diff options
Diffstat (limited to 'libc/signal/sigwait.c')
| -rw-r--r-- | libc/signal/sigwait.c | 83 |
1 files changed, 76 insertions, 7 deletions
diff --git a/libc/signal/sigwait.c b/libc/signal/sigwait.c index d0421f3d3..8fd7ea81f 100644 --- a/libc/signal/sigwait.c +++ b/libc/signal/sigwait.c @@ -1,7 +1,8 @@ /* vi: set sw=4 ts=4: */ /* sigwait * - * Copyright (C) 2003 by Erik Andersen <andersen@uclibc.org> + * Copyright (C) 2006 by Steven J. Hill <sjhill@realitydiluted.com> + * Copyright (C) 2003-2005 by Erik Andersen <andersen@uclibc.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -23,19 +24,86 @@ #include <string.h> #include <unistd.h> -#if defined __UCLIBC_HAS_REALTIME__ +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include <sysdep-cancel.h> -int sigwait(const sigset_t *set, int *sig) +# ifdef __NR_rt_sigtimedwait + +/* Return any pending signal or wait for one for the given time. */ +static int do_sigwait(const sigset_t *set, int *sig) +{ + int ret; + +# ifdef SIGCANCEL + sigset_t tmpset; + if (set != NULL + && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + /* Create a temporary mask without the bit for SIGCANCEL set. */ + // We are not copying more than we have to. + memcpy(&tmpset, set, _NSIG / 8); + __sigdelset(&tmpset, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset(&tmpset, SIGSETXID); +# endif + set = &tmpset; + } +# endif + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + INTERNAL_SYSCALL_DECL(err); + do + ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set, NULL, + NULL, _NSIG / 8); + while (INTERNAL_SYSCALL_ERROR_P (ret, err) + && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR); + if (! INTERNAL_SYSCALL_ERROR_P (ret, err)) + { + *sig = ret; + ret = 0; + } +else + ret = INTERNAL_SYSCALL_ERRNO (ret, err); + + return ret; +} + +int sigwait (const sigset_t *set, int *sig) +{ + if(SINGLE_THREAD_P) + return do_sigwait(set, sig); + + int oldtype = LIBC_CANCEL_ASYNC(); + + int result = do_sigwait(set, sig); + + LIBC_CANCEL_RESET(oldtype); + + return result; +} +# else /* __NR_rt_sigtimedwait */ +# error We must have rt_sigtimedwait defined!!! +# endif +#else /* __UCLIBC_HAS_THREADS_NATIVE__ */ + +# if defined __UCLIBC_HAS_REALTIME__ + +int sigwait (const sigset_t *set, int *sig) { - int ret = sigwaitinfo(set, NULL); - if (ret != -1) { + int ret = 1; + if ((ret = sigwaitinfo(set, NULL)) != -1) { *sig = ret; return 0; } return 1; } -#else /* __UCLIBC_HAS_REALTIME__ */ +# else /* __UCLIBC_HAS_REALTIME__ */ /* variant without REALTIME extensions */ static smallint was_sig; /* obviously not thread-safe */ @@ -95,4 +163,5 @@ int sigwait (const sigset_t *set, int *sig) *sig = was_sig; return was_sig == -1 ? -1 : 0; } -#endif /* __UCLIBC_HAS_REALTIME__ */ +# endif /* __UCLIBC_HAS_REALTIME__ */ +#endif /* __UCLIBC_HAS_THREADS_NATIVE__ */ |