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re PR fortran/26766 ([F2003] Recursive I/O still (again) broken)

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2006-04-12  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/26766
	* io/io.h: Add bit to identify associated unit as internal.
	* io/unit.c (get_external_unit): Renamed the find_unit_1 function to
	reflect the external unit functionality vs internal unit.
	(get_internal_unit): New function to allocate and initialize an internal
	unit structure.
	(get_unit): Use get_internal_unit and get_external_unit.
	(is_internal_unit): Revised to use new bit added in io.h.
	* io/transfer.c (data_transfer_init): Fix line width.
	(st_read_done): Free memory allocated for internal unit.
	(st_write_done): Add test to only flush and truncate when not an
	internal unit.  Free memory allocated for internal unit.

From-SVN: r112914
This commit is contained in:
Jerry DeLisle 2006-04-13 06:24:58 +00:00
parent 7b5d92b270
commit 6f34d6e078
4 changed files with 108 additions and 51 deletions
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15
libgfortran/ChangeLog
View File

@ -1,3 +1,18 @@
2006-04-12 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/26766
* io/io.h: Add bit to identify associated unit as internal.
* io/unit.c (get_external_unit): Renamed the find_unit_1 function to
reflect the external unit functionality vs internal unit.
(get_internal_unit): New function to allocate and initialize an internal
unit structure.
(get_unit): Use get_internal_unit and get_external_unit.
(is_internal_unit): Revised to use new bit added in io.h.
* io/transfer.c (data_transfer_init): Fix line width.
(st_read_done): Free memory allocated for internal unit.
(st_write_done): Add test to only flush and truncate when not an
internal unit. Free memory allocated for internal unit.
2006-04-11 Jakub Jelinek <jakub@redhat.com>
* io/io.h (st_parameter_dt): Revert 2005-12-10 change to

5
libgfortran/io/io.h
View File

@ -414,7 +414,10 @@ typedef struct st_parameter_dt
/* A namelist specific flag used to enable reading input from
line_buffer for logical reads. */
unsigned line_buffer_enabled : 1;
/* 18 unused bits. */
/* An internal unit specific flag used to identify that the associated
unit is internal. */
unsigned unit_is_internal : 1;
/* 17 unused bits. */
char last_char;
char nml_delim;

17
libgfortran/io/transfer.c
View File

@ -1619,7 +1619,8 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag)
it is always safe to truncate the file on the first write */
if (dtp->u.p.mode == WRITING
&& dtp->u.p.current_unit->flags.access == ACCESS_SEQUENTIAL
&& dtp->u.p.current_unit->last_record == 0 && !is_preconnected(dtp->u.p.current_unit->s))
&& dtp->u.p.current_unit->last_record == 0
&& !is_preconnected(dtp->u.p.current_unit->s))
struncate(dtp->u.p.current_unit->s);
/* Bugware for badly written mixed C-Fortran I/O. */
@ -2317,6 +2318,8 @@ st_read_done (st_parameter_dt *dtp)
free_mem (dtp->u.p.scratch);
if (dtp->u.p.current_unit != NULL)
unlock_unit (dtp->u.p.current_unit);
if (is_internal_unit (dtp) && dtp->u.p.current_unit != NULL)
free_mem (dtp->u.p.current_unit);
library_end ();
}
@ -2353,10 +2356,12 @@ st_write_done (st_parameter_dt *dtp)
case NO_ENDFILE:
/* Get rid of whatever is after this record. */
flush (dtp->u.p.current_unit->s);
if (struncate (dtp->u.p.current_unit->s) == FAILURE)
generate_error (&dtp->common, ERROR_OS, NULL);
if (!is_internal_unit (dtp))
{
flush (dtp->u.p.current_unit->s);
if (struncate (dtp->u.p.current_unit->s) == FAILURE)
generate_error (&dtp->common, ERROR_OS, NULL);
}
dtp->u.p.current_unit->endfile = AT_ENDFILE;
break;
}
@ -2367,6 +2372,8 @@ st_write_done (st_parameter_dt *dtp)
free_mem (dtp->u.p.scratch);
if (dtp->u.p.current_unit != NULL)
unlock_unit (dtp->u.p.current_unit);
if (is_internal_unit (dtp) && dtp->u.p.current_unit != NULL)
free_mem (dtp->u.p.current_unit);
library_end ();
}

