mirror of https://github.com/trapexit/mergerfs.git
Antonio SJ Musumeci
3 years ago
12 changed files with 1819 additions and 404 deletions
-
4libfuse/Makefile
-
20libfuse/include/fuse.h
-
356libfuse/lib/fmp.h
-
576libfuse/lib/fuse.c
-
22libfuse/lib/fuse_dirents.c
-
47libfuse/lib/fuse_lowlevel.c
-
6libfuse/lib/fuse_mt.c
-
224libfuse/lib/fuse_node.c
-
36libfuse/lib/fuse_node.h
-
627libfuse/lib/khash.h
-
92libfuse/lib/kvec.h
-
213libfuse/lib/lfmp.h
@ -0,0 +1,356 @@ |
|||||
|
/* |
||||
|
ISC License |
||||
|
|
||||
|
Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link> |
||||
|
|
||||
|
Permission to use, copy, modify, and/or distribute this software for any |
||||
|
purpose with or without fee is hereby granted, provided that the above |
||||
|
copyright notice and this permission notice appear in all copies. |
||||
|
|
||||
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
||||
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
||||
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
||||
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
||||
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
||||
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
||||
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
||||
|
*/ |
||||
|
|
||||
|
#pragma once |
||||
|
|
||||
|
#include "kvec.h" |
||||
|
|
||||
|
#include <errno.h> |
||||
|
#include <stdint.h> |
||||
|
#include <stdlib.h> |
||||
|
#include <string.h> |
||||
|
#include <sys/mman.h> |
||||
|
#include <unistd.h> |
||||
|
|
||||
|
#define ROUND_UP(N,S) ((((N) + (S) - 1) / (S)) * (S)) |
||||
|
|
||||
|
typedef kvec_t(void*) slab_kvec_t; |
||||
|
|
||||
|
typedef struct mem_stack_t mem_stack_t; |
||||
|
struct mem_stack_t |
||||
|
{ |
||||
|
mem_stack_t *next; |
||||
|
}; |
||||
|
|
||||
|
typedef struct fmp_t fmp_t; |
||||
|
struct fmp_t |
||||
|
{ |
||||
|
mem_stack_t *objs; |
||||
|
slab_kvec_t slabs; |
||||
|
uint64_t avail_objs; |
||||
|
uint64_t obj_size; |
||||
|
uint64_t page_size; |
||||
|
uint64_t slab_size; |
||||
|
}; |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
fmp_page_size() |
||||
|
{ |
||||
|
return sysconf(_SC_PAGESIZE); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_init(fmp_t *fmp_, |
||||
|
const uint64_t obj_size_, |
||||
|
const uint64_t page_multiple_) |
||||
|
{ |
||||
|
kv_init(fmp_->slabs); |
||||
|
fmp_->objs = NULL; |
||||
|
fmp_->avail_objs = 0; |
||||
|
fmp_->obj_size = ROUND_UP(obj_size_,sizeof(void*)); |
||||
|
fmp_->page_size = fmp_page_size(); |
||||
|
fmp_->slab_size = (fmp_->page_size * page_multiple_); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
fmp_slab_count(fmp_t *fmp_) |
||||
|
{ |
||||
|
return kv_size(fmp_->slabs); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
fmp_slab_alloc_posix_memalign(fmp_t *fmp_) |
||||
|
{ |
||||
|
int rv; |
||||
|
void *mem; |
||||
|
const size_t alignment = fmp_->page_size; |
||||
|
const size_t size = fmp_->slab_size; |
||||
|
|
||||
|
rv = posix_memalign(&mem,alignment,size); |
||||
|
if(rv != 0) |
||||
|
return NULL; |
||||
|
|
||||
|
return NULL; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
fmp_slab_alloc_mmap(fmp_t *fmp_) |
||||
|
{ |
||||
|
void *mem; |
||||
|
void *address = NULL; |
||||
|
const size_t length = fmp_->slab_size; |
||||
|
const int protect = PROT_READ|PROT_WRITE; |
||||
|
const int flags = MAP_PRIVATE|MAP_ANONYMOUS; |
||||
|
const int filedes = -1; |
||||
|
const off_t offset = 0; |
||||
|
|
||||
|
mem = mmap(address,length,protect,flags,filedes,offset); |
||||
|
if(mem == MAP_FAILED) |
||||
|
return NULL; |
||||
|
|
||||
|
return mem; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_slab_free_posix_memalign(fmp_t* fmp_, |
||||
|
void *mem_) |
||||
|
{ |
||||
|
(void)fmp_; |
||||
|
free(mem_); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_slab_free_mmap(fmp_t* fmp_, |
||||
|
void *mem_) |
||||
|
{ |
||||
|
void *addr = mem_; |
||||
|
size_t length = fmp_->slab_size; |
||||
|
|
||||
|
(void)munmap(addr,length); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
int |
||||
|
fmp_slab_alloc(fmp_t *fmp_) |
||||
|
{ |
||||
|
char *i; |
||||
|
void *mem; |
||||
|
|
||||
|
mem = fmp_slab_alloc_mmap(fmp_); |
||||
|
if(mem == NULL) |
||||
|
return -ENOMEM; |
||||
|
|
||||
|
kv_push(void*,fmp_->slabs,mem); |
||||
|
|
||||
|
i = ((char*)mem + fmp_->slab_size - fmp_->obj_size); |
||||
|
while(i >= (char*)mem) |
||||
|
{ |
||||
|
mem_stack_t *obj = (mem_stack_t*)i; |
||||
|
|
||||
|
obj->next = fmp_->objs; |
||||
|
fmp_->objs = obj; |
||||
|
fmp_->avail_objs++; |
||||
|
|
||||
|
i -= fmp_->obj_size; |
||||
|
} |
||||
|
|
||||
|
return 0; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
fmp_alloc(fmp_t *fmp_) |
||||
|
{ |
||||
|
void *rv; |
||||
|
|
||||
|
if(fmp_->objs == NULL) |
||||
|
fmp_slab_alloc(fmp_); |
||||
|
if(fmp_->objs == NULL) |
||||
|
return NULL; |
||||
|
|
||||
|
rv = fmp_->objs; |
||||
|
|
||||
|
fmp_->objs = fmp_->objs->next; |
||||
|
fmp_->avail_objs--; |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
fmp_calloc(fmp_t *fmp_) |
||||
|
{ |
||||
|
void *obj; |
||||
|
|
||||
|
obj = fmp_alloc(fmp_); |
||||
|
if(obj == NULL) |
||||
|
return NULL; |
||||
|
|
||||
|
memset(obj,0,fmp_->obj_size); |
||||
|
|
||||
|
return obj; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_free(fmp_t *fmp_, |
||||
|
void *obj_) |
||||
|
{ |
||||
|
mem_stack_t *obj = (mem_stack_t*)obj_; |
||||
|
|
||||
|
obj->next = fmp_->objs; |
||||
|
fmp_->objs = obj; |
||||
|
fmp_->avail_objs++; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_clear(fmp_t *fmp_) |
||||
|
{ |
||||
|
while(kv_size(fmp_->slabs)) |
||||
|
{ |
||||
|
void *slab = kv_pop(fmp_->slabs); |
||||
|
|
||||
|
fmp_slab_free_mmap(fmp_,slab); |
||||
|
} |
||||
|
|
||||
|
fmp_->objs = NULL; |
||||
|
