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/*
This file is part of GNUnet
Copyright (C) 2022 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file testing/testing_api_cmd_barrier_reached.c
* @brief Command to signal barrier was reached.
* @author t3sserakt
*/
#include "platform.h"
#include "gnunet_testing_lib.h"
#include "gnunet_testing_ng_lib.h"
#include "gnunet_testing_plugin.h"
#include "gnunet_testing_barrier.h"
#include "gnunet_testing_netjail_lib.h"
#include "testing.h"
/**
* Struct with information for callbacks.
*
*/
struct BarrierReachedState
{
/**
* Callback to write messages to the master loop.
*
*/
GNUNET_TESTING_cmd_helper_write_cb write_message;
/**
* Context for our asynchronous completion.
*/
struct GNUNET_TESTING_AsyncContext ac;
/**
* The label of this command.
*/
const char *label;
/**
* The name of the barrier this commands wait (if finishing asynchronous) for or/and reaches.
*/
const char *barrier_name;
/*
* The global numer of the node the cmd runs on.
*/
unsigned int node_number;
/**
* If this command will block.
*/
unsigned int asynchronous_finish;
/**
* Is this cmd running on the master loop.
*/
unsigned int running_on_master;
};
/**
* Run the command.
*
* @param cls closure.
* @param is the interpreter state.
*/
static void
barrier_reached_run (void *cls,
struct GNUNET_TESTING_Interpreter *is)
{
struct BarrierReachedState *brs = cls;
struct GNUNET_TESTING_Barrier *barrier;
struct GNUNET_TESTING_Command *cmd = NULL;
struct CommandListEntry *cle;
size_t msg_length;
struct GNUNET_TESTING_CommandBarrierReached *msg;
size_t name_len;
barrier = GNUNET_TESTING_get_barrier (is, brs->barrier_name);
if (NULL == barrier)
{
barrier = GNUNET_new (struct GNUNET_TESTING_Barrier);
barrier->shadow = GNUNET_YES;
barrier->name = brs->label;
GNUNET_TESTING_interpreter_add_barrier (is, barrier);
}
barrier->reached++;
if (GNUNET_TESTING_can_barrier_advance (barrier))
{
//FIXME cmd uninitialized
GNUNET_assert (NULL != cmd);
cmd->asynchronous_finish = GNUNET_YES;
GNUNET_TESTING_finish_attached_cmds (is, barrier->name);
}
else if (GNUNET_NO == brs->asynchronous_finish)
{
/** FIXME: This is already fishy as commands in is are an array
* It is unclear how this does not end up with a DLL issue.
* We should create a dedicated struct to hold this list.
*/
cle = GNUNET_new (struct CommandListEntry);
cle->command = GNUNET_TESTING_interpreter_get_current_command (is);
GNUNET_CONTAINER_DLL_insert (barrier->cmds_head,
barrier->cmds_tail,
cle);
}
else
{
cmd->asynchronous_finish = GNUNET_YES;
}
if (GNUNET_NO == brs->running_on_master)
{
name_len = strlen (barrier->name) + 1;
msg_length = sizeof(struct GNUNET_TESTING_CommandBarrierReached);
msg = GNUNET_new (struct GNUNET_TESTING_CommandBarrierReached);
msg->header.size = htons ((uint16_t) msg_length);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_CMDS_HELPER_BARRIER_REACHED);
memcpy (&msg[1], barrier->name, name_len);
msg->node_number = brs->node_number;
brs->write_message ((struct GNUNET_MessageHeader *) msg, msg_length);
}
}
/**
* Cleanup the state from a "barrier reached" CMD, and possibly
* cancel a pending operation thereof.
*
* @param cls closure.
*/
static void
barrier_reached_cleanup (void *cls)
{
struct BarrierReachedState *brs = cls;
GNUNET_free (brs);
}
/**
* Offer internal data from a "batch" CMD, to other commands.
*
* @param cls closure.
* @param[out] ret result.
* @param trait name of the trait.
* @param index index number of the object to offer.
* @return #GNUNET_OK on success.
*/
static enum GNUNET_GenericReturnValue
barrier_reached_traits (void *cls,
const void **ret,
const char *trait,
unsigned int index)
{
struct BarrierReachedState *brs = cls;
struct GNUNET_TESTING_AsyncContext *ac = &brs->ac;
struct GNUNET_TESTING_Trait traits[] = {
GNUNET_TESTING_make_trait_async_context ((const void *) ac),
GNUNET_TESTING_trait_end ()
};
return GNUNET_TESTING_get_trait (traits,
ret,
trait,
index);
}
/**
* Create command.
*
* @param label name for command.
* @param barrier_label The name of the barrier we wait for (if finishing asynchronous) and which will be reached.
* @param asynchronous_finish If GNUNET_YES this command will not block. Can be NULL.
* @param node_number The global numer of the node the cmd runs on.
* @param running_on_master Is this cmd running on the master loop.
* @param write_message Callback to write messages to the master loop.
* @return command.
*/
struct GNUNET_TESTING_Command
GNUNET_TESTING_cmd_barrier_reached (
const char *label,
const char *barrier_label,
unsigned int asynchronous_finish,
unsigned int node_number,
unsigned int running_on_master,
GNUNET_TESTING_cmd_helper_write_cb write_message)
{
struct BarrierReachedState *brs;
brs = GNUNET_new (struct BarrierReachedState);
brs->label = label;
brs->barrier_name = barrier_label;
brs->asynchronous_finish = asynchronous_finish;
brs->node_number = node_number;
brs->running_on_master = running_on_master;
brs->write_message = write_message;
return GNUNET_TESTING_command_new (brs, label,
&barrier_reached_run,
&barrier_reached_cleanup,
&barrier_reached_traits,
&brs->ac);
}
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