validation.cc

Go to the documentation of this file.

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "impeller/base/validation.h"
 
#include <atomic>
 
#include "flutter/fml/logging.h"
 
namespace impeller {
 
static std::atomic_int32_t sValidationLogsDisabledCount = 0;
static std::atomic_int32_t sValidationLogsAreFatal = 0;
static ValidationFailureCallback sValidationFailureCallback;
 
void ImpellerValidationErrorsSetFatal(bool fatal) {
  sValidationLogsAreFatal = fatal;
}
 
void ImpellerValidationErrorsSetCallback(ValidationFailureCallback callback) {
  sValidationFailureCallback = std::move(callback);
}
 
ScopedValidationDisable::ScopedValidationDisable() {
  sValidationLogsDisabledCount++;
}
 
ScopedValidationDisable::~ScopedValidationDisable() {
  sValidationLogsDisabledCount--;
}
 
ScopedValidationFatal::ScopedValidationFatal() {
  sValidationLogsAreFatal++;
}
 
ScopedValidationFatal::~ScopedValidationFatal() {
  sValidationLogsAreFatal--;
}
 
ValidationLog::ValidationLog(const char* file, int line)
    : file_(file), line_(line) {}
 
ValidationLog::~ValidationLog() {
  if (sValidationLogsDisabledCount <= 0) {
    ImpellerValidationBreak(stream_.str().c_str(), file_, line_);
  }
}
 
std::ostream& ValidationLog::GetStream() {
  return stream_;
}
 
void ImpellerValidationBreak(const char* message, const char* file, int line) {
  if (sValidationFailureCallback &&
      sValidationFailureCallback(message, file, line)) {
    return;
  }
  const auto severity =
      ImpellerValidationErrorsAreFatal() ? fml::LOG_FATAL : fml::LOG_ERROR;
  auto fml_log = fml::LogMessage{severity, file, line, nullptr};
  fml_log.stream() <<
#if FLUTTER_RELEASE
      "Impeller validation: " << message;
#else   // FLUTTER_RELEASE
      "Break on '" << __FUNCTION__
                   << "' to inspect point of failure: " << message;
#endif  // FLUTTER_RELEASE
}
 
bool ImpellerValidationErrorsAreFatal() {
  return sValidationLogsAreFatal;
}
 
}  // namespace impeller