[Mesa-dev] [PATCH 31/53] i965/drm: Switch from uthash to Mesa's hash table.
Kenneth Graunke
kenneth at whitecape.org
Wed Apr 5 00:10:21 UTC 2017
No performance data has been gathered about this choice. I just don't
want that many hash tables.
---
src/mesa/drivers/dri/i965/Makefile.sources | 3 +-
src/mesa/drivers/dri/i965/intel_bufmgr_gem.c | 79 +-
src/mesa/drivers/dri/i965/uthash.h | 1074 --------------------------
3 files changed, 53 insertions(+), 1103 deletions(-)
delete mode 100644 src/mesa/drivers/dri/i965/uthash.h
diff --git a/src/mesa/drivers/dri/i965/Makefile.sources b/src/mesa/drivers/dri/i965/Makefile.sources
index 9b550dc17cc..6cab4eb5f43 100644
--- a/src/mesa/drivers/dri/i965/Makefile.sources
+++ b/src/mesa/drivers/dri/i965/Makefile.sources
@@ -160,8 +160,7 @@ i965_FILES = \
intel_tiled_memcpy.c \
intel_tiled_memcpy.h \
intel_upload.c \
- libdrm_macros.h \
- uthash.h
+ libdrm_macros.h
i965_gen6_FILES = \
genX_blorp_exec.c
diff --git a/src/mesa/drivers/dri/i965/intel_bufmgr_gem.c b/src/mesa/drivers/dri/i965/intel_bufmgr_gem.c
index 499cd19808f..98f2e131377 100644
--- a/src/mesa/drivers/dri/i965/intel_bufmgr_gem.c
+++ b/src/mesa/drivers/dri/i965/intel_bufmgr_gem.c
@@ -61,12 +61,12 @@
#include "libdrm_macros.h"
#include "main/macros.h"
#include "util/macros.h"
+#include "util/hash_table.h"
#include "util/list.h"
#include "brw_bufmgr.h"
#include "string.h"
#include "i915_drm.h"
-#include "uthash.h"
#ifdef HAVE_VALGRIND
#include <valgrind.h>
@@ -139,8 +139,8 @@ typedef struct _drm_bacon_bufmgr {
struct list_head managers;
- drm_bacon_bo_gem *name_table;
- drm_bacon_bo_gem *handle_table;
+ struct hash_table *name_table;
+ struct hash_table *handle_table;
struct list_head vma_cache;
int vma_count, vma_open, vma_max;
@@ -169,9 +169,6 @@ struct _drm_bacon_bo_gem {
*/
unsigned int global_name;
- UT_hash_handle handle_hh;
- UT_hash_handle name_hh;
-
/**
* Index of the buffer within the validation list while preparing a
* batchbuffer execution.
@@ -272,6 +269,25 @@ static inline drm_bacon_bo_gem *to_bo_gem(drm_bacon_bo *bo)
return (drm_bacon_bo_gem *)bo;
}
+static uint32_t
+key_hash_uint(const void *key)
+{
+ return _mesa_hash_data(key, 4);
+}
+
+static bool
+key_uint_equal(const void *a, const void *b)
+{
+ return *((unsigned *) a) == *((unsigned *) b);
+}
+
+static drm_bacon_bo_gem *
+hash_find_bo(struct hash_table *ht, unsigned int key)
+{
+ struct hash_entry *entry = _mesa_hash_table_search(ht, &key);
+ return entry ? (drm_bacon_bo_gem *) entry->data : NULL;
+}
+
static unsigned long
drm_bacon_gem_bo_tile_size(drm_bacon_bufmgr *bufmgr, unsigned long size,
uint32_t *tiling_mode)
@@ -635,9 +651,8 @@ retry:
}
bo_gem->gem_handle = create.handle;
- HASH_ADD(handle_hh, bufmgr->handle_table,
- gem_handle, sizeof(bo_gem->gem_handle),
- bo_gem);
+ _mesa_hash_table_insert(bufmgr->handle_table,
+ &bo_gem->gem_handle, bo_gem);
bo_gem->bo.handle = bo_gem->gem_handle;
bo_gem->bo.bufmgr = bufmgr;
@@ -767,8 +782,7 @@ drm_bacon_bo_gem_create_from_name(drm_bacon_bufmgr *bufmgr,
* provides a sufficiently fast match.
*/
pthread_mutex_lock(&bufmgr->lock);
- HASH_FIND(name_hh, bufmgr->name_table,
- &handle, sizeof(handle), bo_gem);
+ bo_gem = hash_find_bo(bufmgr->name_table, handle);
if (bo_gem) {
drm_bacon_bo_reference(&bo_gem->bo);
goto out;
@@ -789,8 +803,7 @@ drm_bacon_bo_gem_create_from_name(drm_bacon_bufmgr *bufmgr,
* object from the kernel before by looking through the list
* again for a matching gem_handle
*/
- HASH_FIND(handle_hh, bufmgr->handle_table,
- &open_arg.handle, sizeof(open_arg.handle), bo_gem);
+ bo_gem = hash_find_bo(bufmgr->handle_table, open_arg.handle);
if (bo_gem) {
drm_bacon_bo_reference(&bo_gem->bo);
goto out;
@@ -814,10 +827,10 @@ drm_bacon_bo_gem_create_from_name(drm_bacon_bufmgr *bufmgr,
bo_gem->global_name = handle;
bo_gem->reusable = false;
- HASH_ADD(handle_hh, bufmgr->handle_table,
- gem_handle, sizeof(bo_gem->gem_handle), bo_gem);
- HASH_ADD(name_hh, bufmgr->name_table,
- global_name, sizeof(bo_gem->global_name), bo_gem);
+ _mesa_hash_table_insert(bufmgr->handle_table,
+ &bo_gem->gem_handle, bo_gem);
+ _mesa_hash_table_insert(bufmgr->name_table,
+ &bo_gem->global_name, bo_gem);
memclear(get_tiling);
get_tiling.handle = bo_gem->gem_handle;
@@ -849,6 +862,7 @@ drm_bacon_gem_bo_free(drm_bacon_bo *bo)
drm_bacon_bufmgr *bufmgr = bo->bufmgr;
drm_bacon_bo_gem *bo_gem = (drm_bacon_bo_gem *) bo;
struct drm_gem_close close;
+ struct hash_entry *entry;
int ret;
list_del(&bo_gem->vma_list);
@@ -867,9 +881,14 @@ drm_bacon_gem_bo_free(drm_bacon_bo *bo)
bufmgr->vma_count--;
}
- if (bo_gem->global_name)
- HASH_DELETE(name_hh, bufmgr->name_table, bo_gem);
- HASH_DELETE(handle_hh, bufmgr->handle_table, bo_gem);
+ if (bo_gem->global_name) {
+ entry = _mesa_hash_table_search(bufmgr->name_table,
+ &bo_gem->global_name);
+ _mesa_hash_table_remove(bufmgr->name_table, entry);
+ }
+ entry = _mesa_hash_table_search(bufmgr->handle_table,
+ &bo_gem->gem_handle);
+ _mesa_hash_table_remove(bufmgr->handle_table, entry);
/* Close this object */
memclear(close);
@@ -1523,6 +1542,9 @@ drm_bacon_bufmgr_gem_destroy(drm_bacon_bufmgr *bufmgr)
}
}
+ _mesa_hash_table_destroy(bufmgr->name_table, NULL);
+ _mesa_hash_table_destroy(bufmgr->handle_table, NULL);
+
free(bufmgr);
}
@@ -1894,8 +1916,7 @@ drm_bacon_bo_gem_create_from_prime(drm_bacon_bufmgr *bufmgr, int prime_fd, int s
* for named buffers, we must not create two bo's pointing at the same
* kernel object
*/
- HASH_FIND(handle_hh, bufmgr->handle_table,
- &handle, sizeof(handle), bo_gem);
+ bo_gem = hash_find_bo(bufmgr->handle_table, handle);
if (bo_gem) {
drm_bacon_bo_reference(&bo_gem->bo);
goto out;
@@ -1923,8 +1944,8 @@ drm_bacon_bo_gem_create_from_prime(drm_bacon_bufmgr *bufmgr, int prime_fd, int s
bo_gem->bo.bufmgr = bufmgr;
