minix/servers/inet/buf.c
Kees van Reeuwijk 5459f3a607 Removed a whole herd of unused variables.
Some other cleanup.
2010-01-14 13:53:12 +00:00

1253 lines
25 KiB
C

/*
This file contains routines for buffer management.
Copyright 1995 Philip Homburg
*/
#include "inet.h"
#include <stdlib.h>
#include <string.h>
#include "generic/assert.h"
#include "generic/buf.h"
THIS_FILE
#ifndef BUF_USEMALLOC
#define BUF_USEMALLOC 0
#endif
#ifndef BUF512_NR
#define BUF512_NR 512
#endif
#ifndef BUF2K_NR
#define BUF2K_NR 0
#endif
#ifndef BUF32K_NR
#define BUF32K_NR 0
#endif
#define ACC_NR ((BUF512_NR+BUF2K_NR+BUF32K_NR)*3)
#define CLIENT_NR 10
#define DECLARE_TYPE(Tag, Type, Size) \
typedef struct Tag \
{ \
buf_t buf_header; \
char buf_data[Size]; \
} Type
#if BUF_USEMALLOC
#define DECLARE_STORAGE(Type, Ident, Nitems) \
PRIVATE Type *Ident
#define ALLOC_STORAGE(Ident, Nitems, Label) \
do \
{ \
printf("buf.c: malloc %d %s\n", Nitems, Label); \
Ident= malloc(sizeof(*Ident) * Nitems); \
if (!Ident) \
ip_panic(( "unable to alloc %s", Label )); \
} while(0)
#else
#define DECLARE_STORAGE(Type, Ident, Nitems) \
PRIVATE Type Ident[Nitems]
#define ALLOC_STORAGE(Ident, Nitems, Label) \
(void)0
#endif
#if BUF512_NR
DECLARE_TYPE(buf512, buf512_t, 512);
PRIVATE acc_t *buf512_freelist;
DECLARE_STORAGE(buf512_t, buffers512, BUF512_NR);
FORWARD void bf_512free ARGS(( acc_t *acc ));
#endif
#if BUF2K_NR
DECLARE_TYPE(buf2K, buf2K_t, (2*1024));
PRIVATE acc_t *buf2K_freelist;
DECLARE_STORAGE(buf2K_t, buffers2K, BUF2K_NR);
FORWARD void bf_2Kfree ARGS(( acc_t *acc ));
#endif
#if BUF32K_NR
DECLARE_TYPE(buf32K, buf32K_t, (32*1024));
PRIVATE acc_t *buf32K_freelist;
DECLARE_STORAGE(buf32K_t, buffers32K, BUF32K_NR);
FORWARD void bf_32Kfree ARGS(( acc_t *acc ));
#endif
PRIVATE acc_t *acc_freelist;
DECLARE_STORAGE(acc_t, accessors, ACC_NR);
PRIVATE bf_freereq_t freereq[CLIENT_NR];
PRIVATE size_t bf_buf_gran;
PUBLIC size_t bf_free_bufsize;
PUBLIC acc_t *bf_temporary_acc;
PUBLIC acc_t *bf_linkcheck_acc;
#ifdef BUF_CONSISTENCY_CHECK
int inet_buf_debug;
unsigned buf_generation;
PRIVATE bf_checkreq_t checkreq[CLIENT_NR];
#endif
#ifndef BUF_TRACK_ALLOC_FREE
FORWARD acc_t *bf_small_memreq ARGS(( size_t size ));
#else
FORWARD acc_t *_bf_small_memreq ARGS(( char *clnt_file, int clnt_line,
size_t size ));
#define bf_small_memreq(a) _bf_small_memreq(clnt_file, clnt_line, a)
#endif
FORWARD void free_accs ARGS(( void ));
#ifdef BUF_CONSISTENCY_CHECK
FORWARD void count_free_bufs ARGS(( acc_t *list ));
FORWARD int report_buffer ARGS(( buf_t *buf, char *label, int i ));
#endif
PUBLIC void bf_init()
{
int i;
size_t buf_s;
acc_t *acc;
bf_buf_gran= BUF_S;
buf_s= 0;
for (i=0;i<CLIENT_NR;i++)
freereq[i]=0;
#ifdef BUF_CONSISTENCY_CHECK
for (i=0;i<CLIENT_NR;i++)
checkreq[i]=0;
#endif
#if BUF512_NR
ALLOC_STORAGE(buffers512, BUF512_NR, "512B-buffers");
#endif
#if BUF2K_NR
ALLOC_STORAGE(buffers2K, BUF2K_NR, "2K-buffers");
#endif
#if BUF32K_NR
ALLOC_STORAGE(buffers32K, BUF32K_NR, "32K-buffers");
#endif
ALLOC_STORAGE(accessors, ACC_NR, "accs");
acc_freelist= NULL;
