Annotation of prex/usr/lib/posix/signal/sigprocmask.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 2005, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <prex/signal.h>
! 31:
! 32: #include <stddef.h>
! 33: #include <signal.h>
! 34: #include <errno.h>
! 35:
! 36: int
! 37: sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
! 38: {
! 39: sigset_t newset = 0;
! 40:
! 41: if (set != NULL)
! 42: newset = *set;
! 43:
! 44: SIGNAL_LOCK();
! 45:
! 46: if (oldset != NULL)
! 47: *oldset = __sig_mask;
! 48:
! 49: if (set != NULL) {
! 50: switch (how) {
! 51: case SIG_BLOCK:
! 52: __sig_mask |= newset;
! 53: break;
! 54: case SIG_UNBLOCK:
! 55: __sig_mask &= ~newset;
! 56: break;
! 57: case SIG_SETMASK:
! 58: __sig_mask = newset;
! 59: break;
! 60: default:
! 61: SIGNAL_UNLOCK();
! 62: errno = EINVAL;
! 63: return -1;
! 64: }
! 65: }
! 66: __sig_mask &= ~(sigmask(SIGSTOP) | sigmask(SIGKILL));
! 67:
! 68: SIGNAL_UNLOCK();
! 69:
! 70: /* Process pending signal */
! 71: __sig_flush();
! 72:
! 73: return 0;
! 74: }
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