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author | Roland McGrath <roland@gnu.org> | 2003-03-17 11:22:52 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 2003-03-17 11:22:52 +0000 |
commit | f3c13160fe2f53dd4971fe9772c9c23300a287be (patch) | |
tree | 6dee91780dfa4d4ac75ff1a3775a0047edfd8c3e /nptl/sysdeps/unix/sysv/linux/sem_timedwait.c | |
parent | 5778033ffc5964450a20469a142202b5fdda36da (diff) | |
download | glibc-f3c13160fe2f53dd4971fe9772c9c23300a287be.tar.gz glibc-f3c13160fe2f53dd4971fe9772c9c23300a287be.tar.xz glibc-f3c13160fe2f53dd4971fe9772c9c23300a287be.zip |
2003-03-17 Roland McGrath <roland@redhat.com>
PowerPC port contributed by Paul Mackerras <paulus@samba.org>. * sysdeps/pthread/pthread_spin_init.c: New file. * sysdeps/pthread/pthread_spin_unlock.c: New file. * sysdeps/powerpc/Makefile: New file. * sysdeps/powerpc/pthread_spin_lock.c: New file. * sysdeps/powerpc/pthread_spin_trylock.c: New file. * sysdeps/powerpc/pthreaddef.h: New file. * sysdeps/powerpc/tcb-offsets.sym: New file. * sysdeps/powerpc/td_ta_map_lwp2thr.c: New file. * sysdeps/powerpc/tls.h: New file. * sysdeps/powerpc/bits/atomic.h: New file. * sysdeps/unix/sysv/linux/libc-lowlevelmutex.c: New file. * sysdeps/unix/sysv/linux/libc-lowlevellock.c: New file. * sysdeps/unix/sysv/linux/lowlevellock.c: New file. * sysdeps/unix/sysv/linux/sem_post.c: New file. * sysdeps/unix/sysv/linux/sem_timedwait.c: New file. * sysdeps/unix/sysv/linux/sem_trywait.c: New file. * sysdeps/unix/sysv/linux/powerpc/Makefile: New file. * sysdeps/unix/sysv/linux/powerpc/createthread.c: New file. * sysdeps/unix/sysv/linux/powerpc/fork.c: New file. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: New file. * sysdeps/unix/sysv/linux/powerpc/pt-vfork.S: New file. * sysdeps/unix/sysv/linux/powerpc/pthread_once.c: New file. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: New file. * sysdeps/unix/sysv/linux/powerpc/bits/semaphore.h: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h: New file.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sem_timedwait.c')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sem_timedwait.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c b/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c new file mode 100644 index 0000000000..e1b32f4e78 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sem_timedwait.c @@ -0,0 +1,87 @@ +/* sem_timedwait -- wait on a semaphore. Generic futex-using version. + Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <sysdep.h> +#include <lowlevellock.h> +#include <internaltypes.h> +#include <semaphore.h> + +#include <shlib-compat.h> + + +int +sem_timedwait (sem_t *sem, const struct timespec *abstime) +{ + int *futex = (int *) sem; + int val; + int err; + + if (*futex > 0) + { + val = __lll_dec_if_positive (futex); + if (val > 0) + return 0; + } + + err = -EINVAL; + if (abstime->tv_nsec >= 1000000000) + goto error_return; + + do + { + struct timeval tv; + struct timespec rt; + int sec, nsec; + + /* Get the current time. */ + __gettimeofday (&tv, NULL); + + /* Compute relative timeout. */ + sec = abstime->tv_sec - tv.tv_sec; + nsec = abstime->tv_nsec - tv.tv_usec * 1000; + if (nsec < 0) + { + nsec += 1000000000; + --sec; + } + + /* Already timed out? */ + err = -ETIMEDOUT; + if (sec < 0) + goto error_return; + + /* Do wait. */ + rt.tv_sec = sec; + rt.tv_nsec = nsec; + err = lll_futex_timed_wait (futex, 0, &rt); + if (err != 0 && err != -EWOULDBLOCK) + goto error_return; + + val = __lll_dec_if_positive (futex); + } + while (val <= 0); + + return 0; + + error_return: + __set_errno (-err); + return -1; +} |