100% CPU usage on Linux after #261

[xfalcox]

Built my tauri app on many different commits of the tao next brach, and managed to pinpoint the 100% CPU coming from #261

strace shows

poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=23, events=POLLIN}, {fd=26, events=POLLIN}], 5, 0) = 0 (Timeout)

[wusyong]

Looks like it's caused by try_recv loop. I'll try to use glib's channel instead.

[wusyong]

@xfalcox If you are close to upstream tao next branch, could test if this works.
I tested examples in tao, and those who use Wait control flow should calm down now.

[xfalcox]

Can confirm the #265 fixed it! Thanks @wusyong !