fmp_->avail_objs = 0; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_destroy(fmp_t *fmp_) |
||||
|
{ |
||||
|
fmp_clear(fmp_); |
||||
|
kv_destroy(fmp_->slabs); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
fmp_avail_objs(fmp_t *fmp_) |
||||
|
{ |
||||
|
return fmp_->avail_objs; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
fmp_objs_in_slab(fmp_t *fmp_, |
||||
|
void *slab_) |
||||
|
{ |
||||
|
char *slab; |
||||
|
uint64_t objs_in_slab; |
||||
|
|
||||
|
objs_in_slab = 0; |
||||
|
slab = (char*)slab_; |
||||
|
for(mem_stack_t *stack = fmp_->objs; stack != NULL; stack = stack->next) |
||||
|
{ |
||||
|
char *obj = (char*)stack; |
||||
|
if((obj >= slab) && (obj < (slab + fmp_->slab_size))) |
||||
|
objs_in_slab++; |
||||
|
} |
||||
|
|
||||
|
return objs_in_slab; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fmp_remove_objs_in_slab(fmp_t *fmp_, |
||||
|
void *slab_) |
||||
|
{ |
||||
|
char *slab = (char*)slab_; |
||||
|
mem_stack_t **p = &fmp_->objs; |
||||
|
|
||||
|
while((*p) != NULL) |
||||
|
{ |
||||
|
char *obj = (char*)*p; |
||||
|
|
||||
|
if((obj >= slab) && (obj < (slab + fmp_->slab_size))) |
||||
|
{ |
||||
|
*p = (*p)->next; |
||||
|
fmp_->avail_objs--; |
||||
|
continue; |
||||
|
} |
||||
|
|
||||
|
p = &(*p)->next; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
int |
||||
|
fmp_gc(fmp_t *fmp_) |
||||
|
{ |
||||
|
int i; |
||||
|
int freed_slabs; |
||||
|
uint64_t objs_per_slab; |
||||
|
|
||||
|
objs_per_slab = (fmp_->slab_size / fmp_->obj_size); |
||||
|
|
||||
|
i = 0; |
||||
|
freed_slabs = 0; |
||||
|
while(i < kv_size(fmp_->slabs)) |
||||
|
{ |
||||
|
char *slab; |
||||
|
uint64_t objs_in_slab; |
||||
|
|
||||
|
slab = kv_A(fmp_->slabs,i); |
||||
|
|
||||
|
objs_in_slab = fmp_objs_in_slab(fmp_,slab); |
||||
|
if(objs_in_slab != objs_per_slab) |
||||
|
{ |
||||
|
i++; |
||||
|
continue; |
||||
|
} |
||||
|
|
||||
|
fmp_remove_objs_in_slab(fmp_,slab); |
||||
|
|
||||
|
kv_delete(fmp_->slabs,i); |
||||
|
|
||||
|
fmp_slab_free_mmap(fmp_,slab); |
||||
|
freed_slabs++; |
||||
|
} |
||||
|
|
||||
|
return freed_slabs; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
fmp_objs_per_slab(fmp_t *fmp_) |
||||
|
{ |
||||
|
return (fmp_->slab_size / fmp_->obj_size); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
double |
||||
|
fmp_slab_usage_ratio(fmp_t *fmp_) |
||||
|
{ |
||||
|
double rv; |
||||
|
uint64_t objs_per_slab; |
||||
|
|
||||
|
objs_per_slab = fmp_objs_per_slab(fmp_); |
||||
|
|
||||
|
rv = ((double)fmp_->avail_objs / (double)objs_per_slab); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
@ -0,0 +1,224 @@ |
|||||
|
#include "fuse_node.h" |
||||
|
|
||||
|
#include "khash.h" |
||||
|
|
||||
|
#include <stdlib.h> |
||||
|
#include <string.h> |
||||
|
#include <time.h> |
||||
|
|
||||
|
#include <stdio.h> // for debugging |
||||
|
|
||||
|
#define UNKNOWN_INO UINT64_MAX |
||||
|
#define ROOT_NODE_ID 0 |
||||
|
#define ROOT_NODE_NAME "/" |
||||
|
|
||||
|
typedef struct node_idname_t node_idname_t; |
||||
|
struct node_idname_t |
||||
|
{ |
||||
|
uint64_t id; |
||||
|
const char *name; |
||||
|
}; |
||||
|
|
||||
|
static khint_t idname_hash_func(const node_idname_t idname); |
||||
|
static int idname_hash_equal(const node_idname_t idname0, const node_idname_t idname1); |
||||
|
|
||||
|
KHASH_INIT(node,node_idname_t,fuse_node_t*,1,idname_hash_func,idname_hash_equal); |
||||
|
|
||||
|
typedef struct fuse_node_hashtable_t fuse_node_hashtable_t; |
||||
|
struct fuse_node_hashtable_t |
||||
|
{ |
||||
|
kh_node_t *ht; |
||||
|
uint64_t id; |
||||
|
uint64_t generation; |
||||
|
}; |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
khint_t |
||||
|
idname_hash_func(const node_idname_t idname_) |
||||
|
{ |
||||
|
if(idname_.name == NULL) |
||||
|
return idname_.id; |
||||
|
return (idname_.id ^ kh_str_hash_func(idname_.name)); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
int |
||||
|
idname_hash_equal(const node_idname_t idname0_, |
||||
|
const node_idname_t idname1_) |
||||
|
{ |
||||
|
return ((idname0_.id == idname1_.id) && |
||||
|
((idname0_.name == idname1_.name) || |
||||
|
(strcmp(idname0_.name,idname1_.name) == 0))); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
fuse_node_t* |
||||
|
fuse_node_alloc(const uint64_t id_, |
||||
|
const char *name_) |
||||
|
{ |
||||
|
fuse_node_t *node; |
||||
|
|
||||
|
node = (fuse_node_t*)calloc(1,sizeof(fuse_node_t)); |
||||
|
|
||||
|
node->id = id_; |
||||
|
node->name = strdup(name_); |
||||
|
node->ref_count = 1; |
||||
|
node->lookup_count = 1; |
||||
|
|
||||
|
return node; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
fuse_node_free(fuse_node_t *node_) |
||||
|
{ |
||||
|
free(node_->name); |
||||
|
free(node_); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
rand64() |
||||
|
{ |
||||
|
uint64_t rv; |
||||
|
|
||||
|
rv = rand(); |
||||
|
rv <<= 32; |
||||
|
rv |= rand(); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
node_hashtable_gen_unique_id(fuse_node_hashtable_t *ht_) |
||||
|
{ |
||||
|
do |
||||
|
{ |
||||
|
ht_->id++; |
||||
|
if(ht_->id == 0) |
||||
|
ht_->generation++; |
||||
|
} |
||||
|
while((ht_->id == 0) || (ht_->id == UNKNOWN_INO)); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
node_hashtable_put_root(fuse_node_hashtable_t *ht_) |
||||
|
{ |
||||
|
int rv; |
||||
|
khint_t k; |
||||
|
fuse_node_t *root_node; |
||||
|
const node_idname_t idname0 = {ROOT_NODE_ID,""}; |
||||
|
const node_idname_t idname1 = {ROOT_NODE_ID,ROOT_NODE_NAME}; |
||||
|
|
||||
|
root_node = fuse_node_alloc(ROOT_NODE_ID,ROOT_NODE_NAME); |
||||
|
|
||||
|
k = kh_put_node(ht_->ht,idname0,&rv); |
||||
|
kh_value(ht_->ht,k) = root_node; |
||||
|
|
||||
|
k = kh_put_node(ht_->ht,idname1,&rv); |
||||
|
kh_value(ht_->ht,k) = root_node; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
