X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Furcu-bp.c;h=de1e40f4f4232afd23ab8b916df0aa11f29701e7;hb=acdb82a20ba20467b89c67aa44ca03da610513a9;hp=0653f9dff769b89281d5ec2edf4608d5604edbdf;hpb=ce28e67a534dcf0b68ccad2218e5a2e552e6e469;p=urcu.git

diff --git a/src/urcu-bp.c b/src/urcu-bp.c
index 0653f9d..de1e40f 100644
--- a/src/urcu-bp.c
+++ b/src/urcu-bp.c
@@ -1,33 +1,19 @@
+// 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.
  */
 
+#define URCU_NO_COMPAT_IDENTIFIERS
 #define _LGPL_SOURCE
 #include <stdio.h>
 #include <pthread.h>
 #include <signal.h>
-#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -36,6 +22,8 @@
 #include <stdbool.h>
 #include <sys/mman.h>
 
+#include <urcu/assert.h>
+#include <urcu/config.h>
 #include <urcu/arch.h>
 #include <urcu/wfcqueue.h>
 #include <urcu/map/urcu-bp.h>
@@ -73,10 +61,12 @@ void *mremap_wrapper(void *old_address, size_t old_size,
  * This is not generic.
 */
 static
-void *mremap_wrapper(void *old_address, size_t old_size,
-		size_t new_size, int flags)
+void *mremap_wrapper(void *old_address __attribute__((unused)),
+		size_t old_size __attribute__((unused)),
+		size_t new_size __attribute__((unused)),
+		int flags)
 {
-	assert(!(flags & MREMAP_MAYMOVE));
+	urcu_posix_assert(!(flags & MREMAP_MAYMOVE));
 
 	return MAP_FAILED;
 }
@@ -116,7 +106,10 @@ enum membarrier_cmd {
 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;
@@ -144,15 +137,12 @@ static int initialized;
 static pthread_key_t urcu_bp_key;
 
 struct urcu_bp_gp urcu_bp_gp = { .ctr = URCU_BP_GP_COUNT };
-URCU_ATTR_ALIAS("urcu_bp_gp") extern struct urcu_bp_gp rcu_gp_bp;
 
 /*
  * Pointer to registry elements. Written to only by each individual reader. Read
  * by both the reader and the writers.
  */
 DEFINE_URCU_TLS(struct urcu_bp_reader *, urcu_bp_reader);
-URCU_ATTR_ALIAS("urcu_bp_reader")
-extern struct urcu_bp_reader *rcu_reader_bp;
 
 static CDS_LIST_HEAD(registry);
 
@@ -276,9 +266,9 @@ void urcu_bp_synchronize_rcu(void)
 	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);
 
@@ -295,7 +285,7 @@ void urcu_bp_synchronize_rcu(void)
 	/*
 	 * Wait for readers to observe original parity or be quiescent.
 	 * wait_for_readers() can release and grab again rcu_registry_lock
-	 * interally.
+	 * internally.
 	 */
 	wait_for_readers(&registry, &cur_snap_readers, &qsreaders);
 
@@ -326,7 +316,7 @@ void urcu_bp_synchronize_rcu(void)
 	/*
 	 * Wait for readers to observe new parity or be quiescent.
 	 * wait_for_readers() can release and grab again rcu_registry_lock
-	 * interally.
+	 * internally.
 	 */
 	wait_for_readers(&cur_snap_readers, NULL, &qsreaders);
 
@@ -344,9 +334,8 @@ out:
 	mutex_unlock(&rcu_registry_lock);
 	mutex_unlock(&rcu_gp_lock);
 	ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
-	assert(!ret);
+	urcu_posix_assert(!ret);
 }
-URCU_ATTR_ALIAS("urcu_bp_synchronize_rcu") void synchronize_rcu_bp();
 
 /*
  * library wrappers to be used by non-LGPL compatible source code.
@@ -356,19 +345,16 @@ void urcu_bp_read_lock(void)
 {
 	_urcu_bp_read_lock();
 }
-URCU_ATTR_ALIAS("urcu_bp_read_lock") void rcu_read_lock_bp();
 
 void urcu_bp_read_unlock(void)
 {
 	_urcu_bp_read_unlock();
 }
-URCU_ATTR_ALIAS("urcu_bp_read_unlock") void rcu_read_unlock_bp();
 
 int urcu_bp_read_ongoing(void)
 {
 	return _urcu_bp_read_ongoing();
 }
-URCU_ATTR_ALIAS("urcu_bp_read_ongoing") int rcu_read_ongoing_bp();
 
