Added empty directory with myself as owner for new mixer.

webrtc/modules/audio_mixer/source/memory_pool_posix.h

+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_MEMORY_POOL_GENERIC_H_
+#define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_MEMORY_POOL_GENERIC_H_
+
+#include <assert.h>
+#include <list>
+
+#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+template <class MemoryType>
+class MemoryPoolImpl {
+ public:
+  // MemoryPool functions.
+  int32_t PopMemory(MemoryType*& memory);
+  int32_t PushMemory(MemoryType*& memory);
+
+  MemoryPoolImpl(int32_t initialPoolSize);
+  ~MemoryPoolImpl();
+
+  // Atomic functions
+  int32_t Terminate();
+  bool Initialize();
+
+ private:
+  // Non-atomic function.
+  int32_t CreateMemory(uint32_t amountToCreate);
+
+  CriticalSectionWrapper* _crit;
+
+  bool _terminate;
+
+  std::list<MemoryType*> _memoryPool;
+
+  uint32_t _initialPoolSize;
+  uint32_t _createdMemory;
+  uint32_t _outstandingMemory;
+};
+
+template <class MemoryType>
+MemoryPoolImpl<MemoryType>::MemoryPoolImpl(int32_t initialPoolSize)
+    : _crit(CriticalSectionWrapper::CreateCriticalSection()),
+      _terminate(false),
+      _initialPoolSize(initialPoolSize),
+      _createdMemory(0),
+      _outstandingMemory(0) {}
+
+template <class MemoryType>
+MemoryPoolImpl<MemoryType>::~MemoryPoolImpl() {
+  // Trigger assert if there is outstanding memory.
+  assert(_createdMemory == 0);
+  assert(_outstandingMemory == 0);
+  delete _crit;
+}
+
+template <class MemoryType>
+int32_t MemoryPoolImpl<MemoryType>::PopMemory(MemoryType*& memory) {
+  CriticalSectionScoped cs(_crit);
+  if (_terminate) {
+    memory = NULL;
+    return -1;
+  }
+  if (_memoryPool.empty()) {
+    // _memoryPool empty create new memory.
+    CreateMemory(_initialPoolSize);
+    if (_memoryPool.empty()) {
+      memory = NULL;
+      return -1;
+    }
+  }
+  memory = _memoryPool.front();
+  _memoryPool.pop_front();
+  _outstandingMemory++;
+  return 0;
+}
+
+template <class MemoryType>
+int32_t MemoryPoolImpl<MemoryType>::PushMemory(MemoryType*& memory) {
+  if (memory == NULL) {
+    return -1;
+  }
+  CriticalSectionScoped cs(_crit);
+  _outstandingMemory--;
+  if (_memoryPool.size() > (_initialPoolSize << 1)) {
+    // Reclaim memory if less than half of the pool is unused.
+    _createdMemory--;
+    delete memory;
+    memory = NULL;
+    return 0;
+  }
+  _memoryPool.push_back(memory);
+  memory = NULL;
+  return 0;
+}
+
+template <class MemoryType>
+bool MemoryPoolImpl<MemoryType>::Initialize() {
+  CriticalSectionScoped cs(_crit);
+  return CreateMemory(_initialPoolSize) == 0;
+}
+
+template <class MemoryType>
+int32_t MemoryPoolImpl<MemoryType>::Terminate() {
+  CriticalSectionScoped cs(_crit);
+  assert(_createdMemory == _outstandingMemory + _memoryPool.size());
+
+  _terminate = true;
+  // Reclaim all memory.
+  while (_createdMemory > 0) {
+    MemoryType* memory = _memoryPool.front();
+    _memoryPool.pop_front();
+    delete memory;
+    _createdMemory--;
+  }
+  return 0;
+}
+
+template <class MemoryType>
+int32_t MemoryPoolImpl<MemoryType>::CreateMemory(uint32_t amountToCreate) {
+  for (uint32_t i = 0; i < amountToCreate; i++) {
+    MemoryType* memory = new MemoryType();
+    if (memory == NULL) {
+      return -1;
+    }
+    _memoryPool.push_back(memory);
+    _createdMemory++;
+  }
+  return 0;
+}
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_MEMORY_POOL_GENERIC_H_