hdrl_buffer.c File Reference

#include "hdrl_buffer.h"
#include "hdrl_types.h"
#include "hdrl_utils.h"
#include <cpl.h>
#include <cxlist.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>

Include dependency graph for hdrl_buffer.c:

Data Structures
struct	_hdrl_buffer_
struct	hdrl_pool_base
struct	hdrl_pool_mmap
struct	hdrl_pool_malloc

Macros
#define	_POSIX_C_SOURCE   200112L /* posix_fallocate, ftruncate */
#define	_XOPEN_SOURCE   600

Typedefs
typedef hdrl_pool_base	hdrl_pool

Functions
hdrl_buffer *	hdrl_buffer_new (void)
	Create buffer object.
size_t	hdrl_buffer_set_malloc_threshold (hdrl_buffer *buf, size_t t)
	set total amount of memory the buffer can malloc
void	hdrl_buffer_readonly (hdrl_buffer *buf, cpl_boolean ro)
char *	hdrl_buffer_allocate (hdrl_buffer *buf, size_t size)
	Allocate memory block from buffer.
void	hdrl_buffer_free (hdrl_buffer *HDRL_UNUSED(buf), char *p)
void	hdrl_buffer_delete (hdrl_buffer *buf)
	delete buffer

Macro Definition Documentation

_POSIX_C_SOURCE

#define _POSIX_C_SOURCE   200112L /* posix_fallocate, ftruncate */

_XOPEN_SOURCE

#define _XOPEN_SOURCE   600

Typedef Documentation

hdrl_pool

typedef hdrl_pool_base hdrl_pool

Function Documentation

hdrl_buffer_allocate()

char * hdrl_buffer_allocate	(	hdrl_buffer *	buf,
		size_t	size
	)

Allocate memory block from buffer.

Parameters

buf	buffer object
size	size of memory to allocate

Returns

writable memory block, or NULL on failure

hdrl_buffer_delete()

void hdrl_buffer_delete

(

hdrl_buffer *

buf

)

delete buffer

Parameters

buf

buffer

Invalidates memory of all objects contained in the buffer

hdrl_buffer_free()

void hdrl_buffer_free	(	hdrl_buffer *	HDRL_UNUSEDbuf,
		char *	p
	)

hdrl_buffer_new()

hdrl_buffer * hdrl_buffer_new

(

void

)

Create buffer object.

Returns

buffer object useable to obtain memory mapped memory

hdrl_buffer_readonly()

void hdrl_buffer_readonly	(	hdrl_buffer *	buf,
		cpl_boolean	ro
	)

hdrl_buffer_set_malloc_threshold()

size_t hdrl_buffer_set_malloc_threshold	(	hdrl_buffer *	buf,
		size_t	t
	)

set total amount of memory the buffer can malloc

Parameters

buf	buffer object
t	amount of memory in MiB

Returns

old amount in wMiB

Note

changing threshold will only affect future allocation