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| //===-- QueueList.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_QueueList_h_
#define liblldb_QueueList_h_
#include <mutex>
#include <vector>
#include "lldb/Utility/Iterable.h"
#include "lldb/Utility/UserID.h"
#include "lldb/lldb-private.h"
namespace lldb_private {
// QueueList:
// This is the container for libdispatch aka Grand Central Dispatch Queue
// objects.
//
// Each Process will have a QueueList. When the process execution is paused,
// the QueueList may be populated with Queues by the SystemRuntime.
class QueueList {
friend class Process;
public:
QueueList(Process *process);
~QueueList();
/// Get the number of libdispatch queues that are available
///
/// \return
/// The number of queues that are stored in the QueueList.
uint32_t GetSize();
/// Get the Queue at a given index number
///
/// \param [in] idx
/// The index number (0-based) of the queue.
/// \return
/// The Queue at that index number.
lldb::QueueSP GetQueueAtIndex(uint32_t idx);
typedef std::vector<lldb::QueueSP> collection;
typedef LockingAdaptedIterable<collection, lldb::QueueSP, vector_adapter,
std::mutex>
QueueIterable;
/// Iterate over the list of queues
///
/// \return
/// An Iterable object which can be used to loop over the queues
/// that exist.
QueueIterable Queues() { return QueueIterable(m_queues, m_mutex); }
/// Clear out the list of queues from the QueueList
void Clear();
/// Add a Queue to the QueueList
///
/// \param [in] queue
/// Used by the SystemRuntime to populate the QueueList
void AddQueue(lldb::QueueSP queue);
/// Find a queue in the QueueList by QueueID
///
/// \param [in] qid
/// The QueueID (same as returned by Thread::GetQueueID()) to find.
///
/// \return
/// A QueueSP to the queue requested, if it is present in the QueueList.
/// An empty QueueSP will be returned if this queue was not found.
lldb::QueueSP FindQueueByID(lldb::queue_id_t qid);
/// Find a queue in the QueueList by IndexID
///
/// \param [in] index_id
/// Find a queue by IndexID. This is an integer associated with each
/// unique queue seen during a debug session and will not be reused
/// for a different queue. Unlike the QueueID, a 64-bit value, this
/// will tend to be an integral value like 1 or 7.
///
/// \return
/// A QueueSP to the queue requested, if it is present in the QueueList.
/// An empty QueueSP will be returned if this queue was not found.
lldb::QueueSP FindQueueByIndexID(uint32_t index_id);
std::mutex &GetMutex();
protected:
// Classes that inherit from Process can see and modify these
Process *m_process; ///< The process that manages this queue list.
uint32_t
m_stop_id; ///< The process stop ID that this queue list is valid for.
collection m_queues; ///< The queues for this process.
std::mutex m_mutex;
private:
QueueList() = delete;
};
} // namespace lldb_private
#endif // liblldb_QueueList_h_
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