bo_gem->gem_handle = handle;
- HASH_ADD(handle_hh, bufmgr->handle_table,
- gem_handle, sizeof(bo_gem->gem_handle), bo_gem);
+ _mesa_hash_table_insert(bufmgr->handle_table,
+ &bo_gem->gem_handle, bo_gem);
bo_gem->name = "prime";
bo_gem->validate_index = -1;
@@ -1988,9 +2009,8 @@ drm_bacon_bo_flink(drm_bacon_bo *bo, uint32_t *name)
bo_gem->global_name = flink.name;
bo_gem->reusable = false;
- HASH_ADD(name_hh, bufmgr->name_table,
- global_name, sizeof(bo_gem->global_name),
- bo_gem);
+ _mesa_hash_table_insert(bufmgr->name_table,
+ &bo_gem->global_name, bo_gem);
}
pthread_mutex_unlock(&bufmgr->lock);
}
@@ -2565,6 +2585,11 @@ drm_bacon_bufmgr_gem_init(struct gen_device_info *devinfo,
list_add(&bufmgr->managers, &bufmgr_list);
+ bufmgr->name_table =
+ _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
+ bufmgr->handle_table =
+ _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
+
exit:
pthread_mutex_unlock(&bufmgr_list_mutex);
diff --git a/src/mesa/drivers/dri/i965/uthash.h b/src/mesa/drivers/dri/i965/uthash.h
deleted file mode 100644
index 45d1f9fc12a..00000000000
--- a/src/mesa/drivers/dri/i965/uthash.h
+++ /dev/null
@@ -1,1074 +0,0 @@
-/*
-Copyright (c) 2003-2016, Troy D. Hanson http://troydhanson.github.com/uthash/
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifndef UTHASH_H
-#define UTHASH_H
-
-#define UTHASH_VERSION 2.0.1
-
-#include <string.h> /* memcmp,strlen */
-#include <stddef.h> /* ptrdiff_t */
-#include <stdlib.h> /* exit() */
-
-/* These macros use decltype or the earlier __typeof GNU extension.
- As decltype is only available in newer compilers (VS2010 or gcc 4.3+
- when compiling c++ source) this code uses whatever method is needed
- or, for VS2008 where neither is available, uses casting workarounds. */
-#if defined(_MSC_VER) /* MS compiler */
-#if _MSC_VER >= 1600 && defined(__cplusplus) /* VS2010 or newer in C++ mode */
-#define DECLTYPE(x) (decltype(x))
-#else /* VS2008 or older (or VS2010 in C mode) */
-#define NO_DECLTYPE
-#define DECLTYPE(x)
-#endif
-#elif defined(__BORLANDC__) || defined(__LCC__) || defined(__WATCOMC__)
-#define NO_DECLTYPE
-#define DECLTYPE(x)
-#else /* GNU, Sun and other compilers */
-#define DECLTYPE(x) (__typeof(x))
-#endif
-
-#ifdef NO_DECLTYPE
-#define DECLTYPE_ASSIGN(dst,src) \
-do { \
- char **_da_dst = (char**)(&(dst)); \
- *_da_dst = (char*)(src); \
-} while (0)
-#else
-#define DECLTYPE_ASSIGN(dst,src) \
-do { \
- (dst) = DECLTYPE(dst)(src); \
-} while (0)
-#endif
-
-/* a number of the hash function use uint32_t which isn't defined on Pre VS2010 */
-#if defined(_WIN32)
-#if defined(_MSC_VER) && _MSC_VER >= 1600
-#include <stdint.h>
-#elif defined(__WATCOMC__) || defined(__MINGW32__) || defined(__CYGWIN__)
-#include <stdint.h>
-#else
-typedef unsigned int uint32_t;
-typedef unsigned char uint8_t;
-#endif
-#elif defined(__GNUC__) && !defined(__VXWORKS__)
-#include <stdint.h>
-#else
-typedef unsigned int uint32_t;
-typedef unsigned char uint8_t;
-#endif
-
-#ifndef uthash_fatal
-#define uthash_fatal(msg) exit(-1) /* fatal error (out of memory,etc) */
-#endif
-#ifndef uthash_malloc
-#define uthash_malloc(sz) malloc(sz) /* malloc fcn */
-#endif
-#ifndef uthash_free
-#define uthash_free(ptr,sz) free(ptr) /* free fcn */
-#endif
-#ifndef uthash_strlen
-#define uthash_strlen(s) strlen(s)
-#endif
-#ifndef uthash_memcmp
-#define uthash_memcmp(a,b,n) memcmp(a,b,n)
-#endif
-
-#ifndef uthash_noexpand_fyi
-#define uthash_noexpand_fyi(tbl) /* can be defined to log noexpand */
-#endif
-#ifndef uthash_expand_fyi
-#define uthash_expand_fyi(tbl) /* can be defined to log expands */
-#endif
-
-/* initial number of buckets */
-#define HASH_INITIAL_NUM_BUCKETS 32U /* initial number of buckets */
-#define HASH_INITIAL_NUM_BUCKETS_LOG2 5U /* lg2 of initial number of buckets */
-#define HASH_BKT_CAPACITY_THRESH 10U /* expand when bucket count reaches */
-
-/* calculate the element whose hash handle address is hhp */
-#define ELMT_FROM_HH(tbl,hhp) ((void*)(((char*)(hhp)) - ((tbl)->hho)))
-/* calculate the hash handle from element address elp */
-#define HH_FROM_ELMT(tbl,elp) ((UT_hash_handle *)(((char*)(elp)) + ((tbl)->hho)))
-
-#define HASH_VALUE(keyptr,keylen,hashv) \
-do { \
- HASH_FCN(keyptr, keylen, hashv); \
-} while (0)
-
-#define HASH_FIND_BYHASHVALUE(hh,head,keyptr,keylen,hashval,out) \
-do { \
- (out) = NULL; \
- if (head) { \
- unsigned _hf_bkt; \
- HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _hf_bkt); \
- if (HASH_BLOOM_TEST((head)->hh.tbl, hashval) != 0) { \
- HASH_FIND_IN_BKT((head)->hh.tbl, hh, (head)->hh.tbl->buckets[ _hf_bkt ], keyptr, keylen, hashval, out); \
- } \
- } \
-} while (0)
-
-#define HASH_FIND(hh,head,keyptr,keylen,out) \
-do { \
- unsigned _hf_hashv; \
- HASH_VALUE(keyptr, keylen, _hf_hashv); \
- HASH_FIND_BYHASHVALUE(hh, head, keyptr, keylen, _hf_hashv, out); \
-} while (0)
-
-#ifdef HASH_BLOOM
-#define HASH_BLOOM_BITLEN (1UL << HASH_BLOOM)
-#define HASH_BLOOM_BYTELEN (HASH_BLOOM_BITLEN/8UL) + (((HASH_BLOOM_BITLEN%8UL)!=0UL) ? 1UL : 0UL)
-#define HASH_BLOOM_MAKE(tbl) \
-do { \
- (tbl)->bloom_nbits = HASH_BLOOM; \
- (tbl)->bloom_bv = (uint8_t*)uthash_malloc(HASH_BLOOM_BYTELEN); \
- if (!((tbl)->bloom_bv)) { uthash_fatal( "out of memory"); } \
- memset((tbl)->bloom_bv, 0, HASH_BLOOM_BYTELEN); \
- (tbl)->bloom_sig = HASH_BLOOM_SIGNATURE; \
-} while (0)
-
-#define HASH_BLOOM_FREE(tbl) \
-do { \
- uthash_free((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
-} while (0)
-
-#define HASH_BLOOM_BITSET(bv,idx) (bv[(idx)/8U] |= (1U << ((idx)%8U)))
-#define HASH_BLOOM_BITTEST(bv,idx) (bv[(idx)/8U] & (1U << ((idx)%8U)))
-
-#define HASH_BLOOM_ADD(tbl,hashv) \
- HASH_BLOOM_BITSET((tbl)->bloom_bv, (hashv & (uint32_t)((1ULL << (tbl)->bloom_nbits) - 1U)))
-
-#define HASH_BLOOM_TEST(tbl,hashv) \
