Create wrapper symbols for LGPL linking.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
endif
lib_LTLIBRARIES = liburcu.la liburcu-qsbr.la liburcu-mb.la liburcu-signal.la \
- liburcu-bp.la liburcu-defer.la libwfqueue.la
+ liburcu-bp.la liburcu-defer.la libwfqueue.la libwfstack.la
liburcu_la_SOURCES = urcu.c urcu-pointer.c $(COMPAT)
liburcu_defer_la_SOURCES = urcu-defer.c $(COMPAT)
libwfqueue_la_SOURCES = wfqueue.c $(COMPAT)
+libwfstack_la_SOURCES = wfstack.c $(COMPAT)
test_uatomic test_urcu_assign test_urcu_assign_dynamic_link \
test_urcu_bp test_urcu_bp_dynamic_link test_cycles_per_loop \
test_urcu_lfq test_urcu_wfq test_urcu_lfs test_urcu_wfs \
- test_urcu_wfq_dynlink
+ test_urcu_wfq_dynlink test_urcu_wfs_dynlink
noinst_HEADERS = rcutorture.h
if COMPAT_ARCH
URCU_SIGNAL_LIB=$(top_builddir)/liburcu-signal.la
URCU_BP_LIB=$(top_builddir)/liburcu-bp.la
WFQUEUE_LIB=$(top_builddir)/libwfqueue.la
+WFSTACK_LIB=$(top_builddir)/libwfstack.la
EXTRA_DIST = $(top_srcdir)/tests/api_*.h
test_urcu_wfq_dynlink_CFLAGS = -DDYNAMIC_LINK_TEST $(AM_CFLAGS)
test_urcu_wfq_dynlink_LDADD = $(WFQUEUE_LIB)
test_urcu_lfs_SOURCES = test_urcu_lfs.c $(URCU_DEFER)
-test_urcu_wfs_SOURCES = test_urcu_wfs.c $(URCU_DEFER)
+test_urcu_wfs_SOURCES = test_urcu_wfs.c
+test_urcu_wfs_dynlink_SOURCES = test_urcu_wfs.c
+test_urcu_wfs_dynlink_CFLAGS = -DDYNAMIC_LINK_TEST $(AM_CFLAGS)
+test_urcu_wfs_dynlink_LDADD = $(WFSTACK_LIB)
urcutorture.c: api.h
--- /dev/null
+#ifndef _URCU_WFSTACK_STATIC_H
+#define _URCU_WFSTACK_STATIC_H
+
+/*
+ * wfstack-static.h
+ *
+ * Userspace RCU library - Stack with Wait-Free push, Blocking pop.
+ *
+ * TO BE INCLUDED ONLY IN LGPL-COMPATIBLE CODE. See wfstack.h for linking
+ * dynamically with the userspace rcu library.
+ *
+ * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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
+ */
+
+#include <pthread.h>
+#include <assert.h>
+#include <urcu/compiler.h>
+#include <urcu/uatomic_arch.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define WF_STACK_END ((void *)0x1UL)
+#define WFS_ADAPT_ATTEMPTS 10 /* Retry if being set */
+#define WFS_WAIT 10 /* Wait 10 ms if being set */
+
+void _wfs_node_init(struct wfs_node *node)
+{
+ node->next = NULL;
+}
+
+void _wfs_init(struct wfs_stack *s)
+{
+ int ret;
+
+ s->head = WF_STACK_END;
+ ret = pthread_mutex_init(&s->lock, NULL);
+ assert(!ret);
+}
+
+void _wfs_push(struct wfs_stack *s, struct wfs_node *node)
+{
+ struct wfs_node *old_head;
+
+ assert(node->next == NULL);
+ /*
+ * uatomic_xchg() implicit memory barrier orders earlier stores to node
+ * (setting it to NULL) before publication.
+ */
+ old_head = uatomic_xchg(&s->head, node);
+ /*
+ * At this point, dequeuers see a NULL node->next, they should busy-wait
+ * until node->next is set to old_head.
+ */
+ STORE_SHARED(node->next, old_head);
+}
+
+/*
+ * Returns NULL if stack is empty.
+ */
+struct wfs_node *
+___wfs_pop_blocking(struct wfs_stack *s)
+{
+ struct wfs_node *head, *next;
+ int attempt = 0;
+
+retry:
+ head = LOAD_SHARED(s->head);
+ if (head == WF_STACK_END)
+ return NULL;
+ /*
+ * Adaptative busy-looping waiting for push to complete.
