projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 1991-2019 Free Software Foundation, Inc. |
| 3dadfa7e | 2 | |
| ebbad4cc | 3 | This file is part of the GNU C Library. |
| 28f540f4 | 4 | |
| ebbad4cc | 5 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 28f540f4 | 9 | |
| ebbad4cc UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 28f540f4 | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 28f540f4 | 18 | |
| 28f540f4 RM |
19 | #include <errno.h> |
| 20 | #include <hurd.h> | |
| 21 | #include <hurd/signal.h> | |
| 22 | #include <hurd/msg.h> | |
| 23 | ||
| 24 | /* Change the set of blocked signals to SET, | |
| 25 | wait until a signal arrives, and restore the set of blocked signals. */ | |
| 26 | int | |
| bd2260a2 | 27 | __sigsuspend (const sigset_t *set) |
| 28f540f4 RM |
28 | { |
| 29 | struct hurd_sigstate *ss; | |
| 30 | sigset_t newmask, oldmask, pending; | |
| 31 | mach_port_t wait; | |
| 32 | mach_msg_header_t msg; | |
| 33 | ||
| 34 | if (set != NULL) | |
| 35 | /* Crash before locking. */ | |
| 36 | newmask = *set; | |
| 37 | ||
| 38 | /* Get a fresh port we will wait on. */ | |
| 39 | wait = __mach_reply_port (); | |
| 40 | ||
| 41 | ss = _hurd_self_sigstate (); | |
| 42 | ||
| 43 | __spin_lock (&ss->lock); | |
| 44 | ||
| 45 | oldmask = ss->blocked; | |
| 46 | if (set != NULL) | |
| 47 | /* Change to the new blocked signal mask. */ | |
| 48 | ss->blocked = newmask & ~_SIG_CANT_MASK; | |
| 49 | ||
| 50 | /* Notice if any pending signals just became unblocked. */ | |
| 51 | pending = ss->pending & ~ss->blocked; | |
| 52 | ||
| 53 | /* Tell the signal thread to message us when a signal arrives. */ | |
| 54 | ss->suspended = wait; | |
| 55 | __spin_unlock (&ss->lock); | |
| 56 | ||
| 57 | if (pending) | |
| 58 | /* Tell the signal thread to check for pending signals. */ | |
| 8f0c527e | 59 | __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); |
| 28f540f4 RM |
60 | |
| 61 | /* Wait for the signal thread's message. */ | |
| 62 | __mach_msg (&msg, MACH_RCV_MSG, 0, sizeof (msg), wait, | |
| 63 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
| 64 | __mach_port_destroy (__mach_task_self (), wait); | |
| 65 | ||
| 66 | __spin_lock (&ss->lock); | |
| 67 | ss->blocked = oldmask; /* Restore the old mask. */ | |
| 68 | pending = ss->pending & ~ss->blocked; /* Again check for pending signals. */ | |
| 69 | __spin_unlock (&ss->lock); | |
| 70 | ||
| 71 | if (pending) | |
| 72 | /* Tell the signal thread to check for pending signals. */ | |
| 8f0c527e RM |
73 | __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); |
| 74 | ||
| 28f540f4 RM |
75 | /* We've been interrupted! And a good thing, too. |
| 76 | Otherwise we'd never return. | |
| 77 | That's right; this function always returns an error. */ | |
| 78 | errno = EINTR; | |
| 79 | return -1; | |
| 80 | } | |
| 37ba7d66 | 81 | libc_hidden_def (__sigsuspend) |
| a9ddb793 | 82 | weak_alias (__sigsuspend, sigsuspend) |