From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 21 Jun 2013 20:31:49 +0000 (-0400)
Subject: doc/examples: cds_wfs_pop
X-Git-Tag: v0.8.0~42
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=95bba308b25b1d642d1ef96210bfb70384ab6de6;p=urcu.git

doc/examples: cds_wfs_pop

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/.gitignore b/.gitignore
index f0faa57..3346263 100644
--- a/.gitignore
+++ b/.gitignore
@@ -87,6 +87,7 @@ doc/examples/wfcqueue/cds_wfcq_dequeue
 doc/examples/wfcqueue/cds_wfcq_splice
 
 doc/examples/wfstack/cds_wfs_push
+doc/examples/wfstack/cds_wfs_pop
 
 #automake
 /config.h
diff --git a/doc/examples/Makefile.am b/doc/examples/Makefile.am
index 4c0bd3c..85d6158 100644
--- a/doc/examples/Makefile.am
+++ b/doc/examples/Makefile.am
@@ -42,7 +42,9 @@ doc_examples_wfstackdir = ${doc_examplesdir}/wfstack
 dist_doc_examples_wfstack_DATA = \
 	wfstack/Makefile \
 	wfstack/Makefile.cds_wfs_push \
-	wfstack/cds_wfs_push.c
+	wfstack/Makefile.cds_wfs_pop \
+	wfstack/cds_wfs_push.c \
+	wfstack/cds_wfs_pop.c
 
 if NO_SHARED
 # Don't build examples if shared libraries support was explicitly
diff --git a/doc/examples/wfstack/Makefile b/doc/examples/wfstack/Makefile
index 284753f..d98d995 100644
--- a/doc/examples/wfstack/Makefile
+++ b/doc/examples/wfstack/Makefile
@@ -13,7 +13,9 @@
 
 all:
 	$(MAKE) -f Makefile.cds_wfs_push
+	$(MAKE) -f Makefile.cds_wfs_pop
 
 .PHONY: clean
 clean:
 	$(MAKE) -f Makefile.cds_wfs_push clean
+	$(MAKE) -f Makefile.cds_wfs_pop clean
diff --git a/doc/examples/wfstack/Makefile.cds_wfs_pop b/doc/examples/wfstack/Makefile.cds_wfs_pop
new file mode 100644
index 0000000..24df951
--- /dev/null
+++ b/doc/examples/wfstack/Makefile.cds_wfs_pop
@@ -0,0 +1,21 @@
+# Copyright (C) 2013  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+#
+# THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+# OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+#
+# Permission is hereby granted to use or copy this program for any
+# purpose,  provided the above notices are retained on all copies.
+# Permission to modify the code and to distribute modified code is
+# granted, provided the above notices are retained, and a notice that
+# the code was modified is included with the above copyright notice.
+#
+# This makefile is purposefully kept simple to support GNU and BSD make.
+
+EXAMPLE_NAME = cds_wfs_pop
+
+SOURCES = $(EXAMPLE_NAME).c
+OBJECTS = $(EXAMPLE_NAME).o
+BINARY = $(EXAMPLE_NAME)
+LIBS = -lurcu-common
+
+include ../Makefile.examples.template
diff --git a/doc/examples/wfstack/cds_wfs_pop.c b/doc/examples/wfstack/cds_wfs_pop.c
new file mode 100644
index 0000000..4cdec0a
--- /dev/null
+++ b/doc/examples/wfstack/cds_wfs_pop.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2013  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program for any
+ * purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is
+ * granted, provided the above notices are retained, and a notice that
+ * the code was modified is included with the above copyright notice.
+ *
+ * This example shows how to pop nodes from a wfstack.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <urcu/wfstack.h>	/* Wait-free stack */
+#include <urcu/compiler.h>	/* For CAA_ARRAY_SIZE */
+
+/*
+ * Nodes populated into the stack.
+ */
+struct mynode {
+	int value;			/* Node content */
+	struct cds_wfs_node node;	/* Chaining in stack */
+};
+
+int main(int argc, char **argv)
+{
+	int values[] = { -5, 42, 36, 24, };
+	struct cds_wfs_stack mystack;	/* Stack */
+	unsigned int i;
+	int ret = 0;
+
+	cds_wfs_init(&mystack);
+
+	/*
+	 * Push nodes.
+	 */
+	for (i = 0; i < CAA_ARRAY_SIZE(values); i++) {
+		struct mynode *node;
+
+		node = malloc(sizeof(*node));
+		if (!node) {
+			ret = -1;
+			goto end;
+		}
+
+		cds_wfs_node_init(&node->node);
+		node->value = values[i];
+		cds_wfs_push(&mystack, &node->node);
+	}
+
+	/*
+	 * Pop nodes from the stack, one by one, from newest to oldest.
+	 */
+	printf("pop each mystack node:");
+	for (;;) {
+		struct cds_wfs_node *snode;
+		struct mynode *node;
+
+		snode = cds_wfs_pop_blocking(&mystack);
+		if (!snode) {
+			break;
+		}
+		node = caa_container_of(snode, struct mynode, node);
+		printf(" %d", node->value);
+		free(node);
+	}
+	printf("\n");
+end:
+	return ret;
+}