sysdeps/mach/htl/pt-block.c

   1 /* Block a thread.  Mach version.
   2    Copyright (C) 2000-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   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.
   9
  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
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21
  22 #include <mach.h>
  23 #include <mach/message.h>
  24
  25 #include <pt-internal.h>
  26
  27 #ifndef MSG_OPTIONS
  28 # define MSG_OPTIONS 0
  29 #endif
  30
  31 #ifndef RETTYPE
  32 # define RETTYPE void
  33 #endif
  34
  35 #ifndef RETURN
  36 # define RETURN(val)
  37 #endif
  38
  39 /* Block THREAD.  */
  40 RETTYPE
  41 __pthread_block (struct __pthread *thread)
  42 {
  43   mach_msg_header_t msg;
  44   error_t err;
  45
  46   err = __mach_msg (&msg, MACH_RCV_MSG | MSG_OPTIONS, 0, sizeof msg,
  47                     thread->wakeupmsg.msgh_remote_port,
  48                     MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
  49   if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
  50     RETURN(EINTR);
  51   assert_perror (err);
  52   RETURN(0);
  53 }