| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| #include <errno.h> |
| #include <signal.h> |
| #include <string.h> |
| #include <time.h> |
| |
| int __rt_sigtimedwait(const sigset_t *uthese, siginfo_t *uinfo, const struct timespec *uts, size_t sigsetsize); |
| |
| /* ok, this is really subtle: <asm/signal.h> defines sigset_t differently |
| * when you're in the kernel or in the C library. |
| * |
| * in the kernel, this is an array of 2 32-bit unsigned longs |
| * in the C library, this is a single 32-bit unsigned long |
| * |
| * moreover, the kernel implementation of rt_sigtimedwait doesn't |
| * accept anything except kernel-sized signal sets (probably a bug !) |
| * |
| * we thus need to create a fake kernel sigset !! |
| */ |
| |
| int sigwait(const sigset_t *set, int *sig) |
| { |
| int ret; |
| /* use a union to get rid of aliasing warnings */ |
| union { |
| unsigned long kernel_sigset[2]; |
| sigset_t dummy_sigset; |
| } u; |
| |
| u.kernel_sigset[0] = *set; |
| u.kernel_sigset[1] = 0; /* no real-time signals supported ? */ |
| for (;;) |
| { |
| /* __rt_sigtimedwait can return EAGAIN or EINTR, we need to loop |
| * around them since sigwait is only allowed to return EINVAL |
| */ |
| ret = __rt_sigtimedwait ( &u.dummy_sigset, NULL, NULL, sizeof(u.kernel_sigset)); |
| if (ret >= 0) |
| break; |
| |
| if (errno != EAGAIN && errno != EINTR) |
| return errno; |
| } |
| |
| *sig = ret; |
| return 0; |
| } |
| |