node_hashtable_set_id_gen(fuse_node_hashtable_t *ht_, |
||||
|
fuse_node_t *node_) |
||||
|
{ |
||||
|
node_hashtable_gen_unique_id(ht_); |
||||
|
node_->id = ht_->id; |
||||
|
node_->generation = ht_->generation; |
||||
|
} |
||||
|
|
||||
|
fuse_node_hashtable_t* |
||||
|
fuse_node_hashtable_init() |
||||
|
{ |
||||
|
fuse_node_hashtable_t *ht; |
||||
|
|
||||
|
ht = (fuse_node_hashtable_t*)calloc(sizeof(fuse_node_hashtable_t),1); |
||||
|
if(ht == NULL) |
||||
|
return NULL; |
||||
|
|
||||
|
ht->ht = kh_init_node(); |
||||
|
if(ht->ht == NULL) |
||||
|
{ |
||||
|
free(ht); |
||||
|
return NULL; |
||||
|
} |
||||
|
|
||||
|
srand(time(NULL)); |
||||
|
ht->id = 0; |
||||
|
ht->generation = rand64(); |
||||
|
|
||||
|
node_hashtable_put_root(ht); |
||||
|
|
||||
|
return ht; |
||||
|
} |
||||
|
|
||||
|
fuse_node_t* |
||||
|
fuse_node_hashtable_put(fuse_node_hashtable_t *ht_, |
||||
|
const uint64_t parent_id_, |
||||
|
const uint64_t child_id_, |
||||
|
const char *child_name_) |
||||
|
{ |
||||
|
int rv; |
||||
|
khint_t k; |
||||
|
fuse_node_t *child_node; |
||||
|
const node_idname_t p_idname = {parent_id_,""}; |
||||
|
const node_idname_t c0_idname = {child_id_,child_name_}; |
||||
|
const node_idname_t c1_idname = {parent_id_,child_name_}; |
||||
|
|
||||
|
child_node = fuse_node_alloc(child_id_,child_name_); |
||||
|
|
||||
|
k = kh_get_node(ht_->ht,p_idname); |
||||
|
child_node->parent = kh_value(ht_->ht,k); |
||||
|
child_node->parent->ref_count++; |
||||
|
|
||||
|
k = kh_put_node(ht_->ht,c0_idname,&rv); |
||||
|
kh_value(ht_->ht,k) = child_node; |
||||
|
|
||||
|
k = kh_put_node(ht_->ht,c1_idname,&rv); |
||||
|
kh_value(ht_->ht,k) = child_node; |
||||
|
|
||||
|
return child_node; |
||||
|
} |
||||
|
|
||||
|
fuse_node_t* |
||||
|
fuse_node_hashtable_get(fuse_node_hashtable_t *ht_, |
||||
|
const uint64_t id_) |
||||
|
{ |
||||
|
return fuse_node_hashtable_get_child(ht_,id_,""); |
||||
|
} |
||||
|
|
||||
|
fuse_node_t* |
||||
|
fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht_, |
||||
|
const uint64_t parent_id_, |
||||
|
const char *child_name_) |
||||
|
{ |
||||
|
khint_t k; |
||||
|
fuse_node_t *node; |
||||
|
const node_idname_t idname = {parent_id_,child_name_}; |
||||
|
|
||||
|
k = kh_get_node(ht_->ht,idname); |
||||
|
node = ((k != kh_end(ht_->ht)) ? |
||||
|
kh_value(ht_->ht,k) : |
||||
|
NULL); |
||||
|
|
||||
|
return node; |
||||
|
} |
||||
|
|
||||
|
void |
||||
|
fuse_node_hashtable_del(fuse_node_hashtable_t *ht_, |
||||
|
fuse_node_t *node_) |
||||
|
{ |
||||
|
|
||||
|
} |
||||
@ -0,0 +1,36 @@ |
|||||
|
#include <stdint.h> |
||||
|
|
||||
|
typedef struct fuse_node_t fuse_node_t; |
||||
|
struct fuse_node_t |
||||
|
{ |
||||
|
uint64_t id; |
||||
|
uint64_t generation; |
||||
|
char *name; |
||||
|
fuse_node_t *parent; |
||||
|
uint32_t ref_count; |
||||
|
uint64_t lookup_count; |
||||
|
uint64_t open_count; |
||||
|
}; |
||||
|
|
||||
|
struct fuse_node_hashtable_t; |
||||
|
typedef struct fuse_node_hashtable_t fuse_node_hashtable_t; |
||||
|
|
||||
|
|
||||
|
fuse_node_hashtable_t *fuse_node_hashtable_init(); |
||||
|
|
||||
|
fuse_node_t *fuse_node_hashtable_put(fuse_node_hashtable_t *ht, |
||||
|
const uint64_t parent_id, |
||||
|
const uint64_t child_id, |
||||
|
const char *child_name); |
||||
|
|
||||
|
fuse_node_t* fuse_node_hashtable_get(fuse_node_hashtable_t *ht, |
||||
|
const uint64_t id); |
||||
|
fuse_node_t* fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht, |
||||
|
const uint64_t id, |
||||
|
const char *name); |
||||
|
void fuse_node_hashtable_del(fuse_node_hashtable_t *ht, |
||||
|
fuse_node_t *node); |
||||
|
|
||||
|
void fuse_node_hashtable_get_path(fuse_node_hashtable_t *ht, |
||||
|
char *buf, |
||||
|
uint32_t buflen); |
||||
@ -0,0 +1,627 @@ |
|||||
|
/* The MIT License |
||||
|
|
||||
|
Copyright (c) 2008, 2009, 2011 by Attractive Chaos <attractor@live.co.uk> |
||||
|
|
||||
|
Permission is hereby granted, free of charge, to any person obtaining |
||||
|
a copy of this software and associated documentation files (the |
||||
|
"Software"), to deal in the Software without restriction, including |
||||
|
without limitation the rights to use, copy, modify, merge, publish, |
||||
|
distribute, sublicense, and/or sell copies of the Software, and to |
||||
|
permit persons to whom the Software is furnished to do so, subject to |
||||
|
the following conditions: |
||||
|
|
||||
|
The above copyright notice and this permission notice shall be |
||||
|
included in all copies or substantial portions of the Software. |
||||
|
|
||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
||||
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
||||
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
||||
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
||||
|
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
||||
|
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||||
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
||||
|
SOFTWARE. |
||||
|
*/ |
||||
|
|
||||
|
/* |
||||
|
An example: |
||||
|
|
||||
|
#include "khash.h" |
||||
|
KHASH_MAP_INIT_INT(32, char) |
||||
|
int main() { |
||||
|
int ret, is_missing; |
||||
|
khiter_t k; |
||||
|
khash_t(32) *h = kh_init(32); |
||||
|
k = kh_put(32, h, 5, &ret); |
||||
|
kh_value(h, k) = 10; |
||||
|
k = kh_get(32, h, 10); |
||||
|
is_missing = (k == kh_end(h)); |
||||
|
k = kh_get(32, h, 5); |
||||
|
kh_del(32, h, k); |
||||
|
for (k = kh_begin(h); k != kh_end(h); ++k) |
||||
|
if (kh_exist(h, k)) kh_value(h, k) = 1; |
||||
|
kh_destroy(32, h); |
||||
|
return 0; |
||||
|
} |
||||
|
*/ |
||||
|
|
||||
|
/* |
||||
|
2013-05-02 (0.2.8): |
||||
|
|
||||
|
* Use quadratic probing. When the capacity is power of 2, stepping function |
||||
|
