timing.c File Reference

#include "mbedtls/config.h"
#include "mbedtls/platform.h"
#include "mbedtls/timing.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <signal.h>
#include <time.h>

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Classes
struct	_hr_time

Macros
#define	asm   __asm
#define	HAVE_HARDCLOCK
#define	FAIL

Functions
unsigned long	mbedtls_timing_hardclock (void)
	Return the CPU cycle counter value. More...
unsigned long	mbedtls_timing_get_timer (struct mbedtls_timing_hr_time *val, int reset)
	Return the elapsed time in milliseconds. More...
static void	sighandler (int signum)
void	mbedtls_set_alarm (int seconds)
	Setup an alarm clock. More...
void	mbedtls_timing_set_delay (void *data, uint32_t int_ms, uint32_t fin_ms)
	Set a pair of delays to watch (See mbedtls_timing_get_delay().) More...
int	mbedtls_timing_get_delay (void *data)
	Get the status of delays (Memory helper: number of delays passed.) More...
static void	busy_msleep (unsigned long msec)
int	mbedtls_timing_self_test (int verbose)
	Checkup routine. More...

Variables
static int	hardclock_init = 0
static struct timeval	tv_init
volatile int	mbedtls_timing_alarmed = 0

Macro Definition Documentation

asm

#define asm   __asm

FAIL

#define FAIL

Value:

do                      \
{                                       \
    if( verbose != 0 )                  \
        mbedtls_printf( "failed\n" );   \
                                        \
    return( 1 );                        \
} while( 0 )

HAVE_HARDCLOCK

#define HAVE_HARDCLOCK

Function Documentation

busy_msleep()

static void busy_msleep ( unsigned long  msec )

static

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mbedtls_set_alarm()

void mbedtls_set_alarm

(

int

seconds

)

Setup an alarm clock.

Parameters

seconds

delay before the "mbedtls_timing_alarmed" flag is set

Warning

Only one alarm at a time is supported. In a threaded context, this means one for the whole process, not one per thread.

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mbedtls_timing_get_delay()

int mbedtls_timing_get_delay

(

void *

data

)

Get the status of delays (Memory helper: number of delays passed.)

Parameters

data	Pointer to timing data Must point to a valid mbedtls_timing_delay_context struct.

Returns

-1 if cancelled (fin_ms = 0) 0 if none of the delays are passed, 1 if only the intermediate delay is passed, 2 if the final delay is passed.

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mbedtls_timing_get_timer()

unsigned long mbedtls_timing_get_timer	(	struct mbedtls_timing_hr_time *	val,
		int	reset
	)

Return the elapsed time in milliseconds.

Parameters

val	points to a timer structure
reset	if set to 1, the timer is restarted

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mbedtls_timing_hardclock()

unsigned long mbedtls_timing_hardclock

(

void

)

Return the CPU cycle counter value.

Warning

This is only a best effort! Do not rely on this! In particular, it is known to be unreliable on virtual machines.

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mbedtls_timing_self_test()

int mbedtls_timing_self_test

(

int

verbose

)

Checkup routine.

Returns

0 if successful, or 1 if a test failed

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mbedtls_timing_set_delay()

void mbedtls_timing_set_delay	(	void *	data,
		uint32_t	int_ms,
		uint32_t	fin_ms
	)

Set a pair of delays to watch (See mbedtls_timing_get_delay().)

Parameters

data	Pointer to timing data Must point to a valid mbedtls_timing_delay_context struct.
int_ms	First (intermediate) delay in milliseconds.
fin_ms	Second (final) delay in milliseconds. Pass 0 to cancel the current delay.

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sighandler()

static void sighandler ( int  signum )

static

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Variable Documentation

hardclock_init

int hardclock_init = 0

static

mbedtls_timing_alarmed

volatile int mbedtls_timing_alarmed = 0

tv_init

struct timeval tv_init

static