jmemmgr.c File Reference

#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h"

Data Structures
struct	jvirt_barray_control
struct	jvirt_sarray_control
union	large_pool_struct
struct	my_memory_mgr
union	small_pool_struct

Macros
#define	ALIGN_TYPE   double
#define	AM_MEMORY_MANAGER   /* we define jvirt_Xarray_control structs */
#define	JPEG_INTERNALS
#define	MIN_SLOP   50 /* greater than 0 to avoid futile looping */

Typedefs
typedef union large_pool_struct	large_pool_hdr
typedef union large_pool_struct FAR *	large_pool_ptr
typedef my_memory_mgr *	my_mem_ptr
typedef union small_pool_struct	small_pool_hdr
typedef union small_pool_struct *	small_pool_ptr

Functions
	access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr, JDIMENSION start_row, JDIMENSION num_rows, boolean writable)
	access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr, JDIMENSION start_row, JDIMENSION num_rows, boolean writable)
	alloc_barray (j_common_ptr cinfo, int pool_id, JDIMENSION blocksperrow, JDIMENSION numrows)
	alloc_sarray (j_common_ptr cinfo, int pool_id, JDIMENSION samplesperrow, JDIMENSION numrows)
	for (sptr=mem->virt_sarray_list;sptr!=NULL;sptr=sptr->next)
	for (bptr=mem->virt_barray_list;bptr!=NULL;bptr=bptr->next)
	for (i=0;i< (long) ptr->rows_in_mem;i+=ptr->rowsperchunk)
	free_pool (j_common_ptr cinfo, int pool_id)
	if (sizeofobject,(size_t)(MAX_ALLOC_CHUNK-SIZEOF(small_pool_hdr)))
	if (hdr_ptr==NULL)
	jinit_memory_mgr (j_common_ptr cinfo)
	request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero, JDIMENSION blocksperrow, JDIMENSION numrows, JDIMENSION maxaccess)
	request_virt_sarray (j_common_ptr cinfo, int pool_id, boolean pre_zero, JDIMENSION samplesperrow, JDIMENSION numrows, JDIMENSION maxaccess)
	return (void *)
	self_destruct (j_common_ptr cinfo)

Variables
long	avail_mem
jvirt_barray_ptr	bptr
hdr_ptr hdr	bytes_left = sizeofobject
hdr_ptr hdr	bytes_used = sizeofobject
	bytesperrow = (long) ptr->samplesperrow * SIZEOF(JSAMPLE)
char *	data_ptr = (char *) (hdr_ptr + 1)
	else
static const size_t	extra_pool_slop [JPOOL_NUMPOOLS]
	file_offset = ptr->cur_start_row * bytesperrow
static const size_t	first_pool_slop [JPOOL_NUMPOOLS]
small_pool_ptr	hdr_ptr
long	max_minheights = 1000000000L
long	maximum_space = 0
size_t	min_request
long	minheights
size_t	odd_bytes
small_pool_ptr	prev_hdr_ptr
	return
size_t	slop
long	space_per_minheight
jvirt_sarray_ptr	sptr

#define ALIGN_TYPE   double

Referenced by jinit_memory_mgr().

#define AM_MEMORY_MANAGER   /* we define jvirt_Xarray_control structs */

#define JPEG_INTERNALS

#define MIN_SLOP   50 /* greater than 0 to avoid futile looping */

Referenced by if().

typedef union large_pool_struct large_pool_hdr

typedef union large_pool_struct FAR* large_pool_ptr

typedef my_memory_mgr* my_mem_ptr

typedef union small_pool_struct small_pool_hdr

typedef union small_pool_struct* small_pool_ptr

access_virt_barray	(	j_common_ptr	cinfo,
		jvirt_barray_ptr	ptr,
		JDIMENSION	start_row,
		JDIMENSION	num_rows,
		boolean	writable
	)

References ERREXIT, FALSE, FAR, NULL, num_rows, SIZEOF, and TRUE.

Referenced by jinit_memory_mgr().

access_virt_sarray	(	j_common_ptr	cinfo,
		jvirt_sarray_ptr	ptr,
		JDIMENSION	start_row,
		JDIMENSION	num_rows,
		boolean	writable
	)

References ERREXIT, FALSE, FAR, NULL, num_rows, SIZEOF, and TRUE.

Referenced by jinit_memory_mgr().

alloc_barray	(	j_common_ptr	cinfo,
		int	pool_id,
		JDIMENSION	blocksperrow,
		JDIMENSION	numrows
	)

References ERREXIT, i, my_memory_mgr::last_rowsperchunk, MAX_ALLOC_CHUNK, MIN, and SIZEOF.

Referenced by jinit_memory_mgr().

alloc_sarray	(	j_common_ptr	cinfo,
		int	pool_id,
		JDIMENSION	samplesperrow,
		JDIMENSION	numrows
	)

References ERREXIT, i, my_memory_mgr::last_rowsperchunk, MAX_ALLOC_CHUNK, MIN, samplesperrow, and SIZEOF.

