// This file is automatically generated from src/glog/vlog_is_on.h.in

// using src/windows/preprocess.sh.

// DO NOT EDIT!

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// Author: Ray Sidney and many others

//

// Defines the VLOG_IS_ON macro that controls the variable-verbosity

// conditional logging.

//

// It's used by VLOG and VLOG_IF in logging.h

// and by RAW_VLOG in raw_logging.h to trigger the logging.

//

// It can also be used directly e.g. like this:

//   if (VLOG_IS_ON(2)) {

//     // do some logging preparation and logging

//     // that can't be accomplished e.g. via just VLOG(2) << ...;

//   }

//

// The truth value that VLOG_IS_ON(level) returns is determined by 

// the three verbosity level flags:

//   --v=<n>  Gives the default maximal active V-logging level;

//            0 is the default.

//            Normally positive values are used for V-logging levels.

//   --vmodule=<str>  Gives the per-module maximal V-logging levels to override

//                    the value given by --v.

//                    E.g. "my_module=2,foo*=3" would change the logging level

//                    for all code in source files "my_module.*" and "foo*.*"

//                    ("-inl" suffixes are also disregarded for this matching).

//

// SetVLOGLevel helper function is provided to do limited dynamic control over

// V-logging by overriding the per-module settings given via --vmodule flag.

//

// CAVEAT: --vmodule functionality is not available in non gcc compilers.

//

#ifndef BASE_VLOG_IS_ON_H_

#define BASE_VLOG_IS_ON_H_

#include "glog/log_severity.h"

// Annoying stuff for windows -- makes sure clients can import these functions

#ifndef GOOGLE_GLOG_DLL_DECL

# if defined(_WIN32) && !defined(__CYGWIN__)

#   define GOOGLE_GLOG_DLL_DECL  __declspec(dllimport)

# else

#   define GOOGLE_GLOG_DLL_DECL

# endif

#endif

#if defined(__GNUC__)

// We emit an anonymous static int* variable at every VLOG_IS_ON(n) site.

// (Normally) the first time every VLOG_IS_ON(n) site is hit,

// we determine what variable will dynamically control logging at this site:

// it's either FLAGS_v or an appropriate internal variable

// matching the current source file that represents results of

// parsing of --vmodule flag and/or SetVLOGLevel calls.

#define VLOG_IS_ON(verboselevel)                                \

  __extension__  \

  ({ static google::int32* vlocal__ = &google::kLogSiteUninitialized;           \

     google::int32 verbose_level__ = (verboselevel);                    \

     (*vlocal__ >= verbose_level__) &&                          \

     ((vlocal__ != &google::kLogSiteUninitialized) ||                   \

      (google::InitVLOG3__(&vlocal__, &FLAGS_v,                         \

                   __FILE__, verbose_level__))); })

#else

// GNU extensions not available, so we do not support --vmodule.

// Dynamic value of FLAGS_v always controls the logging level.

#define VLOG_IS_ON(verboselevel) (FLAGS_v >= (verboselevel))

#endif

// Set VLOG(_IS_ON) level for module_pattern to log_level.

// This lets us dynamically control what is normally set by the --vmodule flag.

// Returns the level that previously applied to module_pattern.

// NOTE: To change the log level for VLOG(_IS_ON) sites

//	 that have already executed after/during InitGoogleLogging,

//	 one needs to supply the exact --vmodule pattern that applied to them.

//       (If no --vmodule pattern applied to them

//       the value of FLAGS_v will continue to control them.)

extern GOOGLE_GLOG_DLL_DECL int SetVLOGLevel(const char* module_pattern,

                                             int log_level);

// Various declarations needed for VLOG_IS_ON above: =========================

// Special value used to indicate that a VLOG_IS_ON site has not been

// initialized.  We make this a large value, so the common-case check

// of "*vlocal__ >= verbose_level__" in VLOG_IS_ON definition

// passes in such cases and InitVLOG3__ is then triggered.

extern google::int32 kLogSiteUninitialized;

// Helper routine which determines the logging info for a particalur VLOG site.

//   site_flag     is the address of the site-local pointer to the controlling

//                 verbosity level

//   site_default  is the default to use for *site_flag

//   fname         is the current source file name

//   verbose_level is the argument to VLOG_IS_ON

// We will return the return value for VLOG_IS_ON

// and if possible set *site_flag appropriately.

extern GOOGLE_GLOG_DLL_DECL bool InitVLOG3__(

    google::int32** site_flag,

    google::int32* site_default,

    const char* fname,

    google::int32 verbose_level);

#endif  // BASE_VLOG_IS_ON_H_