/usr/include/pike8.0/pike/block_alloc.h is in pike8.0-dev 8.0.388-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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|| This file is part of Pike. For copyright information see COPYRIGHT.
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING
|| for more information.
*/
#undef INIT_BLOCK
#undef EXIT_BLOCK
#undef BLOCK_ALLOC
#undef LOW_PTR_HASH_ALLOC
#undef PTR_HASH_ALLOC_FIXED
#undef PTR_HASH_ALLOC
#undef BLOCK_ALLOC_HSIZE_SHIFT
#undef BLOCK_ALLOC_FILL_PAGES
#undef PTR_HASH_ALLOC_FILL_PAGES
#undef PTR_HASH_ALLOC_FIXED_FILL_PAGES
#define INIT_BLOCK(X)
#define EXIT_BLOCK(X)
#define BLOCK_ALLOC_HSIZE_SHIFT 2
#ifndef PIKE_HASH_T
#define PIKE_HASH_T size_t
#endif /* !PIKE_HASH_T */
#define BA_STATIC
#define BA_INLINE
#define PTR_HASH_ALLOC_FILL_PAGES(DATA, PAGES) \
PTR_HASH_ALLOC(DATA, \
((PIKE_MALLOC_PAGE_SIZE * (PAGES)) \
- PIKE_MALLOC_OVERHEAD - BLOCK_HEADER_SIZE) / \
sizeof (struct DATA))
#define PTR_HASH_ALLOC_FIXED_FILL_PAGES(DATA, PAGES) \
PTR_HASH_ALLOC_FIXED(DATA, \
((PIKE_MALLOC_PAGE_SIZE * (PAGES)) \
- PIKE_MALLOC_OVERHEAD - BLOCK_HEADER_SIZE) / \
sizeof (struct DATA))
/* Size of the members in the block struct below that don't contain
* the payload data (i.e. that aren't x). This can be used in BSIZE to
* make the block fit within a page. */
#ifndef BLOCK_HEADER_SIZE
#define BLOCK_HEADER_SIZE (3 * sizeof (void *) + sizeof (INT32) \
DO_IF_DMALLOC( + sizeof(INT32)))
#endif
#ifndef PTR_HASH_HASHFUN_DEFINED
#define PTR_HASH_HASHFUN_DEFINED
static INLINE PIKE_HASH_T ptr_hashfun(void * ptr) {
PIKE_HASH_T q = (size_t)((char*)ptr - (char*)0);
q ^= (q >> 20) ^ (q >> 12);
return q ^ (q >> 7) ^ (q >> 4);
}
static INLINE size_t ptr_hash_find_hashsize(size_t size) {
if (size & (size-1)) {
size |= size >> 1;
size |= size >> 2;
size |= size >> 4;
size |= size >> 8;
size |= size >> 16;
#if SIZEOF_INT_TYPE > 4
size |= size >> 32;
#endif
size++;
}
return size;
}
#endif
#include "block_allocator.h"
#define LOW_PTR_HASH_ALLOC(DATA,BSIZE) \
\
static struct block_allocator PIKE_CONCAT(DATA,_allocator) = \
BA_INIT(sizeof(struct DATA), BSIZE); \
\
struct DATA *PIKE_CONCAT(alloc_,DATA)(void) { \
struct DATA * ptr = (struct DATA *)ba_alloc(&PIKE_CONCAT(DATA,_allocator));\
INIT_BLOCK(ptr); \
return ptr; \
} \
\
void PIKE_CONCAT(really_free_,DATA)(struct DATA *d) { \
EXIT_BLOCK(d); \
ba_free(&PIKE_CONCAT(DATA,_allocator), d); \
} \
\
void PIKE_CONCAT3(count_memory_in_,DATA,s)(size_t *num_, size_t *size_) { \
ba_count_all(&PIKE_CONCAT(DATA,_allocator), num_, size_); \
} \
\
struct DATA **PIKE_CONCAT(DATA,_hash_table)=0; \
size_t PIKE_CONCAT(DATA,_hash_table_size)=0; \
static size_t PIKE_CONCAT(num_,DATA)=0; \
\
static struct DATA * \
PIKE_CONCAT3(really_low_find_,DATA,_unlocked)(void *ptr, \
PIKE_HASH_T hval) \
{ \
struct DATA *p; \
