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util: Fix race condition on libgcrypt initialization

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Fixes intermittent Vulkan CTS failures within the test groups:
dEQP-VK.api.object_management.multithreaded_per_thread_device
dEQP-VK.api.object_management.multithreaded_per_thread_resources
dEQP-VK.api.object_management.multithreaded_shared_resources

Signed-off-by: Mark Janes <mark.a.janes@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94904

Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Mark Janes
2016-04-12 11:52:53 -07:00
parent 2d5bd66e4f
commit ade3108bb5
1 changed files with 11 additions and 8 deletions
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src/util/mesa-sha1.c
+11 -8
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@@ -175,21 +175,24 @@ _mesa_sha1_final(struct mesa_sha1 *ctx, unsigned char result[20])
#elif defined(HAVE_SHA1_IN_LIBGCRYPT) /* Use libgcrypt for SHA1 */
#include <gcrypt.h>
#include "c11/threads.h"
static void _mesa_libgcrypt_init(void)
{
if (!gcry_check_version(NULL))
return NULL;
gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
}
struct mesa_sha1 *
_mesa_sha1_init(void)
{
static int init;
static once_flag flag = ONCE_FLAG_INIT;
gcry_md_hd_t h;
gcry_error_t err;
if (!init) {
if (!gcry_check_version(NULL))
return NULL;
gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
init = 1;
}
call_once(&flag, _mesa_libgcrypt_init);
err = gcry_md_open(&h, GCRY_MD_SHA1, 0);
if (err)