# Copyright (C) Igor Sysoev
# Copyright (C) NGINX, Inc.


# GCC 4.1+ builtin atomic operations.

nxt_feature="GCC builtin atomic operations"
nxt_feature_name=NXT_HAVE_GCC_ATOMIC
nxt_feature_run=yes
nxt_feature_incs=
nxt_feature_libs=
nxt_feature_test="int main() {
                      long  n = 0;

                      if (!__sync_bool_compare_and_swap(&n, 0, 3))
                          return 1;
                      if (__sync_fetch_and_add(&n, 1) != 3)
                          return 1;
                      if (__sync_lock_test_and_set(&n, 5) != 4)
                          return 1;
                      if (n != 5)
                          return 1;
                      __sync_lock_release(&n);
                      if (n != 0)
                          return 1;
                      return 0;
                  }"
. auto/feature


# Solaris 10 builtin atomic operations.

if [ $nxt_found = no ]; then

    nxt_feature="Solaris builtin atomic operations"
    nxt_feature_name=NXT_HAVE_SOLARIS_ATOMIC
    nxt_feature_run=yes
    nxt_feature_incs=
    nxt_feature_libs=
    nxt_feature_test="#include <atomic.h>

                      int main() {
                          ulong_t  n = 0;

                          if (atomic_cas_ulong(&n, 0, 3) != 0)
                              return 1;
                          if (atomic_add_long_nv(&n, 1) != 4)
                              return 1;
                          if (atomic_swap_ulong(&n, 5) != 4)
                              return 1;
                          if (n != 5)
                              return 1;
                          return 0;
                      }"
    . auto/feature
fi


# AIX xlC builtin atomic operations.

if [ $nxt_found = no ]; then

    if [ $NXT_64BIT = 1 ]; then
        nxt_feature_test="int main() {
                              long  n = 0;
                              long  o = 0;

                              if (!__compare_and_swaplp(&n, &o, 3))
                                  return 1;
                              if (__fetch_and_addlp(&n, 1) != 3)
                                  return 1;
                              if (__fetch_and_swaplp(&n, 5) != 4)
                                  return 1;
                              if (n != 5)
                                  return 1;
                              __isync();
                              __lwsync();
                              return 0;
                          }"
    else
        nxt_feature_test="int main() {
                              int  n = 0;
                              int  o = 0;

                              if (!__compare_and_swap(&n, &o, 3))
                                  return 1;
                              if (__fetch_and_add(&n, 1) != 3)
                                  return 1;
                              if (__fetch_and_swap(&n, 5) != 4)
                                  return 1;
                              if (n != 5)
                                  return 1;
                              __isync();
                              __lwsync();
                              return 0;
                          }"
    fi

    nxt_feature="xlC builtin atomic operations"
    nxt_feature_name=NXT_HAVE_XLC_ATOMIC
    nxt_feature_run=yes
    nxt_feature_incs=
    nxt_feature_libs=
    . auto/feature
fi


if [ $nxt_found = no ]; then
    $echo
    $echo $0: error: no atomic operations found.
    $echo
    exit 1;
fi