- HASH_BLOOM_BITTEST((tbl)->bloom_bv, (hashv & (uint32_t)((1ULL << (tbl)->bloom_nbits) - 1U)))
-
-#else
-#define HASH_BLOOM_MAKE(tbl)
-#define HASH_BLOOM_FREE(tbl)
-#define HASH_BLOOM_ADD(tbl,hashv)
-#define HASH_BLOOM_TEST(tbl,hashv) (1)
-#define HASH_BLOOM_BYTELEN 0U
-#endif
-
-#define HASH_MAKE_TABLE(hh,head) \
-do { \
- (head)->hh.tbl = (UT_hash_table*)uthash_malloc( \
- sizeof(UT_hash_table)); \
- if (!((head)->hh.tbl)) { uthash_fatal( "out of memory"); } \
- memset((head)->hh.tbl, 0, sizeof(UT_hash_table)); \
- (head)->hh.tbl->tail = &((head)->hh); \
- (head)->hh.tbl->num_buckets = HASH_INITIAL_NUM_BUCKETS; \
- (head)->hh.tbl->log2_num_buckets = HASH_INITIAL_NUM_BUCKETS_LOG2; \
- (head)->hh.tbl->hho = (char*)(&(head)->hh) - (char*)(head); \
- (head)->hh.tbl->buckets = (UT_hash_bucket*)uthash_malloc( \
- HASH_INITIAL_NUM_BUCKETS*sizeof(struct UT_hash_bucket)); \
- if (! (head)->hh.tbl->buckets) { uthash_fatal( "out of memory"); } \
- memset((head)->hh.tbl->buckets, 0, \
- HASH_INITIAL_NUM_BUCKETS*sizeof(struct UT_hash_bucket)); \
- HASH_BLOOM_MAKE((head)->hh.tbl); \
- (head)->hh.tbl->signature = HASH_SIGNATURE; \
-} while (0)
-
-#define HASH_REPLACE_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,replaced,cmpfcn) \
-do { \
- (replaced) = NULL; \
- HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
- if (replaced) { \
- HASH_DELETE(hh, head, replaced); \
- } \
- HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn); \
-} while (0)
-
-#define HASH_REPLACE_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add,replaced) \
-do { \
- (replaced) = NULL; \
- HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
- if (replaced) { \
- HASH_DELETE(hh, head, replaced); \
- } \
- HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add); \
-} while (0)
-
-#define HASH_REPLACE(hh,head,fieldname,keylen_in,add,replaced) \
-do { \
- unsigned _hr_hashv; \
- HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
- HASH_REPLACE_BYHASHVALUE(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced); \
-} while (0)
-
-#define HASH_REPLACE_INORDER(hh,head,fieldname,keylen_in,add,replaced,cmpfcn) \
-do { \
- unsigned _hr_hashv; \
- HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
- HASH_REPLACE_BYHASHVALUE_INORDER(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced, cmpfcn); \
-} while (0)
-
-#define HASH_APPEND_LIST(hh, head, add) \
-do { \
- (add)->hh.next = NULL; \
- (add)->hh.prev = ELMT_FROM_HH((head)->hh.tbl, (head)->hh.tbl->tail); \
- (head)->hh.tbl->tail->next = (add); \
- (head)->hh.tbl->tail = &((add)->hh); \
-} while (0)
-
-#define HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh,head,keyptr,keylen_in,hashval,add,cmpfcn) \
-do { \
- unsigned _ha_bkt; \
- (add)->hh.hashv = (hashval); \
- (add)->hh.key = (char*) (keyptr); \
- (add)->hh.keylen = (unsigned) (keylen_in); \
- if (!(head)) { \
- (add)->hh.next = NULL; \
- (add)->hh.prev = NULL; \
- (head) = (add); \
- HASH_MAKE_TABLE(hh, head); \
- } else { \
- struct UT_hash_handle *_hs_iter = &(head)->hh; \
- (add)->hh.tbl = (head)->hh.tbl; \
- do { \
- if (cmpfcn(DECLTYPE(head) ELMT_FROM_HH((head)->hh.tbl, _hs_iter), add) > 0) \
- break; \
- } while ((_hs_iter = _hs_iter->next)); \
- if (_hs_iter) { \
- (add)->hh.next = _hs_iter; \
- if (((add)->hh.prev = _hs_iter->prev)) { \
- HH_FROM_ELMT((head)->hh.tbl, _hs_iter->prev)->next = (add); \
- } else { \
- (head) = (add); \
- } \
- _hs_iter->prev = (add); \
- } else { \
- HASH_APPEND_LIST(hh, head, add); \
- } \
- } \
- (head)->hh.tbl->num_items++; \
- HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
- HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], &(add)->hh); \
- HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
- HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
- HASH_FSCK(hh, head); \
-} while (0)
-
-#define HASH_ADD_KEYPTR_INORDER(hh,head,keyptr,keylen_in,add,cmpfcn) \
-do { \
- unsigned _hs_hashv; \
- HASH_VALUE(keyptr, keylen_in, _hs_hashv); \
- HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, keyptr, keylen_in, _hs_hashv, add, cmpfcn); \
-} while (0)
-
-#define HASH_ADD_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,cmpfcn) \
- HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn)
-
-#define HASH_ADD_INORDER(hh,head,fieldname,keylen_in,add,cmpfcn) \
- HASH_ADD_KEYPTR_INORDER(hh, head, &((add)->fieldname), keylen_in, add, cmpfcn)
-
-#define HASH_ADD_KEYPTR_BYHASHVALUE(hh,head,keyptr,keylen_in,hashval,add) \
-do { \
- unsigned _ha_bkt; \
- (add)->hh.hashv = (hashval); \
- (add)->hh.key = (char*) (keyptr); \
- (add)->hh.keylen = (unsigned) (keylen_in); \
- if (!(head)) { \
- (add)->hh.next = NULL; \
- (add)->hh.prev = NULL; \
- (head) = (add); \
- HASH_MAKE_TABLE(hh, head); \
- } else { \
- (add)->hh.tbl = (head)->hh.tbl; \
- HASH_APPEND_LIST(hh, head, add); \
- } \
- (head)->hh.tbl->num_items++; \
- HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
- HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], &(add)->hh); \
- HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
- HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
- HASH_FSCK(hh, head); \
-} while (0)
-
-#define HASH_ADD_KEYPTR(hh,head,keyptr,keylen_in,add) \
-do { \
- unsigned _ha_hashv; \
- HASH_VALUE(keyptr, keylen_in, _ha_hashv); \
- HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, keyptr, keylen_in, _ha_hashv, add); \
-} while (0)
-
-#define HASH_ADD_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add) \
- HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add)
-
-#define HASH_ADD(hh,head,fieldname,keylen_in,add) \
- HASH_ADD_KEYPTR(hh, head, &((add)->fieldname), keylen_in, add)
-
-#define HASH_TO_BKT(hashv,num_bkts,bkt) \
-do { \
- bkt = ((hashv) & ((num_bkts) - 1U)); \
-} while (0)
-
-/* delete "delptr" from the hash table.
