allanger/ardour
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Activity

Fix window process thread priorities

Browse Source 
While POSIX defines a single contiguous range of numbers that
determine a thread's priority. Win32 defines priority classes
and priority levels relative to these classes.

pthread maps those to -15 .. +15 with the top six ones
corresponding to REALTIME_PRIORITY_CLASS and max being
THREAD_PRIORITY_TIME_CRITICAL

Note that the PA backend can USE_MMCSS_THREAD_PRIORITIES
and PBD::MMCSS::set_thread_characteristics() directly for
the I/O threads.
This commit is contained in:
Robin Gareus
2021-05-14 01:59:20 +02:00
parent 4d269729b1
commit 28619fe71b
2 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
libs/pbd/pthread_utils.cc
View File

@@ -288,18 +288,19 @@ pbd_absolute_rt_priority (int policy, int priority)
/* use default. XXX this should be relative to audio (JACK) thread,
* internal backends use -20 (Audio), -21 (MIDI), -22 (compuation)
*/
priority = 7; // BaseUI backwards compat.
}
if (priority > 0) {
priority = (p_min + p_max) / 2;
} else if (priority > 0) {
priority += p_min;
} else {
priority += p_max;
priority += p_max + 1;
}
if (priority > p_max)
if (priority > p_max) {
priority = p_max;
if (priority < p_min)
}
if (priority < p_min) {
priority = p_min;
}
return priority;
}