+// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+// SPDX-FileCopyrightText: 2009 Paul E. McKenney, IBM Corporation.
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
/*
- * urcu-bp.c
- *
* Userspace RCU library, "bulletproof" version.
*
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
- *
- * This library 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 library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
* IBM's contributions to this file may be relicensed under LGPLv2 or later.
*/
#include <stdio.h>
#include <pthread.h>
#include <signal.h>
-#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#include <sys/mman.h>
+#include <urcu/annotate.h>
+#include <urcu/assert.h>
#include <urcu/config.h>
#include <urcu/arch.h>
#include <urcu/wfcqueue.h>
size_t new_size __attribute__((unused)),
int flags)
{
- assert(!(flags & MREMAP_MAYMOVE));
+ urcu_posix_assert(!(flags & MREMAP_MAYMOVE));
return MAP_FAILED;
}
static
void __attribute__((constructor)) _urcu_bp_init(void);
static
-void __attribute__((destructor)) urcu_bp_exit(void);
+void urcu_bp_exit(void);
+static
+void __attribute__((destructor)) urcu_bp_exit_destructor(void);
+static void urcu_call_rcu_exit(void);
#ifndef CONFIG_RCU_FORCE_SYS_MEMBARRIER
int urcu_bp_has_sys_membarrier;
*/
static void wait_for_readers(struct cds_list_head *input_readers,
struct cds_list_head *cur_snap_readers,
- struct cds_list_head *qsreaders)
+ struct cds_list_head *qsreaders,
+ cmm_annotate_t *group)
{
unsigned int wait_loops = 0;
struct urcu_bp_reader *index, *tmp;
wait_loops++;
cds_list_for_each_entry_safe(index, tmp, input_readers, node) {
- switch (urcu_bp_reader_state(&index->ctr)) {
+ switch (urcu_bp_reader_state(&index->ctr, group)) {
case URCU_BP_READER_ACTIVE_CURRENT:
if (cur_snap_readers) {
cds_list_move(&index->node,
void urcu_bp_synchronize_rcu(void)
{
+ cmm_annotate_define(acquire_group);
+ cmm_annotate_define(release_group);
CDS_LIST_HEAD(cur_snap_readers);
CDS_LIST_HEAD(qsreaders);
sigset_t newmask, oldmask;
int ret;
ret = sigfillset(&newmask);
- assert(!ret);
+ urcu_posix_assert(!ret);
ret = pthread_sigmask(SIG_BLOCK, &newmask, &oldmask);
- assert(!ret);
+ urcu_posix_assert(!ret);
mutex_lock(&rcu_gp_lock);
* where new ptr points to. */
/* Write new ptr before changing the qparity */
smp_mb_master();
+ cmm_annotate_group_mb_release(&release_group);
/*
* Wait for readers to observe original parity or be quiescent.
* wait_for_readers() can release and grab again rcu_registry_lock
* internally.
*/
- wait_for_readers(®istry, &cur_snap_readers, &qsreaders);
+ wait_for_readers(®istry, &cur_snap_readers, &qsreaders, &acquire_group);
/*
* Adding a cmm_smp_mb() which is _not_ formally required, but makes the
cmm_smp_mb();
/* Switch parity: 0 -> 1, 1 -> 0 */
- CMM_STORE_SHARED(rcu_gp.ctr, rcu_gp.ctr ^ URCU_BP_GP_CTR_PHASE);
+ cmm_annotate_group_mem_release(&release_group, &rcu_gp.ctr);
+ uatomic_store(&rcu_gp.ctr, rcu_gp.ctr ^ URCU_BP_GP_CTR_PHASE, CMM_RELAXED);
/*
* Must commit qparity update to memory before waiting for other parity
* wait_for_readers() can release and grab again rcu_registry_lock
* internally.
*/
- wait_for_readers(&cur_snap_readers, NULL, &qsreaders);
+ wait_for_readers(&cur_snap_readers, NULL, &qsreaders, &acquire_group);
/*
* Put quiescent reader list back into registry.
* freed.
*/
smp_mb_master();
+ cmm_annotate_group_mb_acquire(&acquire_group);
out:
mutex_unlock(&rcu_registry_lock);
mutex_unlock(&rcu_gp_lock);
ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
- assert(!ret);
+ urcu_posix_assert(!ret);
}
/*
/* No chunk. */
if (cds_list_empty(&arena->chunk_list)) {
- assert(ARENA_INIT_ALLOC >=
+ urcu_posix_assert(ARENA_INIT_ALLOC >=
sizeof(struct registry_chunk)
+ sizeof(struct rcu_reader));
new_chunk_len = ARENA_INIT_ALLOC;
new_chunk_len, 0);
if (new_chunk != MAP_FAILED) {
/* Should not have moved. */
- assert(new_chunk == last_chunk);
+ urcu_posix_assert(new_chunk == last_chunk);
memset((char *) last_chunk + old_chunk_len, 0,
new_chunk_len - old_chunk_len);
last_chunk->data_len =
/* Add to registry */
rcu_reader_reg->tid = pthread_self();
- assert(rcu_reader_reg->ctr == 0);
+ urcu_posix_assert(rcu_reader_reg->ctr == 0);
cds_list_add(&rcu_reader_reg->node, ®istry);
/*
* Reader threads are pointing to the reader registry. This is
mutex_unlock(&init_lock);
}
+static
+void urcu_bp_exit_destructor(void)
+{
+ urcu_call_rcu_exit();
+ urcu_bp_exit();
+}
+
/*
* Holding the rcu_gp_lock and rcu_registry_lock across fork will make
* sure we fork() don't race with a concurrent thread executing with
int ret;
ret = sigfillset(&newmask);
- assert(!ret);
+ urcu_posix_assert(!ret);
ret = pthread_sigmask(SIG_BLOCK, &newmask, &oldmask);
- assert(!ret);
+ urcu_posix_assert(!ret);
mutex_lock(&rcu_gp_lock);
mutex_lock(&rcu_registry_lock);
saved_fork_signal_mask = oldmask;
mutex_unlock(&rcu_registry_lock);
mutex_unlock(&rcu_gp_lock);
ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
- assert(!ret);
+ urcu_posix_assert(!ret);
}
/*
mutex_unlock(&rcu_registry_lock);
mutex_unlock(&rcu_gp_lock);
ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
- assert(!ret);
+ urcu_posix_assert(!ret);
}
void *urcu_bp_dereference_sym(void *p)
#include "urcu-call-rcu-impl.h"
#include "urcu-defer-impl.h"
+#include "urcu-poll-impl.h"
projects / urcu.git / blobdiff