- * "the usual" patch-up process for the app-order doubly-linked-list.
- * The use of _hd_hh_del below deserves special explanation.
- * These used to be expressed using (delptr) but that led to a bug
- * if someone used the same symbol for the head and deletee, like
- * HASH_DELETE(hh,users,users);
- * We want that to work, but by changing the head (users) below
- * we were forfeiting our ability to further refer to the deletee (users)
- * in the patch-up process. Solution: use scratch space to
- * copy the deletee pointer, then the latter references are via that
- * scratch pointer rather than through the repointed (users) symbol.
- */
-#define HASH_DELETE(hh,head,delptr) \
-do { \
- struct UT_hash_handle *_hd_hh_del; \
- if ( ((delptr)->hh.prev == NULL) && ((delptr)->hh.next == NULL) ) { \
- uthash_free((head)->hh.tbl->buckets, \
- (head)->hh.tbl->num_buckets*sizeof(struct UT_hash_bucket) ); \
- HASH_BLOOM_FREE((head)->hh.tbl); \
- uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
- head = NULL; \
- } else { \
- unsigned _hd_bkt; \
- _hd_hh_del = &((delptr)->hh); \
- if ((delptr) == ELMT_FROM_HH((head)->hh.tbl,(head)->hh.tbl->tail)) { \
- (head)->hh.tbl->tail = \
- (UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) + \
- (head)->hh.tbl->hho); \
- } \
- if ((delptr)->hh.prev != NULL) { \
- ((UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) + \
- (head)->hh.tbl->hho))->next = (delptr)->hh.next; \
- } else { \
- DECLTYPE_ASSIGN(head,(delptr)->hh.next); \
- } \
- if (_hd_hh_del->next != NULL) { \
- ((UT_hash_handle*)((ptrdiff_t)_hd_hh_del->next + \
- (head)->hh.tbl->hho))->prev = \
- _hd_hh_del->prev; \
- } \
- HASH_TO_BKT( _hd_hh_del->hashv, (head)->hh.tbl->num_buckets, _hd_bkt); \
- HASH_DEL_IN_BKT(hh,(head)->hh.tbl->buckets[_hd_bkt], _hd_hh_del); \
- (head)->hh.tbl->num_items--; \
- } \
- HASH_FSCK(hh,head); \
-} while (0)
-
-
-/* convenience forms of HASH_FIND/HASH_ADD/HASH_DEL */
-#define HASH_FIND_STR(head,findstr,out) \
- HASH_FIND(hh,head,findstr,(unsigned)uthash_strlen(findstr),out)
-#define HASH_ADD_STR(head,strfield,add) \
- HASH_ADD(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add)
-#define HASH_REPLACE_STR(head,strfield,add,replaced) \
- HASH_REPLACE(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add,replaced)
-#define HASH_FIND_INT(head,findint,out) \
- HASH_FIND(hh,head,findint,sizeof(int),out)
-#define HASH_ADD_INT(head,intfield,add) \
- HASH_ADD(hh,head,intfield,sizeof(int),add)
-#define HASH_REPLACE_INT(head,intfield,add,replaced) \
- HASH_REPLACE(hh,head,intfield,sizeof(int),add,replaced)
-#define HASH_FIND_PTR(head,findptr,out) \
- HASH_FIND(hh,head,findptr,sizeof(void *),out)
-#define HASH_ADD_PTR(head,ptrfield,add) \
- HASH_ADD(hh,head,ptrfield,sizeof(void *),add)
-#define HASH_REPLACE_PTR(head,ptrfield,add,replaced) \
- HASH_REPLACE(hh,head,ptrfield,sizeof(void *),add,replaced)
-#define HASH_DEL(head,delptr) \
- HASH_DELETE(hh,head,delptr)
-
-/* HASH_FSCK checks hash integrity on every add/delete when HASH_DEBUG is defined.
- * This is for uthash developer only; it compiles away if HASH_DEBUG isn't defined.
- */
-#ifdef HASH_DEBUG
-#define HASH_OOPS(...) do { fprintf(stderr,__VA_ARGS__); exit(-1); } while (0)
-#define HASH_FSCK(hh,head) \
-do { \
- struct UT_hash_handle *_thh; \
- if (head) { \
- unsigned _bkt_i; \
- unsigned _count; \
- char *_prev; \
- _count = 0; \
- for( _bkt_i = 0; _bkt_i < (head)->hh.tbl->num_buckets; _bkt_i++) { \
- unsigned _bkt_count = 0; \
- _thh = (head)->hh.tbl->buckets[_bkt_i].hh_head; \
- _prev = NULL; \
- while (_thh) { \
- if (_prev != (char*)(_thh->hh_prev)) { \
- HASH_OOPS("invalid hh_prev %p, actual %p\n", \
- _thh->hh_prev, _prev ); \
- } \
- _bkt_count++; \
- _prev = (char*)(_thh); \
- _thh = _thh->hh_next; \
- } \
- _count += _bkt_count; \
- if ((head)->hh.tbl->buckets[_bkt_i].count != _bkt_count) { \
- HASH_OOPS("invalid bucket count %u, actual %u\n", \
- (head)->hh.tbl->buckets[_bkt_i].count, _bkt_count); \
- } \
- } \
- if (_count != (head)->hh.tbl->num_items) { \
- HASH_OOPS("invalid hh item count %u, actual %u\n", \
- (head)->hh.tbl->num_items, _count ); \
- } \
- /* traverse hh in app order; check next/prev integrity, count */ \
- _count = 0; \
- _prev = NULL; \
- _thh = &(head)->hh; \
- while (_thh) { \
- _count++; \
- if (_prev !=(char*)(_thh->prev)) { \
- HASH_OOPS("invalid prev %p, actual %p\n", \
- _thh->prev, _prev ); \
- } \
- _prev = (char*)ELMT_FROM_HH((head)->hh.tbl, _thh); \
- _thh = ( _thh->next ? (UT_hash_handle*)((char*)(_thh->next) + \
- (head)->hh.tbl->hho) : NULL ); \
- } \
- if (_count != (head)->hh.tbl->num_items) { \
- HASH_OOPS("invalid app item count %u, actual %u\n", \
- (head)->hh.tbl->num_items, _count ); \
- } \
- } \
-} while (0)
-#else
-#define HASH_FSCK(hh,head)
-#endif
-
-/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to
- * the descriptor to which this macro is defined for tuning the hash function.
