3 * Copyright 2003, The libsigc++ Development Team
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <sigc++/functors/slot_base.h>
28 // only MSVC needs this to guarantee that all new/delete are executed from the DLL module
29 #ifdef SIGC_NEW_DELETE_IN_LIBRARY_ONLY
30 void* slot_rep::operator new(size_t size_)
35 void slot_rep::operator delete(void* p)
41 void slot_rep::disconnect()
45 call_ = 0; // Invalidate the slot.
46 // _Must_ be done here because parent_ might defer the actual
47 // destruction of the slot_rep and try to invoke it before that point.
48 void* data_ = parent_;
49 parent_ = 0; // Just a precaution.
50 (cleanup_)(data_); // Notify the parent (might lead to destruction of this!).
57 void* slot_rep::notify(void* data)
59 slot_rep* self_ = reinterpret_cast<slot_rep*>(data);
61 self_->call_ = 0; // Invalidate the slot.
62 self_->destroy(); // Detach the stored functor from the other referred trackables and destroy it.
63 self_->disconnect(); // Disconnect the slot (might lead to deletion of self_!).
68 } // namespace internal
70 slot_base::slot_base()
75 slot_base::slot_base(rep_type* rep)
80 slot_base::slot_base(const slot_base& src)
82 blocked_(src.blocked_)
86 //Check call_ so we can ignore invalidated slots.
87 //Otherwise, destroyed bound reference parameters (whose destruction caused the slot's invalidation) may be used during dup().
88 //Note: I'd prefer to check somewhere during dup(). murrayc.
90 rep_ = src.rep_->dup();
93 *this = slot_base(); //Return the default invalid slot.
98 slot_base::~slot_base()
104 slot_base::operator bool() const
109 slot_base& slot_base::operator=(const slot_base& src)
111 if (src.rep_ == rep_) return *this;
119 internal::slot_rep* new_rep_ = src.rep_->dup();
121 if (rep_) // Silently exchange the slot_rep.
123 new_rep_->set_parent(rep_->parent_, rep_->cleanup_);
132 void slot_base::set_parent(void* parent, void* (*cleanup)(void*)) const
135 rep_->set_parent(parent, cleanup);
138 void slot_base::add_destroy_notify_callback(void* data, func_destroy_notify func) const
141 rep_->add_destroy_notify_callback(data, func);
144 void slot_base::remove_destroy_notify_callback(void* data) const
147 rep_->remove_destroy_notify_callback(data);
150 bool slot_base::block(bool should_block)
153 blocked_ = should_block;
157 bool slot_base::unblock()
162 void slot_base::disconnect()
169 /*bool slot_base::empty() const // having this function not inline is killing performance !!!
171 if (rep_ && !rep_->call_)
173 delete rep_; // This is not strictly necessary here. I'm convinced that it is
174 rep_ = 0; // safe to wait for the destructor to delete the slot_rep. Martin.