CLOCK_GETCPUCLOCKID(3)     POSIX Programmer's Manual    CLOCK_GETCPUCLOCKID(3)



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

NNAAMMEE
       clock_getcpuclockid -- access a process CPU-time clock (AADDVVAANNCCEEDD
       RREEAALLTTIIMMEE)

SSYYNNOOPPSSIISS
       #include <time.h>

       int clock_getcpuclockid(pid_t _p_i_d, clockid_t *_c_l_o_c_k___i_d);

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

       If _p_i_d is zero, the _c_l_o_c_k___g_e_t_c_p_u_c_l_o_c_k_i_d() function shall return the
       clock ID of the CPU-time clock of the process making the call, in
       _c_l_o_c_k___i_d.

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

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

EERRRROORRSS
       The _c_l_o_c_k___g_e_t_c_p_u_c_l_o_c_k_i_d() function shall fail if:

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

       The _c_l_o_c_k___g_e_t_c_p_u_c_l_o_c_k_i_d() function may fail if:

       EESSRRCCHH  No process can be found corresponding to the process specified
              by _p_i_d.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

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

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _c_l_o_c_k___g_e_t_r_e_s(), _t_i_m_e_r___c_r_e_a_t_e()

       The Base Definitions volume of POSIX.1-2017, <<ttiimmee..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  In the event of any discrepancy between this version and the
       original IEEE and The Open Group Standard, the original IEEE and The
       Open Group Standard is the referee document. The original Standard can
       be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017               CLOCK_GETCPUCLOCKID(3)
