FFmpeg

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Commit Graph

Author	SHA1	Message	Date
Zhao Zhili	baf3123c1c	avutil/executor: Allowing thread_count be zero Before the patch, disable threads support at configure/build time was the only method to force zero thread in executor. However, it's common practice for libavcodec to run on caller's thread when user specify thread number to one. And for WASM environment, whether threads are supported needs to be detected at runtime. So executor should support zero thread at runtime. A single thread executor can be useful, e.g., to handle network protocol. So we can't take thread_count one as zero thread, which disabled a valid usercase. Other libraries take -threads 0 to mean auto. Executor as a low level utils doesn't do cpu detect. So take thread_count zero as zero thread, literally. Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>	7 months ago
Nuo Mi	25ecc94d58	avutil: add thread executor The executor design pattern was introduced by java <https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/Executor.html> it also adapted by python <https://docs.python.org/3/library/concurrent.futures.html> Compared to handcrafted thread pool management, it greatly simplifies the thread code. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	1 year ago

Author

SHA1

Message

Date

Zhao Zhili

baf3123c1c

avutil/executor: Allowing thread_count be zero

Before the patch, disable threads support at configure/build time
was the only method to force zero thread in executor. However,
it's common practice for libavcodec to run on caller's thread when
user specify thread number to one. And for WASM environment, whether
threads are supported needs to be detected at runtime. So executor
should support zero thread at runtime.

A single thread executor can be useful, e.g., to handle network
protocol. So we can't take thread_count one as zero thread, which
disabled a valid usercase.

Other libraries take -threads 0 to mean auto. Executor as a low
level utils doesn't do cpu detect. So take thread_count zero as
zero thread, literally.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

7 months ago

Nuo Mi

25ecc94d58

avutil: add thread executor

The executor design pattern was introduced by java
<https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/Executor.html>
it also adapted by python
<https://docs.python.org/3/library/concurrent.futures.html>
Compared to handcrafted thread pool management, it greatly simplifies the thread code.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 year ago

2 Commits (0e19b05375cf0a00240f0b08722bbfd14ccf9682)