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Non-blocking garbage collector

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The garbage collector no longer blocks other processes from
adding/building store paths or adding GC roots. To prevent the
collector from deleting store paths just added by another process,
processes need to connect to the garbage collector via a Unix domain
socket to register new temporary roots.
This commit is contained in:
Eelco Dolstra 2021-08-16 20:03:32 +02:00
parent 9947f1646a
commit 8614cf1334
11 changed files with 344 additions and 272 deletions
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10
src/libutil/util.cc
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@ -1670,7 +1670,7 @@ std::unique_ptr<InterruptCallback> createInterruptCallback(std::function<void()>
}
AutoCloseFD createUnixDomainSocket(const Path & path, mode_t mode)
AutoCloseFD createUnixDomainSocket()
{
AutoCloseFD fdSocket = socket(PF_UNIX, SOCK_STREAM
#ifdef SOCK_CLOEXEC
@ -1679,8 +1679,14 @@ AutoCloseFD createUnixDomainSocket(const Path & path, mode_t mode)
, 0);
if (!fdSocket)
throw SysError("cannot create Unix domain socket");
closeOnExec(fdSocket.get());
return fdSocket;
}
AutoCloseFD createUnixDomainSocket(const Path & path, mode_t mode)
{
auto fdSocket = nix::createUnixDomainSocket();
bind(fdSocket.get(), path);