mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 06:11:06 +00:00
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/******************************************************************************
|
|
*
|
|
* 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);
|
|
}
|