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80 lines
2.6 KiB
80 lines
2.6 KiB
2 years ago
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/*
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* Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <limits.h>
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#include <stdatomic.h>
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#include "pthread_internal.h"
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#include "threadprogress.h"
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#include "libavutil/attributes.h"
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#include "libavutil/thread.h"
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DEFINE_OFFSET_ARRAY(ThreadProgress, thread_progress, init,
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(offsetof(ThreadProgress, progress_mutex)),
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(offsetof(ThreadProgress, progress_cond)));
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av_cold int ff_thread_progress_init(ThreadProgress *pro, int init_mode)
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{
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atomic_init(&pro->progress, init_mode ? -1 : INT_MAX);
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#if HAVE_THREADS
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if (init_mode)
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return ff_pthread_init(pro, thread_progress_offsets);
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#endif
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pro->init = init_mode;
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return 0;
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}
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av_cold void ff_thread_progress_destroy(ThreadProgress *pro)
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{
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#if HAVE_THREADS
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ff_pthread_free(pro, thread_progress_offsets);
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#else
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pro->init = 0;
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#endif
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}
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void ff_thread_progress_report(ThreadProgress *pro, int n)
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{
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if (atomic_load_explicit(&pro->progress, memory_order_relaxed) >= n)
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return;
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atomic_store_explicit(&pro->progress, n, memory_order_release);
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ff_mutex_lock(&pro->progress_mutex);
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ff_cond_broadcast(&pro->progress_cond);
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ff_mutex_unlock(&pro->progress_mutex);
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}
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void ff_thread_progress_await(const ThreadProgress *pro_c, int n)
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{
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/* Casting const away here is safe, because we only read from progress
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* and will leave pro_c in the same state upon leaving the function
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* as it had at the beginning. */
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ThreadProgress *pro = (ThreadProgress*)pro_c;
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if (atomic_load_explicit(&pro->progress, memory_order_acquire) >= n)
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return;
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ff_mutex_lock(&pro->progress_mutex);
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while (atomic_load_explicit(&pro->progress, memory_order_relaxed) < n)
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ff_cond_wait(&pro->progress_cond, &pro->progress_mutex);
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ff_mutex_unlock(&pro->progress_mutex);
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}
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