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author | Thomas Harning Jr <harningt@gmail.com> | 2007-09-21 12:10:52 -0400 |
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committer | Thomas Harning Jr <harningt@gmail.com> | 2007-09-21 12:10:52 -0400 |
commit | e54be68770789933411ec8e7e0d99876cb4ebb89 (patch) | |
tree | f2e3a982c510fb352796db425217a3d8e1555edd /doc | |
parent | cc0c4b0f169a4b2a0a5d86003284b95bbfe323f0 (diff) | |
download | luaevent-prosody-e54be68770789933411ec8e7e0d99876cb4ebb89.tar.gz luaevent-prosody-e54be68770789933411ec8e7e0d99876cb4ebb89.zip |
Relocated the COROUTINE_MANAGEMENT document...
Diffstat (limited to 'doc')
-rw-r--r-- | doc/COROUTINE_MANAGEMENT | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/doc/COROUTINE_MANAGEMENT b/doc/COROUTINE_MANAGEMENT new file mode 100644 index 0000000..1af0cb4 --- /dev/null +++ b/doc/COROUTINE_MANAGEMENT @@ -0,0 +1,39 @@ +Due to the issue w/ self-resuming threads and crashing out threads, +a management system needs to be in place. + +Example thread system: + +MAIN +EVENT_LOOP --------running--- +WAITING ON READ +WAITING ON WRITE +WAITING ON CONNECT + + +Since main and the other 'waiting' threads are yielded, it is unsafe to call things arbitrarily on them +or resume them from themselves... +However the EVENT_LOOP one is running and thus can execute the callbacks (which can resume the threads) +Each of the 'waiting' events are attached to an event and contain a pointer, this pointer can be setup to point +to a per event_base item which will be updated w/ the lua_State of whatever calls EVENT_LOOP... +this will guarantee that the thread will be resumed from the currently running EVENT_LOOP + + +Other system that's more complicated and less likely: + +MAIN +EVENT_LOOP a -----running--- + +WAITING ON READ a +WAITING ON WRITE a + +EVENT_LOOP b ----yielded +WAITING ON READ b + + +Since there can only be one event_loop running per event_base, you do not have to worry about +cross-pollination of the different waits... + +NOTES: +If the event_loop thread goes away... then the waiting coroutines will have no way to get back... +though in this case, they are dead in the water anyways.. until a new event_loop starts... +in which case the lua_State references has been updated...
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