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Avoid interference with other users of waitpid.

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Instead of using waitpid(-1), explicitly waits on all known processes. This is inefficient for large numbers of child processes, but seems to be the only way to ensure to not interfere with other code that uses waitpid().
This commit is contained in:
Sönke Ludwig 2019-08-21 23:24:02 +02:00 committed by Sönke Ludwig
parent 72234fc0a7
commit 4724f14145
1 changed files with 11 additions and 5 deletions
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14
source/eventcore/drivers/posix/processes.d
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@ -273,11 +273,17 @@ final class SignalEventDriverProcesses(Loop : PosixEventLoop) : EventDriverProce
}
// instead, use waitpid to determine all exited processes
while (true) {
int status;
auto ret = () @trusted { return waitpid(-1, &status, WNOHANG); } ();
if (ret <= 0) break;
ProcessID[] allprocs;
() @trusted {
try synchronized (StaticProcesses.m_mutex)
allprocs = StaticProcesses.m_processes.keys;
catch (Exception e) assert(false, e.msg);
} ();
foreach (pid; allprocs) {
int status;
auto ret = () @trusted { return waitpid(cast(int)pid, &status, WNOHANG); } ();
if (ret == cast(int)pid)
onProcessExit(ret, () @trusted { return WEXITSTATUS(status); } ());
}
}