/**
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* \file
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* Windows proclib support for Mono.
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*
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* Copyright 2016 Microsoft
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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#include <config.h>
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#include <glib.h>
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#ifdef HOST_WIN32
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#include <windows.h>
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#include "mono/utils/mono-proclib.h"
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int
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mono_process_current_pid ()
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{
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return (int) GetCurrentProcessId ();
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}
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/**
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* mono_cpu_count:
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* \returns the number of processors on the system.
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*/
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int
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mono_cpu_count (void)
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{
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SYSTEM_INFO info;
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GetSystemInfo (&info);
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return info.dwNumberOfProcessors;
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}
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/*
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* This function returns the cpu usage in percentage,
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* normalized on the number of cores.
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*
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* Warning : the percentage returned can be > 100%. This
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* might happens on systems like Android which, for
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* battery and performance reasons, shut down cores and
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* lie about the number of active cores.
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*/
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#if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
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gint32
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mono_cpu_usage (MonoCpuUsageState *prev)
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{
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gint32 cpu_usage = 0;
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gint64 cpu_total_time;
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gint64 cpu_busy_time;
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guint64 idle_time;
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guint64 kernel_time;
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guint64 user_time;
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if (!GetSystemTimes ((FILETIME*) &idle_time, (FILETIME*) &kernel_time, (FILETIME*) &user_time)) {
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g_error ("GetSystemTimes() failed, error code is %d\n", GetLastError ());
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return -1;
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}
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cpu_total_time = (gint64)((user_time - (prev ? prev->user_time : 0)) + (kernel_time - (prev ? prev->kernel_time : 0)));
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cpu_busy_time = (gint64)(cpu_total_time - (idle_time - (prev ? prev->idle_time : 0)));
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if (prev) {
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prev->idle_time = idle_time;
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prev->kernel_time = kernel_time;
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prev->user_time = user_time;
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}
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if (cpu_total_time > 0 && cpu_busy_time > 0)
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cpu_usage = (gint32)(cpu_busy_time * 100 / cpu_total_time);
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return cpu_usage;
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}
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#endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
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#endif /* HOST_WIN32*/
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