You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.6 KiB
42 lines
1.6 KiB
/******************************************************************************
|
|
*
|
|
* Copyright 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
typedef struct future_t future_t;
|
|
|
|
#define FUTURE_SUCCESS ((void*)1)
|
|
#define FUTURE_FAIL ((void*)0)
|
|
|
|
// Constructs a new future_t object. Returns NULL on failure.
|
|
future_t* future_new(void);
|
|
|
|
// Constructs a new future_t object with an immediate |value|. No waiting will
|
|
// occur in the call to |future_await| because the value is already present.
|
|
// Returns NULL on failure.
|
|
future_t* future_new_immediate(void* value);
|
|
|
|
// Signals that the |future| is ready, passing |value| back to the context
|
|
// waiting for the result. Must only be called once for every future.
|
|
// |future| may not be NULL.
|
|
void future_ready(future_t* future, void* value);
|
|
|
|
// Waits for the |future| to be ready. Returns the value set in |future_ready|.
|
|
// Frees the future before return. |future| may not be NULL.
|
|
void* future_await(future_t* async_result);
|