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// Copyright (c) 2008 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 "base/basictypes.h"
#include <errno.h>
#include <string.h>
#include <sys/statvfs.h>
#include <unistd.h>
#if defined(OS_MACOSX)
#include <mach/mach_host.h>
#include <mach/mach_init.h>
#endif
#include "base/logging.h"
#include "base/string_util.h"
namespace base {
int SysInfo::NumberOfProcessors() {
// It seems that sysconf returns the number of "logical" processors on both
// mac and linux. So we get the number of "online logical" processors.
long res = sysconf(_SC_NPROCESSORS_ONLN);
if (res == -1) {
NOTREACHED();
return 1;
}
return static_cast<int>(res);
}
// static
int64 SysInfo::AmountOfPhysicalMemory() {
// _SC_PHYS_PAGES is not part of POSIX and not available on OS X
#if defined(OS_MACOSX)
struct host_basic_info hostinfo;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
int result = host_info(mach_host_self(),
HOST_BASIC_INFO,
reinterpret_cast<host_info_t>(&hostinfo),
&count);
DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
if (result != KERN_SUCCESS) {
NOTREACHED();
return 0;
}
return static_cast<int64>(hostinfo.max_mem);
#else
long pages = sysconf(_SC_PHYS_PAGES);
long page_size = sysconf(_SC_PAGE_SIZE);
if (pages == -1 || page_size == -1) {
NOTREACHED();
return 0;
}
return static_cast<int64>(pages) * page_size;
#endif
}
// static
int64 SysInfo::AmountOfFreeDiskSpace(const std::wstring& path) {
struct statvfs stats;
if (statvfs(WideToUTF8(path).c_str(), &stats) != 0) {
return -1;
}
return static_cast<int64>(stats.f_bavail) * stats.f_frsize;
}
} // namespace base
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