Import of the watch repository from Pebble

src/fw/applib/app_outbox.c

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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 "applib/app_outbox.h"
+#include "kernel/events.h"
+#include "process_state/app_state/app_state.h"
+#include "syscall/syscall.h"
+
+static void prv_handle_event(PebbleEvent *e, void *unused) {
+  const PebbleAppOutboxSentEvent *sent_event = &e->app_outbox_sent;
+  sent_event->sent_handler(sent_event->status, sent_event->cb_ctx);
+}
+
+void app_outbox_send(const uint8_t *data, size_t length,
+                     AppOutboxSentHandler sent_handler, void *cb_ctx) {
+  sys_app_outbox_send(data, length, sent_handler, cb_ctx);
+}
+
+void app_outbox_init(void) {
+  EventServiceInfo *info = app_state_get_app_outbox_subscription_info();
+  *info = (EventServiceInfo) {
+    .type = PEBBLE_APP_OUTBOX_SENT_EVENT,
+    .handler = prv_handle_event,
+  };
+  event_service_client_subscribe(info);
+}