- * The app can #include <unistd.h> to get the prototype for write(2). */
-#ifdef HASH_EMIT_KEYS
-#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen) \
-do { \
- unsigned _klen = fieldlen; \
- write(HASH_EMIT_KEYS, &_klen, sizeof(_klen)); \
- write(HASH_EMIT_KEYS, keyptr, (unsigned long)fieldlen); \
-} while (0)
-#else
-#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)
-#endif
-
-/* default to Jenkin's hash unless overridden e.g. DHASH_FUNCTION=HASH_SAX */
-#ifdef HASH_FUNCTION
-#define HASH_FCN HASH_FUNCTION
-#else
-#define HASH_FCN HASH_JEN
-#endif
-
-/* The Bernstein hash function, used in Perl prior to v5.6. Note (x<<5+x)=x*33. */
-#define HASH_BER(key,keylen,hashv) \
-do { \
- unsigned _hb_keylen=(unsigned)keylen; \
- const unsigned char *_hb_key=(const unsigned char*)(key); \
- (hashv) = 0; \
- while (_hb_keylen-- != 0U) { \
- (hashv) = (((hashv) << 5) + (hashv)) + *_hb_key++; \
- } \
-} while (0)
-
-
-/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at
- * http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx */
-#define HASH_SAX(key,keylen,hashv) \
-do { \
- unsigned _sx_i; \
- const unsigned char *_hs_key=(const unsigned char*)(key); \
- hashv = 0; \
- for(_sx_i=0; _sx_i < keylen; _sx_i++) { \
- hashv ^= (hashv << 5) + (hashv >> 2) + _hs_key[_sx_i]; \
- } \
-} while (0)
-/* FNV-1a variation */
-#define HASH_FNV(key,keylen,hashv) \
-do { \
- unsigned _fn_i; \
- const unsigned char *_hf_key=(const unsigned char*)(key); \
- hashv = 2166136261U; \
- for(_fn_i=0; _fn_i < keylen; _fn_i++) { \
- hashv = hashv ^ _hf_key[_fn_i]; \
- hashv = hashv * 16777619U; \
- } \
-} while (0)
-
-#define HASH_OAT(key,keylen,hashv) \
-do { \
- unsigned _ho_i; \
- const unsigned char *_ho_key=(const unsigned char*)(key); \
- hashv = 0; \
- for(_ho_i=0; _ho_i < keylen; _ho_i++) { \
- hashv += _ho_key[_ho_i]; \
- hashv += (hashv << 10); \
- hashv ^= (hashv >> 6); \
- } \
- hashv += (hashv << 3); \
- hashv ^= (hashv >> 11); \
- hashv += (hashv << 15); \
-} while (0)
-
-#define HASH_JEN_MIX(a,b,c) \
-do { \
- a -= b; a -= c; a ^= ( c >> 13 ); \
- b -= c; b -= a; b ^= ( a << 8 ); \
- c -= a; c -= b; c ^= ( b >> 13 ); \
- a -= b; a -= c; a ^= ( c >> 12 ); \
- b -= c; b -= a; b ^= ( a << 16 ); \
- c -= a; c -= b; c ^= ( b >> 5 ); \
- a -= b; a -= c; a ^= ( c >> 3 ); \
- b -= c; b -= a; b ^= ( a << 10 ); \
- c -= a; c -= b; c ^= ( b >> 15 ); \
-} while (0)
-
-#define HASH_JEN(key,keylen,hashv) \
-do { \
- unsigned _hj_i,_hj_j,_hj_k; \
- unsigned const char *_hj_key=(unsigned const char*)(key); \
- hashv = 0xfeedbeefu; \
- _hj_i = _hj_j = 0x9e3779b9u; \
- _hj_k = (unsigned)(keylen); \
- while (_hj_k >= 12U) { \
- _hj_i += (_hj_key[0] + ( (unsigned)_hj_key[1] << 8 ) \
- + ( (unsigned)_hj_key[2] << 16 ) \
- + ( (unsigned)_hj_key[3] << 24 ) ); \
- _hj_j += (_hj_key[4] + ( (unsigned)_hj_key[5] << 8 ) \
- + ( (unsigned)_hj_key[6] << 16 ) \
- + ( (unsigned)_hj_key[7] << 24 ) ); \
- hashv += (_hj_key[8] + ( (unsigned)_hj_key[9] << 8 ) \
- + ( (unsigned)_hj_key[10] << 16 ) \
- + ( (unsigned)_hj_key[11] << 24 ) ); \
- \
- HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
- \
- _hj_key += 12; \
- _hj_k -= 12U; \
- } \
- hashv += (unsigned)(keylen); \
- switch ( _hj_k ) { \
- case 11: hashv += ( (unsigned)_hj_key[10] << 24 ); /* FALLTHROUGH */ \
- case 10: hashv += ( (unsigned)_hj_key[9] << 16 ); /* FALLTHROUGH */ \
- case 9: hashv += ( (unsigned)_hj_key[8] << 8 ); /* FALLTHROUGH */ \
- case 8: _hj_j += ( (unsigned)_hj_key[7] << 24 ); /* FALLTHROUGH */ \
- case 7: _hj_j += ( (unsigned)_hj_key[6] << 16 ); /* FALLTHROUGH */ \
- case 6: _hj_j += ( (unsigned)_hj_key[5] << 8 ); /* FALLTHROUGH */ \
- case 5: _hj_j += _hj_key[4]; /* FALLTHROUGH */ \
- case 4: _hj_i += ( (unsigned)_hj_key[3] << 24 ); /* FALLTHROUGH */ \
- case 3: _hj_i += ( (unsigned)_hj_key[2] << 16 ); /* FALLTHROUGH */ \
- case 2: _hj_i += ( (unsigned)_hj_key[1] << 8 ); /* FALLTHROUGH */ \
- case 1: _hj_i += _hj_key[0]; \
- } \
- HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
-} while (0)
-
-/* The Paul Hsieh hash function */
-#undef get16bits
-#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
- || defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
-#define get16bits(d) (*((const uint16_t *) (d)))
-#endif
-
-#if !defined (get16bits)
-#define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8) \
- +(uint32_t)(((const uint8_t *)(d))[0]) )
-#endif
-#define HASH_SFH(key,keylen,hashv) \
-do { \
- unsigned const char *_sfh_key=(unsigned const char*)(key); \
- uint32_t _sfh_tmp, _sfh_len = (uint32_t)keylen; \
- \
- unsigned _sfh_rem = _sfh_len & 3U; \
- _sfh_len >>= 2; \
- hashv = 0xcafebabeu; \
- \
- /* Main loop */ \
- for (;_sfh_len > 0U; _sfh_len--) { \
- hashv += get16bits (_sfh_key); \
- _sfh_tmp = ((uint32_t)(get16bits (_sfh_key+2)) << 11) ^ hashv; \
- hashv = (hashv << 16) ^ _sfh_tmp; \
- _sfh_key += 2U*sizeof (uint16_t); \
- hashv += hashv >> 11; \
- } \
- \
- /* Handle end cases */ \
- switch (_sfh_rem) { \
- case 3: hashv += get16bits (_sfh_key); \
- hashv ^= hashv << 16; \
- hashv ^= (uint32_t)(_sfh_key[sizeof (uint16_t)]) << 18; \
- hashv += hashv >> 11; \
- break; \
- case 2: hashv += get16bits (_sfh_key); \
- hashv ^= hashv << 11; \
- hashv += hashv >> 17; \
- break; \
- case 1: hashv += *_sfh_key; \
- hashv ^= hashv << 10; \
- hashv += hashv >> 1; \
- } \
- \
- /* Force "avalanching" of final 127 bits */ \
- hashv ^= hashv << 3; \
- hashv += hashv >> 5; \
- hashv ^= hashv << 4; \
- hashv += hashv >> 17; \
- hashv ^= hashv << 25; \
- hashv += hashv >> 6; \
-} while (0)
-
-#ifdef HASH_USING_NO_STRICT_ALIASING
-/* The MurmurHash exploits some CPU's (x86,x86_64) tolerance for unaligned reads.
