diff options
Diffstat (limited to 'libc/signal/sigwait.c')
| -rw-r--r-- | libc/signal/sigwait.c | 82 |
1 files changed, 78 insertions, 4 deletions
diff --git a/libc/signal/sigwait.c b/libc/signal/sigwait.c index 13d65ed5e..c8a93dfb2 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 @@ -24,7 +25,81 @@ #include <signal.h> #include <string.h> -#undef sigwait +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include <sysdep-cancel.h> + +# 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. +# ifdef IS_IN_libc + __memcpy(&tmpset, set, _NSIG / 8); +# else + memcpy(&tmpset, set, _NSIG / 8); +# endif + __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. */ +# ifdef INTERNAL_SYSCALL + 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); +# else +# error INTERNAL_SYSCALL must be defined!!! +# endif + + 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 +# error We must have rt_sigtimedwait defined!!! +# endif +#else +# undef sigwait int attribute_hidden __sigwait (const sigset_t *set, int *sig) { int ret = 1; @@ -34,6 +109,5 @@ int attribute_hidden __sigwait (const sigset_t *set, int *sig) } return 1; } - -/* psm: keep this weak, because the one in libpthread.so could overwrite it */ +#endif weak_alias(__sigwait, sigwait) |