Added support for shm_open(SHM_ANON) extension.

auto/shmem

@@ -85,6 +85,29 @@ 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() {
+                      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()"

src/go/unit/nxt_go_port_memory.c

@@ -64,6 +64,18 @@ nxt_go_new_port_mmap(nxt_go_process_t *process, nxt_port_id_t id,
 
     nxt_go_debug("memfd_create(%s): %d", name, fd);
 
+#elif (NXT_HAVE_SHM_OPEN_ANON)
+
+    fd = shm_open(SHM_ANON, O_RDWR, S_IRUSR | S_IWUSR);
+
+    nxt_go_debug("shm_open(SHM_ANON): %d", fd);
+
+    if (nxt_slow_path(fd == -1)) {
+        nxt_go_warn("shm_open(SHM_ANON) failed %d", errno);
+
+        goto remove_fail;
+    }
+
 #elif (NXT_HAVE_SHM_OPEN)
 
     /* Just in case. */

src/nxt_port_memory.c

@@ -297,6 +297,18 @@ nxt_port_new_port_mmap(nxt_task_t *task, nxt_process_t *process,
 
     nxt_debug(task, "memfd_create(%s): %FD", name, fd);
 
+#elif (NXT_HAVE_SHM_OPEN_ANON)
+
+    fd = shm_open(SHM_ANON, O_RDWR, S_IRUSR | S_IWUSR);
+
+    nxt_debug(task, "shm_open(SHM_ANON): %FD", fd);
+
+    if (nxt_slow_path(fd == -1)) {
+        nxt_alert(task, "shm_open(SHM_ANON) failed %E", nxt_errno);
+
+        goto remove_fail;
+    }
+
 #elif (NXT_HAVE_SHM_OPEN)
 
     /* Just in case. */