Espacios de nombres
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clock

De cppreference.com
< c‎ | chrono

 
 
Fecha y hora de los servicios públicos
Funciones
Original:
Functions
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Tiempo de manipulación
Original:
Time manipulation
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difftime
time
clock
Conversiones de formato
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Format conversions
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asctime
ctime
strftime
wcsftime
gmtime
localtime
mktime
Constantes
Original:
Constants
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CLOCKS_PER_SEC
Tipos
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Types
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tm
time_t
clock_t
 
Defined in header <time.h>
clock_t clock();
Devuelve el tiempo aproximado que se utiliza el procesador por el proceso desde el comienzo de una era definida por la aplicación relacionada con la ejecución del programa. Para convertir el valor en segundos resultado lo dividimos por CLOCKS_PER_SEC. Debido a que el principio de la era clock no tiene por qué coincidir con el inicio del programa, sólo la diferencia entre dos valores devueltos por las llamadas a diferentes clock es significativa. Si la CPU es compartida por otros procedimientos, tiempo clock puede avanzar más lento que el reloj de pared. Si el proceso actual es multiproceso y más de un núcleo de ejecución está disponible, el tiempo clock puede avanzar más rápido que el reloj de la pared .
Original:
Returns the approximate processor time used by the process since the beginning of an implementation-defined era related to the program's execution. To convert result value to seconds divide it by CLOCKS_PER_SEC. Because the beginning of the clock era does not have to coincide with the start of the program, only the difference between two values returned by different calls to clock is meaningful. If the CPU is shared by other processes, clock time may advance slower than wall clock. If the current process is multithreaded and more than one execution core is available, clock time may advance faster than wall clock.
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Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

Tiempo de procesador utilizado por el programa hasta la fecha o (clock_t)(-1) si esa información no está disponible .
Original:
Processor time used by the program so far or (clock_t)(-1) if that information is unavailable.
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[editar] Notas

En sistemas compatibles con POSIX, clock_gettime con id reloj CLOCK_PROCESS_CPUTIME_ID ofrece una mejor resolución .
Original:
On POSIX-compatible systems, clock_gettime with clock id CLOCK_PROCESS_CPUTIME_ID offers better resolution.
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El valor devuelto por clock() puede envolver en algunas implementaciones. Por ejemplo, en una máquina con 32-bit clock_t, se envuelve después de 2147 segundos o minutos 36 .
Original:
The value returned by clock() may wrap around on some implementations. For example, on a machine with 32-bit clock_t, it wraps after 2147 seconds or 36 minutes.
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clock() no está obligado a ser thread-safe .
Original:
clock() is not required to be thread-safe.
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[editar] Ejemplo

[editar] Ver también

convierte un objeto tm a una representación textual
Original:
converts a tm object to a textual representation
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(función) [edit]
devuelve la hora actual del sistema como el tiempo desde época
Original:
returns the current time of the system as time since epoch
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(función) [edit]