for (i=0;i<ACC_NR;i++)
{
memset(&accessors[i], '\0', sizeof(accessors[i]));
accessors[i].acc_linkC= 0;
accessors[i].acc_next= acc_freelist;
acc_freelist= &accessors[i];
}
#define INIT_BUFFERS(Ident, Nitems, Freelist, Freefunc) \
do \
{ \
Freelist= NULL; \
for (i=0;i<Nitems;i++) \
{ \
acc= acc_freelist; \
if (!acc) \
ip_panic(( "fewer accessors than buffers")); \
acc_freelist= acc->acc_next; \
acc->acc_linkC= 0; \
\
memset(&Ident[i], '\0', sizeof(Ident[i])); \
Ident[i].buf_header.buf_linkC= 0; \
Ident[i].buf_header.buf_free= Freefunc; \
Ident[i].buf_header.buf_size= \
sizeof(Ident[i].buf_data); \
Ident[i].buf_header.buf_data_p= \
Ident[i].buf_data; \
\
acc->acc_buffer= &Ident[i].buf_header; \
acc->acc_next= Freelist; \
Freelist= acc; \
} \
if (sizeof(Ident[0].buf_data) < bf_buf_gran) \
bf_buf_gran= sizeof(Ident[0].buf_data); \
if (sizeof(Ident[0].buf_data) > buf_s) \
buf_s= sizeof(Ident[0].buf_data); \
} while(0)
#if BUF512_NR
INIT_BUFFERS(buffers512, BUF512_NR, buf512_freelist, bf_512free);
#endif
#if BUF2K_NR
INIT_BUFFERS(buffers2K, BUF2K_NR, buf2K_freelist, bf_2Kfree);
#endif
#if BUF32K_NR
INIT_BUFFERS(buffers32K, BUF32K_NR, buf32K_freelist, bf_32Kfree);
#endif
#undef INIT_BUFFERS
assert (buf_s == BUF_S);
}
#ifndef BUF_CONSISTENCY_CHECK
PUBLIC void bf_logon(func)
bf_freereq_t func;
#else
PUBLIC void bf_logon(func, checkfunc)
bf_freereq_t func;
bf_checkreq_t checkfunc;
#endif
{
int i;
for (i=0;i<CLIENT_NR;i++)
if (!freereq[i])
{
freereq[i]=func;
#ifdef BUF_CONSISTENCY_CHECK
checkreq[i]= checkfunc;
#endif
return;
}
ip_panic(( "buf.c: too many clients" ));
}
/*
bf_memreq
*/
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_memreq(size)
#else
PUBLIC acc_t *_bf_memreq(clnt_file, clnt_line, size)
char *clnt_file;
int clnt_line;
#endif
size_t size;
{
acc_t *head, *tail, *new_acc;
buf_t *buf;
int i,j;
size_t count;
assert (size>0);
head= NULL;
tail= NULL;
while (size)
{
new_acc= NULL;
/* Note the tricky dangling else... */
#define ALLOC_BUF(Freelist, Bufsize) \
if (Freelist && (Bufsize == BUF_S || size <= Bufsize)) \
{ \
new_acc= Freelist; \
Freelist= new_acc->acc_next; \
\
assert(new_acc->acc_linkC == 0); \
new_acc->acc_linkC= 1; \
buf= new_acc->acc_buffer; \
assert(buf->buf_linkC == 0); \
buf->buf_linkC= 1; \
} \
else
/* Sort attempts by buffer size */
#if BUF512_NR
ALLOC_BUF(buf512_freelist, 512)
#endif
#if BUF2K_NR
ALLOC_BUF(buf2K_freelist, 2*1024)
#endif
#if BUF32K_NR
ALLOC_BUF(buf32K_freelist, 32*1024)
#endif
#undef ALLOC_BUF
{
DBLOCK(2, printf("freeing buffers\n"));
bf_free_bufsize= 0;
for (i=0; bf_free_bufsize<size && i<MAX_BUFREQ_PRI;
i++)
{
for (j=0; j<CLIENT_NR; j++)
{
if (freereq[j])
(*freereq[j])(i);
}
#if DEBUG && 0
{ acc_t *acc;
j= 0; for(acc= buf512_freelist; acc; acc= acc->acc_next) j++;
printf("# of free 512-bytes buffer is now %d\n", j); }
#endif
}
#if DEBUG && 0
{ printf("last level was level %d\n", i-1); }
#endif
if (bf_free_bufsize<size)
ip_panic(( "not enough buffers freed" ));
continue;
}
#ifdef BUF_TRACK_ALLOC_FREE
new_acc->acc_alloc_file= clnt_file;
