83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
#include <libproc.h>
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#include <time.h>
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#include <mach/mach_time.h>
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#include <sys/errno.h>
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#include <stdlib.h>
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#include "lfmacos.h"
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#define NS_TO_SECONDS 1000000000.0
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#define NEW_PROCESS_SENTINEL (-1.0)
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ProcessData *new_ProcessData() {
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ProcessData *pd = malloc(sizeof(ProcessData));
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pd->last_total_consumed = NEW_PROCESS_SENTINEL;
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return pd;
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}
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int update_process(pid_t pid, ProcessData *proc) {
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struct proc_taskinfo taskinfo;
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const int r = proc_pidinfo(pid, PROC_PIDTASKINFO, 0, &taskinfo, PROC_PIDTASKINFO_SIZE);
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if (r != PROC_PIDTASKINFO_SIZE) {
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return 1;
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}
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mach_timebase_info_data_t info;
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mach_timebase_info(&info);
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const double ns_per_tick = (double)info.numer / (double)info.denom;
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time(&(proc->timestamp));
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proc->total_kernel_time = (taskinfo.pti_total_system * ns_per_tick) / NS_TO_SECONDS;
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proc->total_user_time = (taskinfo.pti_total_user * ns_per_tick) / NS_TO_SECONDS;
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proc->virtual_memory = taskinfo.pti_virtual_size;
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proc->resident_memory = taskinfo.pti_resident_size;
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if (proc->last_total_consumed != NEW_PROCESS_SENTINEL) {
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time_t t = proc->timestamp - proc->last_timestamp;
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proc->percent_cpu = 100.0 * (proc->total_user_time + proc->total_kernel_time - proc->last_total_consumed) / t;
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} else {
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proc->percent_cpu = 0.0;
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}
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proc->last_timestamp = proc->timestamp;
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proc->last_total_consumed = proc->total_kernel_time + proc->total_user_time;
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return 0;
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}
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/* reallocarray is reimplemented here for macOS because Apple doesn't expose
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* their implementation. This is taken straight from the OpenBSD source as
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* shown in the below copyright notice
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*/
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/* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */
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/*
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* Copyright (c) 2008 Otto Moerbeek <otto@drijf.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* OPENBSD ORIGINAL: lib/libc/stdlib/reallocarray.c */
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#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4))
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void *reallocarray(void *optr, size_t nmemb, size_t size)
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{
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if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
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nmemb > 0 && SIZE_MAX / nmemb < size) {
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errno = ENOMEM;
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return NULL;
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}
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return realloc(optr, size * nmemb);
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}
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