util: Move the open-addressing linear-probing hash_table to src/util.

This hash table is used in core Mesa, the GLSL compiler, and the i965
driver, which makes it a good candidate for the new src/util module.

It's much faster than program/hash_table.[ch] (see commit 6991c2922f5
for data), and José's u_hash_table.c has a comment saying Gallium should
probably consider switching to a linear probing hash table at some point.
So this seems like the best candidate for a shared data structure.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

v2 (Jason Ekstrand): Pick up another hash_table use and patch up scons

Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

13 files changed, 729 insertions, 0 deletions

diff --git a/src/util/tests/Makefile.am b/src/util/tests/Makefile.am
index a2b5498..8ec8c3a 100644
--- a/src/util/tests/Makefile.am
+++ b/src/util/tests/Makefile.am
@@ -19,6 +19,8 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 # IN THE SOFTWARE.
 
+SUBDIRS = hash_table
+
 AM_CFLAGS = \
 	$(PTHREAD_CFLAGS)
 AM_CPPFLAGS = \
diff --git a/src/util/tests/hash_table/.gitignore b/src/util/tests/hash_table/.gitignore
new file mode 100644
index 0000000..1b9aaf4
--- /dev/null
+++ b/src/util/tests/hash_table/.gitignore
@@ -0,0 +1,10 @@
+collision
+delete_and_lookup
+delete_management
+destroy_callback
+insert_and_lookup
+insert_many
+null_destroy
+random_entry
+remove_null
+replacement
diff --git a/src/util/tests/hash_table/Makefile.am b/src/util/tests/hash_table/Makefile.am
new file mode 100644
index 0000000..55cc0b7
--- /dev/null
+++ b/src/util/tests/hash_table/Makefile.am
@@ -0,0 +1,46 @@
+# Copyright © 2009 Intel Corporation
+#
+#  Permission is hereby granted, free of charge, to any person obtaining a
+#  copy of this software and associated documentation files (the "Software"),
+#  to deal in the Software without restriction, including without limitation
+#  on the rights to use, copy, modify, merge, publish, distribute, sub
+#  license, and/or sell copies of the Software, and to permit persons to whom
+#  the Software is furnished to do so, subject to the following conditions:
+#
+#  The above copyright notice and this permission notice (including the next
+#  paragraph) shall be included in all copies or substantial portions of the
+#  Software.
+#
+#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+#  ADAM JACKSON BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+#  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+#  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/include \
+	-I$(top_srcdir)/src/util \
+	-I$(top_srcdir)/src/mesa \
+	-I$(top_srcdir)/src/mesa/main \
+	$(DEFINES) $(INCLUDE_DIRS)
+
+LDADD = \
+	$(top_builddir)/src/mesa/libmesa.la \
+	$(PTHREAD_LIBS) \
+	$(DLOPEN_LIBS)
+
+TESTS = \
+	collision \
+	delete_and_lookup \
+	delete_management \
+	destroy_callback \
+	insert_and_lookup \
+	insert_many \
+	null_destroy \
+	random_entry \
+	remove_null \
+	replacement \
+	$()
+
+EXTRA_PROGRAMS = $(TESTS)
diff --git a/src/util/tests/hash_table/collision.c b/src/util/tests/hash_table/collision.c
new file mode 100644
index 0000000..9174c39
--- /dev/null
+++ b/src/util/tests/hash_table/collision.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   const char *str1 = "test1";
+   const char *str2 = "test2";
+   struct hash_entry *entry1, *entry2;
+   uint32_t bad_hash = 5;
+   int i;
+
+   ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+   _mesa_hash_table_insert(ht, bad_hash, str1, NULL);
+   _mesa_hash_table_insert(ht, bad_hash, str2, NULL);
+
+   entry1 = _mesa_hash_table_search(ht, bad_hash, str1);
+   assert(entry1->key == str1);
+
+   entry2 = _mesa_hash_table_search(ht, bad_hash, str2);
+   assert(entry2->key == str2);
+
+   /* Check that we can still find #1 after inserting #2 */
+   entry1 = _mesa_hash_table_search(ht, bad_hash, str1);
+   assert(entry1->key == str1);
+
+   /* Remove the collided entry and look again. */
+   _mesa_hash_table_remove(ht, entry1);
+   entry2 = _mesa_hash_table_search(ht, bad_hash, str2);
+   assert(entry2->key == str2);
+
+   /* Put str1 back, then spam junk into the table to force a
+    * resize and make sure we can still find them both.
+    */
+   _mesa_hash_table_insert(ht, bad_hash, str1, NULL);
+   for (i = 0; i < 100; i++) {
+      char *key = malloc(10);
+      sprintf(key, "spam%d", i);
+      _mesa_hash_table_insert(ht, _mesa_hash_string(key), key, NULL);
+   }
+   entry1 = _mesa_hash_table_search(ht, bad_hash, str1);
+   assert(entry1->key == str1);
+   entry2 = _mesa_hash_table_search(ht, bad_hash, str2);