new_acc->acc_alloc_line= clnt_line;
buf->buf_alloc_file= clnt_file;
buf->buf_alloc_line= clnt_line;
#endif
if (!head)
head= new_acc;
else
tail->acc_next= new_acc;
tail= new_acc;
count= tail->acc_buffer->buf_size;
if (count > size)
count= size;
tail->acc_offset= 0;
tail->acc_length= count;
size -= count;
}
tail->acc_next= NULL;
return head;
}
/*
bf_small_memreq
*/
#ifndef BUF_TRACK_ALLOC_FREE
PRIVATE acc_t *bf_small_memreq(size)
#else
PRIVATE acc_t *_bf_small_memreq(clnt_file, clnt_line, size)
char *clnt_file;
int clnt_line;
#endif
size_t size;
{
return bf_memreq(size);
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC void bf_afree(acc)
#else
PUBLIC void _bf_afree(clnt_file, clnt_line, acc)
char *clnt_file;
int clnt_line;
#endif
acc_t *acc;
{
acc_t *next_acc;
buf_t *buf;
while (acc)
{
#if defined(bf_afree)
DIFBLOCK(1, (acc->acc_linkC <= 0),
printf("clnt_file= %s, clnt_line= %d\n",
clnt_file, clnt_line));
#endif
assert (acc->acc_linkC>0);
if (--acc->acc_linkC > 0)
break;
#ifdef BUF_TRACK_ALLOC_FREE
acc->acc_free_file= clnt_file;
acc->acc_free_line= clnt_line;
#endif
buf= acc->acc_buffer;
assert (buf);
#if defined(bf_afree)
DIFBLOCK(1, (buf->buf_linkC == 0),
printf("clnt_file= %s, clnt_line= %d\n",
clnt_file, clnt_line));
#endif
assert (buf->buf_linkC>0);
if (--buf->buf_linkC > 0)
{
acc->acc_buffer= NULL;
next_acc= acc->acc_next;
acc->acc_next= acc_freelist;
acc_freelist= acc;
#ifdef BUF_CONSISTENCY_CHECK
if (inet_buf_debug)
{
acc->acc_offset= 0xdeadbeaf;
acc->acc_length= 0xdeadbeaf;
acc->acc_buffer= (buf_t *)0xdeadbeaf;
acc->acc_ext_link= (acc_t *)0xdeadbeaf;
}
#endif
acc= next_acc;
continue;
}
bf_free_bufsize += buf->buf_size;
#ifdef BUF_TRACK_ALLOC_FREE
buf->buf_free_file= clnt_file;
buf->buf_free_line= clnt_line;
#endif
next_acc= acc->acc_next;
buf->buf_free(acc);
acc= next_acc;
continue;
}
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_dupacc(acc_ptr)
#else
PUBLIC acc_t *_bf_dupacc(clnt_file, clnt_line, acc_ptr)
char *clnt_file;
int clnt_line;
#endif
register acc_t *acc_ptr;
{
register acc_t *new_acc;
if (!acc_freelist)
{
free_accs();
if (!acc_freelist)
ip_panic(( "buf.c: out of accessors" ));
}
new_acc= acc_freelist;
acc_freelist= new_acc->acc_next;
*new_acc= *acc_ptr;
if (acc_ptr->acc_next)
acc_ptr->acc_next->acc_linkC++;
if (acc_ptr->acc_buffer)
acc_ptr->acc_buffer->buf_linkC++;
new_acc->acc_linkC= 1;
#ifdef BUF_TRACK_ALLOC_FREE
new_acc->acc_alloc_file= clnt_file;
new_acc->acc_alloc_line= clnt_line;
#endif
return new_acc;
}
PUBLIC size_t bf_bufsize(acc_ptr)
register acc_t *acc_ptr;
{
register size_t size;
assert(acc_ptr);
size=0;
while (acc_ptr)
{
assert(acc_ptr >= accessors && acc_ptr <= &accessors[ACC_NR-1]);
size += acc_ptr->acc_length;
acc_ptr= acc_ptr->acc_next;
}
return size;
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_packIffLess(pack, min_len)
#else
PUBLIC acc_t *_bf_packIffLess(clnt_file, clnt_line, pack, min_len)
char *clnt_file;
int clnt_line;
#endif
acc_t *pack;
int min_len;
{
if (!pack || pack->acc_length >= min_len)
return pack;
#if DEBUG
#ifdef bf_packIffLess
