Diff: mbed-client/mbed-client-classic/source/m2mtimerpimpl.cpp

Revision:

0:a7a43371b306

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/mbed-client-classic/source/m2mtimerpimpl.cpp	Sun May 14 18:40:18 2017 +0000
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2015-2016 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <assert.h>
+#include <time.h>
+
+#include "mbed-client-classic/m2mtimerpimpl.h"
+#include "mbed-client/m2mtimerobserver.h"
+#include "mbed-client/m2mvector.h"
+
+#include "eventOS_event.h"
+#include "eventOS_event_timer.h"
+#include "eventOS_scheduler.h"
+#include "ns_hal_init.h"
+
+#define MBED_CLIENT_TIMER_TASKLET_INIT_EVENT 0 // Tasklet init occurs always when generating a tasklet
+#define MBED_CLIENT_TIMER_EVENT 10
+
+#ifdef MBED_CONF_MBED_CLIENT_EVENT_LOOP_SIZE
+#define MBED_CLIENT_EVENT_LOOP_SIZE MBED_CONF_MBED_CLIENT_EVENT_LOOP_SIZE
+#else
+#define MBED_CLIENT_EVENT_LOOP_SIZE 1024
+#endif
+
+int8_t M2MTimerPimpl::_tasklet_id = -1;
+
+int8_t M2MTimerPimpl::_next_timer_id = 1;
+
+static m2m::Vector<M2MTimerPimpl*> timer_impl_list;
+
+extern "C" void tasklet_func(arm_event_s *event)
+{
+    // skip the init event as there will be a timer event after
+    if (event->event_type == MBED_CLIENT_TIMER_EVENT) {
+        bool timer_found = false;
+        eventOS_scheduler_mutex_wait();
+        int timer_count = timer_impl_list.size();
+        for (int index = 0; index < timer_count; index++) {
+            M2MTimerPimpl* timer = timer_impl_list[index];
+            if (timer->get_timer_id() == event->event_id) {
+                eventOS_scheduler_mutex_release();
+                timer_found = true;
+                if (timer->get_still_left_time() > 0) {
+                    timer->start_still_left_timer();
+                }else {
+                    timer->timer_expired();
+                }
+                break;
+            }
+        }
+        if(!timer_found) {
+            eventOS_scheduler_mutex_release();
+        }
+    }
+}
+
+M2MTimerPimpl::M2MTimerPimpl(M2MTimerObserver& observer)
+: _observer(observer),
+  _single_shot(true),
+  _interval(0),
+  _type(M2MTimerObserver::Notdefined),
+  _intermediate_interval(0),
+  _total_interval(0),
+  _still_left(0),
+  _status(0),
+  _dtls_type(false)
+{
+    ns_hal_init(NULL, MBED_CLIENT_EVENT_LOOP_SIZE, NULL, NULL);
+    eventOS_scheduler_mutex_wait();
+    if (_tasklet_id < 0) {
+        _tasklet_id = eventOS_event_handler_create(tasklet_func, MBED_CLIENT_TIMER_TASKLET_INIT_EVENT);
+        assert(_tasklet_id >= 0);
+    }
+
+    // XXX: this wraps over quite soon
+    _timer_id = M2MTimerPimpl::_next_timer_id++;
+    timer_impl_list.push_back(this);
+    eventOS_scheduler_mutex_release();
+}
+
+M2MTimerPimpl::~M2MTimerPimpl()
+{
+    // cancel the timer request, if any is pending
+    cancel();
+
+    // there is no turning back, event os does not have eventOS_event_handler_delete() or similar,
+    // so the tasklet is lost forever. Same goes with timer_impl_list, which leaks now memory.
+
+    // remove the timer from object list
+    eventOS_scheduler_mutex_wait();
+    int timer_count = timer_impl_list.size();
+    for (int index = 0; index < timer_count; index++) {
+        const M2MTimerPimpl* timer = timer_impl_list[index];
+        if (timer->get_timer_id() == _timer_id) {
+            timer_impl_list.erase(index);
+            break;
+        }
+    }
+    eventOS_scheduler_mutex_release();
+}
+
+void M2MTimerPimpl::start_timer( uint64_t interval,
+                                 M2MTimerObserver::Type type,
+                                 bool single_shot)
+{
+    _dtls_type = false;
+    _intermediate_interval = 0;
+    _total_interval = 0;
+    _status = 0;
+    _single_shot = single_shot;
+    _interval = interval;
+    _type = type;
+    _still_left = 0;
+    start();
+}
+
+void M2MTimerPimpl::start_dtls_timer(uint64_t intermediate_interval, uint64_t total_interval, M2MTimerObserver::Type type)
+{
+    _dtls_type = true;
+    _intermediate_interval = intermediate_interval;
+    _total_interval = total_interval;
+    _interval = _intermediate_interval;
+    _status = 0;
+    _single_shot = false;
+    _type = type;
+    start();
+}
+
+void M2MTimerPimpl::start()
+{
+    int status;
+    if(_interval > INT32_MAX) {
+        _still_left = _interval - INT32_MAX;
+        status = eventOS_event_timer_request(_timer_id, MBED_CLIENT_TIMER_EVENT,
+                                            M2MTimerPimpl::_tasklet_id,
+                                            INT32_MAX);
+    }
+    else {
+        status = eventOS_event_timer_request(_timer_id, MBED_CLIENT_TIMER_EVENT,
+                                            M2MTimerPimpl::_tasklet_id,
+                                            _interval);
+    }
+    assert(status == 0);
+}
+
+void M2MTimerPimpl::cancel()
+{
+    eventOS_event_timer_cancel(_timer_id, M2MTimerPimpl::_tasklet_id);
+}
+
+void M2MTimerPimpl::stop_timer()
+{
+    _interval = 0;
+    _single_shot = true;
+    _still_left = 0;
+    cancel();
+}
+
+void M2MTimerPimpl::timer_expired()
+{
+    _status++;
+    _observer.timer_expired(_type);
+
+    if ((!_dtls_type) && (!_single_shot)) {
+        // start next round of periodic timer
+        start();
+    } else if ((_dtls_type) && (!is_total_interval_passed())) {
+        // if only the intermediate time has passed, we need still wait up to total time
+        _interval = _total_interval - _intermediate_interval;
+        start();
+    }
+}
+
+bool M2MTimerPimpl::is_intermediate_interval_passed()
+{
+    if (_status > 0) {
+        return true;
+    }
+    return false;
+}
+
+bool M2MTimerPimpl::is_total_interval_passed()
+{
+    if (_status > 1) {
+        return true;
+    }
+    return false;
+}
+
+uint64_t M2MTimerPimpl::get_still_left_time() const
+{
+   return _still_left;
+}
+
+void M2MTimerPimpl::start_still_left_timer()
+{
+    if (_still_left > 0) {
+        int status;
+        if( _still_left > INT32_MAX) {
+            _still_left = _still_left - INT32_MAX;
+            status = eventOS_event_timer_request(_timer_id, MBED_CLIENT_TIMER_EVENT,
+                                                M2MTimerPimpl::_tasklet_id,
+                                                INT32_MAX);
+        }
+        else {
+            status = eventOS_event_timer_request(_timer_id, MBED_CLIENT_TIMER_EVENT,
+                                                M2MTimerPimpl::_tasklet_id,
+                                                _still_left);
+            _still_left = 0;
+        }
+        assert(status == 0);
+    } else {
+        _observer.timer_expired(_type);
+        if(!_single_shot) {
+            start_timer(_interval, _type, _single_shot);
+        }
+    }
+}