i*(i+1)/2 guarantees to traverse each bucket. It is better than double |
||||
|
hashing on cache performance and is more robust than linear probing. |
||||
|
|
||||
|
In theory, double hashing should be more robust than quadratic probing. |
||||
|
However, my implementation is probably not for large hash tables, because |
||||
|
the second hash function is closely tied to the first hash function, |
||||
|
which reduce the effectiveness of double hashing. |
||||
|
|
||||
|
Reference: http://research.cs.vt.edu/AVresearch/hashing/quadratic.php |
||||
|
|
||||
|
2011-12-29 (0.2.7): |
||||
|
|
||||
|
* Minor code clean up; no actual effect. |
||||
|
|
||||
|
2011-09-16 (0.2.6): |
||||
|
|
||||
|
* The capacity is a power of 2. This seems to dramatically improve the |
||||
|
speed for simple keys. Thank Zilong Tan for the suggestion. Reference: |
||||
|
|
||||
|
- http://code.google.com/p/ulib/ |
||||
|
- http://nothings.org/computer/judy/ |
||||
|
|
||||
|
* Allow to optionally use linear probing which usually has better |
||||
|
performance for random input. Double hashing is still the default as it |
||||
|
is more robust to certain non-random input. |
||||
|
|
||||
|
* Added Wang's integer hash function (not used by default). This hash |
||||
|
function is more robust to certain non-random input. |
||||
|
|
||||
|
2011-02-14 (0.2.5): |
||||
|
|
||||
|
* Allow to declare global functions. |
||||
|
|
||||
|
2009-09-26 (0.2.4): |
||||
|
|
||||
|
* Improve portability |
||||
|
|
||||
|
2008-09-19 (0.2.3): |
||||
|
|
||||
|
* Corrected the example |
||||
|
* Improved interfaces |
||||
|
|
||||
|
2008-09-11 (0.2.2): |
||||
|
|
||||
|
* Improved speed a little in kh_put() |
||||
|
|
||||
|
2008-09-10 (0.2.1): |
||||
|
|
||||
|
* Added kh_clear() |
||||
|
* Fixed a compiling error |
||||
|
|
||||
|
2008-09-02 (0.2.0): |
||||
|
|
||||
|
* Changed to token concatenation which increases flexibility. |
||||
|
|
||||
|
2008-08-31 (0.1.2): |
||||
|
|
||||
|
* Fixed a bug in kh_get(), which has not been tested previously. |
||||
|
|
||||
|
2008-08-31 (0.1.1): |
||||
|
|
||||
|
* Added destructor |
||||
|
*/ |
||||
|
|
||||
|
|
||||
|
#ifndef __AC_KHASH_H |
||||
|
#define __AC_KHASH_H |
||||
|
|
||||
|
/*! |
||||
|
@header |
||||
|
|
||||
|
Generic hash table library. |
||||
|
*/ |
||||
|
|
||||
|
#define AC_VERSION_KHASH_H "0.2.8" |
||||
|
|
||||
|
#include <stdlib.h> |
||||
|
#include <string.h> |
||||
|
#include <limits.h> |
||||
|
|
||||
|
/* compiler specific configuration */ |
||||
|
|
||||
|
#if UINT_MAX == 0xffffffffu |
||||
|
typedef unsigned int khint32_t; |
||||
|
#elif ULONG_MAX == 0xffffffffu |
||||
|
typedef unsigned long khint32_t; |
||||
|
#endif |
||||
|
|
||||
|
#if ULONG_MAX == ULLONG_MAX |
||||
|
typedef unsigned long khint64_t; |
||||
|
#else |
||||
|
typedef unsigned long long khint64_t; |
||||
|
#endif |
||||
|
|
||||
|
#ifndef kh_inline |
||||
|
#ifdef _MSC_VER |
||||
|
#define kh_inline __inline |
||||
|
#else |
||||
|
#define kh_inline inline |
||||
|
#endif |
||||
|
#endif /* kh_inline */ |
||||
|
|
||||
|
#ifndef klib_unused |
||||
|
#if (defined __clang__ && __clang_major__ >= 3) || (defined __GNUC__ && __GNUC__ >= 3) |
||||
|
#define klib_unused __attribute__ ((__unused__)) |
||||
|
#else |
||||
|
#define klib_unused |
||||
|
#endif |
||||
|
#endif /* klib_unused */ |
||||
|
|
||||
|
typedef khint32_t khint_t; |
||||
|
typedef khint_t khiter_t; |
||||
|
|
||||
|
#define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2) |
||||
|
#define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&1) |
||||
|
#define __ac_iseither(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&3) |
||||
|
#define __ac_set_isdel_false(flag, i) (flag[i>>4]&=~(1ul<<((i&0xfU)<<1))) |
||||
|
#define __ac_set_isempty_false(flag, i) (flag[i>>4]&=~(2ul<<((i&0xfU)<<1))) |
||||
|
#define __ac_set_isboth_false(flag, i) (flag[i>>4]&=~(3ul<<((i&0xfU)<<1))) |
||||
|
#define __ac_set_isdel_true(flag, i) (flag[i>>4]|=1ul<<((i&0xfU)<<1)) |
||||
|
|
||||
|
#define __ac_fsize(m) ((m) < 16? 1 : (m)>>4) |
||||
|
|
||||
|
#ifndef kroundup32 |
||||
|
#define kroundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x)) |
||||
|
#endif |
||||
|
|
||||
|
#ifndef kcalloc |
||||
|
#define kcalloc(N,Z) calloc(N,Z) |
||||
|
#endif |
||||
|
#ifndef kmalloc |
||||
|
#define kmalloc(Z) malloc(Z) |
||||
|
#endif |
||||
|
#ifndef krealloc |
||||
|
#define krealloc(P,Z) realloc(P,Z) |
||||
|
#endif |
||||
|
#ifndef kfree |
||||
|
#define kfree(P) free(P) |
||||
|
#endif |
||||
|
|
||||
|
static const double __ac_HASH_UPPER = 0.77; |
||||
|
|
||||
|
#define __KHASH_TYPE(name, khkey_t, khval_t) \ |
||||
|
typedef struct kh_##name##_s { \ |
||||
|
khint_t n_buckets, size, n_occupied, upper_bound; \ |
||||
|
khint32_t *flags; \ |
||||
|
khkey_t *keys; \ |
||||
|
khval_t *vals; \ |
||||
|
} kh_##name##_t; |
||||
|
|
||||
|
#define __KHASH_PROTOTYPES(name, khkey_t, khval_t) \ |
||||
|
extern kh_##name##_t *kh_init_##name(void); \ |
||||
|
extern void kh_destroy_##name(kh_##name##_t *h); \ |
||||
|
extern void kh_clear_##name(kh_##name##_t *h); \ |
||||
|
extern khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key); \ |
||||
|
extern int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets); \ |
||||
|
extern khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret); \ |
||||
|
extern void kh_del_##name(kh_##name##_t *h, khint_t x); |
||||
|
|
||||
|
#define __KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \ |
||||
|
SCOPE kh_##name##_t *kh_init_##name(void) { \ |
||||
|
return (kh_##name##_t*)kcalloc(1, sizeof(kh_##name##_t)); \ |
||||
|
} \ |
||||
|
SCOPE void kh_destroy_##name(kh_##name##_t *h) \ |
||||
|
{ \ |
||||
|
if (h) { \ |
||||
|
kfree((void *)h->keys); kfree(h->flags); \ |
||||
|
kfree((void *)h->vals); \ |
||||
|
