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40 lines
1.3 KiB
40 lines
1.3 KiB
4 months ago
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# lws minimal ws server (threads) + SMP
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This demonstrates both independent threads creating content
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as in the -threads example, and multiple service threads
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as in the http-server-smp example (but with ws).
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## build
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You must first build libwebsockets itself with cmake `-DLWS_MAX_SMP=8`
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or some other number greater than one.
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```
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$ cmake . && make
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```
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Pthreads is required on your system.
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## usage
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```
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$ ./lws-minimal-ws-server-threads-smp
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[2019/01/28 06:59:17:4217] USER: LWS minimal ws server + threads + smp | visit http://localhost:7681
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[2019/01/28 06:59:17:4219] NOTICE: Service threads: 2
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[2019/01/28 06:59:17:4220] NOTICE: LWS_CALLBACK_EVENT_WAIT_CANCELLED in svc tid 0x7fec48af8700
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[2019/01/28 06:59:17:4220] NOTICE: LWS_CALLBACK_EVENT_WAIT_CANCELLED in svc tid 0x7fec48af8700
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...
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```
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Visit http://localhost:7681 on multiple browser windows. You may need to open
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4 before the second service thread is used (check "svc tid" in the browser output).
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Two lws service threads are started.
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Two separate asynchronous threads generate strings and add them to a ringbuffer,
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signalling all lws service threads to send new entries to all the browser windows.
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This demonstrates how to safely manage asynchronously generated content
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and hook it up to the lws service threads.
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