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41 lines
1.6 KiB
41 lines
1.6 KiB
/****************************************************************************** |
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* |
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* Copyright (C) 2014 Google, Inc. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at: |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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******************************************************************************/ |
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#pragma once |
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typedef struct future_t future_t; |
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#define FUTURE_SUCCESS ((void*)1) |
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#define FUTURE_FAIL ((void*)0) |
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// Constructs a new future_t object. Returns NULL on failure. |
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future_t* future_new(void); |
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// Constructs a new future_t object with an immediate |value|. No waiting will |
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// occur in the call to |future_await| because the value is already present. |
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// Returns NULL on failure. |
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future_t* future_new_immediate(void* value); |
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// Signals that the |future| is ready, passing |value| back to the context |
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// waiting for the result. Must only be called once for every future. |
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// |future| may not be NULL. |
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void future_ready(future_t* future, void* value); |
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// Waits for the |future| to be ready. Returns the value set in |future_ready|. |
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// Frees the future before return. |future| may not be NULL. |
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void* future_await(future_t* async_result);
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