kfree(h); \ |
||||
|
} \ |
||||
|
} \ |
||||
|
SCOPE void kh_clear_##name(kh_##name##_t *h) \ |
||||
|
{ \ |
||||
|
if (h && h->flags) { \ |
||||
|
memset(h->flags, 0xaa, __ac_fsize(h->n_buckets) * sizeof(khint32_t)); \ |
||||
|
h->size = h->n_occupied = 0; \ |
||||
|
} \ |
||||
|
} \ |
||||
|
SCOPE khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key) \ |
||||
|
{ \ |
||||
|
if (h->n_buckets) { \ |
||||
|
khint_t k, i, last, mask, step = 0; \ |
||||
|
mask = h->n_buckets - 1; \ |
||||
|
k = __hash_func(key); i = k & mask; \ |
||||
|
last = i; \ |
||||
|
while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \ |
||||
|
i = (i + (++step)) & mask; \ |
||||
|
if (i == last) return h->n_buckets; \ |
||||
|
} \ |
||||
|
return __ac_iseither(h->flags, i)? h->n_buckets : i; \ |
||||
|
} else return 0; \ |
||||
|
} \ |
||||
|
SCOPE int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets) \ |
||||
|
{ /* This function uses 0.25*n_buckets bytes of working space instead of [sizeof(key_t+val_t)+.25]*n_buckets. */ \ |
||||
|
khint32_t *new_flags = 0; \ |
||||
|
khint_t j = 1; \ |
||||
|
{ \ |
||||
|
kroundup32(new_n_buckets); \ |
||||
|
if (new_n_buckets < 4) new_n_buckets = 4; \ |
||||
|
if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0; /* requested size is too small */ \ |
||||
|
else { /* hash table size to be changed (shrink or expand); rehash */ \ |
||||
|
new_flags = (khint32_t*)kmalloc(__ac_fsize(new_n_buckets) * sizeof(khint32_t)); \ |
||||
|
if (!new_flags) return -1; \ |
||||
|
memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \ |
||||
|
if (h->n_buckets < new_n_buckets) { /* expand */ \ |
||||
|
khkey_t *new_keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \ |
||||
|
if (!new_keys) { kfree(new_flags); return -1; } \ |
||||
|
h->keys = new_keys; \ |
||||
|
if (kh_is_map) { \ |
||||
|
khval_t *new_vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \ |
||||
|
if (!new_vals) { kfree(new_flags); return -1; } \ |
||||
|
h->vals = new_vals; \ |
||||
|
} \ |
||||
|
} /* otherwise shrink */ \ |
||||
|
} \ |
||||
|
} \ |
||||
|
if (j) { /* rehashing is needed */ \ |
||||
|
for (j = 0; j != h->n_buckets; ++j) { \ |
||||
|
if (__ac_iseither(h->flags, j) == 0) { \ |
||||
|
khkey_t key = h->keys[j]; \ |
||||
|
khval_t val; \ |
||||
|
khint_t new_mask; \ |
||||
|
new_mask = new_n_buckets - 1; \ |
||||
|
if (kh_is_map) val = h->vals[j]; \ |
||||
|
__ac_set_isdel_true(h->flags, j); \ |
||||
|
while (1) { /* kick-out process; sort of like in Cuckoo hashing */ \ |
||||
|
khint_t k, i, step = 0; \ |
||||
|
k = __hash_func(key); \ |
||||
|
i = k & new_mask; \ |
||||
|
while (!__ac_isempty(new_flags, i)) i = (i + (++step)) & new_mask; \ |
||||
|
__ac_set_isempty_false(new_flags, i); \ |
||||
|
if (i < h->n_buckets && __ac_iseither(h->flags, i) == 0) { /* kick out the existing element */ \ |
||||
|
{ khkey_t tmp = h->keys[i]; h->keys[i] = key; key = tmp; } \ |
||||
|
if (kh_is_map) { khval_t tmp = h->vals[i]; h->vals[i] = val; val = tmp; } \ |
||||
|
__ac_set_isdel_true(h->flags, i); /* mark it as deleted in the old hash table */ \ |
||||
|
} else { /* write the element and jump out of the loop */ \ |
||||
|
h->keys[i] = key; \ |
||||
|
if (kh_is_map) h->vals[i] = val; \ |
||||
|
break; \ |
||||
|
} \ |
||||
|
} \ |
||||
|
} \ |
||||
|
} \ |
||||
|
if (h->n_buckets > new_n_buckets) { /* shrink the hash table */ \ |
||||
|
h->keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \ |
||||
|
if (kh_is_map) h->vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \ |
||||
|
} \ |
||||
|
kfree(h->flags); /* free the working space */ \ |
||||
|
h->flags = new_flags; \ |
||||
|
h->n_buckets = new_n_buckets; \ |
||||
|
h->n_occupied = h->size; \ |
||||
|
h->upper_bound = (khint_t)(h->n_buckets * __ac_HASH_UPPER + 0.5); \ |
||||
|
} \ |
||||
|
return 0; \ |
||||
|
} \ |
||||
|
SCOPE khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret) \ |
||||
|
{ \ |
||||
|
khint_t x; \ |
||||
|
if (h->n_occupied >= h->upper_bound) { /* update the hash table */ \ |
||||
|
if (h->n_buckets > (h->size<<1)) { \ |
||||
|
if (kh_resize_##name(h, h->n_buckets - 1) < 0) { /* clear "deleted" elements */ \ |
||||
|
*ret = -1; return h->n_buckets; \ |
||||
|
} \ |
||||
|
} else if (kh_resize_##name(h, h->n_buckets + 1) < 0) { /* expand the hash table */ \ |
||||
|
*ret = -1; return h->n_buckets; \ |
||||
|
} \ |
||||
|
} /* TODO: to implement automatically shrinking; resize() already support shrinking */ \ |
||||
|
{ \ |
||||
|
khint_t k, i, site, last, mask = h->n_buckets - 1, step = 0; \ |
||||
|
x = site = h->n_buckets; k = __hash_func(key); i = k & mask; \ |
||||
|
if (__ac_isempty(h->flags, i)) x = i; /* for speed up */ \ |
||||
|
else { \ |
||||
|
last = i; \ |
||||
|
while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \ |
||||
|
if (__ac_isdel(h->flags, i)) site = i; \ |
||||
|
i = (i + (++step)) & mask; \ |
||||
|
if (i == last) { x = site; break; } \ |
||||
|
} \ |
||||
|
if (x == h->n_buckets) { \ |
||||
|
if (__ac_isempty(h->flags, i) && site != h->n_buckets) x = site; \ |
||||
|
else x = i; \ |
||||
|
} \ |
||||
|
} \ |
||||
|
} \ |
||||
|
if (__ac_isempty(h->flags, x)) { /* not present at all */ \ |
||||
|
h->keys[x] = key; \ |
||||
|
__ac_set_isboth_false(h->flags, x); \ |
||||
|
++h->size; ++h->n_occupied; \ |
||||
|
*ret = 1; \ |
||||
|
} else if (__ac_isdel(h->flags, x)) { /* deleted */ \ |
||||
|
h->keys[x] = key; \ |
||||
|
__ac_set_isboth_false(h->flags, x); \ |
||||
|
++h->size; \ |
||||
|
*ret = 2; \ |
||||
|
} else *ret = 0; /* Don't touch h->keys[x] if present and not deleted */ \ |
||||
|
return x; \ |
||||
|
} \ |
||||
|
SCOPE void kh_del_##name(kh_##name##_t *h, khint_t x) \ |
||||
|
{ \ |
||||
|
if (x != h->n_buckets && !__ac_iseither(h->flags, x)) { \ |
||||
|
