debug.h File Reference

Debugging routines for Flowgrind controller and daemon. More...

#include "config.h"
#include <limits.h>
#include <pthread.h>

Go to the source code of this file.

Macros
#define	DEBUG_MSG(LVL, MSG, ...)
	Print debug message to standard error. More...

Functions
int	debug_timestamp (char **resultp)
	Helper function for DEBUG_MSG macro. More...
void	decrease_debuglevel (void)
	Decrease debug level. More...
void	increase_debuglevel (void)
	Decrease debug level. More...

Variables
unsigned	debug_level
	Global debug level for flowgrind controller and daemon. More...

Detailed Description

Debugging routines for Flowgrind controller and daemon.

Definition in file debug.h.

Macro Definition Documentation

DEBUG_MSG

#define DEBUG_MSG	(		LVL,
			MSG,
			...
	)

Value:

        do {                                         \
        char *timestamp = NULL;                                              \
        debug_timestamp(&timestamp);                                         \
        if (debug_level >= LVL)                                              \
                fprintf(stderr, "%s %s:%d  [%d/%d] " MSG "\n",               \
                        timestamp, __FUNCTION__, __LINE__, getpid(),         \
                        (unsigned)pthread_self()%USHRT_MAX, ##__VA_ARGS__);  \
                free(timestamp);                                             \
} while (0)

Print debug message to standard error.

If the debug level is higher than the given debug level LVL, print debug message MSG together with current time, the delta in time since the last and first debug call, the function in which the debug call occurs, and the process and thread PID.

Definition at line 49 of file debug.h.

Function Documentation

debug_timestamp()

int debug_timestamp

(

char **

resultp

)

Helper function for DEBUG_MSG macro.

Write string with the current time in seconds and nanoseconds since the Epoch together with the delta in time since the last and first call the function.

Parameters

[in,out]

resultp

destination string to write to

Returns

return 0 for success, or -1 for failure

Definition at line 56 of file debug.c.

{
        struct timespec now = {.tv_sec = 0, .tv_nsec = 0};
        static struct timespec first = {.tv_sec = 0, .tv_nsec = 0};
        static struct timespec last = {.tv_sec = 0, .tv_nsec = 0};
 
        gettime(&now);
 
        /* Save time of first call */
        if (!first.tv_sec && !first.tv_nsec)
                first = last = now;
 
        char timestamp[30] = "";
        ctimespec_r(&now, timestamp, sizeof(timestamp), true);
 
        if (asprintf(strp, "%s [+%8.6lf] (%8.6lf)", timestamp,
                     time_diff(&last, &now), time_diff(&first, &now)) == -1)
                return -1;
 
        last = now;
        return 0;
}

decrease_debuglevel()

void decrease_debuglevel ( void  )

inline

Decrease debug level.

Definition at line 44 of file debug.c.

{
        debug_level--;
        printf("DEBUG_LEVEL=%u", debug_level);
}

increase_debuglevel()

void increase_debuglevel ( void  )

inline

Decrease debug level.

Definition at line 50 of file debug.c.

{
        debug_level++;
        printf("DEBUG_LEVEL=%u\n", debug_level);
}

Variable Documentation

debug_level

unsigned debug_level

Global debug level for flowgrind controller and daemon.

Definition at line 60 of file debug.h.