+   assert(entry2->key == str2);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/delete_and_lookup.c b/src/util/tests/hash_table/delete_and_lookup.c
new file mode 100644
index 0000000..fc886ff
--- /dev/null
+++ b/src/util/tests/hash_table/delete_and_lookup.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+/* Return collisions, so we can test the deletion behavior for chained
+ * objects.
+ */
+static uint32_t
+badhash(const void *key)
+{
+	return 1;
+}
+
+int
+main(int argc, char **argv)
+{
+	struct hash_table *ht;
+	const char *str1 = "test1";
+	const char *str2 = "test2";
+	uint32_t hash_str1 = badhash(str1);
+	uint32_t hash_str2 = badhash(str2);
+	struct hash_entry *entry;
+
+	ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+	_mesa_hash_table_insert(ht, hash_str1, str1, NULL);
+	_mesa_hash_table_insert(ht, hash_str2, str2, NULL);
+
+	entry = _mesa_hash_table_search(ht, hash_str2, str2);
+	assert(strcmp(entry->key, str2) == 0);
+
+	entry = _mesa_hash_table_search(ht, hash_str1, str1);
+	assert(strcmp(entry->key, str1) == 0);
+
+	_mesa_hash_table_remove(ht, entry);
+
+	entry = _mesa_hash_table_search(ht, hash_str1, str1);
+	assert(entry == NULL);
+
+	entry = _mesa_hash_table_search(ht, hash_str2, str2);
+	assert(strcmp(entry->key, str2) == 0);
+
+	_mesa_hash_table_destroy(ht, NULL);
+
+	return 0;
+}
diff --git a/src/util/tests/hash_table/delete_management.c b/src/util/tests/hash_table/delete_management.c
new file mode 100644
index 0000000..b8d7640
--- /dev/null
+++ b/src/util/tests/hash_table/delete_management.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+static uint32_t
+key_value(const void *key)
+{
+   return *(const uint32_t *)key;
+}
+
+static bool
+uint32_t_key_equals(const void *a, const void *b)
+{
+   return key_value(a) == key_value(b);
+}
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   struct hash_entry *entry;
+   int size = 10000;
+   uint32_t keys[size];
+   uint32_t i;
+
+   ht = _mesa_hash_table_create(NULL, uint32_t_key_equals);
+
+   for (i = 0; i < size; i++) {
+      keys[i] = i;
+
+      _mesa_hash_table_insert(ht, i, keys + i, NULL);
+
+      if (i >= 100) {
+         uint32_t delete_value = i - 100;
+         entry = _mesa_hash_table_search(ht, delete_value,
+                                              &delete_value);
+         _mesa_hash_table_remove(ht, entry);
+      }
+   }
+
+   /* Make sure that all our entries were present at the end. */
+   for (i = size - 100; i < size; i++) {
+      entry = _mesa_hash_table_search(ht, i, keys + i);
+      assert(entry);
+      assert(key_value(entry->key) == i);
+   }
+
+   /* Make sure that no extra entries got in */
+   for (entry = _mesa_hash_table_next_entry(ht, NULL);
+        entry != NULL;
+        entry = _mesa_hash_table_next_entry(ht, entry)) {
+      assert(key_value(entry->key) >= size - 100 &&
+             key_value(entry->key) < size);
+   }
+   assert(ht->entries == 100);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/destroy_callback.c b/src/util/tests/hash_table/destroy_callback.c
new file mode 100644
index 0000000..dce2b33
--- /dev/null
+++ b/src/util/tests/hash_table/destroy_callback.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+static const char *str1 = "test1";
+static const char *str2 = "test2";
+static int delete_str1 = 0;
+static int delete_str2 = 0;
+
+static void
+delete_callback(struct hash_entry *entry)
+{
+   if (strcmp(entry->key, str1) == 0)
+      delete_str1 = 1;
+   else if (strcmp(entry->key, str2) == 0)
+      delete_str2 = 1;
+   else
+      abort();
+}
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   uint32_t hash_str1 = _mesa_hash_string(str1);
+   uint32_t hash_str2 = _mesa_hash_string(str2);
+
+   ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+   _mesa_hash_table_insert(ht, hash_str1, str1, NULL);
+   _mesa_hash_table_insert(ht, hash_str2, str2, NULL);
+
+   _mesa_hash_table_destroy(ht, delete_callback);
+
+   assert(delete_str1 && delete_str2);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/insert_and_lookup.c b/src/util/tests/hash_table/insert_and_lookup.c
new file mode 100644
index 0000000..402f3fd
--- /dev/null
+++ b/src/util/tests/hash_table/insert_and_lookup.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   const char *str1 = "test1";
+   const char *str2 = "test2";
+   uint32_t hash_str1 = _mesa_hash_string(str1);
+   uint32_t hash_str2 = _mesa_hash_string(str2);
+   struct hash_entry *entry;
+
+   ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+   _mesa_hash_table_insert(ht, hash_str1, str1, NULL);