p=PIKE_CONCAT(DATA,_hash_table)[hval]; \
if(!p || p->PTR_HASH_ALLOC_DATA == ptr) \
{ \
return p; \
} \
while((p=p->BLOCK_ALLOC_NEXT)) \
{ \
if(p->PTR_HASH_ALLOC_DATA==ptr) \
{ \
return p; \
} \
} \
return 0; \
} \
\
struct DATA *PIKE_CONCAT(find_,DATA)(void *ptr) \
{ \
struct DATA *p; \
PIKE_HASH_T hval = ptr_hashfun(ptr); \
if(!PIKE_CONCAT(DATA,_hash_table)) { \
return 0; \
} \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
p=PIKE_CONCAT3(really_low_find_,DATA,_unlocked)(ptr, hval); \
return p; \
} \
\
struct DATA *PIKE_CONCAT(make_,DATA)(void *ptr) \
{ \
struct DATA *p; \
PIKE_HASH_T hval = ptr_hashfun(ptr); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
p=PIKE_CONCAT3(make_,DATA,_unlocked)(ptr,hval); \
return p; \
} \
\
struct DATA *PIKE_CONCAT(get_,DATA)(void *ptr) \
{ \
struct DATA *p; \
PIKE_HASH_T hval = ptr_hashfun(ptr); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
if(!(p=PIKE_CONCAT3(really_low_find_,DATA,_unlocked)(ptr, hval))) \
p=PIKE_CONCAT3(make_,DATA,_unlocked)(ptr, hval); \
return p; \
} \
\
int PIKE_CONCAT3(check_,DATA,_semaphore)(void *ptr) \
{ \
PIKE_HASH_T hval = ptr_hashfun(ptr); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
if(PIKE_CONCAT3(really_low_find_,DATA,_unlocked)(ptr, hval)) \
{ \
return 0; \
} \
\
PIKE_CONCAT3(make_,DATA,_unlocked)(ptr, hval); \
return 1; \
} \
\
void PIKE_CONCAT(move_,DATA)(struct DATA *block, void *new_ptr) \
{ \
struct DATA **pp, *p; \
PIKE_HASH_T hval = ptr_hashfun(block->PTR_HASH_ALLOC_DATA); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
pp=PIKE_CONCAT(DATA,_hash_table) + hval; \
while((p = *pp)) \
{ \
if(p == block) \
{ \
*pp = p->BLOCK_ALLOC_NEXT; \
break; \
} \
pp = &p->BLOCK_ALLOC_NEXT; \
} \
if (!p) Pike_fatal("The block to move wasn't found.\n"); \
block->PTR_HASH_ALLOC_DATA = new_ptr; \
hval = ptr_hashfun(new_ptr) & \
((PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1); \
block->BLOCK_ALLOC_NEXT = PIKE_CONCAT(DATA,_hash_table)[hval]; \
PIKE_CONCAT(DATA,_hash_table)[hval] = block; \
} \
\
int PIKE_CONCAT(remove_,DATA)(void *ptr) \
{ \
struct DATA **pp, *p; \
PIKE_HASH_T hval = ptr_hashfun(ptr); \
if(!PIKE_CONCAT(DATA,_hash_table)) \
{ \
return 0; \
} \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
pp=PIKE_CONCAT(DATA,_hash_table) + hval; \
while((p = *pp)) \
{ \
if(p->PTR_HASH_ALLOC_DATA==ptr) \
{ \
*pp = p->BLOCK_ALLOC_NEXT; \
PIKE_CONCAT(num_,DATA)--; \
PIKE_CONCAT(really_free_,DATA)(p); \
return 1; \
} \
pp = &p->BLOCK_ALLOC_NEXT; \
} \
return 0; \
} \
\
static void PIKE_CONCAT3(low_init_,DATA,_hash)(size_t size) \
{ \
PIKE_CONCAT(DATA,_hash_table_size)= \
ptr_hash_find_hashsize(size); \
\
PIKE_CONCAT(DATA,_hash_table)=(struct DATA **) \
malloc(sizeof(struct DATA *)*PIKE_CONCAT(DATA,_hash_table_size)); \
if(!PIKE_CONCAT(DATA,_hash_table)) \
{ \
fprintf(stderr,"Fatal: out of memory.\n"); \
