UT_UniversalLogSubprocessSource.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        UT_UniversalLogStdStreamSource.h ( FS Library, C++)
 *
 * COMMENTS:
 *
 */

#ifndef __UT_UniversalLogSubprocessSource__
#define __UT_UniversalLogSubprocessSource__

#include "UT_API.h"
#include "UT_NonCopyable.h"
#include "UT_UniversalLogSource.h"
#include "UT_UniversalLogStreamHelper.h"
#include <cstdio>

/// A class that holds information about a subprocess that directs its output
/// into the universal logging system through the subprocess source.
class UT_API UT_UniversalLogSubprocess
{
public:
                     UT_UniversalLogSubprocess(
                            const UT_StringRef &cmd,
                            FILE *original_stdout);
                    ~UT_UniversalLogSubprocess();

                     UT_NON_COPYABLE(UT_UniversalLogSubprocess)

    FILE            *getStdout() const
                     { return myStdout; }

private:
    friend class UT_UniversalLogSubprocessSource;

    FILE                        *myStdout;
    UT_UniversalLogStreamHelper  myHelper;
};

/// A log source for collecting data printed to stdout or stderr from another
/// process launched by Houdini.
class UT_API UT_UniversalLogSubprocessSource : public UT_UniversalLogSource
{
public:
                     UT_UniversalLogSubprocessSource();
                    ~UT_UniversalLogSubprocessSource() override;

                     UT_NON_COPYABLE(UT_UniversalLogSubprocessSource)

    static const UT_StringHolder     &staticName();

    static UT_UniversalLogSubprocess *createSubprocess(
                            const UT_StringHolder &cmd,
                            FILE *subproc_stdout);
    static void      startLogging(
                            UT_UniversalLogSubprocess &subprocess,
                            int pid,
                            const UT_StringHolder &identifier);
};

#endif