Tizen Native API
Functions
dlog
System

The Dlog API provides functions for sending log output.

Required Header

#include <dlog.h>

Overview

Sending log message to circular buffer. dlog APIs include Priority and Tag. By using priority and Tag, we can easily filtered messages what we want to see.

priority

priority level indicates the urgency of log message

Priority Description
DLOG_DEBUG Debug messasge. - Log message which developer want to check.
DLOG_INFO Information message - Normal operational messages. above of this priority will always be logged.
DLOG_WARN Warning messages - Not an error, but indication that an error will occur if action is not taken.
DLOG_ERROR Error message - Indicate error.

Functions

int dlog_print (log_priority prio, const char *tag, const char *fmt,...)
 Send log with priority and tag.
int dlog_vprint (log_priority prio, const char *tag, const char *fmt, va_list ap)
 Send log with priority, tag and va_list.

Enumeration Type Documentation

enum dlog_error_e

Enumeration for Dlog Error.

Since :
2.3.1
Enumerator:
DLOG_ERROR_NONE 

Successful

DLOG_ERROR_INVALID_PARAMETER 

Invalid parameter

DLOG_ERROR_NOT_PERMITTED 

Operation not permitted

enum log_priority

log priority values, in ascending priority order.

Since :
2.3.1
Enumerator:
DLOG_UNKNOWN 

Keep this always at the start

DLOG_DEFAULT 

Default

DLOG_VERBOSE 

Verbose

DLOG_DEBUG 

Debug

DLOG_INFO 

Info

DLOG_WARN 

Warning

DLOG_ERROR 

Error

DLOG_FATAL 

Fatal

DLOG_SILENT 

Silent

DLOG_PRIO_MAX 

Keep this always at the end.

Function Documentation

int dlog_print ( log_priority  prio,
const char *  tag,
const char *  fmt,
  ... 
)

Send log with priority and tag.

for application

Since :
2.3.1
Parameters:
[in]priolog_priority
[in]tagtag
[in]fmtformat string
Returns:
On success, the function returns the number of bytes written. On error, a negative errno-style error code
Return values:
DLOG_ERROR_INVALID_PARAMETERInvalid parameter
DLOG_ERROR_NOT_PERMITTEDOperation not permitted
Precondition:
none
Postcondition:
none
See also:
dlog_vprint 
#include<dlog.h>
int main(void)
{
    int integer = 21;
    char string[] = "test dlog";

    dlog_print(DLOG_INFO, "USR_TAG", "test dlog");
    dlog_print(DLOG_INFO, "USR_TAG", "%s, %d", string, integer);
    return 0;
}
int dlog_vprint ( log_priority  prio,
const char *  tag,
const char *  fmt,
va_list  ap 
)

Send log with priority, tag and va_list.

for application

Since :
2.3.1
Parameters:
[in]priolog_priority
[in]tagtag
[in]fmtformat string
[in]apva_list
Returns:
On success, the function returns the number of bytes written. On error, a negative errno-style error code
Return values:
DLOG_ERROR_INVALID_PARAMETERInvalid parameter
DLOG_ERROR_NOT_PERMITTEDOperation not permitted
Precondition:
none
Postcondition:
none
See also:
dlog_print 
#include<dlog.h>
void my_debug_print(char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    dlog_vprint(DLOG_INFO, "USR_TAG", format, ap);
    va_end(ap);
}

int main(void)
{
    my_debug_print("%s", "test dlog");
    my_debug_print("%s, %d", "test dlog", 21);
    return 0;
}