exit(17); \
} \
memset(PIKE_CONCAT(DATA,_hash_table),0, \
sizeof(struct DATA *)*PIKE_CONCAT(DATA,_hash_table_size)); \
} \
\
\
static void ATTRIBUTE((unused)) PIKE_CONCAT3(init_,DATA,_hash)(void) \
{ \
PIKE_CONCAT3(low_init_,DATA,_hash)(BSIZE); \
} \
\
static void PIKE_CONCAT3(exit_,DATA,_hash)(void) \
{ \
ba_free_all(& PIKE_CONCAT(DATA,_allocator)); \
free(PIKE_CONCAT(DATA,_hash_table)); \
PIKE_CONCAT(DATA,_hash_table)=0; \
PIKE_CONCAT(num_,DATA)=0; \
}
#define PTR_HASH_ALLOC_FIXED(DATA,BSIZE) \
static struct DATA *PIKE_CONCAT3(make_,DATA,_unlocked)(void *ptr, PIKE_HASH_T hval);\
LOW_PTR_HASH_ALLOC(DATA,BSIZE) \
\
static struct DATA *PIKE_CONCAT3(make_,DATA,_unlocked)(void *ptr, PIKE_HASH_T hval) \
{ \
struct DATA *p; \
\
DO_IF_DEBUG( if(!PIKE_CONCAT(DATA,_hash_table)) \
Pike_fatal("Hash table error!\n"); ) \
PIKE_CONCAT(num_,DATA)++; \
\
p=PIKE_CONCAT(alloc_,DATA)(); \
p->PTR_HASH_ALLOC_DATA=ptr; \
p->BLOCK_ALLOC_NEXT=PIKE_CONCAT(DATA,_hash_table)[hval]; \
PIKE_CONCAT(DATA,_hash_table)[hval]=p; \
return p; \
}
#define PTR_HASH_ALLOC(DATA,BSIZE) \
static struct DATA *PIKE_CONCAT3(make_,DATA,_unlocked)(void *ptr, \
PIKE_HASH_T hval); \
LOW_PTR_HASH_ALLOC(DATA,BSIZE) \
\
static void PIKE_CONCAT(DATA,_rehash)(void) \
{ \
/* Time to re-hash */ \
struct DATA **old_hash; \
struct DATA *p; \
PIKE_HASH_T hval; \
size_t e; \
\
old_hash= PIKE_CONCAT(DATA,_hash_table); \
e=PIKE_CONCAT(DATA,_hash_table_size); \
\
PIKE_CONCAT(DATA,_hash_table_size) *= 2; \
if((PIKE_CONCAT(DATA,_hash_table)=(struct DATA **) \
malloc(PIKE_CONCAT(DATA,_hash_table_size)* \
sizeof(struct DATA *)))) \
{ \
memset(PIKE_CONCAT(DATA,_hash_table),0, \
sizeof(struct DATA *)*PIKE_CONCAT(DATA,_hash_table_size)); \
while(e-- > 0) \
{ \
while((p=old_hash[e])) \
{ \
old_hash[e]=p->BLOCK_ALLOC_NEXT; \
hval = ptr_hashfun(p->PTR_HASH_ALLOC_DATA); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
p->BLOCK_ALLOC_NEXT=PIKE_CONCAT(DATA,_hash_table)[hval]; \
PIKE_CONCAT(DATA,_hash_table)[hval]=p; \
} \
} \
free((char *)old_hash); \
}else{ \
PIKE_CONCAT(DATA,_hash_table)=old_hash; \
PIKE_CONCAT(DATA,_hash_table_size)=e; \
} \
} \
\
static struct DATA *PIKE_CONCAT3(make_,DATA,_unlocked)(void *ptr, \
PIKE_HASH_T hval) \
{ \
struct DATA *p; \
\
DO_IF_DEBUG( if(!PIKE_CONCAT(DATA,_hash_table)) \
Pike_fatal("Hash table error!\n"); ) \
PIKE_CONCAT(num_,DATA)++; \
\
if(( PIKE_CONCAT(num_,DATA)>>BLOCK_ALLOC_HSIZE_SHIFT ) >= \
PIKE_CONCAT(DATA,_hash_table_size)) \
{ \
PIKE_CONCAT(DATA,_rehash)(); \
hval = ptr_hashfun(ptr); \
hval &= (PIKE_HASH_T)PIKE_CONCAT(DATA,_hash_table_size) - 1; \
} \
\
p=PIKE_CONCAT(alloc_,DATA)(); \
p->PTR_HASH_ALLOC_DATA=ptr; \
p->BLOCK_ALLOC_NEXT=PIKE_CONCAT(DATA,_hash_table)[hval]; \
PIKE_CONCAT(DATA,_hash_table)[hval]=p; \
return p; \
}
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