freem/src/global_bltin.c - diff

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Diff for /freem/src/global_bltin.c between versions 1.9 and 1.12

version 1.9, 2025/04/08 16:46:11	version 1.12, 2025/04/09 00:43:07
Line 24	Line 24
* along with FreeM. If not, see <https://www.gnu.org/licenses/>.	* along with FreeM. If not, see <https://www.gnu.org/licenses/>.
*	*
* $Log$	* $Log$
	* Revision 1.12 2025/04/09 00:43:07 snw
	* Exit with fatal error if a header mismatch found
	*
	* Revision 1.11 2025/04/08 21:41:13 snw
	* Make insert, update, and splitp global handler functions take a ptr to a global_handle instead of a file descriptor
	*
	* Revision 1.10 2025/04/08 20:00:56 snw
	* Global handler now uses a header file and maintains the last journaling transaction ID
	*
* Revision 1.9 2025/04/08 16:46:11 snw	* Revision 1.9 2025/04/08 16:46:11 snw
* Add global file header and offsets	* Add global file header and offsets
*	*
Line 56	Line 65
#include <errno.h>	#include <errno.h>

#include "mpsdef.h"	#include "mpsdef.h"
	#include "journal.h"
#include "global_bltin.h"	#include "global_bltin.h"

global_handle *global_handles_head;	global_handle *global_handles_head;

static void b_free (short filedes, unsigned long blknbr);	static void b_free (short filedes, unsigned long blknbr);
static void splitp (short filedes, char block, long addr, long offs, unsigned long blknbr);	static void splitp (global_handle g, char block, long addr, long offs, unsigned long *blknbr);
static void update (short filedes, char *ins_key, long keyl);	static void update (global_handle g, char ins_key, long keyl);
static void insert (int filedes, char *ins_key, long key_len, unsigned long blknbr);	static void insert (global_handle g, char ins_key, long key_len, unsigned long blknbr);
static void scanpblk (char block, long adr, long *fnd);	static void scanpblk (char block, long adr, long *fnd);
static void scandblk (char block, long adr, long *fnd);	static void scandblk (char block, long adr, long *fnd);
static void getnewblk (int filedes, unsigned long *blknbr);	static void getnewblk (int filedes, unsigned long *blknbr);
Line 244 void gbl_close_all(void)	Line 254 void gbl_close_all(void)
}	}
} /* gbl_close_all() */	} /* gbl_close_all() */

int gbl_write_header(global_handle *g)	int gbl_write_initial_header(global_handle *g)
{	{
global_header hdr;	global_header hdr;
unsigned long old_position;	unsigned long old_position;
Line 268 int gbl_write_header(global_handle *g)	Line 278 int gbl_write_header(global_handle *g)
lseek (g->fd, 0, SEEK_SET);	lseek (g->fd, 0, SEEK_SET);

if (write (g->fd, &hdr, sizeof (global_header)) == -1) {	if (write (g->fd, &hdr, sizeof (global_header)) == -1) {
snprintf (msg, 256, "error %d writing global header for %s", errno, g->global_name);	snprintf (msg, sizeof (msg), "error %d writing global header for %s", errno, g->global_name);
m_fatal (msg);	m_fatal (msg);
}	}

Line 276 int gbl_write_header(global_handle *g)	Line 286 int gbl_write_header(global_handle *g)
gbl_unlock (g);	gbl_unlock (g);

return TRUE;	return TRUE;
	} /* gbl_write_initial_header() */


	int gbl_write_header(global_handle g, global_header hdr)
	{
	unsigned long old_position;
	char msg[256];

	if (g->opened == FALSE) {
	return FALSE;
	}

	gbl_lock (g, 1);
	old_position = lseek (g->fd, 0, SEEK_CUR);
	lseek (g->fd, 0, SEEK_SET);

	if (write (g->fd, hdr, sizeof (global_header)) == -1) {
	snprintf (msg, sizeof (msg), "error %d writing global header for %s", errno, g->global_name);
	m_fatal (msg);
	}

