLINE
void
ib_heap_free(
/*=========*/
ib_alloc_t* allocator, /* in: allocator */
void* ptr); /* in: size in bytes */
/********************************************************************
The default ib_vector_t heap malloc. Uses mem_heap_alloc(). */
UNIV_INLINE
void*
ib_heap_malloc(
/*===========*/
/* out: pointer to allocated memory */
ib_alloc_t* allocator, /* in: allocator */
ulint size); /* in: size in bytes */
/********************************************************************
The default ib_vector_t heap resize. Since we can't resize the heap
we have to copy the elements from the old ptr to the new ptr.
Uses mem_heap_alloc(). */
UNIV_INLINE
void*
ib_heap_resize(
/*===========*/
/* out: pointer to reallocated
memory */
ib_alloc_t* allocator, /* in: allocator */
void* old_ptr, /* in: pointer to memory */
ulint old_size, /* in: old size in bytes */
ulint new_size); /* in: new size in bytes */
/********************************************************************
Create a heap allocator that uses the passed in heap. */
UNIV_INLINE
ib_alloc_t*
ib_heap_allocator_create(
/*=====================*/
/* out: heap allocator instance */
mem_heap_t* heap); /* in: heap to use */
/********************************************************************
Free a heap allocator. */
UNIV_INLINE
void
ib_heap_allocator_free(
/*===================*/
ib_alloc_t* ib_ut_alloc); /* in: alloc instace to free */
/* Allocator used by ib_vector_t. */
struct ib_alloc_t {
ib_mem_alloc_t mem_malloc; /* For allocating memory */
ib_mem_free_t mem_release; /* For freeing memory */
ib_mem_resize_t mem_resize; /* For resizing memory */
void* arg; /* Currently if not NULL then it
points to the heap instance */
};
/* See comment at beginning of file. */
struct ib_vector_t {
ib_alloc_t* allocator; /* Allocator, because one size
doesn't fit all */
void* data; /* data elements */
ulint used; /* number of elements currently used */
ulint total; /* number of elements allocated */
/* Size of a data item */
ulint sizeof_value;
};
#include "ut0vec.ic"
#endif /* IB_VECTOR_H */
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