I'd try picking a value >= 70000 and just casting it to the enum. I don't think
there's an official mechanism for doing that. Although you could use
EVENT_IMMEDIATE and pass additional data in the edata field.
On Wednesday, November 16, 2016 7:42 AM, Jonathan Adams
<[email protected]> wrote:
Hi,
I am writing a plugin that will perform some (relatively) slow actions on an
incoming request. My plan is that, rather than having the plugin block waiting
for each action to finish, they will launch in separate threads and then send
an event to the appropriate TSCont instance to indicate the action is finished.
I know I can use TSContCall to send an event which expects a TSEvent value. But
I want to send a custom event, not one of the TSEvent values.
As a simple solution I picked one of the TSEvent values that I would never
expect to get normally (one of the internal values) and used that to indicate
this is a custom event, bundling up the actual event details in the event data
object.
Does this seem like a reasonable solution? Has anyone done anything like this
before? Is there a better method to generate custom events?
Additionally, in my prototype I noticed that handling this event appears to
happen in the same thread as the TSContCall call (that is, it appears to be
synchronous). Is this safe? In particular I am likely to be doing something
like calling TSHttpTxnReenable in response to this event. Are there any rules
around interacting with transactions on different threads that I would need to
be aware of? Or is it simply a matter of guarding access with a mutex as
appropriate?
Thanks,
Jonathan.
Jonathan Adams
Software Engineer
[Telephone] +44 118 903 8610
[Twitter]@clearswift
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