src/security/LockingPointer.h

   1 #ifndef SQUID_SRC_SECURITY_LOCKINGPOINTER_H
   2 #define SQUID_SRC_SECURITY_LOCKINGPOINTER_H
   3
   4 #include "base/TidyPointer.h"
   5
   6 namespace Security
   7 {
   8
   9 /**
  10   * Add SSL locking (a.k.a. reference counting) to TidyPointer
  11   */
  12 template <typename T, void (*DeAllocator)(T *t), int lock>
  13 class LockingPointer: public TidyPointer<T, DeAllocator>
  14 {
  15 public:
  16     typedef TidyPointer<T, DeAllocator> Parent;
  17
  18     LockingPointer(T *t = nullptr): Parent(t) {}
  19
  20     void resetAndLock(T *t) {
  21         if (t != this->get()) {
  22             this->reset(t);
  23 #if USE_OPENSSL
  24             if (t)
  25                 CRYPTO_add(&t->references, 1, lock);
  26 #elif USE_GNUTLS
  27             // XXX: GnuTLS does not provide locking ?
  28 #else
  29             assert(false);
  30 #endif
  31         }
  32     }
  33 };
  34
  35 } // namespace Security
  36
  37 #endif /* SQUID_SRC_SECURITY_LOCKINGPOINTER_H */
  38