101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/process/process_metrics.h"
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#include <limits.h>
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#include <mach/task.h>
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#include <stddef.h>
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#include "base/logging.h"
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#include "base/mac/scoped_mach_port.h"
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#include "base/memory/ptr_util.h"
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#include "base/numerics/safe_conversions.h"
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namespace base {
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ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
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ProcessMetrics::~ProcessMetrics() {}
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// static
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std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
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ProcessHandle process) {
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return WrapUnique(new ProcessMetrics(process));
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}
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TimeDelta ProcessMetrics::GetCumulativeCPUUsage() {
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NOTIMPLEMENTED();
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return TimeDelta();
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}
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size_t GetMaxFds() {
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static const rlim_t kSystemDefaultMaxFds = 256;
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rlim_t max_fds;
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struct rlimit nofile;
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if (getrlimit(RLIMIT_NOFILE, &nofile)) {
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// Error case: Take a best guess.
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max_fds = kSystemDefaultMaxFds;
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} else {
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max_fds = nofile.rlim_cur;
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}
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if (max_fds > INT_MAX)
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max_fds = INT_MAX;
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return static_cast<size_t>(max_fds);
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}
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void IncreaseFdLimitTo(unsigned int max_descriptors) {
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// Unimplemented.
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}
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size_t GetPageSize() {
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return getpagesize();
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}
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// Bytes committed by the system.
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size_t GetSystemCommitCharge() {
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NOTIMPLEMENTED();
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return 0;
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}
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bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo) {
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struct host_basic_info hostinfo;
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mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
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base::mac::ScopedMachSendRight host(mach_host_self());
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int result = host_info(host.get(), HOST_BASIC_INFO,
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reinterpret_cast<host_info_t>(&hostinfo), &count);
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if (result != KERN_SUCCESS)
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return false;
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DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
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meminfo->total = static_cast<int>(hostinfo.max_mem / 1024);
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vm_statistics64_data_t vm_info;
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count = HOST_VM_INFO64_COUNT;
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if (host_statistics64(host.get(), HOST_VM_INFO64,
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reinterpret_cast<host_info64_t>(&vm_info),
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&count) != KERN_SUCCESS) {
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return false;
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}
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DCHECK_EQ(HOST_VM_INFO64_COUNT, count);
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// Check that PAGE_SIZE is divisible by 1024 (2^10).
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CHECK_EQ(PAGE_SIZE, (PAGE_SIZE >> 10) << 10);
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meminfo->free = saturated_cast<int>(
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PAGE_SIZE / 1024 * (vm_info.free_count - vm_info.speculative_count));
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meminfo->speculative =
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saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.speculative_count);
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meminfo->file_backed =
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saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.external_page_count);
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meminfo->purgeable =
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saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.purgeable_count);
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return true;
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}
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} // namespace base
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