Import Mbed OS hard-float snapshot

connectivity/nanostack/nanostack-hal-mbed-cmsis-rtos/ns_event_loop_mbed.cpp

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018, Arm Limited and affiliates.
+ * 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 "mbed_assert.h"
+#include "platform/arm_hal_interrupt.h"
+#ifdef MBED_CONF_RTOS_PRESENT
+#include "cmsis.h"
+#include "cmsis_os2.h"
+#include "mbed_rtos_storage.h"
+#endif
+#include "ns_trace.h"
+
+#include "eventOS_scheduler.h"
+
+#include "mbed_error.h"
+#include "events/mbed_shared_queues.h"
+#include "events/Event.h"
+#include "ns_event_loop_mutex.h"
+#include "ns_event_loop.h"
+
+#define TRACE_GROUP "evlp"
+
+#if MBED_CONF_NANOSTACK_HAL_EVENT_LOOP_USE_MBED_EVENTS
+
+using events::EventQueue;
+using events::Event;
+
+static Event<void()> *event;
+static volatile int event_pending;
+static volatile bool started;
+
+void eventOS_scheduler_signal(void)
+{
+    platform_enter_critical();
+    if (started && event_pending == 0) {
+        event_pending = event->post();
+        MBED_ASSERT(event_pending != 0);
+    }
+    platform_exit_critical();
+}
+
+void eventOS_scheduler_idle(void)
+{
+    error("Shouldn't be called");
+}
+
+static void do_dispatch_with_mutex_held()
+{
+    platform_enter_critical();
+    event_pending = 0;
+    platform_exit_critical();
+
+    /* Process only 1 Nanostack event at a time, to try to be nice to
+     * others on the global queue.
+     */
+    eventOS_scheduler_mutex_wait();
+    bool dispatched = eventOS_scheduler_dispatch_event();
+    eventOS_scheduler_mutex_release();
+
+    /* Go round again if (potentially) more */
+    if (dispatched) {
+        eventOS_scheduler_signal();
+    }
+}
+
+void ns_event_loop_init(void)
+{
+    ns_event_loop_mutex_init();
+}
+
+void ns_event_loop_thread_create(void)
+{
+    EventQueue *equeue = mbed::mbed_event_queue();
+    MBED_ASSERT(equeue != NULL);
+
+    event = new Event<void()>(equeue, do_dispatch_with_mutex_held);
+    MBED_ASSERT(event != NULL);
+}
+
+void ns_event_loop_thread_start(void)
+{
+    started = true;
+    eventOS_scheduler_signal();
+}
+
+#endif // MBED_CONF_NANOSTACK_HAL_EVENT_LOOP_USE_MBED_EVENTS