posix: sysconf: add a "small" implementation option #69882
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Was hoping to tag @awojasinski for review here as well. |
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ycsin
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Mar 11, 2024
include/zephyr/posix/unistd.h
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| @@ -99,6 +99,7 @@ extern "C" { | |||
| #define _POSIX2_C_BIND _POSIX_VERSION | |||
| #define _POSIX2_C_DEV (-1L) | |||
| #define _POSIX2_CHAR_TERM (-1L) | |||
| #define _POSIX2_DELAYTIMER_MAX (-1L) | |||
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| #define _POSIX2_DELAYTIMER_MAX (-1L) | |
| #define _POSIX2_DELAYTIMER_MAX (-1L) |
Previously, sysconf() was only available as a macro (i.e. the "extra-small" option). This has the advantage of being compile-time constant, and optimized for both space and speed. One disadvantage is that querying an `_SC_` value that was invalid or unsupported would result in a compile error. Provide a "small" implementation of sysconf() (via Kconfig choice) as a normal addressable function. Signed-off-by: Christopher Friedt <[email protected]>
cfriedt
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Mar 11, 2024
ycsin
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Mar 12, 2024
jukkar
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Mar 12, 2024
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Previously,
sysconf()was only available as a macro (i.e. the "extra-small" option).That has the advantage of being compile-time constant, optimized for both space and speed. One disadvantage is that a querying an
_SC_value that was invalid or unsupported would result in a compile error.Provide a "small" implementation of
sysconf()(via Kconfig choice) as a normal addressable function.See also #56670