__ac_set_isdel_true(h->flags, x); \ |
||||
|
--h->size; \ |
||||
|
} \ |
||||
|
} |
||||
|
|
||||
|
#define KHASH_DECLARE(name, khkey_t, khval_t) \ |
||||
|
__KHASH_TYPE(name, khkey_t, khval_t) \ |
||||
|
__KHASH_PROTOTYPES(name, khkey_t, khval_t) |
||||
|
|
||||
|
#define KHASH_INIT2(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \ |
||||
|
__KHASH_TYPE(name, khkey_t, khval_t) \ |
||||
|
__KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) |
||||
|
|
||||
|
#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \ |
||||
|
KHASH_INIT2(name, static kh_inline klib_unused, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) |
||||
|
|
||||
|
/* --- BEGIN OF HASH FUNCTIONS --- */ |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Integer hash function |
||||
|
@param key The integer [khint32_t] |
||||
|
@return The hash value [khint_t] |
||||
|
*/ |
||||
|
#define kh_int_hash_func(key) (khint32_t)(key) |
||||
|
/*! @function |
||||
|
@abstract Integer comparison function |
||||
|
*/ |
||||
|
#define kh_int_hash_equal(a, b) ((a) == (b)) |
||||
|
/*! @function |
||||
|
@abstract 64-bit integer hash function |
||||
|
@param key The integer [khint64_t] |
||||
|
@return The hash value [khint_t] |
||||
|
*/ |
||||
|
#define kh_int64_hash_func(key) (khint32_t)((key)>>33^(key)^(key)<<11) |
||||
|
/*! @function |
||||
|
@abstract 64-bit integer comparison function |
||||
|
*/ |
||||
|
#define kh_int64_hash_equal(a, b) ((a) == (b)) |
||||
|
/*! @function |
||||
|
@abstract const char* hash function |
||||
|
@param s Pointer to a null terminated string |
||||
|
@return The hash value |
||||
|
*/ |
||||
|
static kh_inline khint_t __ac_X31_hash_string(const char *s) |
||||
|
{ |
||||
|
khint_t h = (khint_t)*s; |
||||
|
if (h) for (++s ; *s; ++s) h = (h << 5) - h + (khint_t)*s; |
||||
|
return h; |
||||
|
} |
||||
|
/*! @function |
||||
|
@abstract Another interface to const char* hash function |
||||
|
@param key Pointer to a null terminated string [const char*] |
||||
|
@return The hash value [khint_t] |
||||
|
*/ |
||||
|
#define kh_str_hash_func(key) __ac_X31_hash_string(key) |
||||
|
/*! @function |
||||
|
@abstract Const char* comparison function |
||||
|
*/ |
||||
|
#define kh_str_hash_equal(a, b) (strcmp(a, b) == 0) |
||||
|
|
||||
|
static kh_inline khint_t __ac_Wang_hash(khint_t key) |
||||
|
{ |
||||
|
key += ~(key << 15); |
||||
|
key ^= (key >> 10); |
||||
|
key += (key << 3); |
||||
|
key ^= (key >> 6); |
||||
|
key += ~(key << 11); |
||||
|
key ^= (key >> 16); |
||||
|
return key; |
||||
|
} |
||||
|
#define kh_int_hash_func2(key) __ac_Wang_hash((khint_t)key) |
||||
|
|
||||
|
/* --- END OF HASH FUNCTIONS --- */ |
||||
|
|
||||
|
/* Other convenient macros... */ |
||||
|
|
||||
|
/*! |
||||
|
@abstract Type of the hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
*/ |
||||
|
#define khash_t(name) kh_##name##_t |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Initiate a hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@return Pointer to the hash table [khash_t(name)*] |
||||
|
*/ |
||||
|
#define kh_init(name) kh_init_##name() |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Destroy a hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
*/ |
||||
|
#define kh_destroy(name, h) kh_destroy_##name(h) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Reset a hash table without deallocating memory. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
*/ |
||||
|
#define kh_clear(name, h) kh_clear_##name(h) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Resize a hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param s New size [khint_t] |
||||
|
*/ |
||||
|
#define kh_resize(name, h, s) kh_resize_##name(h, s) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Insert a key to the hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param k Key [type of keys] |
||||
|
@param r Extra return code: -1 if the operation failed; |
||||
|
0 if the key is present in the hash table; |
||||
|
1 if the bucket is empty (never used); 2 if the element in |
||||
|
the bucket has been deleted [int*] |
||||
|
@return Iterator to the inserted element [khint_t] |
||||
|
*/ |
||||
|
#define kh_put(name, h, k, r) kh_put_##name(h, k, r) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Retrieve a key from the hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param k Key [type of keys] |
||||
|
@return Iterator to the found element, or kh_end(h) if the element is absent [khint_t] |
||||
|
*/ |
||||
|
#define kh_get(name, h, k) kh_get_##name(h, k) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Remove a key from the hash table. |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param k Iterator to the element to be deleted [khint_t] |
||||
|
*/ |
||||
|
#define kh_del(name, h, k) kh_del_##name(h, k) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Test whether a bucket contains data. |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param x Iterator to the bucket [khint_t] |
||||
|
@return 1 if containing data; 0 otherwise [int] |
||||
|
*/ |
||||
|
#define kh_exist(h, x) (!__ac_iseither((h)->flags, (x))) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get key given an iterator |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param x Iterator to the bucket [khint_t] |
||||
|
@return Key [type of keys] |
||||
|
*/ |
||||
|
#define kh_key(h, x) ((h)->keys[x]) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get value given an iterator |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param x Iterator to the bucket [khint_t] |
||||
|
@return Value [type of values] |
||||
|
@discussion For hash sets, calling this results in segfault. |
||||
|
*/ |
||||
|
#define kh_val(h, x) ((h)->vals[x]) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Alias of kh_val() |
