posix_memalign: Add tests.

* tests/test-posix_memalign.c: New file.
* modules/posix_memalign-tests: New file.

3 files changed, 119 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index fd72d3e850..e4f606ef3b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2020-11-03  Bruno Haible  <bruno@clisp.org>
 
+	posix_memalign: Add tests.
+	* tests/test-posix_memalign.c: New file.
+	* modules/posix_memalign-tests: New file.
+
 	posix_memalign: New module.
 	* lib/stdlib.in.h (posix_memalign): New declaration.
 	* lib/posix_memalign.c: New file.
diff --git a/modules/posix_memalign-tests b/modules/posix_memalign-tests
new file mode 100644
index 0000000000..5136dab9e2
--- /dev/null
+++ b/modules/posix_memalign-tests
@@ -0,0 +1,12 @@
+Files:
+tests/test-posix_memalign.c
+tests/macros.h
+
+Depends-on:
+stdint
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-posix_memalign
+check_PROGRAMS += test-posix_memalign
diff --git a/tests/test-posix_memalign.c b/tests/test-posix_memalign.c
new file mode 100644
index 0000000000..a5dc652828
--- /dev/null
+++ b/tests/test-posix_memalign.c
@@ -0,0 +1,103 @@
+/* Test of allocating memory with given alignment.
+
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+#if HAVE_POSIX_MEMALIGN
+  static size_t sizes[] =
+    { 13, 8, 17, 450, 320, 1, 99, 4, 15, 16, 2, 76, 37, 127, 2406, 641, 5781 };
+  void *aligned2_blocks[SIZEOF (sizes)];
+  void *aligned4_blocks[SIZEOF (sizes)];
+  void *aligned8_blocks[SIZEOF (sizes)];
+  void *aligned16_blocks[SIZEOF (sizes)];
+  void *aligned32_blocks[SIZEOF (sizes)];
+  void *aligned64_blocks[SIZEOF (sizes)];
+  size_t i;
+
+  for (i = 0; i < SIZEOF (sizes); i++)
+    {
+      size_t size = sizes[i];
+
+      if (sizeof (void *) <= 2)
+        {
+          ASSERT (posix_memalign (&aligned2_blocks[i], 2, size) == 0);
+          ASSERT (aligned2_blocks[i] != NULL);
+          ASSERT (((uintptr_t) aligned2_blocks[i] % 2) == 0);
+          memset (aligned2_blocks[i], 'u', size);
+        }
+
+      if (sizeof (void *) <= 4)
+        {
+          ASSERT (posix_memalign (&aligned4_blocks[i], 4, size) == 0);
+          ASSERT (aligned4_blocks[i] != NULL);
+          ASSERT (((uintptr_t) aligned4_blocks[i] % 4) == 0);
+          memset (aligned4_blocks[i], 'v', size);
+        }
+
+      ASSERT (posix_memalign (&aligned8_blocks[i], 8, size) == 0);
+      ASSERT (aligned8_blocks[i] != NULL);
+      ASSERT (((uintptr_t) aligned8_blocks[i] % 8) == 0);
+      memset (aligned8_blocks[i], 'w', size);
+
+      ASSERT (posix_memalign (&aligned16_blocks[i], 16, size) == 0);
+      ASSERT (aligned16_blocks[i] != NULL);
+      ASSERT (((uintptr_t) aligned16_blocks[i] % 16) == 0);
+      memset (aligned16_blocks[i], 'x', size);
+
+      ASSERT (posix_memalign (&aligned32_blocks[i], 32, size) == 0);
+      ASSERT (aligned32_blocks[i] != NULL);
+      ASSERT (((uintptr_t) aligned32_blocks[i] % 32) == 0);
+      memset (aligned32_blocks[i], 'y', size);
+
+      ASSERT (posix_memalign (&aligned64_blocks[i], 64, size) == 0);
+      ASSERT (aligned64_blocks[i] != NULL);
+      ASSERT (((uintptr_t) aligned64_blocks[i] % 64) == 0);
+      memset (aligned64_blocks[i], 'z', size);
+    }
+
+  for (i = 0; i < SIZEOF (sizes); i++)
+    {
+      if (sizeof (void *) <= 2)
+        free (aligned2_blocks[i]);
+      if (sizeof (void *) <= 4)
+        free (aligned4_blocks[i]);
+      free (aligned8_blocks[i]);
+      free (aligned16_blocks[i]);
+      free (aligned32_blocks[i]);
+      free (aligned64_blocks[i]);
+    }
+
+  return 0;
+#else
+  fputs ("Skipping test: function 'aligned_alloc' does not exist\n", stderr);
+  return 77;
+#endif
+}