- * For other types of CPU's (e.g. Sparc) an unaligned read causes a bus error.
- * MurmurHash uses the faster approach only on CPU's where we know it's safe.
- *
- * Note the preprocessor built-in defines can be emitted using:
- *
- * gcc -m64 -dM -E - < /dev/null (on gcc)
- * cc -## a.c (where a.c is a simple test file) (Sun Studio)
- */
-#if (defined(__i386__) || defined(__x86_64__) || defined(_M_IX86))
-#define MUR_GETBLOCK(p,i) p[i]
-#else /* non intel */
-#define MUR_PLUS0_ALIGNED(p) (((unsigned long)p & 3UL) == 0UL)
-#define MUR_PLUS1_ALIGNED(p) (((unsigned long)p & 3UL) == 1UL)
-#define MUR_PLUS2_ALIGNED(p) (((unsigned long)p & 3UL) == 2UL)
-#define MUR_PLUS3_ALIGNED(p) (((unsigned long)p & 3UL) == 3UL)
-#define WP(p) ((uint32_t*)((unsigned long)(p) & ~3UL))
-#if (defined(__BIG_ENDIAN__) || defined(SPARC) || defined(__ppc__) || defined(__ppc64__))
-#define MUR_THREE_ONE(p) ((((*WP(p))&0x00ffffff) << 8) | (((*(WP(p)+1))&0xff000000) >> 24))
-#define MUR_TWO_TWO(p) ((((*WP(p))&0x0000ffff) <<16) | (((*(WP(p)+1))&0xffff0000) >> 16))
-#define MUR_ONE_THREE(p) ((((*WP(p))&0x000000ff) <<24) | (((*(WP(p)+1))&0xffffff00) >> 8))
-#else /* assume little endian non-intel */
-#define MUR_THREE_ONE(p) ((((*WP(p))&0xffffff00) >> 8) | (((*(WP(p)+1))&0x000000ff) << 24))
-#define MUR_TWO_TWO(p) ((((*WP(p))&0xffff0000) >>16) | (((*(WP(p)+1))&0x0000ffff) << 16))
-#define MUR_ONE_THREE(p) ((((*WP(p))&0xff000000) >>24) | (((*(WP(p)+1))&0x00ffffff) << 8))
-#endif
-#define MUR_GETBLOCK(p,i) (MUR_PLUS0_ALIGNED(p) ? ((p)[i]) : \
- (MUR_PLUS1_ALIGNED(p) ? MUR_THREE_ONE(p) : \
- (MUR_PLUS2_ALIGNED(p) ? MUR_TWO_TWO(p) : \
- MUR_ONE_THREE(p))))
-#endif
-#define MUR_ROTL32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
-#define MUR_FMIX(_h) \
-do { \
- _h ^= _h >> 16; \
- _h *= 0x85ebca6bu; \
- _h ^= _h >> 13; \
- _h *= 0xc2b2ae35u; \
- _h ^= _h >> 16; \
-} while (0)
-
-#define HASH_MUR(key,keylen,hashv) \
-do { \
- const uint8_t *_mur_data = (const uint8_t*)(key); \
- const int _mur_nblocks = (int)(keylen) / 4; \
- uint32_t _mur_h1 = 0xf88D5353u; \
- uint32_t _mur_c1 = 0xcc9e2d51u; \
- uint32_t _mur_c2 = 0x1b873593u; \
- uint32_t _mur_k1 = 0; \
- const uint8_t *_mur_tail; \
- const uint32_t *_mur_blocks = (const uint32_t*)(_mur_data+(_mur_nblocks*4)); \
- int _mur_i; \
- for(_mur_i = -_mur_nblocks; _mur_i!=0; _mur_i++) { \
- _mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i); \
- _mur_k1 *= _mur_c1; \
- _mur_k1 = MUR_ROTL32(_mur_k1,15); \
- _mur_k1 *= _mur_c2; \
- \
- _mur_h1 ^= _mur_k1; \
- _mur_h1 = MUR_ROTL32(_mur_h1,13); \
- _mur_h1 = (_mur_h1*5U) + 0xe6546b64u; \
- } \
- _mur_tail = (const uint8_t*)(_mur_data + (_mur_nblocks*4)); \
- _mur_k1=0; \
- switch((keylen) & 3U) { \
- case 3: _mur_k1 ^= (uint32_t)_mur_tail[2] << 16; /* FALLTHROUGH */ \
- case 2: _mur_k1 ^= (uint32_t)_mur_tail[1] << 8; /* FALLTHROUGH */ \
- case 1: _mur_k1 ^= (uint32_t)_mur_tail[0]; \
- _mur_k1 *= _mur_c1; \
- _mur_k1 = MUR_ROTL32(_mur_k1,15); \
- _mur_k1 *= _mur_c2; \
- _mur_h1 ^= _mur_k1; \
- } \
- _mur_h1 ^= (uint32_t)(keylen); \
- MUR_FMIX(_mur_h1); \
- hashv = _mur_h1; \
-} while (0)
-#endif /* HASH_USING_NO_STRICT_ALIASING */
-
-/* iterate over items in a known bucket to find desired item */
-#define HASH_FIND_IN_BKT(tbl,hh,head,keyptr,keylen_in,hashval,out) \
-do { \
- if ((head).hh_head != NULL) { \
- DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (head).hh_head)); \
- } else { \
- (out) = NULL; \
- } \
- while ((out) != NULL) { \
- if ((out)->hh.hashv == (hashval) && (out)->hh.keylen == (keylen_in)) { \
- if (uthash_memcmp((out)->hh.key, keyptr, keylen_in) == 0) { \
- break; \
- } \
- } \
- if ((out)->hh.hh_next != NULL) { \
- DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (out)->hh.hh_next)); \
- } else { \
- (out) = NULL; \
- } \
- } \
-} while (0)
-
-/* add an item to a bucket */
-#define HASH_ADD_TO_BKT(head,addhh) \
-do { \
- head.count++; \
- (addhh)->hh_next = head.hh_head; \
- (addhh)->hh_prev = NULL; \
- if (head.hh_head != NULL) { (head).hh_head->hh_prev = (addhh); } \
- (head).hh_head=addhh; \
- if ((head.count >= ((head.expand_mult+1U) * HASH_BKT_CAPACITY_THRESH)) \
- && ((addhh)->tbl->noexpand != 1U)) { \
- HASH_EXPAND_BUCKETS((addhh)->tbl); \
- } \
-} while (0)
-
-/* remove an item from a given bucket */
-#define HASH_DEL_IN_BKT(hh,head,hh_del) \
- (head).count--; \
- if ((head).hh_head == hh_del) { \
- (head).hh_head = hh_del->hh_next; \
- } \
- if (hh_del->hh_prev) { \
- hh_del->hh_prev->hh_next = hh_del->hh_next; \
- } \
- if (hh_del->hh_next) { \
- hh_del->hh_next->hh_prev = hh_del->hh_prev; \
- }
-
-/* Bucket expansion has the effect of doubling the number of buckets
- * and redistributing the items into the new buckets. Ideally the
- * items will distribute more or less evenly into the new buckets
- * (the extent to which this is true is a measure of the quality of
- * the hash function as it applies to the key domain).
