freem/src/global_bltin.c - diff

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Diff for /freem/src/global_bltin.c between versions 1.12 and 1.16

version 1.12, 2025/04/09 00:43:07	version 1.16, 2025/04/11 00:52:40
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 1.16 2025/04/11 00:52:40 snw
	* Replace all lseek/read calls in global handler to use gbl_read_block function
	*
	* Revision 1.15 2025/04/10 01:24:38 snw
	* Remove C++ style comments
	*
	* Revision 1.14 2025/04/09 19:52:02 snw
	* Eliminate as many warnings as possible while building with -Wall
	*
	* Revision 1.13 2025/04/09 14:34:30 snw
	* Further work on global_bltin.c refactor
	*
* Revision 1.12 2025/04/09 00:43:07 snw	* Revision 1.12 2025/04/09 00:43:07 snw
* Exit with fatal error if a header mismatch found	* Exit with fatal error if a header mismatch found
*	*
Line 69	Line 81
#include "global_bltin.h"	#include "global_bltin.h"

global_handle *global_handles_head;	global_handle *global_handles_head;
	unsigned long gbl_cache_misses = 0;
	unsigned long gbl_cache_hits = 0;

static void b_free (short filedes, unsigned long blknbr);	static void b_free (short filedes, unsigned long blknbr);
static void splitp (global_handle g, char block, long addr, long offs, unsigned long *blknbr);	static void splitp (global_handle g, char block, long addr, long offs, unsigned long *blknbr);
Line 78 static void scanpblk (char *block, long	Line 92 static void scanpblk (char *block, long
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);
static short int g_collate (char *t);	static short int g_collate (char *t);
//static short int g_numeric (char *str);
short g_numeric (char *str);	short g_numeric (char *str);
void close_all_globals(void);	void close_all_globals(void);
static void panic (void);	static void panic (void);
Line 129 static void panic (void);	Line 142 static void panic (void);
inline long gbl_path(char key, char buf)	inline long gbl_path(char key, char buf)
{	{
long savj;	long savj;
long savch; /* saved j and ch for multiple pathes */

register long int i;	register long int i;
register long int j;	register long int j;
register long int k;	register long int k;
register long int ch;	register long int ch;
long pathscan; /* flag for repeated scan of pathlist setting an undef global */

/* construct full UNIX filename */	/* construct full UNIX filename */
savj = 0;	savj = 0;
savch = ch = EOL;
pathscan = TRUE;
nextpath:
k = 0;	k = 0;
j = savj;	j = savj;

Line 165 nextpath:	Line 173 nextpath:
}	}

}	}

if (savj == 0 && ch == EOL) pathscan = FALSE; /* one path only: inhibit search */

if (k > 0) {	if (k > 0) {

Line 179 nextpath:	Line 185 nextpath:

}	}

savch = ch;
savj = j;	savj = j;
i = 0;	i = 0;
j = 0;	j = 0;
Line 212 nextpath:	Line 217 nextpath:
return i;	return i;
} /* gbl_path() */	} /* gbl_path() */

	void gbl_cache_hit(global_handle *g)
	{
	g->cache_hits++;
	gbl_cache_hits++;
	} /* gbl_cache_hit() */

	void gbl_cache_miss(global_handle *g)
	{
	g->fast_path = 0;
	g->cache_misses++;
	gbl_cache_misses++;
	} /* gbl_cache_miss() */

int gbl_lock(global_handle *g, int type)	int gbl_lock(global_handle *g, int type)
{	{
if (g->locked == TRUE \|\| lonelyflag == TRUE) {	if (g->locked == TRUE \|\| lonelyflag == TRUE) {
Line 220 int gbl_lock(global_handle *g, int type)	Line 238 int gbl_lock(global_handle *g, int type)

locking (g->fd, type, 0L);	locking (g->fd, type, 0L);
g->locked = TRUE;	g->locked = TRUE;

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

int gbl_unlock(global_handle *g)	int gbl_unlock(global_handle *g)
Line 230 int gbl_unlock(global_handle *g)	Line 250 int gbl_unlock(global_handle *g)

locking (g->fd, 0, 0L);	locking (g->fd, 0, 0L);
g->locked = FALSE;	g->locked = FALSE;

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

void gbl_close(global_handle *g)	void gbl_close(global_handle *g)
Line 379 int gbl_create(global_handle *g)	Line 401 int gbl_create(global_handle *g)
g->age = time (0L);	g->age = time (0L);
g->last_block = 0;	g->last_block = 0;
g->use_count = 1;	g->use_count = 1;
	g->fast_path = 0;

gbl_write_initial_header (g);	gbl_write_initial_header (g);

return OK;	return OK;
Line 390 short gbl_open(global_handle *g, short a	Line 413 short gbl_open(global_handle *g, short a
int result;	int result;

if (g->opened == FALSE) {	if (g->opened == FALSE) {
	gbl_cache_miss (g);
while (1) {	while (1) {
errno = 0;	errno = 0;
g->fd = open (g->global_path, 2);	g->fd = open (g->global_path, 2);
Line 450 short gbl_open(global_handle *g, short a	Line 474 short gbl_open(global_handle *g, short a

