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include/sys/select.h: Define __SELECT_NUINT32 in generic way

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Support defining OPEN_MAX freely to allow increasing it from 256

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This commit is contained in:
Jukka Laitinen 2024-09-30 16:04:26 +03:00 • committed by Xiang Xiao
parent 0e87a475d3
commit c3fd827ae1
1 changed files with 1 additions and 19 deletions
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20
include/sys/select.h
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@ -49,25 +49,7 @@
* many uint32_t's do we need to span all descriptors?
*/
#if FD_SETSIZE <= 32
# define __SELECT_NUINT32 1
#elif FD_SETSIZE <= 64
# define __SELECT_NUINT32 2
#elif FD_SETSIZE <= 96
# define __SELECT_NUINT32 3
#elif FD_SETSIZE <= 128
# define __SELECT_NUINT32 4
#elif FD_SETSIZE <= 160
# define __SELECT_NUINT32 5
#elif FD_SETSIZE <= 192
# define __SELECT_NUINT32 6
#elif FD_SETSIZE <= 224
# define __SELECT_NUINT32 7
#elif FD_SETSIZE <= 256
# define __SELECT_NUINT32 8
#else
# warning "Larger fd_set needed"
#endif
#define __SELECT_NUINT32 ((FD_SETSIZE + 31) / 32)
/* These macros map a file descriptor to an index and bit number */