	lseek (g->fd, old_position, SEEK_SET);
	gbl_unlock (g);

	gbl_read_header (g, &g->header);

	return TRUE;
} /* gbl_write_header() */	} /* gbl_write_header() */

	int gbl_read_header(global_handle g, global_header h)
	{
	unsigned long old_position;
	char m[5] = GBL_MAGIC;


	if (g->opened == FALSE) {
	return GBL_HDR_NOTOPEN;
	}

	gbl_lock (g, 1);
	old_position = lseek (g->fd, 0, SEEK_CUR);
	lseek (g->fd, 0, SEEK_SET);

	read (g->fd, h, sizeof (global_header));

	lseek (g->fd, old_position, SEEK_SET);
	gbl_unlock (g);

	if (strncmp (h->magic, m, 5) != 0) {
	return GBL_HDR_BADMAGIC;
	}
	if (h->format_version != GBL_FORMAT_VERSION) {
	return GBL_HDR_BADVERSION;
	}
	if (h->block_size != BLOCKLEN) {
	return GBL_HDR_BADBLOCKSIZE;
	}

	return GBL_HDR_OK;
	} /* gbl_read_header() */

	int gbl_update_tid(global_handle *g)
	{
	global_header h;

	if (gbl_read_header (g, &h) != GBL_HDR_OK) {
	return FALSE;
	}

	h.last_transaction_id = jnl_tran_id;

	return gbl_write_header (g, &h);
	} /* gbl_update_tid() */

int gbl_create(global_handle *g)	int gbl_create(global_handle *g)
{	{
while (1) {	while (1) {
Line 298 int gbl_create(global_handle *g)	Line 380 int gbl_create(global_handle *g)
g->last_block = 0;	g->last_block = 0;
g->use_count = 1;	g->use_count = 1;

gbl_write_header (g);	gbl_write_initial_header (g);

return OK;	return OK;
} /* gbl_create() */	} /* gbl_create() */

short gbl_open(global_handle *g, short action)	short gbl_open(global_handle *g, short action)
{	{
	int result;

if (g->opened == FALSE) {	if (g->opened == FALSE) {
while (1) {	while (1) {
errno = 0;	errno = 0;
Line 318 short gbl_open(global_handle *g, short a	Line 402 short gbl_open(global_handle *g, short a

case EMFILE:	case EMFILE:
case ENFILE:	case ENFILE:
close_all_globals ();	gbl_close_all ();
continue;	continue;
}	}

Line 334 short gbl_open(global_handle *g, short a	Line 418 short gbl_open(global_handle *g, short a
}	}
else {	else {
g->opened = TRUE;	g->opened = TRUE;
	result = gbl_read_header (g, &g->header);

	if (result == GBL_HDR_OK) {
	g->opened = TRUE;
	}
	else {
	gbl_close (g);
	set_io (UNIX);

	switch (result) {

	case GBL_HDR_BADMAGIC:
	fprintf (stderr, "gbl_open: bad magic value in %s [FATAL]\n", g->global_name);
	exit (1);
	break;

	case GBL_HDR_BADVERSION:
	fprintf (stderr, "gbl_open: global version is %d in %s (must be %d) [FATAL]\n", g->header.format_version, g->global_name, GBL_FORMAT_VERSION);
	exit (1);
	break;

	}

	return FALSE;
	}
}	}
}	}

Line 1274 s10: {	Line 1383 s10: {
lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);
write (g->fd, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);

if (traceadr[trx] == 0) update (g->fd, compactkey, keyl);	if (traceadr[trx] == 0) update (g, compactkey, keyl);

break;	break;
}	}
Line 1360 s20:	Line 1469 s20:
stcpy0 (&block[++addr], data, (long) datal);	stcpy0 (&block[++addr], data, (long) datal);
lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);
write (g->fd, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);

	gbl_update_tid (g);

break;	break;