} /* gbl_open() */	} /* gbl_open() */

	int gbl_read_block(global_handle g, unsigned long blocknum, char block)
	{
	unsigned long hdr_offset;
	hdr_offset = sizeof (global_header);

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

	gbl_lock (g, 1);
	lseek (g->fd, hdr_offset + ((long) blocknum * (long) (g->header.block_size)), SEEK_SET);
	read (g->fd, block, g->header.block_size);
	g->last_block = blocknum;
	g->use_count++;
	g->read_ops++;
	gbl_unlock (g);

	return TRUE;
	}

global_handle gbl_handle(char key)	global_handle gbl_handle(char key)
{	{
global_handle *g;	global_handle *g;
char global_name[256];	char global_name[256];
int i;	int i;
long path_len;
char block[BLOCKLEN];
struct stat dinf;	struct stat dinf;

i = 0;	i = 0;
Line 497 global_handle gbl_handle(char key)	Line 539 global_handle gbl_handle(char key)
g->opened = FALSE;	g->opened = FALSE;
g->fd = 0;	g->fd = 0;
g->fast_path = -1;	g->fast_path = -1;
	g->cache_misses = 0;
	g->cache_hits = 0;
	g->read_ops = 0;
	g->write_ops = 0;

strcpy (g->global_name, global_name);	strcpy (g->global_name, global_name);
gbl_path (key, g->global_path);	gbl_path (key, g->global_path);
Line 591 void global_bltin (short action, char *k	Line 637 void global_bltin (short action, char *k
unsigned long hdr_offset;	unsigned long hdr_offset;

/* these must be static variables */	/* these must be static variables */
static short filedes; /* filedescr for global access */
static char filnam[256]; /* name of global/unix file */	static char filnam[256]; /* name of global/unix file */

/* the following vars may be */	/* the following vars may be */
Line 620 void global_bltin (short action, char *k	Line 665 void global_bltin (short action, char *k

int iresult;	int iresult;

struct stat dinf; /* get modification date */

long savj;
long savch; /* saved j and ch for multiple pathes */
register long int i;	register long int i;
register long int j;	register long int j;
register long int k;	register long int k;
register long int ch;	register long int ch;
long pathscan; /* flag for repeated scan of pathlist setting an undef global */

	j = 0;

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

/* process optional limitations */	/* process optional limitations */
Line 1042 reopen:	Line 1084 reopen:
/* odd numbered actions get read access (get_sym,data,fra_order) 3 */	/* odd numbered actions get read access (get_sym,data,fra_order) 3 */
/* even ones read/write access (set_sym,kill_sym) 1 */	/* even ones read/write access (set_sym,kill_sym) 1 */

	/* temporarily disabled
lock:	lock:
	*/

if (action == get_sym) {	if (action == get_sym) {

tfast0:	tfast0:
gbl_lock (g, 3);	gbl_lock (g, 3);
if (tryfast) goto tfast1; /* try again last block */
	if (g->fast_path > 0) goto tfast1; /* try again last block */

blknbr = g->last_block = ROOT; /* start with ROOT block */	blknbr = g->last_block = ROOT; /* start with ROOT block */

Line 1056 tfast0:	Line 1101 tfast0:


tfast1:	tfast1:
	gbl_read_block (g, blknbr, block);

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


tfast2:	tfast2:
	*/
if ((typ = block[BTYP]) == DATA) { /* scan data block: here we test for equality only */	if ((typ = block[BTYP]) == DATA) { /* scan data block: here we test for equality only */

offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
Line 1079 tfast2:	Line 1122 tfast2:
j = UNSIGN (block[i++]); /* length of key - offset */	j = UNSIGN (block[i++]); /* length of key - offset */
k = UNSIGN (block[i++]); /* offset into previous entry */	k = UNSIGN (block[i++]); /* offset into previous entry */

#ifdef VERSNEW

stcpy0 (&key0[k], &block[i], j);
i += j;
j += k;

#else

j += k;	j += k;

while (k < j) key1[k++] = block[i++]; /* get key */	while (k < j) key1[k++] = block[i++]; /* get key */

#endif /* VERSNEW */

if (j != ch) { /* keys have different length */	if (j != ch) { /* keys have different length */

i += UNSIGN (block[i]);	i += UNSIGN (block[i]);
Line 1126 tfast2:	Line 1159 tfast2:

