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79 lines
2.6 KiB
79 lines
2.6 KiB
/* |
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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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