ESP-IDF
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Outline
#include "bt_common.h"
#include "osi/allocator.h"
#include "osi/future.h"
#include "osi/osi.h"
future_new()
future_new_immediate(void *)
future_ready(future_t *, void *)
future_await(future_t *)
future_free(future_t *)
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/bt/common/osi/future.c
 
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/****************************************************************************** * * Copyright (C) 2014 Google, Inc. * * 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 "bt_common.h" #include "osi/allocator.h" #include "osi/future.h" #include "osi/osi.h" void future_free(future_t *future); future_t *future_new(void) { future_t *ret = osi_calloc(sizeof(future_t)); if (!ret) { OSI_TRACE_ERROR("%s unable to allocate memory for return value.", __func__); goto error; }{...} if (osi_sem_new(&ret->semaphore, 1, 0) != 0) { OSI_TRACE_ERROR("%s unable to allocate memory for the semaphore.", __func__); goto error; }{...} ret->ready_can_be_called = true; return ret; error:; future_free(ret); return NULL; }{ ... } future_t *future_new_immediate(void *value) { future_t *ret = osi_calloc(sizeof(future_t)); if (!ret) { OSI_TRACE_ERROR("%s unable to allocate memory for return value.", __func__); goto error; }{...} ret->result = value; ret->ready_can_be_called = false; return ret; error:; future_free(ret); return NULL; }{ ... } void future_ready(future_t *future, void *value) { assert(future != NULL); assert(future->ready_can_be_called); future->ready_can_be_called = false; future->result = value; osi_sem_give(&future->semaphore); }{ ... } void *future_await(future_t *future) { assert(future != NULL); // If the future is immediate, it will not have a semaphore if (future->semaphore) { osi_sem_take(&future->semaphore, OSI_SEM_MAX_TIMEOUT); }{...} void *result = future->result; future_free(future); return result; }{ ... } void future_free(future_t *future) { if (!future) { return; }{...} if (future->semaphore) { osi_sem_free(&future->semaphore); }{...} osi_free(future); }{ ... }
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