From 95d78c7e7c81a6b788f28c33ef2cafd87471a0d7 Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Mon, 22 Sep 2014 12:05:16 +0200 Subject: util: add alloca_align() The alloca_align() helper is the alloca() equivalent of posix_memalign(). As there is no such function provided by glibc, we simply account for additional memory and return a pointer offset into the allocated memory to grant the alignment. Furthermore, alloca0_align() is added, which simply clears the allocated memory. --- src/test/test-util.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'src/test') diff --git a/src/test/test-util.c b/src/test/test-util.c index f8e42f3a55..1311184815 100644 --- a/src/test/test-util.c +++ b/src/test/test-util.c @@ -131,6 +131,19 @@ static void test_container_of(void) { v1) == &myval); } +static void test_alloca(void) { + static const uint8_t zero[997] = { }; + char *t; + + t = alloca_align(17, 512); + assert_se(!((uintptr_t)t & 0xff)); + memzero(t, 17); + + t = alloca0_align(997, 1024); + assert_se(!((uintptr_t)t & 0x1ff)); + assert_se(!memcmp(t, zero, 997)); +} + static void test_first_word(void) { assert_se(first_word("Hello", "")); assert_se(first_word("Hello", "Hello")); @@ -1272,6 +1285,7 @@ int main(int argc, char *argv[]) { test_align_power2(); test_max(); test_container_of(); + test_alloca(); test_first_word(); test_close_many(); test_parse_boolean(); -- cgit v1.2.3-54-g00ecf