`clock_getcpuclockid.3p` ( 3 )

часы (РАСШИРЕННОЕ РЕАЛЬНОЕ ВРЕМЯ) (time clock (ADVANCED REALTIME))

Пролог (Prolog)

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

Имя (Name)

clock_getcpuclockid — access a process CPU-time clock (ADVANCED REALTIME)

Синопсис (Synopsis)

#include <time.h>

int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);

Описание (Description)

The clock_getcpuclockid() function shall return the clock ID of the CPU-time clock of the process specified by pid. If the process described by pid exists and the calling process has permission, the clock ID of this clock shall be returned in clock_id.

If pid is zero, the clock_getcpuclockid() function shall return the clock ID of the CPU-time clock of the process making the call, in clock_id.

The conditions under which one process has permission to obtain the CPU-time clock ID of other processes are implementation- defined.

Возвращаемое значение (Return value)

Upon successful completion, clock_getcpuclockid() shall return zero; otherwise, an error number shall be returned to indicate the error.

Ошибки (Error)

The clock_getcpuclockid() function shall fail if:

EPERM The requesting process does not have permission to access the CPU-time clock for the process.

The clock_getcpuclockid() function may fail if:

ESRCH No process can be found corresponding to the process specified by pid.

The following sections are informative.

Примеры (Examples)

None.

Использование в приложениях (Application usage)

The clock_getcpuclockid() function is part of the Process CPU- Time Clocks option and need not be provided on all implementations.

Обоснование (Rationale)

None.

Будущие направления (Future directions)