X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-hash-helper.h;h=bddc7c46729228d39e75d22cc578b67cd6ea1f64;hb=HEAD;hp=0df5f288b584882663c15530704af34c2d96c40c;hpb=b4051ad8c170901d5297e1b3005b24e63cb0ab1e;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-hash-helper.h b/liblttng-ust/lttng-hash-helper.h
deleted file mode 100644
index 0df5f288..00000000
--- a/liblttng-ust/lttng-hash-helper.h
+++ /dev/null
@@ -1,161 +0,0 @@
-#ifndef _LTTNG_HASH_HELPER_H
-#define _LTTNG_HASH_HELPER_H
-
-/*
- * lttng-hash-helper.h
- *
- * LTTng hash table helpers.
- *
- * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <urcu/compiler.h>
-
-/*
- * Hash function
- * Source: http://burtleburtle.net/bob/c/lookup3.c
- * Originally Public Domain
- */
-
-#define rot(x, k) (((x) << (k)) | ((x) >> (32 - (k))))
-
-#define mix(a, b, c) \
-do { \
-	a -= c; a ^= rot(c,  4); c += b; \
-	b -= a; b ^= rot(a,  6); a += c; \
-	c -= b; c ^= rot(b,  8); b += a; \
-	a -= c; a ^= rot(c, 16); c += b; \
-	b -= a; b ^= rot(a, 19); a += c; \
-	c -= b; c ^= rot(b,  4); b += a; \
-} while (0)
-
-#define final(a, b, c) \
-{ \
-	c ^= b; c -= rot(b, 14); \
-	a ^= c; a -= rot(c, 11); \
-	b ^= a; b -= rot(a, 25); \
-	c ^= b; c -= rot(b, 16); \
-	a ^= c; a -= rot(c,  4);\
-	b ^= a; b -= rot(a, 14); \
-	c ^= b; c -= rot(b, 24); \
-}
-
-static inline __attribute__((unused))
-uint32_t lttng_hash_u32(
-	const uint32_t *k,	/* the key, an array of uint32_t values */
-	size_t length,		/* the length of the key, in uint32_ts */
-	uint32_t initval)	/* the previous hash, or an arbitrary value */
-{
-	uint32_t a, b, c;
-
-	/* Set up the internal state */
-	a = b = c = 0xdeadbeef + (((uint32_t) length) << 2) + initval;
-
-	/*----------------------------------------- handle most of the key */
-	while (length > 3) {
-		a += k[0];
-		b += k[1];
-		c += k[2];
-		mix(a, b, c);
-		length -= 3;
-		k += 3;
-	}
-
-	/*----------------------------------- handle the last 3 uint32_t's */
-	switch (length) {	/* all the case statements fall through */
-	case 3: c += k[2];
-	case 2: b += k[1];
-	case 1: a += k[0];
-		final(a, b, c);
-	case 0:			/* case 0: nothing left to add */
-		break;
-	}
-	/*---------------------------------------------- report the result */
-	return c;
-}
-
-static inline
-void lttng_hashword2(
-	const uint32_t *k,	/* the key, an array of uint32_t values */
-	size_t length,		/* the length of the key, in uint32_ts */
-	uint32_t *pc,		/* IN: seed OUT: primary hash value */
-	uint32_t *pb)		/* IN: more seed OUT: secondary hash value */
-{
-	uint32_t a, b, c;
-
-	/* Set up the internal state */
-	a = b = c = 0xdeadbeef + ((uint32_t) (length << 2)) + *pc;
-	c += *pb;
-
-	/*----------------------------------------- handle most of the key */
-	while (length > 3) {
-		a += k[0];
-		b += k[1];
-		c += k[2];
-		mix(a, b, c);
-		length -= 3;
-		k += 3;
-	}
-
-	/*----------------------------------- handle the last 3 uint32_t's */
-	switch (length) {	/* all the case statements fall through */
-	case 3: c += k[2];
-	case 2: b += k[1];
-	case 1: a += k[0];
-		final(a, b, c);
-	case 0:			/* case 0: nothing left to add */
-		break;
-	}
-	/*---------------------------------------------- report the result */
-	*pc = c;
-	*pb = b;
-}
-
-#if (CAA_BITS_PER_LONG == 32)
-static inline
-unsigned long lttng_hash_mix(const void *_key, size_t length, unsigned long seed)
-{
-	unsigned int key = (unsigned int) _key;
-
-	assert(length == sizeof(unsigned int));
-	return lttng_hash_u32(&key, 1, seed);
-}
-#else
-static inline
-unsigned long lttng_hash_mix(const void *_key, size_t length, unsigned long seed)
-{
-	union {
-		uint64_t v64;
-		uint32_t v32[2];
-	} v;
-	union {
-		uint64_t v64;
-		uint32_t v32[2];
-	} key;
-
-	assert(length == sizeof(unsigned long));
-	v.v64 = (uint64_t) seed;
-	key.v64 = (uint64_t) _key;
-	lttng_hashword2(key.v32, 2, &v.v32[0], &v.v32[1]);
-	return v.v64;
-}
-#endif
-
-#endif /* _LTTNG_HASH_HELPER_H */