fix: handle EINTR correctly in get_cpu_mask_from_sysfs

[urcu.git] / doc / examples / urcu-flavors / signal.c

diff --git a/doc/examples/urcu-flavors/signal.c b/doc/examples/urcu-flavors/signal.c
deleted file mode 100644 (file)
index b7c279c..0000000
--- a/doc/examples/urcu-flavors/signal.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2013  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 <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-
-#define RCU_SIGNAL             /* Signal-based RCU flavor */
-#include <urcu.h>
-#include <urcu/rculist.h>      /* List example */
-#include <urcu/compiler.h>     /* For CAA_ARRAY_SIZE */
-
-/*
- * Example showing how to use the signal-based Userspace RCU flavor.
- *
- * This is a mock-up example where updates and RCU traversals are
- * performed by the same thread to keep things simple on purpose.
- */
-
-static CDS_LIST_HEAD(mylist);
-
-struct mynode {
-       uint64_t value;
-       struct cds_list_head node;      /* linked-list chaining */
-       struct rcu_head rcu_head;       /* for call_rcu() */
-};
-
-static
-int add_node(uint64_t v)
-{
-       struct mynode *node;
-
-       node = calloc(sizeof(*node), 1);
-       if (!node)
-               return -1;
-       node->value = v;
-       cds_list_add_rcu(&node->node, &mylist);
-       return 0;
-}
-
-static
-void rcu_free_node(struct rcu_head *rh)
-{
-       struct mynode *node = caa_container_of(rh, struct mynode, rcu_head);
-
-       free(node);
-}
-
-int main(int argc, char **argv)
-{
-       uint64_t values[] = { 42, 36, 24, };
-       unsigned int i;
-       int ret;
-       struct mynode *node, *n;
-
-       /*
-        * Each thread need using RCU read-side need to be explicitly
-        * registered.
-        */
-       rcu_register_thread();
-
-       /*
-        * Adding nodes to the linked-list. Safe against concurrent
-        * RCU traversals, require mutual exclusion with list updates.
-        */
-       for (i = 0; i < CAA_ARRAY_SIZE(values); i++) {
-               ret = add_node(values[i]);
-               if (ret)
-                       goto end;
-       }
-
-       /*
-        * We need to explicitly mark RCU read-side critical sections
-        * with rcu_read_lock() and rcu_read_unlock(). They can be
-        * nested. Those are no-ops for the QSBR flavor.
-        */
-       rcu_read_lock();
-
-       /*
-        * RCU traversal of the linked list.
-        */
-       cds_list_for_each_entry_rcu(node, &mylist, node) {
-               printf("Value: %" PRIu64 "\n", node->value);
-       }
-       rcu_read_unlock();
-
-       /*
-        * Removing nodes from linked list. Safe against concurrent RCU
-        * traversals, require mutual exclusion with list updates.
-        */
-       cds_list_for_each_entry_safe(node, n, &mylist, node) {
-               cds_list_del_rcu(&node->node);
-               /*
-                * call_rcu() will ensure that the handler
-                * "rcu_free_node" is executed after a grace period.
-                * call_rcu() can be called from RCU read-side critical
-                * sections.
-                */
-               call_rcu(&node->rcu_head, rcu_free_node);
-       }
-
-       sleep(1);
-
-       /*
-        * Waiting for previously called call_rcu handlers to complete
-        * before program exits, or in library destructors, is a good
-        * practice.
-        */
-       rcu_barrier();
-
-end:
-       rcu_unregister_thread();
-       return ret;
-}