Add new example: "Shared buffer between asynchronous receives".

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@7750 48e7efb5-ca39-0410-a469-dd3cf9ba447f

diff --git a/examples/msg/mc/CMakeLists.txt b/examples/msg/mc/CMakeLists.txt
index 022fcf2..868bd24 100644 (file)
--- a/examples/msg/mc/CMakeLists.txt
+++ b/examples/msg/mc/CMakeLists.txt
@@ -5,9 +5,11 @@ set(EXECUTABLE_OUTPUT_PATH "${PROJECT_DIRECTORY}/examples/msg/mc/")
 add_executable(centralized centralized_mutex.c)
 add_executable(bugged1     bugged1.c)
 add_executable(bugged2     bugged2.c)
+add_executable(bugged3    bugged3.c)
 add_executable(random_test random_test.c)
 
 target_link_libraries(centralized simgrid m -fprofile-arcs)
 target_link_libraries(bugged1     simgrid m -fprofile-arcs)
 target_link_libraries(bugged2     simgrid m -fprofile-arcs)
-target_link_libraries(random_test     simgrid m -fprofile-arcs)
\ No newline at end of file
+target_link_libraries(bugged3     simgrid m -fprofile-arcs)
+target_link_libraries(random_test     simgrid m -fprofile-arcs)

diff --git a/examples/msg/mc/bugged3.c b/examples/msg/mc/bugged3.c
new file mode 100644 (file)
index 0000000..fa81b63
--- /dev/null
+++ b/examples/msg/mc/bugged3.c
@@ -0,0 +1,70 @@
+/**************** Shared buffer between asynchronous receives *****************/
+/* Server process assumes that the data from the second communication comm2   */
+/* will overwrite the one from the first communication, because of the order  */
+/* of the wait calls. This is not true because data copy can be triggered by  */
+/* a call to wait on the other end of the communication (client).             */
+/* NOTE that the communications use different mailboxes, but they share the   */
+/* same buffer for reception (task1).                                         */
+/******************************************************************************/
+
+#include <msg/msg.h>
+#include <mc/modelchecker.h>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(bugged3,"this example");
+
+int server(int argc,char *argv[]);
+int client(int argc,char *argv[]);
+
+int server(int argc,char *argv[])
+{
+  m_task_t task1;
+  long val1;
+  msg_comm_t comm1, comm2;
+
+  comm1 = MSG_task_irecv(&task1,"mymailbox1");
+  comm2 = MSG_task_irecv(&task1,"mymailbox2");
+  MSG_comm_wait(comm1, -1);
+  MSG_comm_wait(comm2, -1);
+
+  val1 = (long)MSG_task_get_data(task1);
+  INFO1("Received %lu", val1);
+  
+  MC_assert(val1 == 2);
+  
+  INFO0("OK");
+  return 0;
+}
+
+int client(int argc,char *argv[])
+{
+  msg_comm_t comm;
+  char *mbox;
+  m_task_t task1 = MSG_task_create("task", 0, 10000, (void *) atol(argv[1]));
+
+  mbox = bprintf("mymailbox%s", argv[1]);
+  
+  INFO1("Send %d!", atoi(argv[1]));
+  comm = MSG_task_isend(task1,mbox);
+  MSG_comm_wait(comm, -1);
+
+  xbt_free(mbox);
+  
+  return 0;
+}
+
+int main(int argc,char*argv[]) 
+{
+  MSG_global_init(&argc,argv);
+
+  MSG_create_environment("platform.xml");
+
+  MSG_function_register("server", server);
+
+  MSG_function_register("client", client);
+
+  MSG_launch_application("deploy_bugged3.xml");
+
+  MSG_main();
+
+  return 0;
+}