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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/sys_info.h"
#include <stddef.h>
#include <stdint.h>
#include <sys/param.h>
#include <sys/shm.h>
#include <sys/sysctl.h>
#include "base/logging.h"
#include "base/macros.h"
namespace {
int64_t AmountOfMemory(int pages_name) {
long pages = sysconf(pages_name);
long page_size = sysconf(_SC_PAGESIZE);
if (pages == -1 || page_size == -1) {
NOTREACHED();
return 0;
}
return static_cast<int64_t>(pages) * page_size;
}
} // namespace
namespace base {
// static
int SysInfo::NumberOfProcessors() {
int mib[] = { CTL_HW, HW_NCPU };
int ncpu;
size_t size = sizeof(ncpu);
if (sysctl(mib, arraysize(mib), &ncpu, &size, NULL, 0) < 0) {
NOTREACHED();
return 1;
}
return ncpu;
}
// static
int64_t SysInfo::AmountOfPhysicalMemory() {
return AmountOfMemory(_SC_PHYS_PAGES);
}
// static
int64_t SysInfo::AmountOfAvailablePhysicalMemory() {
return AmountOfMemory(_SC_AVPHYS_PAGES);
}
// static
uint64_t SysInfo::MaxSharedMemorySize() {
int mib[] = { CTL_KERN, KERN_SHMINFO, KERN_SHMINFO_SHMMAX };
size_t limit;
size_t size = sizeof(limit);
if (sysctl(mib, arraysize(mib), &limit, &size, NULL, 0) < 0) {
NOTREACHED();
return 0;
}
return static_cast<uint64_t>(limit);
}
// static
std::string SysInfo::CPUModelName() {
int mib[] = { CTL_HW, HW_MODEL };
char name[256];
size_t len = arraysize(name);
if (sysctl(mib, arraysize(mib), name, &len, NULL, 0) < 0) {
NOTREACHED();
return std::string();
}
return name;
}
} // namespace base
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