Closed vampiebar closed 3 years ago
I'm not sure because I have never tested on macOS, but from what I can gather the problem is probably in the poll
system call, which does not play nicely with /dev/tty
.
The Turbo Vision library has a setting to avoid reading from /dev/tty
and use standard input/output instead. Does the problem persist if you run Turbo with the environment variable TVISION_USE_STDIO
set to 1
? (in the command-line shell: TVISION_USE_STDIO=1 turbo
or export TVISION_USE_STDIO=1; turbo
)
TVISION_USE_STDIO=1 turbo or export TVISION_USE_STDIO=1; turbo
yes CPU is ok now everything is optimized.. what is missing when I do use stdio ? any side effect?
st 16. 6. 2021 v 14:57 odesílatel magiblot @.***> napsal:
I'm not sure because I have never tested on macOS, but from what I can gather the problem is probably in the poll system call, which does not play nicely with /dev/tty.
The Turbo Vision library has a setting to avoid reading from /dev/tty and use standard input/output instead. Does the problem persist if you run Turbo with the environment variable TVISION_USE_STDIO set to 1? (in the command-line shell: TVISION_USE_STDIO=1 turbo or export TVISION_USE_STDIO=1; turbo)
yes, /dev/tty and poll doesn't work together on macOS.
I use (in pspg)
<--><-->/ macOS can't use poll() on /dev/tty / <--><-->state.tty = fopen("/dev/tty", "r+");
<--><-->if (!state.tty) <--><--><-->state.tty = fopen(ttyname(fileno(stdout)), "r");
<--><-->if (!state.tty) <--><-->{ <--><--><-->if (!isatty(fileno(stderr))) <--><--><--><-->leave("missing a access to terminal device");
<--><--><-->state.tty = stderr; <--><-->}
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what is missing when I do use stdio ? any side effect?
No, in the case of Turbo there's nothing you need to worry about.
I use (in pspg)
Thanks for chiming in. Actually, I first learned about this problem when I spotted this commit in pspg: https://github.com/okbob/pspg/commit/776c8e89a062925e222bd8cc91ae238d96fb6b54
in mac os big sur cpu usage ( when only open one cc file ) 100% cpu.. What can it be the reason?