lib/include/vmware/tools/log.h

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/*********************************************************
 * Copyright (C) 2011-2016 VMware, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation version 2.1 and no later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the Lesser GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA.
 *
 *********************************************************/

#ifndef _VMTOOLS_LOG_H_
#define _VMTOOLS_LOG_H_

#if !defined(G_LOG_DOMAIN)
#  error "G_LOG_DOMAIN must be defined."
#endif

#include <glib.h>

#if defined(__GNUC__)
#  define FUNC __func__
#else
#  define FUNC __FUNCTION__
#endif

/*
 *******************************************************************************
 * g_info --                                                              */ 
#if !defined(g_info)
#  define g_info(fmt, ...) g_log(G_LOG_DOMAIN, G_LOG_LEVEL_INFO, fmt, ## __VA_ARGS__)
#endif

#ifdef VMX86_DEBUG
#define VMTOOLS_LOGGING_LEVEL_DEFAULT "info"
#else
#define VMTOOLS_LOGGING_LEVEL_DEFAULT "message"
#endif


/*
 * As of version 2.46, glib thinks the Windows compiler where
 * _MSC_VER >= 1400 can handle G_HAVE_ISO_VARARGS.  This makes our
 * magic macros wrapping their macros fail in the simplest case,
 * where only the fmt arg is present (eg vm_debug("test").
 * vm_debug("test %d", 123) works fine.
 *
 * Work around this by making g_debug() et all be inline functions,
 * which is how it works if G_HAVE_ISO_VARARGS isn't set.
 *
 * Though experimentation we found that this also works:
 *
 * #define LOGHELPER(...)  ,##_VA_ARGS__
 * #define LOG(fmt, ...) g_debug_macro(__FUNCTION__, ": " fmt, LOGHELPER(__VA_ARGS__))
 *
 * but since its disgusting and even more magical, the inline variant was chosen
 * instead.
 */

#if defined(_WIN32) && GLIB_CHECK_VERSION(2, 46, 0)
static inline void
g_critical_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, fmt, args);
   va_end(args);
}

/*
 *******************************************************************************
 * vm_{critical,debug,error,info,message,warning} --                      */ 
#define  vm_critical(fmt, ...)      g_critical_inline("%s: " fmt, FUNC, ## __VA_ARGS__)

static inline void
g_debug_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, fmt, args);
   va_end(args);
}

#define  vm_debug(fmt, ...)      g_debug_inline("%s: " fmt, FUNC, ## __VA_ARGS__)

static inline void
g_error_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_ERROR, fmt, args);
   va_end(args);
}

#define  vm_error(fmt, ...)      g_error_inline("%s: " fmt, FUNC, ## __VA_ARGS__)


static inline void
g_info_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_INFO, fmt, args);
   va_end(args);
}

#define  vm_info(fmt, ...)      g_info_inline("%s: " fmt, FUNC, ## __VA_ARGS__)

static inline void
g_message_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, fmt, args);
   va_end(args);
}

#define  vm_message(fmt, ...)      g_message_inline("%s: " fmt, FUNC, ## __VA_ARGS__)

static inline void
g_warning_inline(const gchar *fmt,
               ...)
{
   va_list args;
   va_start(args, fmt);
   g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_WARNING, fmt, args);
   va_end(args);
}

#define  vm_warning(fmt, ...)      g_warning_inline("%s: " fmt, FUNC, ## __VA_ARGS__)

#else // ! (windows & glib >= 2.46)

/*
 *******************************************************************************
 * vm_{critical,debug,error,info,message,warning} --                      */ 
#define  vm_critical(fmt, ...)   g_critical("%s: " fmt, FUNC, ## __VA_ARGS__)

#define  vm_debug(fmt, ...)      g_debug("%s: " fmt, FUNC, ## __VA_ARGS__)

#define  vm_error(fmt, ...)      g_error("%s: " fmt, FUNC, ## __VA_ARGS__)

#define  vm_info(fmt, ...)       g_info("%s: " fmt, FUNC, ## __VA_ARGS__)

#define  vm_message(fmt, ...)    g_message("%s: " fmt, FUNC, ## __VA_ARGS__)

#define  vm_warning(fmt, ...)    g_warning("%s: " fmt, FUNC, ## __VA_ARGS__)
#endif // ! (windows & glib >= 2.46)


G_BEGIN_DECLS

void
VMTools_ConfigLogToStdio(const gchar *domain);

void
VMTools_ConfigLogging(const gchar *defaultDomain,
                      GKeyFile *cfg,
                      gboolean force,
                      gboolean reset);

G_END_DECLS

#endif /* _VMTOOLS_LOG_H_ */