| 1 | /* Set a thread's signal state. Hurd on Mach version. |
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| 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <pthread.h> |
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| 20 | #include <assert.h> |
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| 21 | #include <signal.h> |
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| 22 | #include <hurd/signal.h> |
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| 23 | #include <hurd/msg.h> |
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| 24 | |
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| 25 | #include <pt-internal.h> |
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| 26 | |
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| 27 | error_t |
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| 28 | __pthread_sigstate (struct __pthread *thread, int how, |
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| 29 | const sigset_t *set, sigset_t *oset, int clear_pending) |
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| 30 | { |
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| 31 | error_t err = 0; |
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| 32 | struct hurd_sigstate *ss; |
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| 33 | sigset_t old, new; |
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| 34 | sigset_t pending; |
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| 35 | |
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| 36 | if (set != NULL) |
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| 37 | new = *set; |
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| 38 | |
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| 39 | ss = _hurd_thread_sigstate (thread->kernel_thread); |
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| 40 | assert (ss); |
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| 41 | |
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| 42 | _hurd_sigstate_lock (ss); |
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| 43 | |
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| 44 | old = ss->blocked; |
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| 45 | |
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| 46 | if (set != NULL) |
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| 47 | { |
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| 48 | switch (how) |
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| 49 | { |
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| 50 | case SIG_BLOCK: |
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| 51 | ss->blocked |= new; |
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| 52 | break; |
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| 53 | |
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| 54 | case SIG_SETMASK: |
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| 55 | ss->blocked = new; |
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| 56 | break; |
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| 57 | |
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| 58 | case SIG_UNBLOCK: |
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| 59 | ss->blocked &= ~new; |
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| 60 | break; |
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| 61 | |
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| 62 | default: |
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| 63 | err = EINVAL; |
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| 64 | break; |
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| 65 | } |
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| 66 | ss->blocked &= ~_SIG_CANT_MASK; |
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| 67 | } |
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| 68 | |
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| 69 | if (!err && clear_pending) |
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| 70 | __sigemptyset (set: &ss->pending); |
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| 71 | |
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| 72 | pending = _hurd_sigstate_pending (ss) & ~ss->blocked; |
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| 73 | _hurd_sigstate_unlock (ss); |
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| 74 | |
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| 75 | if (!err && oset != NULL) |
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| 76 | *oset = old; |
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| 77 | |
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| 78 | if (!err && pending) |
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| 79 | /* Send a message to the signal thread so it |
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| 80 | will wake up and check for pending signals. */ |
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| 81 | __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); |
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| 82 | |
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| 83 | return err; |
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| 84 | } |
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| 85 | |
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