m4/pthread-spin.m4

   1 # pthread-spin.m4 serial 2
   2 dnl Copyright (C) 2019-2021 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_PTHREAD_SPIN],
   8 [
   9   AC_REQUIRE([gl_PTHREAD_H])
  10   AC_REQUIRE([AC_CANONICAL_HOST])
  11
  12   if { case "$host_os" in mingw*) true;; *) false;; esac; } \
  13      && test $gl_threads_api = windows; then
  14     dnl Choose function names that don't conflict with the mingw-w64 winpthreads
  15     dnl library.
  16     REPLACE_PTHREAD_SPIN_INIT=1
  17     REPLACE_PTHREAD_SPIN_LOCK=1
  18     REPLACE_PTHREAD_SPIN_TRYLOCK=1
  19     REPLACE_PTHREAD_SPIN_UNLOCK=1
  20     REPLACE_PTHREAD_SPIN_DESTROY=1
  21   else
  22     if test $HAVE_PTHREAD_H = 0 || test $HAVE_PTHREAD_SPINLOCK_T = 0; then
  23       HAVE_PTHREAD_SPIN_INIT=0
  24       HAVE_PTHREAD_SPIN_LOCK=0
  25       HAVE_PTHREAD_SPIN_TRYLOCK=0
  26       HAVE_PTHREAD_SPIN_UNLOCK=0
  27       HAVE_PTHREAD_SPIN_DESTROY=0
  28     fi
  29   fi
  30 ])