{ where(); printf("calling bf_pack because of %s %d: %d\n", bf_pack_file,
bf_pack_line, min_len); }
#endif
#endif
return bf_pack(pack);
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_pack(old_acc)
#else
PUBLIC acc_t *_bf_pack(clnt_file, clnt_line, old_acc)
char *clnt_file;
int clnt_line;
#endif
acc_t *old_acc;
{
acc_t *new_acc, *acc_ptr_old, *acc_ptr_new;
size_t size, offset_old, offset_new, block_size, block_size_old;
/* Check if old acc is good enough. */
if (!old_acc || (!old_acc->acc_next && old_acc->acc_linkC == 1 &&
old_acc->acc_buffer->buf_linkC == 1))
{
return old_acc;
}
size= bf_bufsize(old_acc);
assert(size > 0);
new_acc= bf_memreq(size);
acc_ptr_old= old_acc;
acc_ptr_new= new_acc;
offset_old= 0;
offset_new= 0;
while (size)
{
assert (acc_ptr_old);
if (offset_old == acc_ptr_old->acc_length)
{
offset_old= 0;
acc_ptr_old= acc_ptr_old->acc_next;
continue;
}
assert (offset_old < acc_ptr_old->acc_length);
block_size_old= acc_ptr_old->acc_length - offset_old;
assert (acc_ptr_new);
if (offset_new == acc_ptr_new->acc_length)
{
offset_new= 0;
acc_ptr_new= acc_ptr_new->acc_next;
continue;
}
assert (offset_new < acc_ptr_new->acc_length);
block_size= acc_ptr_new->acc_length - offset_new;
if (block_size > block_size_old)
block_size= block_size_old;
memcpy(ptr2acc_data(acc_ptr_new)+offset_new,
ptr2acc_data(acc_ptr_old)+offset_old, block_size);
offset_new += block_size;
offset_old += block_size;
size -= block_size;
}
bf_afree(old_acc);
return new_acc;
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_cut (data, offset, length)
#else
PUBLIC acc_t *_bf_cut (clnt_file, clnt_line, data, offset, length)
char *clnt_file;
int clnt_line;
#endif
register acc_t *data;
register unsigned offset;
register unsigned length;
{
register acc_t *head, *tail;
if (!data && !offset && !length)
return NULL;
#ifdef BUF_TRACK_ALLOC_FREE
assert(data ||
(printf("from %s, %d: %u, %u\n",
clnt_file, clnt_line, offset, length), 0));
#else
assert(data);
#endif
assert(data);
if (!length)
{
head= bf_dupacc(data);
bf_afree(head->acc_next);
head->acc_next= NULL;
head->acc_length= 0;
return head;
}
while (data && offset>=data->acc_length)
{
offset -= data->acc_length;
data= data->acc_next;
}
assert (data);
head= bf_dupacc(data);
bf_afree(head->acc_next);
head->acc_next= NULL;
head->acc_offset += offset;
head->acc_length -= offset;
if (length >= head->acc_length)
length -= head->acc_length;
else
{
head->acc_length= length;
length= 0;
}
tail= head;
data= data->acc_next;
while (data && length && length>=data->acc_length)
{
tail->acc_next= bf_dupacc(data);
tail= tail->acc_next;
bf_afree(tail->acc_next);
tail->acc_next= NULL;
data= data->acc_next;
length -= tail->acc_length;
}
if (length)
{
#ifdef bf_cut
assert (data ||
(printf("bf_cut called from %s:%d\n",
clnt_file, clnt_line), 0));
#else
assert (data);
#endif
tail->acc_next= bf_dupacc(data);
tail= tail->acc_next;
bf_afree(tail->acc_next);
tail->acc_next= NULL;
tail->acc_length= length;
}
return head;
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_delhead (data, offset)
