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locks; strict; comment @// @; 1.1 date 2013.02.16.15.06.52; author jmmv; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 2013.02.16.15.06.52; author jmmv; state Exp; branches 1.1.1.1.4.1 1.1.1.1.12.1; next ; 1.1.1.1.4.1 date 2013.02.16.15.06.52; author tls; state dead; branches; next 1.1.1.1.4.2; 1.1.1.1.4.2 date 2013.02.25.00.26.42; author tls; state Exp; branches; next ; 1.1.1.1.12.1 date 2013.02.16.15.06.52; author yamt; state dead; branches; next 1.1.1.1.12.2; commitid p2kNxjwDaLpR8yBx; 1.1.1.1.12.2 date 2014.05.22.15.49.33; author yamt; state Exp; branches; next ; commitid p2kNxjwDaLpR8yBx; desc @@ 1.1 log @Initial revision @ text @// Copyright 2011 Google Inc. // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // * Neither the name of Google Inc. nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include #include #include "stack_cleaner.hpp" #include "state.ipp" /// Internal implementation for lutok::stack_cleaner. struct lutok::stack_cleaner::impl { /// Reference to the Lua state this stack_cleaner refers to. state& state_ref; /// The depth of the Lua stack to be restored. unsigned int original_depth; /// Constructor. /// /// \param state_ref_ Reference to the Lua state. /// \param original_depth_ The depth of the Lua stack. impl(state& state_ref_, const unsigned int original_depth_) : state_ref(state_ref_), original_depth(original_depth_) { } }; /// Creates a new stack cleaner. /// /// This gathers the current height of the stack so that extra elements can be /// popped during destruction. /// /// \param state_ The Lua state. lutok::stack_cleaner::stack_cleaner(state& state_) : _pimpl(new impl(state_, state_.get_top())) { } /// Pops any values from the stack not known at construction time. /// /// \pre The current height of the stack must be equal or greater to the height /// of the stack when this object was instantiated. lutok::stack_cleaner::~stack_cleaner(void) { const unsigned int current_depth = _pimpl->state_ref.get_top(); assert(current_depth >= _pimpl->original_depth); const unsigned int diff = current_depth - _pimpl->original_depth; if (diff > 0) _pimpl->state_ref.pop(diff); } /// Forgets about any elements currently in the stack. /// /// This allows a function to return values on the stack because all the /// elements that are currently in the stack will not be touched during /// destruction when the function is called. void lutok::stack_cleaner::forget(void) { _pimpl->original_depth = _pimpl->state_ref.get_top(); } @ 1.1.1.1 log @Initial import of Lutok, version 0.2. This is a required component of Kyua and its build will be guarded by the MKKYUA knob. core@@ has approved this import. Description: Lutok is a lightweight C++ API library for Lua. Lutok provides thin C++ wrappers around the Lua C API to ease the interaction between C++ and Lua. These wrappers make intensive use of RAII to prevent resource leakage, expose C++-friendly data types, report errors by means of exceptions and ensure that the Lua stack is always left untouched in the face of errors. The library also provides a small subset of miscellaneous utility functions built on top of the wrappers. Lutok focuses on providing a clean and safe C++ interface; the drawback is that it is not suitable for performance-critical environments. In order to implement error-safe C++ wrappers on top of a Lua C binary library, Lutok adds several layers or abstraction and error checking that go against the original spirit of the Lua C API and thus degrade performance. @ text @@ 1.1.1.1.12.1 log @file stack_cleaner.cpp was added on branch yamt-pagecache on 2014-05-22 15:49:33 +0000 @ text @d1 91 @ 1.1.1.1.12.2 log @sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments") @ text @a0 91 // Copyright 2011 Google Inc. // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // * Neither the name of Google Inc. nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include #include #include "stack_cleaner.hpp" #include "state.ipp" /// Internal implementation for lutok::stack_cleaner. struct lutok::stack_cleaner::impl { /// Reference to the Lua state this stack_cleaner refers to. state& state_ref; /// The depth of the Lua stack to be restored. unsigned int original_depth; /// Constructor. /// /// \param state_ref_ Reference to the Lua state. /// \param original_depth_ The depth of the Lua stack. impl(state& state_ref_, const unsigned int original_depth_) : state_ref(state_ref_), original_depth(original_depth_) { } }; /// Creates a new stack cleaner. /// /// This gathers the current height of the stack so that extra elements can be /// popped during destruction. /// /// \param state_ The Lua state. lutok::stack_cleaner::stack_cleaner(state& state_) : _pimpl(new impl(state_, state_.get_top())) { } /// Pops any values from the stack not known at construction time. /// /// \pre The current height of the stack must be equal or greater to the height /// of the stack when this object was instantiated. lutok::stack_cleaner::~stack_cleaner(void) { const unsigned int current_depth = _pimpl->state_ref.get_top(); assert(current_depth >= _pimpl->original_depth); const unsigned int diff = current_depth - _pimpl->original_depth; if (diff > 0) _pimpl->state_ref.pop(diff); } /// Forgets about any elements currently in the stack. /// /// This allows a function to return values on the stack because all the /// elements that are currently in the stack will not be touched during /// destruction when the function is called. void lutok::stack_cleaner::forget(void) { _pimpl->original_depth = _pimpl->state_ref.get_top(); } @ 1.1.1.1.4.1 log @file stack_cleaner.cpp was added on branch tls-maxphys on 2013-02-25 00:26:42 +0000 @ text @d1 91 @ 1.1.1.1.4.2 log @resync with head @ text @a0 91 // Copyright 2011 Google Inc. // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // * Neither the name of Google Inc. nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include #include #include "stack_cleaner.hpp" #include "state.ipp" /// Internal implementation for lutok::stack_cleaner. struct lutok::stack_cleaner::impl { /// Reference to the Lua state this stack_cleaner refers to. state& state_ref; /// The depth of the Lua stack to be restored. unsigned int original_depth; /// Constructor. /// /// \param state_ref_ Reference to the Lua state. /// \param original_depth_ The depth of the Lua stack. impl(state& state_ref_, const unsigned int original_depth_) : state_ref(state_ref_), original_depth(original_depth_) { } }; /// Creates a new stack cleaner. /// /// This gathers the current height of the stack so that extra elements can be /// popped during destruction. /// /// \param state_ The Lua state. lutok::stack_cleaner::stack_cleaner(state& state_) : _pimpl(new impl(state_, state_.get_top())) { } /// Pops any values from the stack not known at construction time. /// /// \pre The current height of the stack must be equal or greater to the height /// of the stack when this object was instantiated. lutok::stack_cleaner::~stack_cleaner(void) { const unsigned int current_depth = _pimpl->state_ref.get_top(); assert(current_depth >= _pimpl->original_depth); const unsigned int diff = current_depth - _pimpl->original_depth; if (diff > 0) _pimpl->state_ref.pop(diff); } /// Forgets about any elements currently in the stack. /// /// This allows a function to return values on the stack because all the /// elements that are currently in the stack will not be touched during /// destruction when the function is called. void lutok::stack_cleaner::forget(void) { _pimpl->original_depth = _pimpl->state_ref.get_top(); } @