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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [sigset.c] - Rev 258
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/* sigset.c - signal set manipulation functions */ /* Copyright 2002, Red Hat Inc. */ /* Note: these are currently grouped together in one file so that it will override the default version in the libc/unix directory which has grouped all functions in one file. */ /* sigaddset function */ #include <signal.h> #include <bits/sigset.h> #include <errno.h> #include <string.h> #include <machine/weakalias.h> int sigaddset (sigset_t *set, const int signo) { int index, mask; __sigset_t *st = (__sigset_t *)set; if (signo > NSIG) { errno = EINVAL; return -1; } index = (signo - 1) / (8 * sizeof(long)); mask = 1 << ((signo - 1) % (8 * sizeof(long))); st->__val[index] |= mask; return 0; } /* sigdelset function */ int sigdelset (sigset_t *set, const int signo) { int index, mask; __sigset_t *st = (__sigset_t *)set; if (signo > NSIG) { errno = EINVAL; return -1; } index = (signo - 1) / (8 * sizeof(long)); mask = 1 << ((signo - 1) % (8 * sizeof(long))); st->__val[index] &= ~mask; return 0; } /* sigemptyset function */ int sigemptyset (sigset_t *set) { int size = NSIG / 8; __sigset_t *st = (__sigset_t *)set; memset (st->__val, 0, size); return 0; } /* sigfillset function */ int sigfillset (sigset_t *set) { int size = NSIG / 8; __sigset_t *st = (__sigset_t *)set; memset (st->__val, 0xff, size); return 0; } /* sigismember function */ int sigismember (const sigset_t *set, int signo) { int index, mask; __sigset_t *st = (__sigset_t *)set; if (signo > NSIG) { errno = EINVAL; return -1; } index = (signo - 1) / (8 * sizeof(long)); mask = 1 << ((signo - 1) % (8 * sizeof(long))); return (st->__val[index] & mask) != 0; }
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