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tools/nolibc/types: make FD_SETSIZE configurable

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The macro was hard-coded to 256 but it's common to see it redefined.
Let's support this and make sure we always allocate enough entries for
the cases where it wouldn't be multiple of 32.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Willy Tarreau 2022-02-13 09:53:01 +01:00 • committed by Paul E. McKenney
parent 8cb98b3fce
commit 306c9fd4c6
1 changed files with 4 additions and 2 deletions
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6
tools/include/nolibc/types.h
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@ -45,7 +45,9 @@
#define DT_SOCK 0xc
/* commonly an fd_set represents 256 FDs */
#ifndef FD_SETSIZE
#define FD_SETSIZE 256
#endif
/* Special FD used by all the *at functions */
#ifndef AT_FDCWD
@ -72,7 +74,7 @@
/* for select() */
typedef struct {
uint32_t fd32[FD_SETSIZE / 32];
uint32_t fd32[(FD_SETSIZE + 31) / 32];
} fd_set;
#define FD_CLR(fd, set) do { \
@ -101,7 +103,7 @@ typedef struct {
#define FD_ZERO(set) do { \
fd_set *__set = (set); \
int __idx; \
for (__idx = 0; __idx < FD_SETSIZE / 32; __idx ++) \
for (__idx = 0; __idx < (FD_SETSIZE+31) / 32; __idx ++) \
__set->fd32[__idx] = 0; \
} while (0)