scoped_nss_types.h

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CRYPTO_SCOPED_NSS_TYPES_H_
#define CRYPTO_SCOPED_NSS_TYPES_H_

#include <keyhi.h>
#include <nss.h>
#include <pk11pub.h>
#include <plarena.h>

#include "base/memory/scoped_ptr.h"

namespace crypto {

template <typename Type, void (*Destroyer)(Type*)>
struct NSSDestroyer {
  typedef void AllowSelfReset;
  void operator()(Type* ptr) const {
    Destroyer(ptr);
  }
};

template <typename Type, void (*Destroyer)(Type*, PRBool), PRBool freeit>
struct NSSDestroyer1 {
  typedef void AllowSelfReset;
  void operator()(Type* ptr) const {
    Destroyer(ptr, freeit);
  }
};

// Define some convenient scopers around NSS pointers.
typedef scoped_ptr<PK11Context,
                   NSSDestroyer1<PK11Context, PK11_DestroyContext, PR_TRUE> >
    ScopedPK11Context;
typedef scoped_ptr<PK11SlotInfo, NSSDestroyer<PK11SlotInfo, PK11_FreeSlot> >
    ScopedPK11Slot;
typedef scoped_ptr<PK11SlotList, NSSDestroyer<PK11SlotList, PK11_FreeSlotList> >
    ScopedPK11SlotList;
typedef scoped_ptr<PK11SymKey, NSSDestroyer<PK11SymKey, PK11_FreeSymKey> >
    ScopedPK11SymKey;
typedef scoped_ptr<SECKEYPublicKey,
                   NSSDestroyer<SECKEYPublicKey, SECKEY_DestroyPublicKey> >
    ScopedSECKEYPublicKey;
typedef scoped_ptr<SECKEYPrivateKey,
                   NSSDestroyer<SECKEYPrivateKey, SECKEY_DestroyPrivateKey> >
    ScopedSECKEYPrivateKey;
typedef scoped_ptr<SECAlgorithmID,
                   NSSDestroyer1<SECAlgorithmID, SECOID_DestroyAlgorithmID,
                                 PR_TRUE> >
    ScopedSECAlgorithmID;
typedef scoped_ptr<SECItem, NSSDestroyer1<SECItem, SECITEM_FreeItem, PR_TRUE> >
    ScopedSECItem;
typedef scoped_ptr<PLArenaPool,
                   NSSDestroyer1<PLArenaPool, PORT_FreeArena, PR_FALSE> >
    ScopedPLArenaPool;

}  // namespace crypto

#endif  // CRYPTO_SCOPED_NSS_TYPES_H_