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/*************************************************************************
* Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* An interface for asynchronous tasks. *_async() versions of functions
* return a dmnsn_progress* object which can indicate the progress of the
* background task, and wait for task completion. The task's return value
* is returned as an int from dmnsn_finish_progress().
*/
/** A progress object. */
typedef struct dmnsn_progress dmnsn_progress;
/**
* Join the worker thread and return it's integer return value in addition to
* deleting \p progress.
* @param[in,out] progress The background task to finish.
* @return The return value of the background task.
*/
int dmnsn_finish_progress(dmnsn_progress *progress);
/**
* Interrupt the execution of a background thread.
* @param[in,out] progress The background task to cancel.
*/
void dmnsn_cancel_progress(dmnsn_progress *progress);
/**
* Get the progress of the background task.
* @param[in] progress The background task to examine.
* @return The progress of the background task, out of 1.0.
*/
double dmnsn_get_progress(const dmnsn_progress *progress);
/**
* Wait for a certain amount of progress. Always use this rather than
* spinlocking.
* @param[in] progress The background task to monitor.
* @param[in] prog The progress value to wait for.
*/
void dmnsn_wait_progress(const dmnsn_progress *progress, double prog);
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