/*********************************************************************************************************
* Software License Agreement (BSD License)                                                               *
* Author: Sebastien Decugis <sdecugis@nict.go.jp>							 *
*													 *
* Copyright (c) 2011, WIDE Project and NICT								 *
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#include "fdproto-internal.h"

#include <stdarg.h>

pthread_mutex_t fd_log_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_key_t	fd_log_thname;
int fd_g_debug_lvl = 0;

/* These may be used to pass specific debug requests via the command-line parameters */
char * fd_debug_one_function = NULL;
char * fd_debug_one_file = NULL;

/* Useless function, only to ease setting up a breakpoint in gdb (break fd_breakhere) -- use TRACE_HERE */
int fd_breaks = 0;
int fd_breakhere(void) { return ++fd_breaks; }

static void fd_cleanup_mutex_silent( void * mutex )
{
	(void)pthread_mutex_unlock((pthread_mutex_t *)mutex);
}


/* Log a debug message */
void fd_log_debug ( const char * format, ... )
{
	va_list ap;
	
	(void)pthread_mutex_lock(&fd_log_lock);
	
	pthread_cleanup_push(fd_cleanup_mutex_silent, &fd_log_lock);
	
	va_start(ap, format);
	vfprintf( stdout, format, ap);
	va_end(ap);
	fflush(stdout);

	pthread_cleanup_pop(0);
	
	(void)pthread_mutex_unlock(&fd_log_lock);
}

/* Function to set the thread's friendly name */
void fd_log_threadname ( char * name )
{
	void * val = NULL;
	
	TRACE_ENTRY("%p(%s)", name, name?:"/");
	
	/* First, check if a value is already assigned to the current thread */
	val = pthread_getspecific(fd_log_thname);
	if (val != NULL) {
		TRACE_DEBUG(FULL, "Freeing old thread name: %s", val);
		free(val);
	}
	
	/* Now create the new string */
	if (name == NULL) {
		CHECK_POSIX_DO( pthread_setspecific(fd_log_thname, NULL), /* continue */);
		return;
	}
	
	CHECK_MALLOC_DO( val = strdup(name), return );
	
	CHECK_POSIX_DO( pthread_setspecific(fd_log_thname, val), /* continue */);
	return;
}

/* Write time into a buffer */
char * fd_log_time ( struct timespec * ts, char * buf, size_t len )
{
	int ret;
	size_t offset = 0;
	struct timespec tp;
	struct tm tm;
	
	/* Get current time */
	if (!ts) {
		ret = clock_gettime(CLOCK_REALTIME, &tp);
		if (ret != 0) {
			snprintf(buf, len, "%s", strerror(ret));
			return buf;
		}
		ts = &tp;
	}
	
	offset += strftime(buf + offset, len - offset, "%D,%T", localtime_r( &ts->tv_sec , &tm ));
	offset += snprintf(buf + offset, len - offset, ".%6.6ld", ts->tv_nsec / 1000);

	return buf;
}