/*
 * Copyright (C) 2014 Google Inc. All rights reserved.
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 * 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,
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#include "flutter/sky/engine/platform/TestingPlatformSupport.h"

namespace blink {

TestingDiscardableMemory::TestingDiscardableMemory(size_t size)
    : m_data(size), m_isLocked(true) {}

TestingDiscardableMemory::~TestingDiscardableMemory() {}

bool TestingDiscardableMemory::lock() {
  ASSERT(!m_isLocked);
  m_isLocked = true;
  return false;
}

void* TestingDiscardableMemory::data() {
  ASSERT(m_isLocked);
  return m_data.data();
}

void TestingDiscardableMemory::unlock() {
  ASSERT(m_isLocked);
  m_isLocked = false;
  // Force eviction to catch clients not correctly checking the return value of
  // lock().
  memset(m_data.data(), 0, m_data.size());
}

TestingPlatformSupport::TestingPlatformSupport(const Config& config)
    : m_config(config), m_oldPlatform(blink::Platform::current()) {
  blink::Platform::initialize(this);
}

TestingPlatformSupport::~TestingPlatformSupport() {
  blink::Platform::initialize(m_oldPlatform);
}

blink::WebDiscardableMemory*
TestingPlatformSupport::allocateAndLockDiscardableMemory(size_t bytes) {
  return !m_config.hasDiscardableMemorySupport
             ? 0
             : new TestingDiscardableMemory(bytes);
}

}  // namespace blink
