/*
 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved.
 *
 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot
 * Virtual Machine, which is developed at Christian Doppler Laboratory on
 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please
 * contact us at <http://mevss.jku.at/> if you need additional information
 * or have any questions.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef SHARE_VM_EVTRACE_TRACEBUFFER_INLINE_HPP
#define SHARE_VM_EVTRACE_TRACEBUFFER_INLINE_HPP

#include "runtime/thread.hpp"

inline TraceBuffer::TraceBuffer(size_t capacity)
  : end(data + capacity),
    queue_next(NULL)
{
  reset();
}

inline void TraceBuffer::reset() {
  top = data;
  owner = NULL;
  owner_id = 0;
  DEBUG_ONLY(for (uint8_t *p = data; p != end; p++) *p = 0;)
}

inline bool TraceBuffer::reserve(size_t nbytes) {
  assert(top >= data, "top before data area");
  assert(top <= end, "top after data area");
  assert(owner != NULL, "has no owner");
  assert(Thread::current() == owner, "current thread is not the owner");

  u1 *new_top = top + nbytes;
  if (new_top > end) {
    return false;
  }
  top = new_top;
  return true;
}

inline void* TraceBuffer::operator new(size_t size, size_t capacity) throw () {
  return CHeapObj<mtEventTracing>::operator new(size + capacity, CALLER_PC);
}

inline size_t TraceBuffer::filled_size() const {
  return (size_t) (top - data);
}

#endif /* SHARE_VM_EVTRACE_TRACEBUFFER_INLINE_HPP */