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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/process/process_metrics.h"
#include <stddef.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <unistd.h>
#include "base/memory/ptr_util.h"
namespace base {
ProcessMetrics::ProcessMetrics(ProcessHandle process)
: process_(process), last_cpu_(0) {}
// static
std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
ProcessHandle process) {
return WrapUnique(new ProcessMetrics(process));
}
base::expected<double, ProcessCPUUsageError>
ProcessMetrics::GetPlatformIndependentCPUUsage() {
struct kinfo_proc info;
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, process_};
size_t length = sizeof(info);
if (sysctl(mib, std::size(mib), &info, &length, NULL, 0) < 0) {
return base::unexpected(ProcessCPUUsageError::kSystemError);
}
return base::ok(double{info.ki_pctcpu} / FSCALE * 100.0);
}
base::expected<TimeDelta, ProcessCPUUsageError>
ProcessMetrics::GetCumulativeCPUUsage() {
NOTREACHED();
}
size_t GetSystemCommitCharge() {
int mib[2], pagesize;
unsigned long mem_total, mem_free, mem_inactive;
size_t length = sizeof(mem_total);
if (sysctl(mib, std::size(mib), &mem_total, &length, NULL, 0) < 0) {
return 0;
}
length = sizeof(mem_free);
if (sysctlbyname("vm.stats.vm.v_free_count", &mem_free, &length, NULL, 0) <
0) {
return 0;
}
length = sizeof(mem_inactive);
if (sysctlbyname("vm.stats.vm.v_inactive_count", &mem_inactive, &length, NULL,
0) < 0) {
return 0;
}
pagesize = getpagesize();
return mem_total - (mem_free * pagesize) - (mem_inactive * pagesize);
}
} // namespace base
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