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


NXT_SHM_PREFIX="/"

# FreeBSD, Solaris, MacOSX

nxt_feature="shm_open()"
nxt_feature_name=NXT_HAVE_SHM_OPEN
nxt_feature_run=yes
nxt_feature_incs=
nxt_feature_libs=
nxt_feature_test="#include <sys/mman.h>
                  #include <fcntl.h>
                  #include <unistd.h>
                  #include <sys/stat.h>
                  #include <sys/types.h>

                  int main(void) {
                      int         ret;
                      static char name[] = \"/unit.configure\";

                      shm_unlink(name);

                      int fd = shm_open(name, O_CREAT | O_EXCL | O_RDWR,
                          S_IRUSR | S_IWUSR);
                      if (fd == -1)
                          return 1;

                      ret = (access(name, F_OK) == 0);
                      shm_unlink(name);

                      return ret;
                  }"
. auto/feature


if [ $nxt_found = no ]; then

    # Linux and NetBSD 7.0 shm_open() are in librt.

    nxt_feature="shm_open() in librt"
    nxt_feature_libs="-lrt"
    . auto/feature

    if [ $nxt_found = yes ]; then
        NXT_LIBRT=$nxt_feature_libs
    fi
fi


if [ $nxt_found = no ]; then

    # DragonFly has no separate namespace for shm_open().

    nxt_feature="shm_open() in /tmp directory"
    nxt_feature_libs=
    nxt_feature_test="#include <sys/mman.h>
                      #include <fcntl.h>
                      #include <sys/stat.h>
                      #include <sys/types.h>

                      int main(void) {
                          static char name[] = \"/tmp/unit.configure\";

                          shm_unlink(name);

                          int fd = shm_open(name, O_CREAT | O_EXCL | O_RDWR,
                              S_IRUSR | S_IWUSR);
                          if (fd == -1)
                              return 1;

                          shm_unlink(name);
                          return 0;
                      }"
    . auto/feature

    if [ $nxt_found = yes ]; then
        NXT_SHM_PREFIX="/tmp/"
    fi
fi

nxt_shm_open_found=$nxt_found


# FreeBSD 8.0

nxt_feature="shm_open(SHM_ANON)"
nxt_feature_name=NXT_HAVE_SHM_OPEN_ANON
nxt_feature_libs=
nxt_feature_test="#include <sys/mman.h>
                  #include <fcntl.h>
                  #include <sys/stat.h>

                  int main(void) {
                      int fd = shm_open(SHM_ANON, O_RDWR, S_IRUSR | S_IWUSR);
                      if (fd == -1)
                          return 1;

                      return 0;
                  }"
. auto/feature

if [ "$nxt_shm_open_found" = no ]; then
    nxt_shm_open_found=$nxt_found
fi


# Linux

nxt_feature="memfd_create()"
nxt_feature_name=NXT_HAVE_MEMFD_CREATE
nxt_feature_run=yes
nxt_feature_incs=
nxt_feature_libs=
nxt_feature_test="#include <linux/memfd.h>
                  #include <unistd.h>
                  #include <sys/syscall.h>

                  int main(void) {
                      static char name[] = \"/unit.configure\";

                      int fd = syscall(SYS_memfd_create, name, MFD_CLOEXEC);
                      if (fd == -1)
                          return 1;

                      return 0;
                  }"
. auto/feature


if [ "$nxt_shm_open_found$nxt_found" = nono ]; then
    $echo
    $echo $0: error: no shared memory implementation found.
    $echo
    exit 1;
fi