# pthread-thread.m4 serial 2

dnl Copyright (C) 2019-2020 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_PTHREAD_THREAD],

[

  AC_REQUIRE([gl_PTHREAD_H])

  AC_REQUIRE([AC_CANONICAL_HOST])

  if { case "$host_os" in mingw*) true;; *) false;; esac; } \

     && test $gl_threads_api = windows; then

    dnl Choose function names that don't conflict with the mingw-w64 winpthreads

    dnl library.

    REPLACE_PTHREAD_CREATE=1

    REPLACE_PTHREAD_ATTR_INIT=1

    REPLACE_PTHREAD_ATTR_GETDETACHSTATE=1

    REPLACE_PTHREAD_ATTR_SETDETACHSTATE=1

    REPLACE_PTHREAD_ATTR_DESTROY=1

    REPLACE_PTHREAD_SELF=1

    REPLACE_PTHREAD_EQUAL=1

    REPLACE_PTHREAD_DETACH=1

    REPLACE_PTHREAD_JOIN=1

    REPLACE_PTHREAD_EXIT=1

  else

    if test $HAVE_PTHREAD_H = 0; then

      HAVE_PTHREAD_CREATE=0

      HAVE_PTHREAD_ATTR_INIT=0

      HAVE_PTHREAD_ATTR_GETDETACHSTATE=0

      HAVE_PTHREAD_ATTR_SETDETACHSTATE=0

      HAVE_PTHREAD_ATTR_DESTROY=0

      HAVE_PTHREAD_SELF=0

      HAVE_PTHREAD_EQUAL=0

      HAVE_PTHREAD_DETACH=0

      HAVE_PTHREAD_JOIN=0

      HAVE_PTHREAD_EXIT=0

    else

      dnl On HP-UX 11.11, pthread_create() and pthread_attr_init() are only

      dnl defined as inline functions.

      AC_CACHE_CHECK([whether pthread_create exists as a global function],

        [gl_cv_func_pthread_create],

        [saved_LIBS="$LIBS"

         LIBS="$LIBS $LIBPMULTITHREAD"

         AC_LINK_IFELSE(

           [AC_LANG_SOURCE(

              [[extern

                #ifdef __cplusplus

                "C"

                #endif

                int pthread_create (void);

                int main ()

                {

                  return pthread_create ();

                }

              ]])],

           [gl_cv_func_pthread_create=yes],

           [gl_cv_func_pthread_create=no])

         LIBS="$saved_LIBS"

        ])

      if test $gl_cv_func_pthread_create = no; then

        REPLACE_PTHREAD_CREATE=1

        REPLACE_PTHREAD_ATTR_INIT=1

        AC_DEFINE([PTHREAD_CREATE_IS_INLINE], [1],

          [Define if pthread_create is an inline function.])

      fi

    fi

  fi

])