third_party/WebKit/Source/modules/webdatabase/QuotaTracker.cpp

/*
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#include "modules/webdatabase/QuotaTracker.h"

#include "platform/weborigin/SecurityOrigin.h"
#include "public/platform/Platform.h"
#include "public/platform/WebSecurityOrigin.h"
#include "wtf/StdLibExtras.h"
#include "wtf/Threading.h"

namespace blink {

QuotaTracker& QuotaTracker::instance() {
  DEFINE_THREAD_SAFE_STATIC_LOCAL(QuotaTracker, tracker, new QuotaTracker);
  return tracker;
}

void QuotaTracker::getDatabaseSizeAndSpaceAvailableToOrigin(
    SecurityOrigin* origin,
    const String& databaseName,
    unsigned long long* databaseSize,
    unsigned long long* spaceAvailable) {
  // Extra scope to unlock prior to potentially calling Platform.
  {
    MutexLocker lockData(m_dataGuard);
    ASSERT(m_databaseSizes.contains(origin->toRawString()));
    HashMap<String, SizeMap>::const_iterator it =
        m_databaseSizes.find(origin->toRawString());
    ASSERT(it->value.contains(databaseName));
    *databaseSize = it->value.get(databaseName);

    if (m_spaceAvailableToOrigins.contains(origin->toRawString())) {
      *spaceAvailable = m_spaceAvailableToOrigins.get(origin->toRawString());
      return;
    }
  }

  // The embedder hasn't pushed this value to us, so we pull it as needed.
  *spaceAvailable = Platform::current()->databaseGetSpaceAvailableForOrigin(
      WebSecurityOrigin(origin));
}

void QuotaTracker::updateDatabaseSize(SecurityOrigin* origin,
                                      const String& databaseName,
                                      unsigned long long databaseSize) {
  MutexLocker lockData(m_dataGuard);
  HashMap<String, SizeMap>::ValueType* it =
      m_databaseSizes.add(origin->toRawString(), SizeMap()).storedValue;
  it->value.set(databaseName, databaseSize);
}

void QuotaTracker::updateSpaceAvailableToOrigin(
    SecurityOrigin* origin,
    unsigned long long spaceAvailable) {
  MutexLocker lockData(m_dataGuard);
  m_spaceAvailableToOrigins.set(origin->toRawString(), spaceAvailable);
}

void QuotaTracker::resetSpaceAvailableToOrigin(SecurityOrigin* origin) {
  MutexLocker lockData(m_dataGuard);
  m_spaceAvailableToOrigins.remove(origin->toRawString());
}

}  // namespace blink