Referenced by jinit_memory_mgr().

for

(

sptr

= mem->virt_sarray_list; sptr != NULL; sptr = sptr->next

)

References jvirt_sarray_control::maxaccess, maximum_space, jvirt_sarray_control::mem_buffer, NULL, jvirt_sarray_control::rows_in_array, jvirt_sarray_control::samplesperrow, SIZEOF, and sptr.

for

(

bptr

= mem->virt_barray_list; bptr != NULL; bptr = bptr->next

)

References jvirt_barray_control::blocksperrow, bptr, jvirt_barray_control::maxaccess, maximum_space, jvirt_barray_control::mem_buffer, NULL, jvirt_barray_control::rows_in_array, and SIZEOF.

for

(

i

= 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk

)

References bytesperrow, cinfo, FAR, file_offset, i, and MIN.

free_pool	(	j_common_ptr	cinfo,
		int	pool_id
	)

References jvirt_sarray_control::b_s_info, jvirt_barray_control::b_s_info, jvirt_sarray_control::b_s_open, jvirt_barray_control::b_s_open, bptr, small_pool_struct::bytes_used, ERREXIT1, FALSE, FAR, small_pool_struct::hdr, large_pool_struct::hdr, if(), jpeg_free_large(), jpeg_free_small(), JPOOL_IMAGE, JPOOL_NUMPOOLS, my_memory_mgr::large_list, small_pool_struct::next, large_pool_struct::next, jvirt_sarray_control::next, jvirt_barray_control::next, NULL, SIZEOF, my_memory_mgr::small_list, sptr, my_memory_mgr::total_space_allocated, my_memory_mgr::virt_barray_list, and my_memory_mgr::virt_sarray_list.

Referenced by jinit_memory_mgr(), and self_destruct().

if	(	sizeofobject	,
		(size_t)(MAX_ALLOC_CHUNK-SIZEOF(small_pool_hdr))
	)

if

(

hdr_ptr

= = NULL

)

References small_pool_struct::bytes_left, small_pool_struct::bytes_used, small_pool_struct::hdr, hdr_ptr, jpeg_get_small(), MAX_ALLOC_CHUNK, min_request, MIN_SLOP, small_pool_struct::next, NULL, prev_hdr_ptr, SIZEOF, slop, my_memory_mgr::small_list, and my_memory_mgr::total_space_allocated.

jinit_memory_mgr

(

j_common_ptr

cinfo

)

References access_virt_barray(), access_virt_sarray(), ALIGN_TYPE, alloc_barray(), alloc_sarray(), ERREXIT, ERREXIT1, free_pool(), jpeg_get_small(), jpeg_mem_init(), jpeg_mem_term(), JPOOL_NUMPOOLS, JPOOL_PERMANENT, my_memory_mgr::large_list, MAX_ALLOC_CHUNK, jpeg_memory_mgr::max_alloc_chunk, jpeg_memory_mgr::max_memory_to_use, NULL, my_memory_mgr::pub, request_virt_barray(), request_virt_sarray(), self_destruct(), SIZEOF, my_memory_mgr::small_list, my_memory_mgr::total_space_allocated, my_memory_mgr::virt_barray_list, and my_memory_mgr::virt_sarray_list.

Referenced by jpeg_CreateDecompress().

request_virt_barray	(	j_common_ptr	cinfo,
		int	pool_id,
		boolean	pre_zero,
		JDIMENSION	blocksperrow,
		JDIMENSION	numrows,
		JDIMENSION	maxaccess
	)

References ERREXIT1, FALSE, if(), JPOOL_IMAGE, NULL, SIZEOF, and my_memory_mgr::virt_barray_list.

Referenced by jinit_memory_mgr().

request_virt_sarray	(	j_common_ptr	cinfo,
		int	pool_id,
		boolean	pre_zero,
		JDIMENSION	samplesperrow,
		JDIMENSION	numrows,
		JDIMENSION	maxaccess
	)

References ERREXIT1, FALSE, if(), JPOOL_IMAGE, NULL, samplesperrow, SIZEOF, and my_memory_mgr::virt_sarray_list.

Referenced by jinit_memory_mgr().

return

(

void *

)

self_destruct

(

j_common_ptr

cinfo

)

References free_pool(), jpeg_free_small(), jpeg_mem_term(), JPOOL_NUMPOOLS, JPOOL_PERMANENT, NULL, and SIZEOF.

Referenced by jinit_memory_mgr().

avail_mem

Initial value:

= jpeg_mem_available(cinfo, space_per_minheight, maximum_space,
                 mem->total_space_allocated)

jvirt_barray_ptr bptr

Referenced by find_best_colors(), for(), and free_pool().

hdr_ptr hdr bytes_left = sizeofobject

hdr_ptr hdr bytes_used = sizeofobject

bytesperrow = (long) ptr->samplesperrow * SIZEOF(JSAMPLE)

Referenced by for().

data_ptr = (char *) (hdr_ptr + 1)

else

Initial value:

{
    max_minheights = avail_mem / space_per_minheight

const size_t extra_pool_slop[JPOOL_NUMPOOLS]

static

Initial value:

=
{
    0,          
    5000            
}

file_offset = ptr->cur_start_row * bytesperrow

Referenced by for().

const size_t first_pool_slop[JPOOL_NUMPOOLS]

static

Initial value:

=
{
    1600,           
    16000           
}

small_pool_ptr hdr_ptr

Initial value:

{
  my_mem_ptr mem = (my_mem_ptr) cinfo->mem

Referenced by if().

max_minheights = 1000000000L

maximum_space = 0

Referenced by for().

size_t min_request

Referenced by if().

long minheights

size_t odd_bytes

small_pool_ptr prev_hdr_ptr

Referenced by if().

return

size_t slop

Referenced by if().

space_per_minheight

Initial value:

{
  my_mem_ptr mem = (my_mem_ptr) cinfo->mem

jvirt_sarray_ptr sptr

Referenced by for(), and free_pool().