122
libgfortran/io/unit.c
View File

@ -75,7 +75,7 @@ Boston, MA 02110-1301, USA. */
#define CACHE_SIZE 3
static gfc_unit internal_unit, *unit_cache[CACHE_SIZE];
static gfc_unit *unit_cache[CACHE_SIZE];
gfc_offset max_offset;
gfc_unit *unit_root;
#ifdef __GTHREAD_MUTEX_INIT
@ -260,12 +260,12 @@ delete_unit (gfc_unit * old)
}
/* find_unit()-- Given an integer, return a pointer to the unit
/* get_external_unit()-- Given an integer, return a pointer to the unit
* structure. Returns NULL if the unit does not exist,
* otherwise returns a locked unit. */
static gfc_unit *
find_unit_1 (int n, int do_create)
get_external_unit (int n, int do_create)
{
gfc_unit *p;
int c, created = 0;
@ -346,58 +346,99 @@ found:
return p;
}
gfc_unit *
find_unit (int n)
{
return find_unit_1 (n, 0);
return get_external_unit (n, 0);
}
gfc_unit *
find_or_create_unit (int n)
{
return find_unit_1 (n, 1);
return get_external_unit (n, 1);
}
gfc_unit *
get_internal_unit (st_parameter_dt *dtp)
{
gfc_unit * iunit;
/* Allocate memory for a unit structure. */
iunit = get_mem (sizeof (gfc_unit));
if (iunit == NULL)
{
generate_error (&dtp->common, ERROR_INTERNAL_UNIT, NULL);
return NULL;
}
memset (iunit, '\0', sizeof (gfc_unit));
iunit->recl = dtp->internal_unit_len;
/* Set up the looping specification from the array descriptor, if any. */
if (is_array_io (dtp))
{
iunit->rank = GFC_DESCRIPTOR_RANK (dtp->internal_unit_desc);
iunit->ls = (array_loop_spec *)
get_mem (iunit->rank * sizeof (array_loop_spec));
dtp->internal_unit_len *=
init_loop_spec (dtp->internal_unit_desc, iunit->ls);
}
/* Set initial values for unit parameters. */
iunit->s = open_internal (dtp->internal_unit, dtp->internal_unit_len);
iunit->bytes_left = iunit->recl;
iunit->last_record=0;
iunit->maxrec=0;
iunit->current_record=0;
iunit->read_bad = 0;
/* Set flags for the internal unit. */
iunit->flags.access = ACCESS_SEQUENTIAL;
iunit->flags.action = ACTION_READWRITE;
iunit->flags.form = FORM_FORMATTED;
iunit->flags.pad = PAD_YES;
iunit->flags.status = STATUS_UNSPECIFIED;
/* Initialize the data transfer parameters. */
dtp->u.p.advance_status = ADVANCE_YES;
dtp->u.p.blank_status = BLANK_UNSPECIFIED;
dtp->u.p.seen_dollar = 0;
dtp->u.p.skips = 0;
dtp->u.p.pending_spaces = 0;
dtp->u.p.max_pos = 0;
/* This flag tells us the unit is assigned to internal I/O. */
dtp->u.p.unit_is_internal = 1;
return iunit;
}
/* get_unit()-- Returns the unit structure associated with the integer
* unit or the internal file. */
gfc_unit *
get_unit (st_parameter_dt *dtp, int do_create)
{
if ((dtp->common.flags & IOPARM_DT_HAS_INTERNAL_UNIT) != 0)
{
__gthread_mutex_lock (&internal_unit.lock);
internal_unit.recl = dtp->internal_unit_len;
if (is_array_io (dtp))
{
internal_unit.rank = GFC_DESCRIPTOR_RANK (dtp->internal_unit_desc);
internal_unit.ls = (array_loop_spec *)
get_mem (internal_unit.rank * sizeof (array_loop_spec));
dtp->internal_unit_len *=
init_loop_spec (dtp->internal_unit_desc, internal_unit.ls);
}
internal_unit.s =
open_internal (dtp->internal_unit, dtp->internal_unit_len);
internal_unit.bytes_left = internal_unit.recl;
internal_unit.last_record=0;
internal_unit.maxrec=0;
internal_unit.current_record=0;
/* Set flags for the internal unit */
internal_unit.flags.access = ACCESS_SEQUENTIAL;
internal_unit.flags.action = ACTION_READWRITE;
internal_unit.flags.form = FORM_FORMATTED;
internal_unit.flags.delim = DELIM_NONE;
internal_unit.flags.pad = PAD_YES;
return &internal_unit;
}
return get_internal_unit(dtp);
/* Has to be an external unit */
return find_unit_1 (dtp->common.unit, do_create);
dtp->u.p.unit_is_internal = 0;
return get_external_unit (dtp->common.unit, do_create);
}
@ -406,7 +447,7 @@ get_unit (st_parameter_dt *dtp, int do_create)
int
is_internal_unit (st_parameter_dt *dtp)
{
return dtp->u.p.current_unit == &internal_unit;
return dtp->u.p.unit_is_internal;
}
@ -432,15 +473,6 @@ init_units (void)
__GTHREAD_MUTEX_INIT_FUNCTION (&unit_lock);
#endif
#ifdef __GTHREAD_MUTEX_INIT
{
__gthread_mutex_t tmp = __GTHREAD_MUTEX_INIT;
internal_unit.lock = tmp;
}
#else
__GTHREAD_MUTEX_INIT_FUNCTION (&internal_unit.lock);
#endif
if (options.stdin_unit >= 0)
{ /* STDIN */
u = insert_unit (options.stdin_unit);