+ */
+ while ((next = LOAD_SHARED(head->next)) == NULL) {
+ if (++attempt >= WFS_ADAPT_ATTEMPTS) {
+ poll(NULL, 0, WFS_WAIT); /* Wait for 10ms */
+ attempt = 0;
+ } else
+ cpu_relax();
+ }
+ if (uatomic_cmpxchg(&s->head, head, next) == head)
+ return head;
+ else
+ goto retry; /* Concurrent modification. Retry. */
+}
+
+struct wfs_node *
+_wfs_pop_blocking(struct wfs_stack *s)
+{
+ struct wfs_node *retnode;
+ int ret;
+
+ ret = pthread_mutex_lock(&s->lock);
+ assert(!ret);
+ retnode = ___wfs_pop_blocking(s);
+ ret = pthread_mutex_unlock(&s->lock);
+ assert(!ret);
+ return retnode;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _URCU_WFSTACK_STATIC_H */
#define _URCU_WFSTACK_H
/*
- * rcuwfstack.h
+ * wfstack.h
*
* Userspace RCU library - Stack with Wait-Free push, Blocking pop.
*
extern "C" {
#endif
-#if (!defined(_GNU_SOURCE) && !defined(_LGPL_SOURCE))
-#error "Dynamic loader LGPL wrappers not implemented yet"
-#endif
-
-#define WF_STACK_END ((void *)0x1UL)
-#define WFS_ADAPT_ATTEMPTS 10 /* Retry if being set */
-#define WFS_WAIT 10 /* Wait 10 ms if being set */
-
struct wfs_node {
struct wfs_node *next;
};
pthread_mutex_t lock;
};
-void wfs_node_init(struct wfs_node *node)
-{
- node->next = NULL;
-}
+#ifdef _LGPL_SOURCE
-void wfs_init(struct wfs_stack *s)
-{
- int ret;
+#include <urcu/wfstack-static.h>
- s->head = WF_STACK_END;
- ret = pthread_mutex_init(&s->lock, NULL);
- assert(!ret);
-}
+#define wfs_node_init _wfs_node_init
+#define wfs_init _wfs_init
+#define wfs_push _wfs_push
+#define __wfs_pop_blocking ___wfs_pop_blocking
+#define wfs_pop_blocking _wfs_pop_blocking
-void wfs_push(struct wfs_stack *s, struct wfs_node *node)
-{
- struct wfs_node *old_head;
+#else /* !_LGPL_SOURCE */
- assert(node->next == NULL);
- /*
- * uatomic_xchg() implicit memory barrier orders earlier stores to node
- * (setting it to NULL) before publication.
- */
- old_head = uatomic_xchg(&s->head, node);
- /*
- * At this point, dequeuers see a NULL node->next, they should busy-wait
- * until node->next is set to old_head.
- */
- STORE_SHARED(node->next, old_head);
-}
+extern void wfs_node_init(struct wfs_node *node);
+extern void wfs_init(struct wfs_stack *s);
+extern void wfs_push(struct wfs_stack *s, struct wfs_node *node);
+/* __wfs_pop_blocking: caller ensures mutual exclusion between pops */
+extern struct wfs_node *__wfs_pop_blocking(struct wfs_stack *s);
+extern struct wfs_node *wfs_pop_blocking(struct wfs_stack *s);
-/*
- * Returns NULL if stack is empty.
- */
-struct wfs_node *
-__wfs_pop_blocking(struct wfs_stack *s)
-{
- struct wfs_node *head, *next;
- int attempt = 0;
-
-retry:
- head = LOAD_SHARED(s->head);
- if (head == WF_STACK_END)
- return NULL;
- /*
- * Adaptative busy-looping waiting for push to complete.
- */
- while ((next = LOAD_SHARED(head->next)) == NULL) {
- if (++attempt >= WFS_ADAPT_ATTEMPTS) {
- poll(NULL, 0, WFS_WAIT); /* Wait for 10ms */
- attempt = 0;
- } else
- cpu_relax();
- }
- if (uatomic_cmpxchg(&s->head, head, next) == head)
- return head;
- else
- goto retry; /* Concurrent modification. Retry. */
-}
-
-struct wfs_node *
-wfs_pop_blocking(struct wfs_stack *s)
-{
- struct wfs_node *retnode;
- int ret;
-
- ret = pthread_mutex_lock(&s->lock);
- assert(!ret);
- retnode = __wfs_pop_blocking(s);
- ret = pthread_mutex_unlock(&s->lock);
- assert(!ret);
- return retnode;
-}
+#endif /* !_LGPL_SOURCE */
#ifdef __cplusplus
}
--- /dev/null
+/*
+ * wfstack.c
+ *
+ * Userspace RCU library - Stack with Wait-Free push, Blocking pop.
+ *
+ * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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
+ */
+
+/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
+#include "urcu/wfstack.h"
+#include "urcu/wfstack-static.h"
+
+void wfs_node_init(struct wfs_node *node)
+{
+ _wfs_node_init(node);
+}
+
+void wfs_init(struct wfs_stack *s)
+{
+ _wfs_init(s);
+}
+
+void wfs_push(struct wfs_stack *s, struct wfs_node *node)
+{
+ _wfs_push(s, node);
+}
+
+struct wfs_node *__wfs_pop_blocking(struct wfs_stack *s)
+{
+ return ___wfs_pop_blocking(s);
+}
+
+struct wfs_node *wfs_pop_blocking(struct wfs_stack *s)
+{
+ return _wfs_pop_blocking(s);
+}
projects / userspace-rcu.git / commitdiff
