prosody
b03c7884fade
util/async.lua

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util/async.lua @ 8610:b03c7884fade

util.async: You can never have too many asserts!
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Mar 2018 22:30:25 +0000
parent 8609:9f6ab206d741
child 8611:937de0c39279
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8609:9f6ab206d741 8610:b03c7884fade
21 -- Running the coroutine failed, which means we have to find the runner manually, 21 -- Running the coroutine failed, which means we have to find the runner manually,
22 -- in order to inform the error handler 22 -- in order to inform the error handler
23 local level = 0; 23 local level = 0;
24 while debug.getinfo(thread, level, "") do level = level + 1; end 24 while debug.getinfo(thread, level, "") do level = level + 1; end
25 ok, runner = debug.getlocal(thread, level-1, 1); 25 ok, runner = debug.getlocal(thread, level-1, 1);
26 assert(ok == "self", "unexpected async state: variable mismatch");
27 assert(runner.thread == thread, "unexpected async state: thread mismatch");
26 local error_handler = runner.watchers.error; 28 local error_handler = runner.watchers.error;
27 if error_handler then error_handler(runner, debug.traceback(thread, err)); end 29 if error_handler then error_handler(runner, debug.traceback(thread, err)); end
28 local ready_handler = runner.watchers.ready; 30 local ready_handler = runner.watchers.ready;
29 runner.state, runner.thread = "ready", nil; 31 runner.state, runner.thread = "ready", nil;
30 if ready_handler then ready_handler(runner); end 32 if ready_handler then ready_handler(runner); end