Line 2082 p_empty: /* entry if pointer block goes	Line 2194 p_empty: /* entry if pointer block goes
if (addr == 0) { /* update of pointer */	if (addr == 0) { /* update of pointer */
traceadr[trx] = 0;	traceadr[trx] = 0;

update (g->fd, &block[2], (long) UNSIGN (block[0]));	update (g, &block[2], (long) UNSIGN (block[0]));
}	}

trx = trxsav;	trx = trxsav;
Line 2128 p_empty: /* entry if pointer block goes	Line 2240 p_empty: /* entry if pointer block goes
write (g->fd, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);
if (addr < 3) { /* update of pointer */	if (addr < 3) { /* update of pointer */
traceadr[trx] = 0;	traceadr[trx] = 0;
update (g->fd, &block[2], (long) UNSIGN (block[0]));	update (g, &block[2], (long) UNSIGN (block[0]));
}	}
}	}

Line 2491 splitd: /* split data block in two se	Line 2603 splitd: /* split data block in two se
addr = 0;	addr = 0;
blknbr = newblk;	blknbr = newblk;

insert (g->fd, compactkey, keyl, newblk);	insert (g, compactkey, keyl, newblk);

/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if ((other = right * 65536 + right1 * 256 + right2)) {	if ((other = right * 65536 + right1 * 256 + right2)) {
Line 2537 splitd: /* split data block in two se	Line 2649 splitd: /* split data block in two se
blknbr = newblk;	blknbr = newblk;
traceadr[trx] = (-1); /* inhibit second update of pointers */	traceadr[trx] = (-1); /* inhibit second update of pointers */

insert (g->fd, compactkey, keyl, newblk);	insert (g, compactkey, keyl, newblk);

if (addr < 3) { /* update of pointer */	if (addr < 3) { /* update of pointer */
traceadr[trx] = 0;	traceadr[trx] = 0;

update (g->fd, compactkey, keyl);	update (g, compactkey, keyl);
}	}

/* other is *always* zero !!!	/* other is *always* zero !!!
Line 2656 splitd: /* split data block in two se	Line 2768 splitd: /* split data block in two se
offset = limit;	offset = limit;
/* insert new block in pointer structure */	/* insert new block in pointer structure */

insert (g->fd, &block0[2], (long) UNSIGN (block0[0]), newblk);	insert (g, &block0[2], (long) UNSIGN (block0[0]), newblk);

/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {
Line 2698 splitd: /* split data block in two se	Line 2810 splitd: /* split data block in two se
traceblk[trx] = (blknbr = newblk);	traceblk[trx] = (blknbr = newblk);

/* insert new block in pointer structure */	/* insert new block in pointer structure */
insert (g->fd, &block0[2], (long) UNSIGN (block0[0]), newblk);	insert (g, &block0[2], (long) UNSIGN (block0[0]), newblk);

/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {
Line 2738 spltex:	Line 2850 spltex:
* 'addr' there I would like to insert, if possible (which is not)	* 'addr' there I would like to insert, if possible (which is not)
* 'offset' filled up to this limit	* 'offset' filled up to this limit
*/	*/
static void splitp (short filedes, char block, long addr, long offs, unsigned long blknbr)	static void splitp (global_handle g, char block, long addr, long offs, unsigned long *blknbr)
{	{

char block0[BLOCKLEN];	char block0[BLOCKLEN];
Line 2751 static void splitp (short filedes, char	Line 2863 static void splitp (short filedes, char

hdr_offset = sizeof (global_header);	hdr_offset = sizeof (global_header);

getnewblk (filedes, &newblk); /* get a new block */	getnewblk (g->fd, &newblk); /* get a new block */

if (blknbr == ROOT) { / ROOT overflow is special */	if (blknbr == ROOT) { / ROOT overflow is special */