- *
- * With the items distributed into more buckets, the chain length
- * (item count) in each bucket is reduced. Thus by expanding buckets
- * the hash keeps a bound on the chain length. This bounded chain
- * length is the essence of how a hash provides constant time lookup.
- *
- * The calculation of tbl->ideal_chain_maxlen below deserves some
- * explanation. First, keep in mind that we're calculating the ideal
- * maximum chain length based on the *new* (doubled) bucket count.
- * In fractions this is just n/b (n=number of items,b=new num buckets).
- * Since the ideal chain length is an integer, we want to calculate
- * ceil(n/b). We don't depend on floating point arithmetic in this
- * hash, so to calculate ceil(n/b) with integers we could write
- *
- * ceil(n/b) = (n/b) + ((n%b)?1:0)
- *
- * and in fact a previous version of this hash did just that.
- * But now we have improved things a bit by recognizing that b is
- * always a power of two. We keep its base 2 log handy (call it lb),
- * so now we can write this with a bit shift and logical AND:
- *
- * ceil(n/b) = (n>>lb) + ( (n & (b-1)) ? 1:0)
- *
- */
-#define HASH_EXPAND_BUCKETS(tbl) \
-do { \
- unsigned _he_bkt; \
- unsigned _he_bkt_i; \
- struct UT_hash_handle *_he_thh, *_he_hh_nxt; \
- UT_hash_bucket *_he_new_buckets, *_he_newbkt; \
- _he_new_buckets = (UT_hash_bucket*)uthash_malloc( \
- 2UL * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
- if (!_he_new_buckets) { uthash_fatal( "out of memory"); } \
- memset(_he_new_buckets, 0, \
- 2UL * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
- tbl->ideal_chain_maxlen = \
- (tbl->num_items >> (tbl->log2_num_buckets+1U)) + \
- (((tbl->num_items & ((tbl->num_buckets*2U)-1U)) != 0U) ? 1U : 0U); \
- tbl->nonideal_items = 0; \
- for(_he_bkt_i = 0; _he_bkt_i < tbl->num_buckets; _he_bkt_i++) \
- { \
- _he_thh = tbl->buckets[ _he_bkt_i ].hh_head; \
- while (_he_thh != NULL) { \
- _he_hh_nxt = _he_thh->hh_next; \
- HASH_TO_BKT( _he_thh->hashv, tbl->num_buckets*2U, _he_bkt); \
- _he_newbkt = &(_he_new_buckets[ _he_bkt ]); \
- if (++(_he_newbkt->count) > tbl->ideal_chain_maxlen) { \
- tbl->nonideal_items++; \
- _he_newbkt->expand_mult = _he_newbkt->count / \
- tbl->ideal_chain_maxlen; \
- } \
- _he_thh->hh_prev = NULL; \
- _he_thh->hh_next = _he_newbkt->hh_head; \
- if (_he_newbkt->hh_head != NULL) { _he_newbkt->hh_head->hh_prev = \
- _he_thh; } \
- _he_newbkt->hh_head = _he_thh; \
- _he_thh = _he_hh_nxt; \
- } \
- } \
- uthash_free( tbl->buckets, tbl->num_buckets*sizeof(struct UT_hash_bucket) ); \
- tbl->num_buckets *= 2U; \
- tbl->log2_num_buckets++; \
- tbl->buckets = _he_new_buckets; \
- tbl->ineff_expands = (tbl->nonideal_items > (tbl->num_items >> 1)) ? \
- (tbl->ineff_expands+1U) : 0U; \
- if (tbl->ineff_expands > 1U) { \
- tbl->noexpand=1; \
- uthash_noexpand_fyi(tbl); \
- } \
- uthash_expand_fyi(tbl); \
-} while (0)
-
-
-/* This is an adaptation of Simon Tatham's O(n log(n)) mergesort */
-/* Note that HASH_SORT assumes the hash handle name to be hh.
- * HASH_SRT was added to allow the hash handle name to be passed in. */
-#define HASH_SORT(head,cmpfcn) HASH_SRT(hh,head,cmpfcn)
-#define HASH_SRT(hh,head,cmpfcn) \
-do { \
- unsigned _hs_i; \
- unsigned _hs_looping,_hs_nmerges,_hs_insize,_hs_psize,_hs_qsize; \
- struct UT_hash_handle *_hs_p, *_hs_q, *_hs_e, *_hs_list, *_hs_tail; \
- if (head != NULL) { \
- _hs_insize = 1; \
- _hs_looping = 1; \
- _hs_list = &((head)->hh); \
- while (_hs_looping != 0U) { \
- _hs_p = _hs_list; \
- _hs_list = NULL; \
- _hs_tail = NULL; \
- _hs_nmerges = 0; \
- while (_hs_p != NULL) { \
- _hs_nmerges++; \
- _hs_q = _hs_p; \
- _hs_psize = 0; \
- for ( _hs_i = 0; _hs_i < _hs_insize; _hs_i++ ) { \
- _hs_psize++; \
- _hs_q = (UT_hash_handle*)((_hs_q->next != NULL) ? \
- ((void*)((char*)(_hs_q->next) + \
- (head)->hh.tbl->hho)) : NULL); \
- if (! (_hs_q) ) { break; } \
- } \
- _hs_qsize = _hs_insize; \
- while ((_hs_psize > 0U) || ((_hs_qsize > 0U) && (_hs_q != NULL))) {\
- if (_hs_psize == 0U) { \
- _hs_e = _hs_q; \
- _hs_q = (UT_hash_handle*)((_hs_q->next != NULL) ? \
- ((void*)((char*)(_hs_q->next) + \
- (head)->hh.tbl->hho)) : NULL); \
- _hs_qsize--; \
- } else if ( (_hs_qsize == 0U) || (_hs_q == NULL) ) { \
- _hs_e = _hs_p; \
- if (_hs_p != NULL){ \
- _hs_p = (UT_hash_handle*)((_hs_p->next != NULL) ? \
- ((void*)((char*)(_hs_p->next) + \
- (head)->hh.tbl->hho)) : NULL); \
- } \
- _hs_psize--; \
- } else if (( \
- cmpfcn(DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_p)), \
- DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_q))) \
- ) <= 0) { \
- _hs_e = _hs_p; \
- if (_hs_p != NULL){ \
- _hs_p = (UT_hash_handle*)((_hs_p->next != NULL) ? \
- ((void*)((char*)(_hs_p->next) + \
- (head)->hh.tbl->hho)) : NULL); \
- } \
- _hs_psize--; \
- } else { \
- _hs_e = _hs_q; \
- _hs_q = (UT_hash_handle*)((_hs_q->next != NULL) ? \
- ((void*)((char*)(_hs_q->next) + \
- (head)->hh.tbl->hho)) : NULL); \
- _hs_qsize--; \
- } \
- if ( _hs_tail != NULL ) { \
- _hs_tail->next = ((_hs_e != NULL) ? \
- ELMT_FROM_HH((head)->hh.tbl,_hs_e) : NULL); \
- } else { \
- _hs_list = _hs_e; \
- } \
- if (_hs_e != NULL) { \
- _hs_e->prev = ((_hs_tail != NULL) ? \
- ELMT_FROM_HH((head)->hh.tbl,_hs_tail) : NULL); \
- } \
- _hs_tail = _hs_e; \
- } \
- _hs_p = _hs_q; \
- } \
- if (_hs_tail != NULL){ \
- _hs_tail->next = NULL; \
- } \
- if ( _hs_nmerges <= 1U ) { \
- _hs_looping=0; \
- (head)->hh.tbl->tail = _hs_tail; \
- DECLTYPE_ASSIGN(head,ELMT_FROM_HH((head)->hh.tbl, _hs_list)); \
- } \
- _hs_insize *= 2U; \
- } \
- HASH_FSCK(hh,head); \
- } \
-} while (0)
-
-/* This function selects items from one hash into another hash.
