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66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* Block a thread with a timeout. Mach version.
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Copyright (C) 2000-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/time.h>
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#include <mach.h>
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#include <mach/message.h>
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#include <pt-internal.h>
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/* Block THREAD. */
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error_t
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__pthread_timedblock (struct __pthread *thread,
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const struct timespec *abstime, clockid_t clock_id)
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{
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error_t err;
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mach_msg_header_t msg;
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mach_msg_timeout_t timeout;
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struct timespec now;
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/* We have an absolute time and now we have to convert it to a
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relative time. Arg. */
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err = __clock_gettime (clock_id, &now);
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assert (!err);
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if (now.tv_sec > abstime->tv_sec
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|| (now.tv_sec == abstime->tv_sec && now.tv_nsec > abstime->tv_nsec))
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return ETIMEDOUT;
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timeout = (abstime->tv_sec - now.tv_sec) * 1000;
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if (abstime->tv_nsec >= now.tv_nsec)
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timeout += (abstime->tv_nsec - now.tv_nsec + 999999) / 1000000;
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else
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/* Need to do a carry. */
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timeout -= (now.tv_nsec - abstime->tv_nsec + 999999) / 1000000;
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err = __mach_msg (&msg, MACH_RCV_MSG | MACH_RCV_TIMEOUT, 0,
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sizeof msg, thread->wakeupmsg.msgh_remote_port,
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timeout, MACH_PORT_NULL);
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if (err == EMACH_RCV_TIMED_OUT)
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return ETIMEDOUT;
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assert_perror (err);
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return 0;
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}
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