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author | Nikos Mavrogiannopoulos <nmav@redhat.com> | 2017-07-21 11:43:27 +0200 |
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committer | Nikos Mavrogiannopoulos <nmav@gnutls.org> | 2017-07-25 07:00:50 +0000 |
commit | c3584fde92d29b0d9c3f62b5073edfe795dfbd39 (patch) | |
tree | a244e526a992fa702f1ca052521238c7c0b354df | |
parent | 4ec47cb8e4f678caa42772aa902808496c595952 (diff) | |
download | gnutls-c3584fde92d29b0d9c3f62b5073edfe795dfbd39.tar.gz |
Introduced atomic.h to simplify handling of atomic integers
Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
-rw-r--r-- | lib/Makefile.am | 2 | ||||
-rw-r--r-- | lib/atomic.h | 81 |
2 files changed, 82 insertions, 1 deletions
diff --git a/lib/Makefile.am b/lib/Makefile.am index 9fb2347588..9e22bb92cf 100644 --- a/lib/Makefile.am +++ b/lib/Makefile.am @@ -70,7 +70,7 @@ COBJECTS = range.c record.c compress.c debug.c cipher.c \ priority.c hash_int.c cipher_int.c session.c db.c x509_b64.c \ extensions.c auth.c sslv2_compat.c datum.c session_pack.c mpi.c \ pk.c cert.c global.c constate.c anon_cred.c pkix_asn1_tab.c gnutls_asn1_tab.c \ - mem.c fingerprint.c tls-sig.c ecc.c alert.c privkey_raw.c \ + mem.c fingerprint.c tls-sig.c ecc.c alert.c privkey_raw.c atomic.h \ system/certs.c system/threads.c system/fastopen.c system/sockets.c \ system/inet_ntop.c str-iconv.c system/vasprintf.c vasprintf.h system.c \ str.c str-unicode.c str-idna.c state.c x509.c file.c supplemental.c \ diff --git a/lib/atomic.h b/lib/atomic.h new file mode 100644 index 0000000000..3e943a81b8 --- /dev/null +++ b/lib/atomic.h @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2017 Red Hat, Inc. + * + * Author: Nikos Mavrogiannopoulos + * + * This file is part of GnuTLS. + * + * The GnuTLS is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/> + * + */ + +#ifndef GNUTLS_ATOMIC_H +#define GNUTLS_ATOMIC_H + +#ifdef HAVE_STDATOMIC_H +# include <stdatomic.h> + +# define gnutls_atomic_uint_t atomic_uint +# define DEF_ATOMIC_INT(x) atomic_uint x +# define gnutls_atomic_increment(x) (*x)++ +# define gnutls_atomic_decrement(x) (*x)-- +# define gnutls_atomic_init(x) (*x)=(0) +# define gnutls_atomic_deinit(x) +# define gnutls_atomic_val(x) (*x) +#else +# include "locks.h" + +struct gnutls_atomic_uint_st { + void *lock; + unsigned int value; +}; +typedef struct gnutls_atomic_uint_st *gnutls_atomic_uint_t; + +# define DEF_ATOMIC_INT(x) struct gnutls_atomic_uint_st x + +inline static unsigned gnutls_atomic_val(gnutls_atomic_uint_t x) +{ + unsigned int t; + gnutls_mutex_lock(x->lock); + t = x->value; + gnutls_mutex_unlock(x->lock); + return t; +} + +inline static void gnutls_atomic_increment(gnutls_atomic_uint_t x) +{ + gnutls_mutex_lock(x->lock); + x->value++; + gnutls_mutex_unlock(x->lock); +} + +inline static void gnutls_atomic_decrement(gnutls_atomic_uint_t x) +{ + gnutls_mutex_lock(x->lock); + x->value--; + gnutls_mutex_unlock(x->lock); +} + +inline static void gnutls_atomic_init(gnutls_atomic_uint_t x) +{ + gnutls_mutex_init(&x->lock); + x->value = 0; +} +inline static void gnutls_atomic_deinit(gnutls_atomic_uint_t x) +{ + gnutls_mutex_deinit(&x->lock); +} +#endif + +#endif |