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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_CLIENT_LOGGING_H_
#define GPU_COMMAND_BUFFER_CLIENT_LOGGING_H_
#include "base/logging.h"
#include "gpu/command_buffer/client/gles2_impl_export.h"
// Macros to log information if --enable-gpu-client-logging is set and either:
// DCHECK_IS_ON(), or
// enable_gpu_client_logging=true is set in GN args.
// Code is optimized out if DCHECK is disabled or the other GN arg is not set.
// Requires that a LogSettings named log_settings_ is in scope whenever a macro
// is used.
//
// Note that it's typically necessary to also specify --enable-logging=stderr to
// see this logging output on Linux or macOS.
//
// Example usage:
//
// class Foo {
// public:
// Foo() {
// GPU_CLIENT_LOG("[" << LogPrefix() << "] Hello world");
// GPU_CLIENT_LOG_CODE_BLOCK({
// for (int i = 0; i < 10; ++i) {
// GPU_CLIENT_LOG_CODE_BLOCK("Hello again");
// }
// });
// }
//
// std::string LogPrefix() { return "Foo"; }
//
// private:
// LogSettings log_settings_;
// };
#if (DCHECK_IS_ON() || defined(GPU_ENABLE_CLIENT_LOGGING)) && \
!defined(__native_client__) && !defined(GLES2_CONFORMANCE_TESTS) && \
!defined(GLES2_INLINE_OPTIMIZATION)
#define GPU_CLIENT_DEBUG
#endif
#if defined(GPU_CLIENT_DEBUG)
#define GPU_CLIENT_LOG(args) LOG_IF(INFO, log_settings_.enabled()) << args;
#define GPU_CLIENT_LOG_CODE_BLOCK(code) code
#define GPU_CLIENT_DCHECK_CODE_BLOCK(code) code
#else // !defined(GPU_CLIENT_DEBUG)
#define GPU_CLIENT_LOG(args)
#define GPU_CLIENT_LOG_CODE_BLOCK(code)
#define GPU_CLIENT_DCHECK_CODE_BLOCK(code)
#endif // defined(GPU_CLIENT_DEBUG)
namespace gpu {
// Caches whether --enable-gpu-client-logging is set.
class GLES2_IMPL_EXPORT LogSettings {
public:
LogSettings();
LogSettings(const LogSettings&) = delete;
LogSettings& operator=(const LogSettings&) = delete;
~LogSettings();
bool enabled() { return enabled_; }
private:
bool enabled_;
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_CLIENT_LOGGING_H_
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