timing.h File Reference

Context for mbedtls_timing_set/get_delay()

Setup an alarm clock.

Parameters:

seconds

delay before the "mbedtls_timing_alarmed" flag is set (must be >=0)

Warning:

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

Definition at line 322 of file timing.c.

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.

Definition at line 354 of file timing.c.

Return the elapsed time in milliseconds.

Parameters:

val	points to a timer structure
reset	If 0, query the elapsed time. Otherwise (re)start the timer.

Returns:

Elapsed time since the previous reset in ms. When restarting, this is always 0.

Note:

To initialize a timer, call this function with reset=1.

Determining the elapsed time and resetting the timer is not atomic on all platforms, so after the sequence `{ get_timer(1); ...; time1 = get_timer(1); ...; time2 = get_timer(0) }` the value time1+time2 is only approximately the delay since the first reset.

Definition at line 296 of file timing.c.

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.

Note:

This value starts at an unspecified origin and may wrap around.

Definition at line 98 of file timing.c.

Checkup routine.

Returns:

0 if successful, or 1 if a test failed

Definition at line 418 of file timing.c.

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. The effect if int_ms > fin_ms is unspecified.
fin_ms	Second (final) delay in milliseconds. Pass 0 to cancel the current delay.

Note:

To set a single delay, either use mbedtls_timing_set_timer directly or use this function with int_ms == fin_ms.

Definition at line 340 of file timing.c.