#else
PUBLIC acc_t *_bf_delhead (clnt_file, clnt_line, data, offset)
char *clnt_file;
int clnt_line;
#endif
register acc_t *data;
register unsigned offset;
{
acc_t *new_acc;
assert(data);
/* Find the acc we need to modify. */
new_acc= data;
while(offset >= new_acc->acc_length)
{
offset -= new_acc->acc_length;
new_acc= new_acc->acc_next;
#ifdef BUF_TRACK_ALLOC_FREE
assert(new_acc || (printf("called from %s, %d\n",
clnt_file, clnt_line),0));
#else
assert(new_acc);
#endif
}
/* Discard the old acc(s) */
if (new_acc != data)
{
new_acc->acc_linkC++;
bf_afree(data);
data= new_acc;
}
/* Make sure that acc_linkC == 1 */
if (data->acc_linkC != 1)
{
new_acc= bf_dupacc(data);
bf_afree(data);
data= new_acc;
}
/* Delete the last bit by modifying acc_offset and acc_length */
data->acc_offset += offset;
data->acc_length -= offset;
return data;
}
/*
bf_append
*/
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_append(data_first, data_second)
#else
PUBLIC acc_t *_bf_append(clnt_file, clnt_line, data_first, data_second)
char *clnt_file;
int clnt_line;
#endif
acc_t *data_first;
acc_t *data_second;
{
acc_t *head, *tail, *new_acc, *acc_ptr_new, tmp_acc, *curr;
char *src_ptr, *dst_ptr;
size_t size, offset_old, offset_new, block_size_old, block_size;
if (!data_first)
return data_second;
if (!data_second)
return data_first;
head= NULL;
tail= NULL;
while (data_first)
{
if (data_first->acc_linkC == 1)
curr= data_first;
else
{
curr= bf_dupacc(data_first);
assert (curr->acc_linkC == 1);
bf_afree(data_first);
}
data_first= curr->acc_next;
if (!curr->acc_length)
{
curr->acc_next= NULL;
bf_afree(curr);
continue;
}
if (!head)
head= curr;
else
tail->acc_next= curr;
tail= curr;
}
if (!head)
return data_second;
tail->acc_next= NULL;
while (data_second && !data_second->acc_length)
{
curr= data_second;
data_second= data_second->acc_next;
if (data_second)
data_second->acc_linkC++;
bf_afree(curr);
}
if (!data_second)
return head;
if (tail->acc_length + data_second->acc_length >
tail->acc_buffer->buf_size)
{
tail->acc_next= data_second;
return head;
}
if (tail->acc_buffer->buf_size == bf_buf_gran &&
tail->acc_buffer->buf_linkC == 1)
{
if (tail->acc_offset)
{
memmove(tail->acc_buffer->buf_data_p,
ptr2acc_data(tail), tail->acc_length);
tail->acc_offset= 0;
}
dst_ptr= ptr2acc_data(tail) + tail->acc_length;
src_ptr= ptr2acc_data(data_second);
memcpy(dst_ptr, src_ptr, data_second->acc_length);
tail->acc_length += data_second->acc_length;
tail->acc_next= data_second->acc_next;
if (data_second->acc_next)
data_second->acc_next->acc_linkC++;
bf_afree(data_second);
return head;
}
new_acc= bf_small_memreq(tail->acc_length+data_second->acc_length);
acc_ptr_new= new_acc;
offset_old= 0;
offset_new= 0;
size= tail->acc_length;
while (size)
{
assert (acc_ptr_new);
if (offset_new == acc_ptr_new->acc_length)
{
offset_new= 0;
acc_ptr_new= acc_ptr_new->acc_next;
continue;
}
assert (offset_new < acc_ptr_new->acc_length);
assert (offset_old < tail->acc_length);
block_size_old= tail->acc_length - offset_old;
