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authorKaren Arutyunov <karen@codesynthesis.com>2020-12-16 20:29:05 +0300
committerKaren Arutyunov <karen@codesynthesis.com>2021-02-24 16:40:04 +0300
commit8e761289a2446367267c6c0d9a26e734f0f78306 (patch)
treefb495d8c18801f271d124ee48731f10df396ca89 /libcutl/shared-ptr.hxx
parent4c8104756b92b9fa16b3a725e8a6aa620dfd606e (diff)
Get rid of legacy build systems and rename cutl/ to libcutl/
Diffstat (limited to 'libcutl/shared-ptr.hxx')
-rw-r--r--libcutl/shared-ptr.hxx157
1 files changed, 157 insertions, 0 deletions
diff --git a/libcutl/shared-ptr.hxx b/libcutl/shared-ptr.hxx
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+++ b/libcutl/shared-ptr.hxx
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+// file : libcutl/shared-ptr.hxx
+// license : MIT; see accompanying LICENSE file
+
+#ifndef LIBCUTL_SHARED_PTR_HXX
+#define LIBCUTL_SHARED_PTR_HXX
+
+#include <libcutl/shared-ptr/base.hxx>
+
+namespace cutl
+{
+ template <typename X>
+ class shared_ptr: bits::counter_ops<typename bits::counter_type<X>::r, X>
+ {
+ typedef bits::counter_ops<typename bits::counter_type<X>::r, X> base;
+
+ public:
+ ~shared_ptr ()
+ {
+ if (x_ != 0)
+ base::dec (x_);
+ }
+
+ explicit
+ shared_ptr (X* x = 0)
+ : base (x), x_ (x)
+ {
+ }
+
+ shared_ptr (shared_ptr const& x)
+ : base (x), x_ (x.x_)
+ {
+ if (x_ != 0)
+ base::inc (x_);
+ }
+
+ template <typename Y>
+ shared_ptr (shared_ptr<Y> const& x)
+ : base (x), x_ (x.x_)
+ {
+ if (x_ != 0)
+ base::inc (x_);
+ }
+
+ shared_ptr&
+ operator= (shared_ptr const& x)
+ {
+ if (x_ != x.x_)
+ {
+ if (x_ != 0)
+ base::dec (x_);
+
+ static_cast<base&> (*this) = x;
+ x_ = x.x_;
+
+ if (x_ != 0)
+ base::inc (x_);
+ }
+
+ return *this;
+ }
+
+ template <typename Y>
+ shared_ptr&
+ operator= (shared_ptr<Y> const& x)
+ {
+ if (x_ != x.x_)
+ {
+ if (x_ != 0)
+ base::dec (x_);
+
+ static_cast<base&> (*this) = x;
+ x_ = x.x_;
+
+ if (x_ != 0)
+ base::inc (x_);
+ }
+
+ return *this;
+ }
+
+ public:
+ X*
+ operator-> () const
+ {
+ return x_;
+ }
+
+ X&
+ operator* () const
+ {
+ return *x_;
+ }
+
+ // Conversion to bool.
+ //
+ typedef void (shared_ptr::*boolean_convertible)();
+ void true_value () {};
+
+ operator boolean_convertible () const
+ {
+ return x_ ? &shared_ptr<X>::true_value : 0;
+ }
+
+ public:
+ X*
+ get () const
+ {
+ return x_;
+ }
+
+ X*
+ release ()
+ {
+ X* r (x_);
+ x_ = 0;
+ return r;
+ }
+
+ void
+ reset (X* x = 0)
+ {
+ if (x_ != 0)
+ base::dec (x_);
+
+ base::reset (x);
+ x_ = x;
+ }
+
+ std::size_t
+ count () const
+ {
+ return x_ != 0 ? base::count (x_) : 0;
+ }
+
+ private:
+ template <typename>
+ friend class shared_ptr;
+
+ X* x_;
+ };
+
+ template <typename X, typename Y>
+ inline bool
+ operator== (const shared_ptr<X>& x, const shared_ptr<Y>& y)
+ {
+ return x.get () == y.get ();
+ }
+
+ template <typename X, typename Y>
+ inline bool
+ operator!= (const shared_ptr<X>& x, const shared_ptr<Y>& y)
+ {
+ return x.get () != y.get ();
+ }
+}
+
+#endif // LIBCUTL_SHARED_PTR_HXX