/thirdparty/breakpad/processor/static_contained_range_map.h
http://github.com/tomahawk-player/tomahawk · C Header · 96 lines · 23 code · 13 blank · 60 comment · 0 complexity · d934956723a6e613d39790393654f6b1 MD5 · raw file
- // Copyright (c) 2010, 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.
- // static_contained_range_map.h: StaticContainedRangeMap.
- //
- // StaticContainedRangeMap is similar to ContainedRangeMap. However,
- // StaticContainedRangeMap wraps a StaticMap instead of std::map, and does not
- // support dynamic operations like StoreRange(...).
- // StaticContainedRangeMap provides same RetrieveRange(...) interfaces as
- // ContainedRangeMap.
- //
- // Please see contained_range_map.h for more documentation.
- //
- // Author: Siyang Xie (lambxsy@google.com)
- #ifndef PROCESSOR_STATIC_CONTAINED_RANGE_MAP_H__
- #define PROCESSOR_STATIC_CONTAINED_RANGE_MAP_H__
- #include "processor/static_map-inl.h"
- namespace google_breakpad {
- template<typename AddressType, typename EntryType>
- class StaticContainedRangeMap {
- public:
- StaticContainedRangeMap(): base_(), entry_size_(), entry_ptr_(), map_() { }
- explicit StaticContainedRangeMap(const char *base);
- // Retrieves the most specific (smallest) descendant range encompassing
- // the specified address. This method will only return entries held by
- // child ranges, and not the entry contained by |this|. This is necessary
- // to support a sparsely-populated root range. If no descendant range
- // encompasses the address, returns false.
- bool RetrieveRange(const AddressType &address, const EntryType *&entry) const;
- private:
- friend class ModuleComparer;
- // AddressToRangeMap stores pointers. This makes reparenting simpler in
- // StoreRange, because it doesn't need to copy entire objects.
- typedef StaticContainedRangeMap* SelfPtr;
- typedef
- StaticMap<AddressType, StaticContainedRangeMap> AddressToRangeMap;
- typedef typename AddressToRangeMap::const_iterator MapConstIterator;
- // The base address of this range. The high address does not need to
- // be stored, because it is used as the key to an object in its parent's
- // map, and all ContainedRangeMaps except for the root range are contained
- // within maps. The root range does not actually contain an entry, so its
- // base_ field is meaningless, and the fact that it has no parent and thus
- // no key is unimportant. For this reason, the base_ field should only be
- // is accessed on child ContainedRangeMap objects, and never on |this|.
- AddressType base_;
- // The entry corresponding to this range. The root range does not
- // actually contain an entry, so its entry_ field is meaningless. For
- // this reason, the entry_ field should only be accessed on child
- // ContainedRangeMap objects, and never on |this|.
- u_int32_t entry_size_;
- const EntryType *entry_ptr_;
- // The map containing child ranges, keyed by each child range's high
- // address. This is a pointer to avoid allocating map structures for
- // leaf nodes, where they are not needed.
- AddressToRangeMap map_;
- };
- } // namespace google_breakpad
- #endif // PROCESSOR_STATIC_CONTAINED_RANGE_MAP_H__