block_size= acc_ptr_new->acc_length - offset_new;
if (block_size > block_size_old)
block_size= block_size_old;
memcpy(ptr2acc_data(acc_ptr_new)+offset_new,
ptr2acc_data(tail)+offset_old, block_size);
offset_new += block_size;
offset_old += block_size;
size -= block_size;
}
offset_old= 0;
size= data_second->acc_length;
while (size)
{
assert (acc_ptr_new);
if (offset_new == acc_ptr_new->acc_length)
{
offset_new= 0;
acc_ptr_new= acc_ptr_new->acc_next;
continue;
}
assert (offset_new < acc_ptr_new->acc_length);
assert (offset_old < data_second->acc_length);
block_size_old= data_second->acc_length - offset_old;
block_size= acc_ptr_new->acc_length - offset_new;
if (block_size > block_size_old)
block_size= block_size_old;
memcpy(ptr2acc_data(acc_ptr_new)+offset_new,
ptr2acc_data(data_second)+offset_old, block_size);
offset_new += block_size;
offset_old += block_size;
size -= block_size;
}
tmp_acc= *tail;
*tail= *new_acc;
*new_acc= tmp_acc;
bf_afree(new_acc);
while (tail->acc_next)
tail= tail->acc_next;
tail->acc_next= data_second->acc_next;
if (data_second->acc_next)
data_second->acc_next->acc_linkC++;
bf_afree(data_second);
return head;
}
#if BUF512_NR
PRIVATE void bf_512free(acc)
acc_t *acc;
{
#ifdef BUF_CONSISTENCY_CHECK
if (inet_buf_debug)
memset(acc->acc_buffer->buf_data_p, 0xa5, 512);
#endif
acc->acc_next= buf512_freelist;
buf512_freelist= acc;
}
#endif
#if BUF2K_NR
PRIVATE void bf_2Kfree(acc)
acc_t *acc;
{
#ifdef BUF_CONSISTENCY_CHECK
if (inet_buf_debug)
memset(acc->acc_buffer->buf_data_p, 0xa5, 2*1024);
#endif
acc->acc_next= buf2K_freelist;
buf2K_freelist= acc;
}
#endif
#if BUF32K_NR
PRIVATE void bf_32Kfree(acc)
acc_t *acc;
{
#ifdef BUF_CONSISTENCY_CHECK
if (inet_buf_debug)
memset(acc->acc_buffer->buf_data_p, 0xa5, 32*1024);
#endif
acc->acc_next= buf32K_freelist;
buf32K_freelist= acc;
}
#endif
#ifdef BUF_CONSISTENCY_CHECK
PUBLIC int bf_consistency_check()
{
acc_t *acc;
int silent;
int error;
int i;
buf_generation++;
for (i=0; i<CLIENT_NR; i++)
{
if (checkreq[i])
(*checkreq[i])();
}
/* Add information about free accessors */
for(acc= acc_freelist; acc; acc= acc->acc_next)
{
if (acc->acc_generation == buf_generation-1)
{
acc->acc_generation= buf_generation;
acc->acc_check_linkC= 0;
}
else
{
assert(acc->acc_generation == buf_generation &&
acc->acc_check_linkC > 0);
acc->acc_check_linkC= -acc->acc_check_linkC;
}
}
#if BUF512_NR
count_free_bufs(buf512_freelist);
#endif
#if BUF2K_NR
count_free_bufs(buf2K_freelist);
#endif
#if BUF32K_NR
count_free_bufs(buf32K_freelist);
#endif
error= 0;
/* Report about accessors */
silent= 0;
for (i=0, acc= accessors; i<ACC_NR; i++, acc++)
{
if (acc->acc_generation != buf_generation)
{
error++;
assert(acc->acc_generation == buf_generation-1);
acc->acc_generation= buf_generation;
if (!silent)
{
printf(
"acc[%d] (%p) has been lost with count %d, last allocated at %s, %d\n",
i, acc, acc->acc_linkC, acc->acc_alloc_file, acc->acc_alloc_line);
#if 0
silent= 1;
#endif
}
continue;
}
if (acc->acc_check_linkC == acc->acc_linkC)
continue;
error++;
if (acc->acc_check_linkC < 0)
{
if (!silent)
