src/hotspot/share/classfile/classLoader.inline.hpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_CLASSFILE_CLASSLOADER_INLINE_HPP
#define SHARE_CLASSFILE_CLASSLOADER_INLINE_HPP

#include "classfile/classLoader.hpp"

#include "runtime/atomic.hpp"

// Next entry in class path
inline ClassPathEntry* ClassPathEntry::next() const { return Atomic::load_acquire(&_next); }

inline void ClassPathEntry::set_next(ClassPathEntry* next) {
  // may have unlocked readers, so ensure visibility.
  Atomic::release_store(&_next, next);
}

inline ClassPathEntry* ClassLoader::classpath_entry(int n) {
  assert(n >= 0, "sanity");
  if (n == 0) {
    assert(has_jrt_entry(), "No class path entry at 0 for exploded module builds");
    return ClassLoader::_jrt_entry;
  } else {
    // The java runtime image is always the first entry
    // in the FileMapInfo::_classpath_entry_table. Even though
    // the _jrt_entry is not included in the _first_append_entry
    // linked list, it must be accounted for when comparing the
    // class path vs. the shared archive class path.
    ClassPathEntry* e = first_append_entry();
    while (--n >= 1) {
      assert(e != nullptr, "Not that many classpath entries.");
      e = e->next();
    }
    return e;
  }
}

#endif // SHARE_CLASSFILE_CLASSLOADER_INLINE_HPP