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authorChris Wilson <chris@chris-wilson.co.uk>2016-09-22 14:44:50 +0100
committerChris Wilson <chris@chris-wilson.co.uk>2016-10-22 09:32:54 +0100
commit9e24d0c54b162b443e3e144740deb0e1d5f8760b (patch)
treec073704460fd30a0c9b41c7f12a411c02f500d93 /intel
parent455e9b491723b89b19b6efc6590fc9c5558f7858 (diff)
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intel: Migrate handle/name lookups from linear lists to hashtables
Walking a linear list to find a matching PRIME handle or flinked name does not scale and becomes a major burden with just a few objects. That said, the fixed size hash is not much better, it just buckets the look into a few separate chains rather than one long one. References: https://bugs.freedesktop.org/show_bug.cgi?id=94631 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'intel')
-rw-r--r--intel/intel_bufmgr_gem.c208
-rw-r--r--intel/uthash.h1074
2 files changed, 1181 insertions, 101 deletions
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 0f212e96..3028da5e 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -64,6 +64,7 @@
#include "string.h"
#include "i915_drm.h"
+#include "uthash.h"
#ifdef HAVE_VALGRIND
#include <valgrind.h>
@@ -130,7 +131,9 @@ typedef struct _drm_intel_bufmgr_gem {
drmMMListHead managers;
- drmMMListHead named;
+ drm_intel_bo_gem *name_table;
+ drm_intel_bo_gem *handle_table;
+
drmMMListHead vma_cache;
int vma_count, vma_open, vma_max;
@@ -175,7 +178,9 @@ struct _drm_intel_bo_gem {
* List contains both flink named and prime fd'd objects
*/
unsigned int global_name;
- drmMMListHead name_list;
+
+ UT_hash_handle handle_hh;
+ UT_hash_handle name_hh;
/**
* Index of the buffer within the validation list while preparing a
@@ -799,14 +804,17 @@ retry:
}
}
}
- pthread_mutex_unlock(&bufmgr_gem->lock);
if (!alloc_from_cache) {
struct drm_i915_gem_create create;
bo_gem = calloc(1, sizeof(*bo_gem));
if (!bo_gem)
- return NULL;
+ goto err;
+
+ /* drm_intel_gem_bo_free calls DRMLISTDEL() for an uninitialized
+ list (vma_list), so better set the list head here */
+ DRMINITLISTHEAD(&bo_gem->vma_list);
bo_gem->bo.size = bo_size;
@@ -816,12 +824,13 @@ retry:
ret = drmIoctl(bufmgr_gem->fd,
DRM_IOCTL_I915_GEM_CREATE,
&create);
- bo_gem->gem_handle = create.handle;
- bo_gem->bo.handle = bo_gem->gem_handle;
if (ret != 0) {
free(bo_gem);
- return NULL;
+ goto err;
}
+
+ bo_gem->gem_handle = create.handle;
+ bo_gem->bo.handle = bo_gem->gem_handle;
bo_gem->bo.bufmgr = bufmgr;
bo_gem->bo.align = alignment;
@@ -829,16 +838,14 @@ retry:
bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
bo_gem->stride = 0;
- /* drm_intel_gem_bo_free calls DRMLISTDEL() for an uninitialized
- list (vma_list), so better set the list head here */
- DRMINITLISTHEAD(&bo_gem->name_list);
- DRMINITLISTHEAD(&bo_gem->vma_list);
if (drm_intel_gem_bo_set_tiling_internal(&bo_gem->bo,
tiling_mode,
- stride)) {
- drm_intel_gem_bo_free(&bo_gem->bo);
- return NULL;
- }
+ stride))
+ goto err_free;
+
+ HASH_ADD(handle_hh, bufmgr_gem->handle_table,
+ gem_handle, sizeof(bo_gem->gem_handle),
+ bo_gem);
}
bo_gem->name = name;
@@ -851,11 +858,18 @@ retry:
bo_gem->use_48b_address_range = false;
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, alignment);
+ pthread_mutex_unlock(&bufmgr_gem->lock);
DBG("bo_create: buf %d (%s) %ldb\n",
bo_gem->gem_handle, bo_gem->name, size);
return &bo_gem->bo;
+
+err_free:
