feature: support cosocket and other yieldable APIs in init_worker_by_lua* - #2521
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Enable TCP/UDP cosockets, ngx.sleep, ngx.semaphore, ngx.thread.spawn, coroutine.*, and ngx.run_worker_thread inside init_worker_by_lua* by running a bounded event pump when the init code yields. Key changes: - Add ngx_http_lua_init_worker_pump() to drive the event loop during yields - Add ngx_http_lua_init_worker_pump_loop() with timeout budget management - Add ngx_http_lua_init_worker_toggle_accept() to disarm/re-arm listeners around the pump (prevents level-triggered busy-spin from pending accepts) - Freeze ngx.timer.at registrations via ctx->context gate; flush at runner exit with absolute expiry preservation (timer ordering identical to before) - Add lua_init_worker_timeout directive (default 0 = no timeout) - Add lua_init_worker_abort_on_error directive (default off) - Add INIT_WORKER to NGX_HTTP_LUA_CONTEXT_YIELDABLE mask in util.h - Change runtime error prefix to "lua entry thread aborted:" (breaking) - Update README: new directives, cosocket availability, 118 API context lines
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Enable TCP/UDP cosockets, ngx.sleep, ngx.semaphore, ngx.thread.spawn, coroutine., and ngx.run_worker_thread inside init_worker_by_lua by running a bounded event pump when the init code yields.
Key changes:
I hereby granted the copyright of the changes in this pull request
to the authors of this lua-nginx-module project.
sister PR: openresty/stream-lua-nginx-module#409