/* fast access failed. try normal path */	/* fast access failed. try normal path */
if (tryfast) {	if (tryfast) {
tryfast = FALSE;	gbl_cache_miss (g);
goto tfast0;	goto tfast0;
}	}

Line 1137 tfast2:	Line 1170 tfast2:
}	}
else {	else {

if (tryfast) {	if (g->fast_path > 0) {
tryfast = FALSE;	gbl_cache_miss (g);
goto tfast0;	goto tfast0;
}	}

if (typ == EMPTY) {	if (typ == EMPTY) {

if (blknbr == ROOT) {	if (blknbr == ROOT) {
//close (filedes);
gbl_close (g);	gbl_close (g);
goto reopen;	goto reopen;
}	}
Line 1168 tfast2:	Line 1200 tfast2:

addr += PLEN; /* skip data */	addr += PLEN; /* skip data */
g->last_block = blknbr;	g->last_block = blknbr;
	g->fast_path = 1;

if (merr () == INRPT) goto quit;	if (merr () == INRPT) goto quit;

Line 1211 k_again: /* entry point for repeated	Line 1244 k_again: /* entry point for repeated

traceblk[trx] = blknbr;	traceblk[trx] = blknbr;
traceadr[trx] = 0;	traceadr[trx] = 0;

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

typ = block[BTYP];	typ = block[BTYP];

if (typ == DATA) {	if (typ == DATA) {
Line 1246 k_again: /* entry point for repeated	Line 1277 k_again: /* entry point for repeated

addr += PLEN; /* skip data */	addr += PLEN; /* skip data */
g->last_block = blknbr;	g->last_block = blknbr;
	g->fast_path = 1;
}	}

traceadr[trx] = addr;	traceadr[trx] = addr;
Line 1501 s20:	Line 1533 s20:
if (addr >= offset) {	if (addr >= offset) {

if ((blknbr = UNSIGN (block[RLPTR]) * 65536 + UNSIGN (block[RLPTR + 1]) * 256 + UNSIGN (block[RLPTR + 2]))) {	if ((blknbr = UNSIGN (block[RLPTR]) * 65536 + UNSIGN (block[RLPTR + 1]) * 256 + UNSIGN (block[RLPTR + 2]))) {

lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	gbl_read_block (g, blknbr, block);
read (g->fd, block, BLOCKLEN);
j1 = UNSIGN (block[0]);	j1 = UNSIGN (block[0]);

i = 0;	i = 0;
Line 1584 s20:	Line 1615 s20:

goto quit;	goto quit;
} /* no next block */	} /* no next block */

lseek (g->fd, hdr_offset + ((long) blknbr * (long) (BLOCKLEN)), SEEK_SET);	gbl_read_block (g, blknbr, block);
read (g->fd, block, BLOCKLEN);
scandblk (block, &addr, &found);	scandblk (block, &addr, &found);

}	}
Line 1742 s20:	Line 1772 s20:
goto quit; /* no next block */	goto quit; /* no next block */
}	}

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

addr = 0;	addr = 0;
offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
Line 1766 s20:	Line 1795 s20:
goto quit; /* no next block */	goto quit; /* no next block */
}	}

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

addr = 0;	addr = 0;
}	}
Line 1976 killo: /* entry from killone section	Line 2004 killo: /* entry from killone section

other = traceblk[--trx];	other = traceblk[--trx];
addr = traceadr[trx];	addr = traceadr[trx];

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

addr += UNSIGN (block[addr]);	addr += UNSIGN (block[addr]);
addr += (2 + PLEN); /* skip previous entry */	addr += (2 + PLEN); /* skip previous entry */
Line 1997 killo: /* entry from killone section	Line 2024 killo: /* entry from killone section

trx = trxsav;	trx = trxsav;

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

offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
UNSIGN (block[OFFS + 1]);	UNSIGN (block[OFFS + 1]);
Line 2104 p_empty: /* entry if pointer block goes	Line 2130 p_empty: /* entry if pointer block goes

if (left) {	if (left) {

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

block0[RLPTR] = block[RLPTR];	block0[RLPTR] = block[RLPTR];
block0[RLPTR + 1] = block[RLPTR + 1];	block0[RLPTR + 1] = block[RLPTR + 1];
Line 2117 p_empty: /* entry if pointer block goes	Line 2142 p_empty: /* entry if pointer block goes
}	}

if (right) {	if (right) {

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

block0[LLPTR] = block[LLPTR];	block0[LLPTR] = block[LLPTR];
block0[LLPTR + 1] = block[LLPTR + 1];	block0[LLPTR + 1] = block[LLPTR + 1];
Line 2143 p_empty: /* entry if pointer block goes	Line 2167 p_empty: /* entry if pointer block goes
blknbr = traceblk[--trx];	blknbr = traceblk[--trx];
addr = traceadr[trx];	addr = traceadr[trx];

