C11 aligned_alloc() implementation

aligned_alloc() is implemented in terms of posix_memalign() which is
only declared in <stdlib.h> but not defined in Newlib in general.  At
least Linux and RTEMS implement this function.

newlib/ChangeLog
2015-10-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>

	* libc/stdlib/Makefile.am (GENERAL_SOURCES): Add
	alloc_aligned.c.c.
	* libc/stdlib/Makefile.in: Regenerate.
	* libc/stdlib/aligned_alloc.c: New.

4 files changed, 70 insertions, 18 deletions

diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index d0d357e..6c9c6e2 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,5 +1,11 @@
 2015-10-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
+	* libc/stdlib/Makefile.am (GENERAL_SOURCES): Add alloc_aligned.c.c.
+	* libc/stdlib/Makefile.in: Regenerate.
+	* libc/stdlib/aligned_alloc.c: New.
+
+2015-10-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>
+
 	* libc/include/stdlib.h (alloc_aligned): Declare.
 
 2015-10-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>
diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index 5c0e142..ead5dd1 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -13,6 +13,7 @@ GENERAL_SOURCES = \
 	_Exit.c		\
 	abort.c  	\
 	abs.c 		\
+	aligned_alloc.c	\
 	assert.c  	\
 	atexit.c	\
 	atof.c 		\
diff --git a/newlib/libc/stdlib/Makefile.in b/newlib/libc/stdlib/Makefile.in
index f1f9e3b..5f21688 100644
--- a/newlib/libc/stdlib/Makefile.in
+++ b/newlib/libc/stdlib/Makefile.in
@@ -85,16 +85,17 @@ am__objects_2 = lib_a-__adjust.$(OBJEXT) lib_a-__atexit.$(OBJEXT) \
 	lib_a-__call_atexit.$(OBJEXT) lib_a-__exp10.$(OBJEXT) \
 	lib_a-__ten_mu.$(OBJEXT) lib_a-_Exit.$(OBJEXT) \
 	lib_a-abort.$(OBJEXT) lib_a-abs.$(OBJEXT) \
-	lib_a-assert.$(OBJEXT) lib_a-atexit.$(OBJEXT) \
-	lib_a-atof.$(OBJEXT) lib_a-atoff.$(OBJEXT) \
-	lib_a-atoi.$(OBJEXT) lib_a-atol.$(OBJEXT) \
-	lib_a-calloc.$(OBJEXT) lib_a-div.$(OBJEXT) \
-	lib_a-dtoa.$(OBJEXT) lib_a-dtoastub.$(OBJEXT) \
-	lib_a-environ.$(OBJEXT) lib_a-envlock.$(OBJEXT) \
-	lib_a-eprintf.$(OBJEXT) lib_a-exit.$(OBJEXT) \
-	lib_a-gdtoa-gethex.$(OBJEXT) lib_a-gdtoa-hexnan.$(OBJEXT) \
-	lib_a-getenv.$(OBJEXT) lib_a-getenv_r.$(OBJEXT) \
-	lib_a-itoa.$(OBJEXT) lib_a-labs.$(OBJEXT) lib_a-ldiv.$(OBJEXT) \
+	lib_a-aligned_alloc.$(OBJEXT) lib_a-assert.$(OBJEXT) \
+	lib_a-atexit.$(OBJEXT) lib_a-atof.$(OBJEXT) \
+	lib_a-atoff.$(OBJEXT) lib_a-atoi.$(OBJEXT) \
+	lib_a-atol.$(OBJEXT) lib_a-calloc.$(OBJEXT) \
+	lib_a-div.$(OBJEXT) lib_a-dtoa.$(OBJEXT) \
+	lib_a-dtoastub.$(OBJEXT) lib_a-environ.$(OBJEXT) \
+	lib_a-envlock.$(OBJEXT) lib_a-eprintf.$(OBJEXT) \
+	lib_a-exit.$(OBJEXT) lib_a-gdtoa-gethex.$(OBJEXT) \
+	lib_a-gdtoa-hexnan.$(OBJEXT) lib_a-getenv.$(OBJEXT) \
+	lib_a-getenv_r.$(OBJEXT) lib_a-itoa.$(OBJEXT) \
+	lib_a-labs.$(OBJEXT) lib_a-ldiv.$(OBJEXT) \
 	lib_a-ldtoa.$(OBJEXT) lib_a-malloc.$(OBJEXT) \
 	lib_a-mblen.$(OBJEXT) lib_a-mblen_r.$(OBJEXT) \
 	lib_a-mbstowcs.$(OBJEXT) lib_a-mbstowcs_r.$(OBJEXT) \
@@ -149,11 +150,11 @@ lib_a_OBJECTS = $(am_lib_a_OBJECTS)
