//===-- BreakpointLocationCollection.h --------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_BreakpointLocationCollection_h_
#define liblldb_BreakpointLocationCollection_h_

#include <mutex>
#include <vector>

#include "lldb/Utility/Iterable.h"
#include "lldb/lldb-private.h"

namespace lldb_private {

class BreakpointLocationCollection {
public:
  BreakpointLocationCollection();

  ~BreakpointLocationCollection();
  
  BreakpointLocationCollection &operator=(const BreakpointLocationCollection &rhs);

  /// Add the breakpoint \a bp_loc_sp to the list.
  ///
  /// \param[in] bp_sp
  ///     Shared pointer to the breakpoint location that will get added
  ///     to the list.
  ///
  /// \result
  ///     Returns breakpoint location id.
  void Add(const lldb::BreakpointLocationSP &bp_loc_sp);

  /// Removes the breakpoint location given by \b breakID from this
  /// list.
  ///
  /// \param[in] break_id
  ///     The breakpoint index to remove.
  ///
  /// \param[in] break_loc_id
  ///     The breakpoint location index in break_id to remove.
  ///
  /// \result
  ///     \b true if the breakpoint was in the list.
  bool Remove(lldb::break_id_t break_id, lldb::break_id_t break_loc_id);

  /// Returns a shared pointer to the breakpoint location with id \a
  /// breakID.
  ///
  /// \param[in] break_id
  ///     The breakpoint  ID to seek for.
  ///
  /// \param[in] break_loc_id
  ///     The breakpoint location ID in \a break_id to seek for.
  ///
  /// \result
  ///     A shared pointer to the breakpoint.  May contain a NULL
  ///     pointer if the breakpoint doesn't exist.
  lldb::BreakpointLocationSP FindByIDPair(lldb::break_id_t break_id,
                                          lldb::break_id_t break_loc_id);

  /// Returns a shared pointer to the breakpoint location with id \a
  /// breakID, const version.
  ///
  /// \param[in] breakID
  ///     The breakpoint location ID to seek for.
  ///
  /// \param[in] break_loc_id
  ///     The breakpoint location ID in \a break_id to seek for.
  ///
  /// \result
  ///     A shared pointer to the breakpoint.  May contain a NULL
  ///     pointer if the breakpoint doesn't exist.
  const lldb::BreakpointLocationSP
  FindByIDPair(lldb::break_id_t break_id, lldb::break_id_t break_loc_id) const;

  /// Returns a shared pointer to the breakpoint location with index
  /// \a i.
  ///
  /// \param[in] i
  ///     The breakpoint location index to seek for.
  ///
  /// \result
  ///     A shared pointer to the breakpoint.  May contain a NULL
  ///     pointer if the breakpoint doesn't exist.
  lldb::BreakpointLocationSP GetByIndex(size_t i);

  /// Returns a shared pointer to the breakpoint location with index
  /// \a i, const version.
  ///
  /// \param[in] i
  ///     The breakpoint location index to seek for.
  ///
  /// \result
  ///     A shared pointer to the breakpoint.  May contain a NULL
  ///     pointer if the breakpoint doesn't exist.
  const lldb::BreakpointLocationSP GetByIndex(size_t i) const;

  /// Returns the number of elements in this breakpoint location list.
  ///
  /// \result
  ///     The number of elements.
  size_t GetSize() const { return m_break_loc_collection.size(); }

  /// Enquires of all the breakpoint locations in this list whether
  /// we should stop at a hit at \a breakID.
  ///
  /// \param[in] context
  ///    This contains the information about this stop.
  ///
  /// \param[in] breakID
  ///    This break ID that we hit.
  ///
  /// \return
  ///    \b true if we should stop, \b false otherwise.
  bool ShouldStop(StoppointCallbackContext *context);

  /// Print a description of the breakpoint locations in this list
  /// to the stream \a s.
  ///
  /// \param[in] s
  ///     The stream to which to print the description.
  ///
  /// \param[in] level
  ///     The description level that indicates the detail level to
  ///     provide.
  ///
  /// \see lldb::DescriptionLevel
  void GetDescription(Stream *s, lldb::DescriptionLevel level);

  /// Check whether this collection of breakpoint locations have any
  /// thread specifiers, and if yes, is \a thread_id contained in any
  /// of these specifiers.
  ///
  /// \param[in] thread
  ///     The thread against which to test.
  ///
  /// return
  ///     \b true if the collection contains at least one location that
  ///     would be valid for this thread, false otherwise.
  bool ValidForThisThread(Thread *thread);

  /// Tell whether ALL the breakpoints in the location collection are internal.
  ///
  /// \result
  ///     \b true if all breakpoint locations are owned by internal breakpoints,
  ///     \b false otherwise.
  bool IsInternal() const;

protected:
  // Classes that inherit from BreakpointLocationCollection can see and modify
  // these

private:
  // For BreakpointLocationCollection only

  typedef std::vector<lldb::BreakpointLocationSP> collection;

  collection::iterator GetIDPairIterator(lldb::break_id_t break_id,
                                         lldb::break_id_t break_loc_id);

  collection::const_iterator
  GetIDPairConstIterator(lldb::break_id_t break_id,
                         lldb::break_id_t break_loc_id) const;

  collection m_break_loc_collection;
  mutable std::mutex m_collection_mutex;

public:
  typedef AdaptedIterable<collection, lldb::BreakpointLocationSP,
                          vector_adapter>
      BreakpointLocationCollectionIterable;
  BreakpointLocationCollectionIterable BreakpointLocations() {
    return BreakpointLocationCollectionIterable(m_break_loc_collection);
  }
};

} // namespace lldb_private

#endif // liblldb_BreakpointLocationCollection_h_