Christos Margiolis 44e128fe9d sound: Implement asynchronous device detach ... Hot-unplugging a sound device, such as a USB sound card, whilst being consumed by an application, results in an infinite loop until either the application closes the device's file descriptor, or the channel automatically times out after hw.snd.timeout seconds. In the case of a detach however, the timeout approach is still not ideal, since we want all resources to be released immediatelly, without waiting for N seconds until we can use the bus again. The timeout mechanism works by calling chn_sleep() in chn_read() and chn_write() (see pcm/channel.c) in order to send the thread to sleep, using cv_timedwait_sig(). Since chn_sleep() sets the CHN_F_SLEEPING flag while waiting for cv_timedwait_sig() to return, we can test this flag in pcm_unregister() (called during detach) and wakeup the sleeping thread(s) to immediately kill the channel(s) being consumed. Sponsored by: The FreeBSD Foundation MFC after: 2 months PR: 194727 Reviewed by: dev_submerge.ch, bapt, markj Differential Revision: https://reviews.freebsd.org/D43545		2024-04-11 20:06:50 +02:00
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doc	Grammar fix in share/doc/IPv6/IMPLEMENTATION	2024-02-13 15:16:01 +08:00
dtrace
examples	share/examples/sound: Fix spelling "controller"	2024-02-13 14:18:04 +08:00
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man	sound: Implement asynchronous device detach	2024-04-11 20:06:50 +02:00
misc	Add OpenBSD 7.5 to bsd-family-tree	2024-04-05 15:33:48 +02:00
mk	config.mk: Add MK_VIMAGE knob	2024-04-09 13:05:56 -04:00
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skel	dot.profile: handle symlinked $HOME	2024-02-13 13:24:22 -05:00
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