| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include <limits.h> | ||
| 22 | #include <stdatomic.h> | ||
| 23 | |||
| 24 | #include "pthread_internal.h" | ||
| 25 | #include "threadprogress.h" | ||
| 26 | #include "libavutil/attributes.h" | ||
| 27 | #include "libavutil/thread.h" | ||
| 28 | |||
| 29 | DEFINE_OFFSET_ARRAY(ThreadProgress, thread_progress, init, | ||
| 30 | (offsetof(ThreadProgress, progress_mutex)), | ||
| 31 | (offsetof(ThreadProgress, progress_cond))); | ||
| 32 | |||
| 33 | 2517 | av_cold int ff_thread_progress_init(ThreadProgress *pro, int init_mode) | |
| 34 | { | ||
| 35 |
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2517 | atomic_init(&pro->progress, init_mode ? -1 : INT_MAX); |
| 36 | #if HAVE_THREADS | ||
| 37 |
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2517 | if (init_mode) |
| 38 | 4 | return ff_pthread_init(pro, thread_progress_offsets); | |
| 39 | #endif | ||
| 40 | 2513 | pro->init = init_mode; | |
| 41 | 2513 | return 0; | |
| 42 | } | ||
| 43 | |||
| 44 | 2517 | av_cold void ff_thread_progress_destroy(ThreadProgress *pro) | |
| 45 | { | ||
| 46 | #if HAVE_THREADS | ||
| 47 | 2517 | ff_pthread_free(pro, thread_progress_offsets); | |
| 48 | #else | ||
| 49 | pro->init = 0; | ||
| 50 | #endif | ||
| 51 | 2517 | } | |
| 52 | |||
| 53 | 25254 | void ff_thread_progress_report(ThreadProgress *pro, int n) | |
| 54 | { | ||
| 55 |
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25254 | if (atomic_load_explicit(&pro->progress, memory_order_relaxed) >= n) |
| 56 | 24676 | return; | |
| 57 | |||
| 58 | 578 | atomic_store_explicit(&pro->progress, n, memory_order_release); | |
| 59 | |||
| 60 | 578 | ff_mutex_lock(&pro->progress_mutex); | |
| 61 | 578 | ff_cond_broadcast(&pro->progress_cond); | |
| 62 | 578 | ff_mutex_unlock(&pro->progress_mutex); | |
| 63 | } | ||
| 64 | |||
| 65 | 2592454 | void ff_thread_progress_await(const ThreadProgress *pro_c, int n) | |
| 66 | { | ||
| 67 | /* Casting const away here is safe, because we only read from progress | ||
| 68 | * and will leave pro_c in the same state upon leaving the function | ||
| 69 | * as it had at the beginning. */ | ||
| 70 | 2592454 | ThreadProgress *pro = (ThreadProgress*)pro_c; | |
| 71 | |||
| 72 |
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2592454 | if (atomic_load_explicit(&pro->progress, memory_order_acquire) >= n) |
| 73 | 2592403 | return; | |
| 74 | |||
| 75 | 51 | ff_mutex_lock(&pro->progress_mutex); | |
| 76 |
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102 | while (atomic_load_explicit(&pro->progress, memory_order_relaxed) < n) |
| 77 | 51 | ff_cond_wait(&pro->progress_cond, &pro->progress_mutex); | |
| 78 | 51 | ff_mutex_unlock(&pro->progress_mutex); | |
| 79 | } | ||
| 80 |