||||
|
*/ |
||||
|
#define kh_value(h, x) ((h)->vals[x]) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get the start iterator |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@return The start iterator [khint_t] |
||||
|
*/ |
||||
|
#define kh_begin(h) (khint_t)(0) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get the end iterator |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@return The end iterator [khint_t] |
||||
|
*/ |
||||
|
#define kh_end(h) ((h)->n_buckets) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get the number of elements in the hash table |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@return Number of elements in the hash table [khint_t] |
||||
|
*/ |
||||
|
#define kh_size(h) ((h)->size) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Get the number of buckets in the hash table |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@return Number of buckets in the hash table [khint_t] |
||||
|
*/ |
||||
|
#define kh_n_buckets(h) ((h)->n_buckets) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Iterate over the entries in the hash table |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param kvar Variable to which key will be assigned |
||||
|
@param vvar Variable to which value will be assigned |
||||
|
@param code Block of code to execute |
||||
|
*/ |
||||
|
#define kh_foreach(h, kvar, vvar, code) { khint_t __i; \ |
||||
|
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \ |
||||
|
if (!kh_exist(h,__i)) continue; \ |
||||
|
(kvar) = kh_key(h,__i); \ |
||||
|
(vvar) = kh_val(h,__i); \ |
||||
|
code; \ |
||||
|
} } |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Iterate over the values in the hash table |
||||
|
@param h Pointer to the hash table [khash_t(name)*] |
||||
|
@param vvar Variable to which value will be assigned |
||||
|
@param code Block of code to execute |
||||
|
*/ |
||||
|
#define kh_foreach_value(h, vvar, code) { khint_t __i; \ |
||||
|
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \ |
||||
|
if (!kh_exist(h,__i)) continue; \ |
||||
|
(vvar) = kh_val(h,__i); \ |
||||
|
code; \ |
||||
|
} } |
||||
|
|
||||
|
/* More convenient interfaces */ |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash set containing integer keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
*/ |
||||
|
#define KHASH_SET_INIT_INT(name) \ |
||||
|
KHASH_INIT(name, khint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash map containing integer keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param khval_t Type of values [type] |
||||
|
*/ |
||||
|
#define KHASH_MAP_INIT_INT(name, khval_t) \ |
||||
|
KHASH_INIT(name, khint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash set containing 64-bit integer keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
*/ |
||||
|
#define KHASH_SET_INIT_INT64(name) \ |
||||
|
KHASH_INIT(name, khint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash map containing 64-bit integer keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param khval_t Type of values [type] |
||||
|
*/ |
||||
|
#define KHASH_MAP_INIT_INT64(name, khval_t) \ |
||||
|
KHASH_INIT(name, khint64_t, khval_t, 1, kh_int64_hash_func, kh_int64_hash_equal) |
||||
|
|
||||
|
typedef const char *kh_cstr_t; |
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash map containing const char* keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
*/ |
||||
|
#define KHASH_SET_INIT_STR(name) \ |
||||
|
KHASH_INIT(name, kh_cstr_t, char, 0, kh_str_hash_func, kh_str_hash_equal) |
||||
|
|
||||
|
/*! @function |
||||
|
@abstract Instantiate a hash map containing const char* keys |
||||
|
@param name Name of the hash table [symbol] |
||||
|
@param khval_t Type of values [type] |
||||
|
*/ |
||||
|
#define KHASH_MAP_INIT_STR(name, khval_t) \ |
||||
|
KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal) |
||||
|
|
||||
|
#endif /* __AC_KHASH_H */ |
||||
@ -0,0 +1,92 @@ |
|||||
|
/* The MIT License |
||||
|
|
||||
|
Copyright (c) 2008, by Attractive Chaos <attractor@live.co.uk> |
||||
|
|
||||
|
Permission is hereby granted, free of charge, to any person obtaining |
||||
|
a copy of this software and associated documentation files (the |
||||
|
"Software"), to deal in the Software without restriction, including |
||||
|
without limitation the rights to use, copy, modify, merge, publish, |
||||
|
distribute, sublicense, and/or sell copies of the Software, and to |
||||
|
permit persons to whom the Software is furnished to do so, subject to |
||||
|
the following conditions: |
||||
|
|
||||
|
The above copyright notice and this permission notice shall be |
||||
|
included in all copies or substantial portions of the Software. |
||||
|
|
||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
||||
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
||||
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
||||
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
||||
|
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
||||
|
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||||
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
||||
|
SOFTWARE. |
||||
|
*/ |
||||
|
|
||||
|
/* |
||||
|
An example: |
||||
|
|
||||
|
#include "kvec.h" |
||||
|
int main() { |
||||
|
kvec_t(int) array; |
||||
|
kv_init(array); |
||||
|
kv_push(int, array, 10); // append |
||||
|
kv_a(int, array, 20) = 5; // dynamic |
||||
|
kv_A(array, 20) = 4; // static |
||||
|
kv_destroy(array); |
||||
|
return 0; |
||||
|
} |
||||
|
*/ |
||||
|
|
||||
|
/* |
||||
|
2008-09-22 (0.1.0): |
||||
|
|
||||
|
* The initial version. |
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
#ifndef AC_KVEC_H |
||||
|
#define AC_KVEC_H |
||||
|
|
||||
|
#include <stdlib.h> |
||||
|
|
||||
|