Line 2786 static void splitp (short filedes, char	Line 2898 static void splitp (short filedes, char
block0[NRBLK + 2] = i % 256;	block0[NRBLK + 2] = i % 256;
block0[BTYP] = POINTER;	block0[BTYP] = POINTER;

lseek (filedes, hdr_offset + ROOT, SEEK_SET);	lseek (g->fd, hdr_offset + ROOT, SEEK_SET);
write (filedes, block0, BLOCKLEN);	write (g->fd, block0, BLOCKLEN);

/* shift trace_stack */	/* shift trace_stack */
j = trx++;	j = trx++;
Line 2804 static void splitp (short filedes, char	Line 2916 static void splitp (short filedes, char
traceblk[1] = newblk;	traceblk[1] = newblk;
*blknbr = newblk;	*blknbr = newblk;

getnewblk (filedes, &newblk); /* get a new block */	getnewblk (g->fd, &newblk); /* get a new block */

}	}

Line 2858 static void splitp (short filedes, char	Line 2970 static void splitp (short filedes, char
block0[LLPTR + 1] = (*blknbr) % 65536 / 256;	block0[LLPTR + 1] = (*blknbr) % 65536 / 256;
block0[LLPTR + 2] = (*blknbr) % 256;	block0[LLPTR + 2] = (*blknbr) % 256;

lseek (filedes, hdr_offset + ((long) (newblk) * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) (newblk) * (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block0, BLOCKLEN);	write (g->fd, block0, BLOCKLEN);

(*offs) = limit;	(*offs) = limit;

insert (filedes, &block0[2], (long) UNSIGN (block0[0]), newblk);	insert (g, &block0[2], (long) UNSIGN (block0[0]), newblk);

/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {

lseek (filedes, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);
read (filedes, block0, BLOCKLEN);	read (g->fd, block0, BLOCKLEN);

block0[LLPTR] = newblk / 65536;	block0[LLPTR] = newblk / 65536;
block0[LLPTR + 1] = newblk % 65536 / 256;	block0[LLPTR + 1] = newblk % 65536 / 256;
block0[LLPTR + 2] = newblk % 256;	block0[LLPTR + 2] = newblk % 256;

lseek (filedes, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block0, BLOCKLEN);	write (g->fd, block0, BLOCKLEN);

}	}

Line 2901 static void splitp (short filedes, char	Line 3013 static void splitp (short filedes, char
(*addr) -= limit;	(*addr) -= limit;
(*offs) -= limit;	(*offs) -= limit;

lseek (filedes, hdr_offset + ((long) (blknbr) (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) (blknbr) (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);
stcpy0 (block, block0, (long) BLOCKLEN);	stcpy0 (block, block0, (long) BLOCKLEN);

(*blknbr) = newblk;	(*blknbr) = newblk;

insert (filedes, &block0[2], (long) UNSIGN (block0[0]), newblk);	insert (g, &block0[2], (long) UNSIGN (block0[0]), newblk);

/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {

lseek (filedes, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);
read (filedes, block0, BLOCKLEN);	read (g->fd, block0, BLOCKLEN);

block0[LLPTR] = newblk / 65536;	block0[LLPTR] = newblk / 65536;
block0[LLPTR + 1] = newblk % 65536 / 256;	block0[LLPTR + 1] = newblk % 65536 / 256;
block0[LLPTR + 2] = newblk % 256;	block0[LLPTR + 2] = newblk % 256;

lseek (filedes, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block0, BLOCKLEN);	write (g->fd, block0, BLOCKLEN);

}	}

Line 2935 static void splitp (short filedes, char	Line 3047 static void splitp (short filedes, char
* ins_key: key to be inserted	* ins_key: key to be inserted
* keyl: length of that key	* keyl: length of that key
*/	*/
static void update (short filedes, char *ins_key, long keyl)	static void update (global_handle g, char ins_key, long keyl)
{	{
long offset;	long offset;
long addr;	long addr;
Line 2953 static void update (short filedes, char	Line 3065 static void update (short filedes, char
blknbr = traceblk[trx];	blknbr = traceblk[trx];
addr = traceadr[trx];	addr = traceadr[trx];

lseek (filedes, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);
read (filedes, block, BLOCKLEN);	read (g->fd, block, BLOCKLEN);

