chromium/third_party/icu/source/common/restrace.h

// © 2019 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#ifndef __RESTRACE_H__
#define __RESTRACE_H__

#include "unicode/utypes.h"

#if U_ENABLE_TRACING

struct UResourceBundle;

U_NAMESPACE_BEGIN

class CharString;

/**
 * Instances of this class store information used to trace reads from resource
 * bundles when ICU is built with --enable-tracing.
 *
 * All arguments of type const UResourceBundle*, const char*, and
 * const ResourceTracer& are stored as pointers. The caller must retain
 * ownership for the lifetime of this ResourceTracer.
 *
 * Exported as U_COMMON_API for Windows because it is a value field
 * in other exported types.
 */
class U_COMMON_API ResourceTracer { … };

/**
 * This class provides methods to trace data file reads when ICU is built
 * with --enable-tracing.
 */
class FileTracer { … };

U_NAMESPACE_END

#else // U_ENABLE_TRACING

U_NAMESPACE_BEGIN

/**
 * Default trivial implementation when --enable-tracing is not used.
 */
class U_COMMON_API ResourceTracer {
public:
    ResourceTracer() {}

    ResourceTracer(const void*) {}

    ResourceTracer(const void*, const char*) {}

    ResourceTracer(const void*, int32_t) {}

    ResourceTracer(const ResourceTracer&, const char*) {}

    ResourceTracer(const ResourceTracer&, int32_t) {}

    void trace(const char*) const {}

    void traceOpen() const {}

    void maybeTrace(const char*) const {}
};

/**
 * Default trivial implementation when --enable-tracing is not used.
 */
class FileTracer {
public:
    static void traceOpen(const char*, const char*, const char*) {}
};

U_NAMESPACE_END

#endif // U_ENABLE_TRACING

#endif //__RESTRACE_H__