{
printf(
"acc[%d] is freed but still in use, allocated at %s, %d, freed at %s, %d\n",
i, acc->acc_alloc_file, acc->acc_alloc_line,
acc->acc_free_file, acc->acc_free_line);
}
acc->acc_check_linkC= -acc->acc_check_linkC;
if (acc->acc_check_linkC == acc->acc_linkC)
{
silent= 1;
continue;
}
}
if (!silent)
{
printf(
"# of tracked links (%d) for acc[%d] don't match with stored link count %d\n",
acc->acc_check_linkC, i, acc->acc_linkC);
printf("acc[%d] was allocated at %s, %d\n",
i, acc->acc_alloc_file, acc->acc_alloc_line);
silent=1;
}
}
/* Report about buffers */
#if BUF512_NR
{
for (i= 0; i<BUF512_NR; i++)
{
error |= report_buffer(&buffers512[i].buf_header,
"512-buffer", i);
}
}
#endif
#if BUF2K_NR
{
for (i= 0; i<BUF2K_NR; i++)
{
error |= report_buffer(&buffers2K[i].buf_header,
"2K-buffer", i);
}
}
#endif
#if BUF32K_NR
{
for (i= 0; i<BUF32K_NR; i++)
{
error |= report_buffer(&buffers32K[i].buf_header,
"32K-buffer", i);
}
}
#endif
return !error;
}
PRIVATE void count_free_bufs(list)
acc_t *list;
{
acc_t *acc;
buf_t *buf;
for(acc= list; acc; acc= acc->acc_next)
{
if (acc->acc_generation != buf_generation-1)
{
assert(acc->acc_generation == buf_generation &&
acc->acc_check_linkC > 0);
acc->acc_check_linkC= -acc->acc_check_linkC;
continue;
}
acc->acc_generation= buf_generation;
acc->acc_check_linkC= 0;
buf= acc->acc_buffer;
if (buf->buf_generation == buf_generation-1)
{
buf->buf_generation= buf_generation;
buf->buf_check_linkC= 0;
continue;
}
assert(buf->buf_generation == buf_generation &&
buf->buf_check_linkC > 0);
buf->buf_check_linkC= -buf->buf_check_linkC;
}
}
PRIVATE int report_buffer(buf, label, i)
buf_t *buf;
char *label;
int i;
{
if (buf->buf_generation != buf_generation)
{
assert(buf->buf_generation == buf_generation-1);
buf->buf_generation= buf_generation;
printf(
"%s[%d] (%p) has been lost with count %d, last allocated at %s, %d\n",
label, i, buf,
buf->buf_linkC, buf->buf_alloc_file,
buf->buf_alloc_line);
return 1;
}
if (buf->buf_check_linkC == buf->buf_linkC)
return 0;
if (buf->buf_check_linkC < 0)
{
printf(
"%s[%d] is freed but still in use, allocated at %s, %d, freed at %s, %d\n",
label, i, buf->buf_alloc_file, buf->buf_alloc_line,
buf->buf_free_file, buf->buf_free_line);
buf->buf_check_linkC= -buf->buf_check_linkC;
if (buf->buf_check_linkC == buf->buf_linkC)
return 1;
}
printf(
"# of tracked links (%d) for %s[%d] don't match with stored link count %d\n",
buf->buf_check_linkC, label, i, buf->buf_linkC);
printf("%s[%d] was allocated at %s, %d\n",
label, i, buf->buf_alloc_file, buf->buf_alloc_line);
return 1;
}
PUBLIC void bf_check_acc(acc)
acc_t *acc;
{
buf_t *buf;
while(acc != NULL)
{
if (acc->acc_generation == buf_generation)
{
assert(acc->acc_check_linkC > 0);
acc->acc_check_linkC++;
return;
}
assert(acc->acc_generation == buf_generation-1);
acc->acc_generation= buf_generation;
acc->acc_check_linkC= 1;
buf= acc->acc_buffer;
if (buf->buf_generation == buf_generation)
{
assert(buf->buf_check_linkC > 0);
buf->buf_check_linkC++;
}
else
{
assert(buf->buf_generation == buf_generation-1);