 LTLIBRARIES = $(noinst_LTLIBRARIES)
 @HAVE_LONG_DOUBLE_TRUE@am__objects_8 = strtold.lo wcstold.lo
 am__objects_9 = __adjust.lo __atexit.lo __call_atexit.lo __exp10.lo \
-	__ten_mu.lo _Exit.lo abort.lo abs.lo assert.lo atexit.lo \
-	atof.lo atoff.lo atoi.lo atol.lo calloc.lo div.lo dtoa.lo \
-	dtoastub.lo environ.lo envlock.lo eprintf.lo exit.lo \
-	gdtoa-gethex.lo gdtoa-hexnan.lo getenv.lo getenv_r.lo itoa.lo \
-	labs.lo ldiv.lo ldtoa.lo malloc.lo mblen.lo mblen_r.lo \
+	__ten_mu.lo _Exit.lo abort.lo abs.lo aligned_alloc.lo \
+	assert.lo atexit.lo atof.lo atoff.lo atoi.lo atol.lo calloc.lo \
+	div.lo dtoa.lo dtoastub.lo environ.lo envlock.lo eprintf.lo \
+	exit.lo gdtoa-gethex.lo gdtoa-hexnan.lo getenv.lo getenv_r.lo \
+	itoa.lo labs.lo ldiv.lo ldtoa.lo malloc.lo mblen.lo mblen_r.lo \
 	mbstowcs.lo mbstowcs_r.lo mbtowc.lo mbtowc_r.lo mlock.lo \
 	mprec.lo mstats.lo quick_exit.lo rand.lo rand_r.lo realloc.lo \
 	reallocf.lo sb_charsets.lo strtod.lo strtol.lo strtoul.lo \
@@ -353,9 +354,9 @@ top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = cygnus
 INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
 GENERAL_SOURCES = __adjust.c __atexit.c __call_atexit.c __exp10.c \
-	__ten_mu.c _Exit.c abort.c abs.c assert.c atexit.c atof.c \
-	atoff.c atoi.c atol.c calloc.c div.c dtoa.c dtoastub.c \
-	environ.c envlock.c eprintf.c exit.c gdtoa-gethex.c \
+	__ten_mu.c _Exit.c abort.c abs.c aligned_alloc.c assert.c \
+	atexit.c atof.c atoff.c atoi.c atol.c calloc.c div.c dtoa.c \
+	dtoastub.c environ.c envlock.c eprintf.c exit.c gdtoa-gethex.c \
 	gdtoa-hexnan.c getenv.c getenv_r.c itoa.c labs.c ldiv.c \
 	ldtoa.c malloc.c mblen.c mblen_r.c mbstowcs.c mbstowcs_r.c \
 	mbtowc.c mbtowc_r.c mlock.c mprec.c mstats.c quick_exit.c \
@@ -648,6 +649,12 @@ lib_a-abs.o: abs.c
 lib_a-abs.obj: abs.c
 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-abs.obj `if test -f 'abs.c'; then $(CYGPATH_W) 'abs.c'; else $(CYGPATH_W) '$(srcdir)/abs.c'; fi`
 
+lib_a-aligned_alloc.o: aligned_alloc.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-aligned_alloc.o `test -f 'aligned_alloc.c' || echo '$(srcdir)/'`aligned_alloc.c
+
+lib_a-aligned_alloc.obj: aligned_alloc.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-aligned_alloc.obj `if test -f 'aligned_alloc.c'; then $(CYGPATH_W) 'aligned_alloc.c'; else $(CYGPATH_W) '$(srcdir)/aligned_alloc.c'; fi`
+
 lib_a-assert.o: assert.c
 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-assert.o `test -f 'assert.c' || echo '$(srcdir)/'`assert.c
 
diff --git a/newlib/libc/stdlib/aligned_alloc.c b/newlib/libc/stdlib/aligned_alloc.c
new file mode 100644
index 0000000..88413ce
--- /dev/null
+++ b/newlib/libc/stdlib/aligned_alloc.c
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 2015 embedded brains GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <stdlib.h>
+
+void *
+aligned_alloc(size_t alignment, size_t size)
+{
+	void *p;
+	int error;
+
+	error = posix_memalign(&p, alignment, size);
+
+	return (error == 0 ? p : NULL);
+}