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RemoteStore::addToStore(): Fix race between stderrThread and NAR writer

Browse source 
As pointed out by @B4dM4n, the call to to.flush() on stderrThread is
unsafe because the NAR writer thread is also writing to 'to'.

Fixes #3943.
This commit is contained in:
Eelco Dolstra 2020-08-27 14:48:08 +02:00
parent 3ccf3801fb
commit a0f19d9f3a
3 changed files with 13 additions and 8 deletions
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6
src/libutil/serialise.hh
View file

@ -23,7 +23,8 @@ struct Sink
};
/* A buffered abstract sink. */
/* A buffered abstract sink. Warning: a BufferedSink should not be
used from multiple threads concurrently. */
struct BufferedSink : virtual Sink
{
size_t bufSize, bufPos;
@ -66,7 +67,8 @@ struct Source
};
/* A buffered abstract source. */
/* A buffered abstract source. Warning: a BufferedSink should not be
used from multiple threads concurrently. */
struct BufferedSource : Source
{
size_t bufSize, bufPosIn, bufPosOut;