+ drm_intel_gem_bo_free(&bo_gem->bo);
+err:
+ pthread_mutex_unlock(&bufmgr_gem->lock);
+ return NULL;
}
static drm_intel_bo *
@@ -956,6 +970,9 @@ drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
if (!bo_gem)
return NULL;
+ atomic_set(&bo_gem->refcount, 1);
+ DRMINITLISTHEAD(&bo_gem->vma_list);
+
bo_gem->bo.size = size;
memclear(userptr);
@@ -974,6 +991,8 @@ drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
return NULL;
}
+ pthread_mutex_lock(&bufmgr_gem->lock);
+
bo_gem->gem_handle = userptr.handle;
bo_gem->bo.handle = bo_gem->gem_handle;
bo_gem->bo.bufmgr = bufmgr;
@@ -985,11 +1004,11 @@ drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
bo_gem->stride = 0;
- DRMINITLISTHEAD(&bo_gem->name_list);
- DRMINITLISTHEAD(&bo_gem->vma_list);
+ HASH_ADD(handle_hh, bufmgr_gem->handle_table,
+ gem_handle, sizeof(bo_gem->gem_handle),
+ bo_gem);
bo_gem->name = name;
- atomic_set(&bo_gem->refcount, 1);
bo_gem->validate_index = -1;
bo_gem->reloc_tree_fences = 0;
bo_gem->used_as_reloc_target = false;
@@ -998,6 +1017,7 @@ drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
bo_gem->use_48b_address_range = false;
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0);
+ pthread_mutex_unlock(&bufmgr_gem->lock);
DBG("bo_create_userptr: "
"ptr %p buf %d (%s) size %ldb, stride 0x%x, tile mode %d\n",
@@ -1087,7 +1107,6 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
int ret;
struct drm_gem_open open_arg;
struct drm_i915_gem_get_tiling get_tiling;
- drmMMListHead *list;
/* At the moment most applications only have a few named bo.
* For instance, in a DRI client only the render buffers passed
@@ -1096,15 +1115,11 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
* provides a sufficiently fast match.
*/
pthread_mutex_lock(&bufmgr_gem->lock);
- for (list = bufmgr_gem->named.next;
- list != &bufmgr_gem->named;
- list = list->next) {
- bo_gem = DRMLISTENTRY(drm_intel_bo_gem, list, name_list);
- if (bo_gem->global_name == handle) {
- drm_intel_gem_bo_reference(&bo_gem->bo);
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return &bo_gem->bo;
- }
+ HASH_FIND(name_hh, bufmgr_gem->name_table,
+ &handle, sizeof(handle), bo_gem);
+ if (bo_gem) {
+ drm_intel_gem_bo_reference(&bo_gem->bo);
+ goto out;
}
memclear(open_arg);
@@ -1115,29 +1130,26 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
if (ret != 0) {
DBG("Couldn't reference %s handle 0x%08x: %s\n",
name, handle, strerror(errno));
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return NULL;
+ bo_gem = NULL;
+ goto out;
}
/* Now see if someone has used a prime handle to get this
* object from the kernel before by looking through the list
* again for a matching gem_handle
*/
- for (list = bufmgr_gem->named.next;
- list != &bufmgr_gem->named;
- list = list->next) {
- bo_gem = DRMLISTENTRY(drm_intel_bo_gem, list, name_list);
- if (bo_gem->gem_handle == open_arg.handle) {
- drm_intel_gem_bo_reference(&bo_gem->bo);
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return &bo_gem->bo;
- }
+ HASH_FIND(handle_hh, bufmgr_gem->handle_table,
+ &open_arg.handle, sizeof(open_arg.handle), bo_gem);
+ if (bo_gem) {
+ drm_intel_gem_bo_reference(&bo_gem->bo);
+ goto out;
}
bo_gem = calloc(1, sizeof(*bo_gem));
- if (!bo_gem) {
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return NULL;
- }
+ if (!bo_gem)
+ goto out;
+
+ atomic_set(&bo_gem->refcount, 1);
+ DRMINITLISTHEAD(&bo_gem->vma_list);
bo_gem->bo.size = open_arg.size;
