doc/examples: cds_wfs_pop

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

diff --git a/.gitignore b/.gitignore
index f0faa57d11520ff4cacab58aac7ec30eee8ddfb1..334626385b2d0aa534cafdbfd15b2437e9377448 100644 (file)
--- 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 4c0bd3c59ade7365b1eee9837b51aeff2c982528..85d615853f7304a540fe2debda136815f665dd0c 100644 (file)
--- 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 284753f98de43ba20c1c350d1540fece42b12c88..d98d9958f312497e3fad3b29f3d33399154bf1c6 100644 (file)
--- 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 (file)
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 (file)
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;
+}