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- /******************************************************************************
- *
- * 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);
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