bo_gem->bo.offset = 0;
@@ -1145,7 +1157,6 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
bo_gem->bo.virtual = NULL;
bo_gem->bo.bufmgr = bufmgr;
bo_gem->name = name;
- atomic_set(&bo_gem->refcount, 1);
bo_gem->validate_index = -1;
bo_gem->gem_handle = open_arg.handle;
bo_gem->bo.handle = open_arg.handle;
@@ -1153,27 +1164,33 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
bo_gem->reusable = false;
bo_gem->use_48b_address_range = false;
+ HASH_ADD(handle_hh, bufmgr_gem->handle_table,
+ gem_handle, sizeof(bo_gem->gem_handle), bo_gem);
+ HASH_ADD(name_hh, bufmgr_gem->name_table,
+ global_name, sizeof(bo_gem->global_name), bo_gem);
+
memclear(get_tiling);
get_tiling.handle = bo_gem->gem_handle;
ret = drmIoctl(bufmgr_gem->fd,
DRM_IOCTL_I915_GEM_GET_TILING,
&get_tiling);
- if (ret != 0) {
- drm_intel_gem_bo_unreference(&bo_gem->bo);
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return NULL;
- }
+ if (ret != 0)
+ goto err_unref;
+
bo_gem->tiling_mode = get_tiling.tiling_mode;
bo_gem->swizzle_mode = get_tiling.swizzle_mode;
/* XXX stride is unknown */
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0);
-
- DRMINITLISTHEAD(&bo_gem->vma_list);
- DRMLISTADDTAIL(&bo_gem->name_list, &bufmgr_gem->named);
- pthread_mutex_unlock(&bufmgr_gem->lock);
DBG("bo_create_from_handle: %d (%s)\n", handle, bo_gem->name);
+out:
+ pthread_mutex_unlock(&bufmgr_gem->lock);
return &bo_gem->bo;
+
+err_unref:
+ drm_intel_gem_bo_free(&bo_gem->bo);
+ pthread_mutex_unlock(&bufmgr_gem->lock);
+ return NULL;
}
static void
@@ -1200,6 +1217,10 @@ drm_intel_gem_bo_free(drm_intel_bo *bo)
bufmgr_gem->vma_count--;
}
+ if (bo_gem->global_name)
+ HASH_DELETE(name_hh, bufmgr_gem->name_table, bo_gem);
+ HASH_DELETE(handle_hh, bufmgr_gem->handle_table, bo_gem);
+
/* Close this object */
memclear(close);
close.handle = bo_gem->gem_handle;
@@ -1377,8 +1398,6 @@ drm_intel_gem_bo_unreference_final(drm_intel_bo *bo, time_t time)
drm_intel_gem_bo_mark_mmaps_incoherent(bo);
}
- DRMLISTDEL(&bo_gem->name_list);
-
bucket = drm_intel_gem_bo_bucket_for_size(bufmgr_gem, bo->size);
/* Put the buffer into our internal cache for reuse if we can. */
if (bufmgr_gem->bo_reuse && bo_gem->reusable && bucket != NULL &&
@@ -2610,7 +2629,6 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s
uint32_t handle;
drm_intel_bo_gem *bo_gem;
struct drm_i915_gem_get_tiling get_tiling;
- drmMMListHead *list;
pthread_mutex_lock(&bufmgr_gem->lock);
ret = drmPrimeFDToHandle(bufmgr_gem->fd, prime_fd, &handle);
@@ -2625,22 +2643,20 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s
* for named buffers, we must not create two bo's pointing at the same
* kernel object
*/
- for (list = bufmgr_gem->named.next;
- list != &bufmgr_gem->named;
- list = list->next) {
- bo_gem = DRMLISTENTRY(drm_intel_bo_gem, list, name_list);
- if (bo_gem->gem_handle == handle) {
- drm_intel_gem_bo_reference(&bo_gem->bo);
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return &bo_gem->bo;
- }
+ HASH_FIND(name_hh, bufmgr_gem->name_table,
+ &handle, sizeof(handle), bo_gem);
+ if (bo_gem) {
+ drm_intel_gem_bo_reference(&bo_gem->bo);
+ goto out;
}
bo_gem = calloc(1, sizeof(*bo_gem));
- if (!bo_gem) {
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return NULL;
- }
+ if (!bo_gem)
+ goto out;
+
+ atomic_set(&bo_gem->refcount, 1);
+ DRMINITLISTHEAD(&bo_gem->vma_list);
+
/* Determine size of bo. The fd-to-handle ioctl really should