buf->buf_generation= buf_generation;
buf->buf_check_linkC= 1;
}
acc= acc->acc_next;
}
}
PUBLIC void _bf_mark_1acc(clnt_file, clnt_line, acc)
char *clnt_file;
int clnt_line;
acc_t *acc;
{
acc->acc_alloc_file= clnt_file;
acc->acc_alloc_line= clnt_line;
}
PUBLIC void _bf_mark_acc(clnt_file, clnt_line, acc)
char *clnt_file;
int clnt_line;
acc_t *acc;
{
buf_t *buf;
for (; acc; acc= acc->acc_next)
{
acc->acc_alloc_file= clnt_file;
acc->acc_alloc_line= clnt_line;
buf= acc->acc_buffer;
buf->buf_alloc_file= clnt_file;
buf->buf_alloc_line= clnt_line;
}
}
#endif
PUBLIC int bf_linkcheck(acc)
acc_t *acc;
{
int i;
buf_t *buffer;
for (i= 0; i<ACC_NR && acc; i++, acc= acc->acc_next)
{
if (acc->acc_linkC <= 0)
{
printf("wrong acc_linkC (%d) for acc %p\n",
acc->acc_linkC, acc);
return 0;
}
if (acc->acc_offset < 0)
{
printf("wrong acc_offset (%d) for acc %p\n",
acc->acc_offset, acc);
return 0;
}
if (acc->acc_length < 0)
{
printf("wrong acc_length (%d) for acc %p\n",
acc->acc_length, acc);
return 0;
}
buffer= acc->acc_buffer;
if (buffer == NULL)
{
printf("no buffer for acc %p\n", acc);
return 0;
}
if (buffer->buf_linkC <= 0)
{
printf(
"wrong buf_linkC (%d) for buffer %p, from acc %p\n",
buffer->buf_linkC, buffer, acc);
return 0;
}
if (acc->acc_offset + acc->acc_length > buffer->buf_size)
{
printf("%d + %d > %d for buffer %p, and acc %p\n",
acc->acc_offset, acc->acc_length,
buffer->buf_size, buffer, acc);
return 0;
}
}
if (acc != NULL)
{
printf("loop\n");
return 0;
}
return 1;
}
PRIVATE void free_accs()
{
int i, j;
DBLOCK(1, printf("free_accs\n"));
assert(bf_linkcheck(bf_linkcheck_acc));
for (i=0; !acc_freelist && i<MAX_BUFREQ_PRI; i++)
{
for (j=0; j<CLIENT_NR; j++)
{
bf_free_bufsize= 0;
if (freereq[j])
{
(*freereq[j])(i);
assert(bf_linkcheck(bf_linkcheck_acc) ||
(printf("just called %p\n",
freereq[i]),0));
}
}
}
#if DEBUG
printf("last level was level %d\n", i-1);
#endif
}
#ifndef BUF_TRACK_ALLOC_FREE
PUBLIC acc_t *bf_align(acc, size, alignment)
#else
PUBLIC acc_t *_bf_align(clnt_file, clnt_line, acc, size, alignment)
char *clnt_file;
int clnt_line;
#endif
acc_t *acc;
size_t size;
size_t alignment;
{
char *ptr;
size_t buf_size;
acc_t *head, *tail;
/* Fast check if the buffer is aligned already. */
if (acc->acc_length >= size)
{
ptr= ptr2acc_data(acc);
if (((unsigned)ptr & (alignment-1)) == 0)
return acc;
}
buf_size= bf_bufsize(acc);
#ifdef bf_align
assert((size != 0 && buf_size != 0) ||
(printf("bf_align(..., %d, %d) from %s, %d\n",
size, alignment, clnt_file, clnt_line),0));
#else
assert(size != 0 && buf_size != 0);
#endif
if (buf_size <= size)
{
acc= bf_pack(acc);
return acc;
}
head= bf_cut(acc, 0, size);
tail= bf_cut(acc, size, buf_size-size);
bf_afree(acc);
head= bf_pack(head);
assert(head->acc_next == NULL);
head->acc_next= tail;
return head;
}
#if 0
int chk_acc(acc)
acc_t *acc;
{
int acc_nr;
if (!acc)
return 1;
if (acc < accessors || acc >= &accessors[ACC_NR])
return 0;
acc_nr= acc-accessors;
return acc == &accessors[acc_nr];
}
#endif
/*
* $PchId: buf.c,v 1.19 2003/09/10 08:54:23 philip Exp $
*/