{	{
long oldkeyl;	long oldkeyl;
Line 2981 static void update (short filedes, char	Line 3093 static void update (short filedes, char
else if (j < 0) { /* we need more space */	else if (j < 0) { /* we need more space */

/* block too small */	/* block too small */
if ((offset - j) > DATALIM) splitp (filedes, block, &addr, &offset, &blknbr);	if ((offset - j) > DATALIM) splitp (g, block, &addr, &offset, &blknbr);

i = offset;	i = offset;
offset -= j;	offset -= j;
Line 3004 static void update (short filedes, char	Line 3116 static void update (short filedes, char
while (i < keyl) block[j++] = ins_key[i++];	while (i < keyl) block[j++] = ins_key[i++];

/* block pointed to remains the same */	/* block pointed to remains the same */
lseek (filedes, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);

}	}

lseek (filedes, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);
read (filedes, block, BLOCKLEN);	read (g->fd, block, BLOCKLEN);

}	}

Line 3025 static void update (short filedes, char	Line 3137 static void update (short filedes, char
* key_len: length of that key	* key_len: length of that key
* blknbr: key points to this block	* blknbr: key points to this block
*/	*/
static void insert (int filedes, char ins_key, long key_len, unsigned long blknbr) / insert pointer */	static void insert (global_handle g, char ins_key, long key_len, unsigned long blknbr) /* insert pointer */
{	{
unsigned long blk;	unsigned long blk;
char block[BLOCKLEN];	char block[BLOCKLEN];
Line 3042 static void insert (int filedes, char *i	Line 3154 static void insert (int filedes, char *i
blk = traceblk[trx];	blk = traceblk[trx];
addr = traceadr[trx];	addr = traceadr[trx];

lseek (filedes, hdr_offset + ((long) (blk) * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) (blk) * (long) (BLOCKLEN)), SEEK_SET);
read (filedes, block, BLOCKLEN);	read (g->fd, block, BLOCKLEN);

offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
UNSIGN (block[OFFS + 1]);	UNSIGN (block[OFFS + 1]);
Line 3055 static void insert (int filedes, char *i	Line 3167 static void insert (int filedes, char *i

needed = key_len + 2 + PLEN;	needed = key_len + 2 + PLEN;

if ((offset + needed) > DATALIM) splitp (filedes, block, &addr, &offset, &blk);	if ((offset + needed) > DATALIM) splitp (g, block, &addr, &offset, &blk);

/* insert key */	/* insert key */
i = (offset += needed);	i = (offset += needed);
Line 3079 static void insert (int filedes, char *i	Line 3191 static void insert (int filedes, char *i
block[i++] = blknbr % 65536 / 256;	block[i++] = blknbr % 65536 / 256;
block[i] = blknbr % 256;	block[i] = blknbr % 256;

lseek (filedes, hdr_offset + ((long) (blk) * (long) (BLOCKLEN)), SEEK_SET);	lseek (g->fd, hdr_offset + ((long) (blk) * (long) (BLOCKLEN)), SEEK_SET);
write (filedes, block, BLOCKLEN);	write (g->fd, block, BLOCKLEN);

trx = trxsav;	trx = trxsav;

Line 3584 short g_numeric (char *str)	Line 3696 short g_numeric (char *str)

} /* end g_numeric() */	} /* end g_numeric() */


	/* DEPRECATED: use gbl_close_all() instead */
void close_all_globals (void)	void close_all_globals (void)
{	{
register int i;	gbl_close_all ();

for (i = 0; i < NO_GLOBLS; i++) {

if (oldfil[i][0] != NUL) {

close (olddes[i]);

usage[i] = 0;
olddes[i] = 0;
oldfil[i][0] = NUL;

}

}

return;	return;

} /* end close_all_globals() */	} /* end close_all_globals() */

static void panic (void)	static void panic (void)

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	Added in v.1.12