+   _mesa_hash_table_insert(ht, hash_str2, str2, NULL);
+
+   entry = _mesa_hash_table_search(ht, hash_str1, str1);
+   assert(strcmp(entry->key, str1) == 0);
+
+   entry = _mesa_hash_table_search(ht, hash_str2, str2);
+   assert(strcmp(entry->key, str2) == 0);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/insert_many.c b/src/util/tests/hash_table/insert_many.c
new file mode 100644
index 0000000..b2122dc
--- /dev/null
+++ b/src/util/tests/hash_table/insert_many.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+static uint32_t
+key_value(const void *key)
+{
+   return *(const uint32_t *)key;
+}
+
+static bool
+uint32_t_key_equals(const void *a, const void *b)
+{
+   return key_value(a) == key_value(b);
+}
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   struct hash_entry *entry;
+   int size = 10000;
+   uint32_t keys[size];
+   uint32_t i;
+
+   ht = _mesa_hash_table_create(NULL, uint32_t_key_equals);
+
+   for (i = 0; i < size; i++) {
+      keys[i] = i;
+
+      _mesa_hash_table_insert(ht, i, keys + i, NULL);
+   }
+
+   for (i = 0; i < size; i++) {
+      entry = _mesa_hash_table_search(ht, i, keys + i);
+      assert(entry);
+      assert(key_value(entry->key) == i);
+   }
+   assert(ht->entries == size);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/null_destroy.c b/src/util/tests/hash_table/null_destroy.c
new file mode 100644
index 0000000..3833464
--- /dev/null
+++ b/src/util/tests/hash_table/null_destroy.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "hash_table.h"
+
+int
+main(int argc, char **argv)
+{
+   _mesa_hash_table_destroy(NULL, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/random_entry.c b/src/util/tests/hash_table/random_entry.c
new file mode 100644
index 0000000..22cafa7
--- /dev/null
+++ b/src/util/tests/hash_table/random_entry.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+static uint32_t
+key_value(const void *key)
+{
+   return *(const uint32_t *)key;
+}
+
+static bool
+uint32_t_key_equals(const void *a, const void *b)
+{
+   return key_value(a) == key_value(b);
+}
+
+static bool
+uint32_t_key_is_even(struct hash_entry *entry)
+{
+   return (key_value(entry->key) & 1) == 0;
+}
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   struct hash_entry *entry;
+   int size = 10000;
+   uint32_t keys[size];
+   uint32_t i, random_value;
+
+   ht = _mesa_hash_table_create(NULL, uint32_t_key_equals);
+
+   for (i = 0; i < size; i++) {
+      keys[i] = i;
+
+      _mesa_hash_table_insert(ht, i, keys + i, NULL);
+   }
+
+   /* Test the no-predicate case. */
+   entry = _mesa_hash_table_random_entry(ht, NULL);
+   assert(entry);
+
+   /* Check that we're getting different entries and that the predicate
+    * works.
+    */
+   for (i = 0; i < 100; i++) {
+      entry = _mesa_hash_table_random_entry(ht, uint32_t_key_is_even);
+      assert(entry);
+      assert((key_value(entry->key) & 1) == 0);
+      if (i == 0 || key_value(entry->key) != random_value)
+         break;
+      random_value = key_value(entry->key);
+   }
+   assert(i != 100);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/remove_null.c b/src/util/tests/hash_table/remove_null.c
new file mode 100644
index 0000000..90fb784
--- /dev/null
+++ b/src/util/tests/hash_table/remove_null.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+
+   ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+   _mesa_hash_table_remove(ht, NULL);
+
+   _mesa_hash_table_destroy(ht, NULL);
+
+   return 0;
+}
diff --git a/src/util/tests/hash_table/replacement.c b/src/util/tests/hash_table/replacement.c
new file mode 100644
index 0000000..387cfc0
--- /dev/null
+++ b/src/util/tests/hash_table/replacement.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "hash_table.h"
+
+int
+main(int argc, char **argv)
+{
+   struct hash_table *ht;
+   char *str1 = strdup("test1");
+   char *str2 = strdup("test1");
+   uint32_t hash_str1 = _mesa_hash_string(str1);
+   uint32_t hash_str2 = _mesa_hash_string(str2);
+   struct hash_entry *entry;
+
+   assert(str1 != str2);
+
+   ht = _mesa_hash_table_create(NULL, _mesa_key_string_equal);
+
+   _mesa_hash_table_insert(ht, hash_str1, str1, str1);
+   _mesa_hash_table_insert(ht, hash_str2, str2, str2);
+
+   entry = _mesa_hash_table_search(ht, hash_str1, str1);
+   assert(entry);
+   assert(entry->data == str2);
+
+   _mesa_hash_table_remove(ht, entry);
+
+   entry = _mesa_hash_table_search(ht, hash_str1, str1);
+   assert(!entry);
+
+   _mesa_hash_table_destroy(ht, NULL);
+   free(str1);
+   free(str2);
+
+   return 0;
+}