 /*
  * Only grow for now. If empty, allocate a ARENA_INIT_ALLOC sized chunk.
@@ -386,7 +372,7 @@ void expand_arena(struct registry_arena *arena)
 
 	/* 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;
@@ -416,7 +402,7 @@ void expand_arena(struct registry_arena *arena)
 		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 =
@@ -487,7 +473,7 @@ void add_thread(void)
 
 	/* 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, &registry);
 	/*
 	 * Reader threads are pointing to the reader registry. This is
@@ -564,7 +550,12 @@ end:
 	if (ret)
 		abort();
 }
-URCU_ATTR_ALIAS("urcu_bp_register") void rcu_bp_register();
+
+void urcu_bp_register_thread(void)
+{
+	if (caa_unlikely(!URCU_TLS(urcu_bp_reader)))
+		urcu_bp_register(); /* If not yet registered. */
+}
 
 /* Disable signals, take mutex, remove from registry */
 static
@@ -671,6 +662,13 @@ void urcu_bp_exit(void)
 	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
@@ -683,14 +681,13 @@ void urcu_bp_before_fork(void)
 	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;
 }
-URCU_ATTR_ALIAS("urcu_bp_before_fork") void rcu_bp_before_fork();
 
 void urcu_bp_after_fork_parent(void)
 {
@@ -701,10 +698,8 @@ void urcu_bp_after_fork_parent(void)
 	mutex_unlock(&rcu_registry_lock);
 	mutex_unlock(&rcu_gp_lock);
 	ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
-	assert(!ret);
+	urcu_posix_assert(!ret);
 }
-URCU_ATTR_ALIAS("urcu_bp_after_fork_parent")
-void rcu_bp_after_fork_parent(void);
 
 /*
  * Prune all entries from registry except our own thread. Fits the Linux
@@ -739,17 +734,13 @@ void urcu_bp_after_fork_child(void)
 	mutex_unlock(&rcu_registry_lock);
 	mutex_unlock(&rcu_gp_lock);
 	ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
-	assert(!ret);
+	urcu_posix_assert(!ret);
 }
-URCU_ATTR_ALIAS("urcu_bp_after_fork_child")
-void rcu_bp_after_fork_child(void);
 
 void *urcu_bp_dereference_sym(void *p)
 {
 	return _rcu_dereference(p);
 }
-URCU_ATTR_ALIAS("urcu_bp_dereference_sym")
-void *rcu_dereference_sym_bp();
 
 void *urcu_bp_set_pointer_sym(void **p, void *v)
 {
@@ -757,27 +748,21 @@ void *urcu_bp_set_pointer_sym(void **p, void *v)
 	uatomic_set(p, v);
 	return v;
 }
-URCU_ATTR_ALIAS("urcu_bp_set_pointer_sym")
-void *rcu_set_pointer_sym_bp();
 
 void *urcu_bp_xchg_pointer_sym(void **p, void *v)
 {
 	cmm_wmb();
 	return uatomic_xchg(p, v);
 }
-URCU_ATTR_ALIAS("urcu_bp_xchg_pointer_sym")
-void *rcu_xchg_pointer_sym_bp();
 
 void *urcu_bp_cmpxchg_pointer_sym(void **p, void *old, void *_new)
 {
 	cmm_wmb();
 	return uatomic_cmpxchg(p, old, _new);
 }
-URCU_ATTR_ALIAS("urcu_bp_cmpxchg_pointer_sym")
-void *rcu_cmpxchg_pointer_sym_bp();
 
 DEFINE_RCU_FLAVOR(rcu_flavor);
-DEFINE_RCU_FLAVOR_ALIAS(rcu_flavor, alias_rcu_flavor);
 
 #include "urcu-call-rcu-impl.h"
 #include "urcu-defer-impl.h"
+#include "urcu-poll-impl.h"