- * The end result is that the selected items have dual presence
- * in both hashes. There is no copy of the items made; rather
- * they are added into the new hash through a secondary hash
- * hash handle that must be present in the structure. */
-#define HASH_SELECT(hh_dst, dst, hh_src, src, cond) \
-do { \
- unsigned _src_bkt, _dst_bkt; \
- void *_last_elt=NULL, *_elt; \
- UT_hash_handle *_src_hh, *_dst_hh, *_last_elt_hh=NULL; \
- ptrdiff_t _dst_hho = ((char*)(&(dst)->hh_dst) - (char*)(dst)); \
- if (src != NULL) { \
- for(_src_bkt=0; _src_bkt < (src)->hh_src.tbl->num_buckets; _src_bkt++) { \
- for(_src_hh = (src)->hh_src.tbl->buckets[_src_bkt].hh_head; \
- _src_hh != NULL; \
- _src_hh = _src_hh->hh_next) { \
- _elt = ELMT_FROM_HH((src)->hh_src.tbl, _src_hh); \
- if (cond(_elt)) { \
- _dst_hh = (UT_hash_handle*)(((char*)_elt) + _dst_hho); \
- _dst_hh->key = _src_hh->key; \
- _dst_hh->keylen = _src_hh->keylen; \
- _dst_hh->hashv = _src_hh->hashv; \
- _dst_hh->prev = _last_elt; \
- _dst_hh->next = NULL; \
- if (_last_elt_hh != NULL) { _last_elt_hh->next = _elt; } \
- if (dst == NULL) { \
- DECLTYPE_ASSIGN(dst,_elt); \
- HASH_MAKE_TABLE(hh_dst,dst); \
- } else { \
- _dst_hh->tbl = (dst)->hh_dst.tbl; \
- } \
- HASH_TO_BKT(_dst_hh->hashv, _dst_hh->tbl->num_buckets, _dst_bkt); \
- HASH_ADD_TO_BKT(_dst_hh->tbl->buckets[_dst_bkt],_dst_hh); \
- (dst)->hh_dst.tbl->num_items++; \
- _last_elt = _elt; \
- _last_elt_hh = _dst_hh; \
- } \
- } \
- } \
- } \
- HASH_FSCK(hh_dst,dst); \
-} while (0)
-
-#define HASH_CLEAR(hh,head) \
-do { \
- if (head != NULL) { \
- uthash_free((head)->hh.tbl->buckets, \
- (head)->hh.tbl->num_buckets*sizeof(struct UT_hash_bucket)); \
- HASH_BLOOM_FREE((head)->hh.tbl); \
- uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
- (head)=NULL; \
- } \
-} while (0)
-
-#define HASH_OVERHEAD(hh,head) \
- ((head != NULL) ? ( \
- (size_t)(((head)->hh.tbl->num_items * sizeof(UT_hash_handle)) + \
- ((head)->hh.tbl->num_buckets * sizeof(UT_hash_bucket)) + \
- sizeof(UT_hash_table) + \
- (HASH_BLOOM_BYTELEN))) : 0U)
-
-#ifdef NO_DECLTYPE
-#define HASH_ITER(hh,head,el,tmp) \
-for(((el)=(head)), ((*(char**)(&(tmp)))=(char*)((head!=NULL)?(head)->hh.next:NULL)); \
- (el) != NULL; ((el)=(tmp)), ((*(char**)(&(tmp)))=(char*)((tmp!=NULL)?(tmp)->hh.next:NULL)))
-#else
-#define HASH_ITER(hh,head,el,tmp) \
-for(((el)=(head)), ((tmp)=DECLTYPE(el)((head!=NULL)?(head)->hh.next:NULL)); \
- (el) != NULL; ((el)=(tmp)), ((tmp)=DECLTYPE(el)((tmp!=NULL)?(tmp)->hh.next:NULL)))
-#endif
-
-/* obtain a count of items in the hash */
-#define HASH_COUNT(head) HASH_CNT(hh,head)
-#define HASH_CNT(hh,head) ((head != NULL)?((head)->hh.tbl->num_items):0U)
-
-typedef struct UT_hash_bucket {
- struct UT_hash_handle *hh_head;
- unsigned count;
-
- /* expand_mult is normally set to 0. In this situation, the max chain length
- * threshold is enforced at its default value, HASH_BKT_CAPACITY_THRESH. (If
- * the bucket's chain exceeds this length, bucket expansion is triggered).
- * However, setting expand_mult to a non-zero value delays bucket expansion
- * (that would be triggered by additions to this particular bucket)
- * until its chain length reaches a *multiple* of HASH_BKT_CAPACITY_THRESH.
- * (The multiplier is simply expand_mult+1). The whole idea of this
- * multiplier is to reduce bucket expansions, since they are expensive, in
- * situations where we know that a particular bucket tends to be overused.
- * It is better to let its chain length grow to a longer yet-still-bounded
- * value, than to do an O(n) bucket expansion too often.
- */
- unsigned expand_mult;
-
-} UT_hash_bucket;
-
-/* random signature used only to find hash tables in external analysis */
-#define HASH_SIGNATURE 0xa0111fe1u
-#define HASH_BLOOM_SIGNATURE 0xb12220f2u
-
-typedef struct UT_hash_table {
- UT_hash_bucket *buckets;
- unsigned num_buckets, log2_num_buckets;
- unsigned num_items;
- struct UT_hash_handle *tail; /* tail hh in app order, for fast append */
- ptrdiff_t hho; /* hash handle offset (byte pos of hash handle in element */
-
- /* in an ideal situation (all buckets used equally), no bucket would have
- * more than ceil(#items/#buckets) items. that's the ideal chain length. */
- unsigned ideal_chain_maxlen;
-
- /* nonideal_items is the number of items in the hash whose chain position
- * exceeds the ideal chain maxlen. these items pay the penalty for an uneven
- * hash distribution; reaching them in a chain traversal takes >ideal steps */
- unsigned nonideal_items;
-
- /* ineffective expands occur when a bucket doubling was performed, but
- * afterward, more than half the items in the hash had nonideal chain
- * positions. If this happens on two consecutive expansions we inhibit any
- * further expansion, as it's not helping; this happens when the hash
- * function isn't a good fit for the key domain. When expansion is inhibited
- * the hash will still work, albeit no longer in constant time. */
- unsigned ineff_expands, noexpand;
-
- uint32_t signature; /* used only to find hash tables in external analysis */
-#ifdef HASH_BLOOM
- uint32_t bloom_sig; /* used only to test bloom exists in external analysis */
- uint8_t *bloom_bv;
- uint8_t bloom_nbits;
-#endif
-
-} UT_hash_table;
-
-typedef struct UT_hash_handle {
- struct UT_hash_table *tbl;
- void *prev; /* prev element in app order */
- void *next; /* next element in app order */
- struct UT_hash_handle *hh_prev; /* previous hh in bucket order */
- struct UT_hash_handle *hh_next; /* next hh in bucket order */
- void *key; /* ptr to enclosing struct's key */
- unsigned keylen; /* enclosing struct's key len */
- unsigned hashv; /* result of hash-fcn(key) */
-} UT_hash_handle;
-
-#endif /* UTHASH_H */
--
2.12.1
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