* return the size, but it doesn't. If we have kernel 3.12 or
* later, we can lseek on the prime fd to get the size. Older
@@ -2656,8 +2672,8 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s
bo_gem->bo.bufmgr = bufmgr;
bo_gem->gem_handle = handle;
-
- atomic_set(&bo_gem->refcount, 1);
+ HASH_ADD(handle_hh, bufmgr_gem->handle_table,
+ gem_handle, sizeof(bo_gem->gem_handle), bo_gem);
bo_gem->name = "prime";
bo_gem->validate_index = -1;
@@ -2667,26 +2683,26 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s
bo_gem->reusable = false;
bo_gem->use_48b_address_range = false;
- DRMINITLISTHEAD(&bo_gem->vma_list);
- DRMLISTADDTAIL(&bo_gem->name_list, &bufmgr_gem->named);
- pthread_mutex_unlock(&bufmgr_gem->lock);
-
memclear(get_tiling);
get_tiling.handle = bo_gem->gem_handle;
- ret = drmIoctl(bufmgr_gem->fd,
- DRM_IOCTL_I915_GEM_GET_TILING,
- &get_tiling);
- if (ret != 0) {
- DBG("create_from_prime: failed to get tiling: %s\n", strerror(errno));
- drm_intel_gem_bo_unreference(&bo_gem->bo);
- return NULL;
- }
+ if (drmIoctl(bufmgr_gem->fd,
+ DRM_IOCTL_I915_GEM_GET_TILING,
+ &get_tiling))
+ goto err;
+
bo_gem->tiling_mode = get_tiling.tiling_mode;
bo_gem->swizzle_mode = get_tiling.swizzle_mode;
/* XXX stride is unknown */
drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0);
+out:
+ pthread_mutex_unlock(&bufmgr_gem->lock);
return &bo_gem->bo;
+
+err:
+ drm_intel_gem_bo_free(&bo_gem->bo);
+ pthread_mutex_unlock(&bufmgr_gem->lock);
+ return NULL;
}
int
@@ -2695,11 +2711,6 @@ drm_intel_bo_gem_export_to_prime(drm_intel_bo *bo, int *prime_fd)
drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
- pthread_mutex_lock(&bufmgr_gem->lock);
- if (DRMLISTEMPTY(&bo_gem->name_list))
- DRMLISTADDTAIL(&bo_gem->name_list, &bufmgr_gem->named);
- pthread_mutex_unlock(&bufmgr_gem->lock);
-
if (drmPrimeHandleToFD(bufmgr_gem->fd, bo_gem->gem_handle,
DRM_CLOEXEC, prime_fd) != 0)
return -errno;
@@ -2714,27 +2725,23 @@ drm_intel_gem_bo_flink(drm_intel_bo *bo, uint32_t * name)
{
drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
- int ret;
if (!bo_gem->global_name) {
struct drm_gem_flink flink;
memclear(flink);
flink.handle = bo_gem->gem_handle;
+ if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_FLINK, &flink))
+ return -errno;
pthread_mutex_lock(&bufmgr_gem->lock);
-
- ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_FLINK, &flink);
- if (ret != 0) {
- pthread_mutex_unlock(&bufmgr_gem->lock);
- return -errno;
+ if (!bo_gem->global_name) {
+ HASH_ADD(name_hh, bufmgr_gem->name_table,
+ global_name, sizeof(bo_gem->global_name),
+ bo_gem);
+ bo_gem->global_name = flink.name;
+ bo_gem->reusable = false;
}
-
- bo_gem->global_name = flink.name;
- bo_gem->reusable = false;
-
- if (DRMLISTEMPTY(&bo_gem->name_list))
- DRMLISTADDTAIL(&bo_gem->name_list, &bufmgr_gem->named);
pthread_mutex_unlock(&bufmgr_gem->lock);
}
@@ -3691,7 +3698,6 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
drm_intel_gem_get_pipe_from_crtc_id;
bufmgr_gem->bufmgr.bo_references = drm_intel_gem_bo_references;
- DRMINITLISTHEAD(&bufmgr_gem->named);
init_cache_buckets(bufmgr_gem);
DRMINITLISTHEAD(&bufmgr_gem->vma_cache);
diff --git a/intel/uthash.h b/intel/uthash.h
new file mode 100644
index 00000000..45d1f9fc
--- /dev/null
+++ b/intel/uthash.h
@@ -0,0 +1,1074 @@
+/*
+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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 14:08:04 +0000