ReactOS  0.4.15-dev-4922-ge8ccc85
timing.h File Reference

Portable interface to timeouts and to the CPU cycle counter. More...

#include "config.h"
#include <stdint.h>
Include dependency graph for timing.h:

Go to the source code of this file.

Classes

struct  mbedtls_timing_hr_time
 timer structure More...
 
struct  mbedtls_timing_delay_context
 Context for mbedtls_timing_set/get_delay() More...
 

Typedefs

typedef struct mbedtls_timing_delay_context mbedtls_timing_delay_context
 Context for mbedtls_timing_set/get_delay() More...
 

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...
 
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...
 

Variables

volatile int mbedtls_timing_alarmed
 

Detailed Description

Portable interface to timeouts and to the CPU cycle counter.

Definition in file timing.h.

Typedef Documentation

◆ mbedtls_timing_delay_context

Context for mbedtls_timing_set/get_delay()

Function Documentation

◆ mbedtls_set_alarm()

void mbedtls_set_alarm ( int  seconds)

Setup an alarm clock.

Parameters
secondsdelay 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.

◆ mbedtls_timing_get_delay()

int mbedtls_timing_get_delay ( void data)

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

Parameters
dataPointer 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.

◆ 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
valpoints to a timer structure
resetIf 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.

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

◆ 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
dataPointer to timing data. Must point to a valid mbedtls_timing_delay_context struct.
int_msFirst (intermediate) delay in milliseconds. The effect if int_ms > fin_ms is unspecified.
fin_msSecond (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.

Variable Documentation

◆ mbedtls_timing_alarmed

volatile int mbedtls_timing_alarmed