#define kv_roundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x)) |
||||
|
|
||||
|
#define kvec_t(type) struct { size_t n, m; type *a; } |
||||
|
#define kv_init(v) ((v).n = (v).m = 0, (v).a = 0) |
||||
|
#define kv_destroy(v) free((v).a) |
||||
|
#define kv_A(v, i) ((v).a[(i)]) |
||||
|
#define kv_pop(v) ((v).a[--(v).n]) |
||||
|
#define kv_size(v) ((v).n) |
||||
|
#define kv_max(v) ((v).m) |
||||
|
#define kv_end(v) (kv_A(v,kv_size(v)-1)) |
||||
|
#define kv_delete(v,i) (kv_A(v,i) = kv_pop(v)) |
||||
|
|
||||
|
#define kv_resize(type, v, s) ((v).m = (s), (v).a = (type*)realloc((v).a, sizeof(type) * (v).m)) |
||||
|
|
||||
|
#define kv_copy(type, v1, v0) do { \ |
||||
|
if ((v1).m < (v0).n) kv_resize(type, v1, (v0).n); \ |
||||
|
(v1).n = (v0).n; \ |
||||
|
memcpy((v1).a, (v0).a, sizeof(type) * (v0).n); \ |
||||
|
} while (0) \ |
||||
|
|
||||
|
#define kv_push(type, v, x) do { \ |
||||
|
if ((v).n == (v).m) { \ |
||||
|
(v).m = (v).m? (v).m<<1 : 2; \ |
||||
|
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m); \ |
||||
|
} \ |
||||
|
(v).a[(v).n++] = (x); \ |
||||
|
} while (0) |
||||
|
|
||||
|
#define kv_pushp(type, v) (((v).n == (v).m)? \ |
||||
|
((v).m = ((v).m? (v).m<<1 : 2), \ |
||||
|
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \ |
||||
|
: 0), ((v).a + ((v).n++)) |
||||
|
|
||||
|
#define kv_a(type, v, i) (((v).m <= (size_t)(i)? \ |
||||
|
((v).m = (v).n = (i) + 1, kv_roundup32((v).m), \ |
||||
|
(v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \ |
||||
|
: (v).n <= (size_t)(i)? (v).n = (i) + 1 \ |
||||
|
: 0), (v).a[(i)]) |
||||
|
|
||||
|
#endif |
||||
@ -0,0 +1,213 @@ |
|||||
|
/* |
||||
|
ISC License |
||||
|
|
||||
|
Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link> |
||||
|
|
||||
|
Permission to use, copy, modify, and/or distribute this software for any |
||||
|
purpose with or without fee is hereby granted, provided that the above |
||||
|
copyright notice and this permission notice appear in all copies. |
||||
|
|
||||
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
||||
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
||||
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
||||
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
||||
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
||||
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
||||
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
||||
|
*/ |
||||
|
|
||||
|
#pragma once |
||||
|
|
||||
|
#include "fmp.h" |
||||
|
|
||||
|
#include <pthread.h> |
||||
|
|
||||
|
|
||||
|
typedef struct lfmp_t lfmp_t; |
||||
|
struct lfmp_t |
||||
|
{ |
||||
|
fmp_t fmp; |
||||
|
pthread_mutex_t lock; |
||||
|
}; |
||||
|
|
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
lfmp_init(lfmp_t *lfmp_, |
||||
|
const uint64_t obj_size_, |
||||
|
const uint64_t page_multiple_) |
||||
|
{ |
||||
|
fmp_init(&lfmp_->fmp,obj_size_,page_multiple_); |
||||
|
pthread_mutex_init(&lfmp_->lock,NULL); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
lfmp_slab_count(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
uint64_t rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_slab_count(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
int |
||||
|
lfmp_slab_alloc(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
int rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_slab_alloc(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
lfmp_alloc(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
void *rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_alloc(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void* |
||||
|
lfmp_calloc(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
void *rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_calloc(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
lfmp_free(lfmp_t *lfmp_, |
||||
|
void *obj_) |
||||
|
{ |
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
fmp_free(&lfmp_->fmp,obj_); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
lfmp_clear(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
fmp_clear(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
lfmp_destroy(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
fmp_destroy(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
pthread_mutex_destroy(&lfmp_->lock); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
lfmp_avail_objs(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
uint64_t rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_avail_objs(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
lfmp_objs_in_slab(lfmp_t *lfmp_, |
||||
|
void *slab_) |
||||
|
{ |
||||
|
uint64_t rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_objs_in_slab(&lfmp_->fmp,slab_); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
void |
||||
|
lfmp_remove_objs_in_slab(lfmp_t *lfmp_, |
||||
|
void *slab_) |
||||
|
{ |
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
fmp_remove_objs_in_slab(&lfmp_->fmp,slab_); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
int |
||||
|
lfmp_gc(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
int rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_gc(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
uint64_t |
||||
|
lfmp_objs_per_slab(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
uint64_t rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_objs_per_slab(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
|
|
||||
|
static |
||||
|
inline |
||||
|
double |
||||
|
lfmp_slab_usage_ratio(lfmp_t *lfmp_) |
||||
|
{ |
||||
|
double rv; |
||||
|
|
||||
|
pthread_mutex_lock(&lfmp_->lock); |
||||
|
rv = fmp_slab_usage_ratio(&lfmp_->fmp); |
||||
|
pthread_mutex_unlock(&lfmp_->lock); |
||||
|
|
||||
|
return rv; |
||||
|
} |
||||
Write
Preview
Loading…
Cancel
Save
Reference in new issue