lseek (g->fd, hdr_offset + ((long) (blknbr) * (long) (BLOCKLEN)), SEEK_SET);	gbl_read_block (g, blknbr, block);
read (g->fd, block, BLOCKLEN);
offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
UNSIGN (block[OFFS + 1]);	UNSIGN (block[OFFS + 1]);
freecnt = UNSIGN (block[addr]) + 2 + PLEN;	freecnt = UNSIGN (block[addr]) + 2 + PLEN;
Line 2262 zinv:	Line 2285 zinv:
data[0] = EOL1;	data[0] = EOL1;
goto quit;	goto quit;
} /* no previous block */	} /* no previous block */

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

addr = UNSIGN (block[OFFS]) * 256 +	addr = UNSIGN (block[OFFS]) * 256 +
UNSIGN (block[OFFS + 1]);	UNSIGN (block[OFFS + 1]);
Line 2443 zinv:	Line 2465 zinv:
break; /* no next block */	break; /* no next block */
}	}

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

addr = 0;	addr = 0;
offset = UNSIGN (block[OFFS]) * 256 +	offset = UNSIGN (block[OFFS]) * 256 +
Line 2610 splitd: /* split data block in two se	Line 2631 splitd: /* split data block in two se

char block0[BLOCKLEN];	char block0[BLOCKLEN];

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

block0[LLPTR] = blknbr / 65536;	block0[LLPTR] = blknbr / 65536;
block0[LLPTR + 1] = blknbr % 65536 / 256;	block0[LLPTR + 1] = blknbr % 65536 / 256;
Line 2773 splitd: /* split data block in two se	Line 2793 splitd: /* split data block in two se
/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {

lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	gbl_read_block (g, other, block0);
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;
Line 2815 splitd: /* split data block in two se	Line 2834 splitd: /* split data block in two se
/* up-date LL-PTR of RL-block */	/* up-date LL-PTR of RL-block */
if (other != 0) {	if (other != 0) {

lseek (g->fd, hdr_offset + ((long) other * (long) (BLOCKLEN)), SEEK_SET);	gbl_read_block (g, other, block0);
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;
Line 3653 static short int g_collate (char *t)	Line 3671 static short int g_collate (char *t)
/*	/*
* test whether 'str' is canonical	* test whether 'str' is canonical
*/	*/
//static short int g_numeric (char *str)
short g_numeric (char *str)	short g_numeric (char *str)
{	{
register int ptr = 0, ch;	register int ptr = 0, ch;
Line 3729 static void panic (void)	Line 3746 static void panic (void)
void gbl_dump_stat(void)	void gbl_dump_stat(void)
{	{
global_handle *g;	global_handle *g;
	int ct;
	int miss_pct;
	int hit_pct;
	unsigned long access_total;
	unsigned long hit_total;

printf ("FreeM Global Statistics [PID %d]\r\n", pid);	printf ("\r\nFreeM Global Statistics [PID %d]\r\n\r\n", pid);

printf ("%-20s%-10s%-20s%-10s%s\r\n", "GLOBAL", "USECT", "AGE", "LAST BLK", "FILE");	printf ("%-20s%-10s%-12s%-20s%-10s%s\r\n", "GLOBAL", "USECT", "SLOW PTHCT", "AGE", "LAST BLK", "FILE");
printf ("%-20s%-10s%-20s%-10s%s\r\n", "======", "=====", "===", "========", "====");	printf ("%-20s%-10s%-12s%-20s%-10s%s\r\n", "======", "=====", "==========", "===", "========", "====");

	access_total = 0;
	ct = 0;
for (g = global_handles_head; g != NULL; g = g->next) {	for (g = global_handles_head; g != NULL; g = g->next) {
printf ("%-20s%-10d%-20d%-10d%s\r\n", g->global_name, g->use_count, g->age, g->last_block, g->global_path);	printf ("%-20s%-10ld%-12ld%-20ld%-10ld%s\r\n",
}	g->global_name,
	g->use_count,
	g->cache_misses,
	g->age,
	g->last_block,
	g->global_path);
	ct++;
	access_total += g->use_count;
	}
	if (!ct) printf ("<no globals opened in this pid>\r\n");

	hit_total = access_total - gbl_cache_misses;
	miss_pct = (gbl_cache_misses * 100) / access_total;
	hit_pct = (hit_total * 100) / access_total;

	printf ("\r\nTotal accesses: %ld\r\n", access_total);
	printf ("Fast path hits %ld\t(%d%%)\r\n", hit_total, hit_pct);
	printf ("Fast path misses: %ld\t(%d%%)\r\n", gbl_cache_misses, miss_pct);
}	}

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Removed from v.1.12
changed lines
	Added in v.1.16