mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 15:00:06 +00:00
a1bdd81664
The main drive is to optimize the internal usage and required size when sigset_t is embedded in other data structures. On Linux, the current supported signal set requires up to 8 bytes (16 on mips), was lower than the user defined sigset_t (128 bytes). A new internal type internal_sigset_t is added, along with the functions to operate on it similar to the ones for sigset_t. The internal-signals.h is also refactored to remove unused functions Besides small stack usage on some functions (posix_spawn, abort) it lower the struct pthread by about 120 bytes (112 on mips). Checked on x86_64-linux-gnu. Reviewed-by: Arjun Shankar <arjun@redhat.com>
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/* Internal sigset_t definition.
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _INTERNAL_SIGSET_H
|
|
#define _INTERNAL_SIGSET_H
|
|
|
|
#include <sigsetops.h>
|
|
|
|
typedef struct
|
|
{
|
|
unsigned long int __val[__NSIG_WORDS];
|
|
} internal_sigset_t;
|
|
|
|
static inline void
|
|
internal_sigset_from_sigset (internal_sigset_t *iset, const sigset_t *set)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
while (--cnt >= 0)
|
|
iset->__val[cnt] = set->__val[cnt];
|
|
}
|
|
|
|
static inline void
|
|
internal_sigemptyset (internal_sigset_t *set)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
while (--cnt >= 0)
|
|
set->__val[cnt] = 0;
|
|
}
|
|
|
|
static inline void
|
|
internal_sigfillset (internal_sigset_t *set)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
while (--cnt >= 0)
|
|
set->__val[cnt] = ~0UL;
|
|
}
|
|
|
|
static inline int
|
|
internal_sigisemptyset (const internal_sigset_t *set)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
int ret = set->__val[--cnt];
|
|
while (ret == 0 && --cnt >= 0)
|
|
ret = set->__val[cnt];
|
|
return ret == 0;
|
|
}
|
|
|
|
static inline void
|
|
internal_sigandset (internal_sigset_t *dest, const internal_sigset_t *left,
|
|
const internal_sigset_t *right)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
while (--cnt >= 0)
|
|
dest->__val[cnt] = left->__val[cnt] & right->__val[cnt];
|
|
}
|
|
|
|
static inline void
|
|
internal_sigorset (internal_sigset_t *dest, const internal_sigset_t *left,
|
|
const internal_sigset_t *right)
|
|
{
|
|
int cnt = __NSIG_WORDS;
|
|
while (--cnt >= 0)
|
|
dest->__val[cnt] = left->__val[cnt] | right->__val[cnt];
|
|
}
|
|
|
|
static inline int
|
|
internal_sigismember (const internal_sigset_t *set, int sig)
|
|
{
|
|
unsigned long int mask = __sigmask (sig);
|
|
unsigned long int word = __sigword (sig);
|
|
return set->__val[word] & mask ? 1 : 0;
|
|
}
|
|
|
|
static inline void
|
|
internal_sigaddset (internal_sigset_t *set, int sig)
|
|
{
|
|
unsigned long int mask = __sigmask (sig);
|
|
unsigned long int word = __sigword (sig);
|
|
set->__val[word] |= mask;
|
|
}
|
|
|
|
static inline void
|
|
internal_sigdelset (internal_sigset_t *set, int sig)
|
|
{
|
|
unsigned long int mask = __sigmask (sig);
|
|
unsigned long int word = __sigword (sig);
|
|
set->__val[word] &= ~mask;
|
|
}
|
|
|
|
#endif /* _INTERNAL_SIGSET_H */
|