DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (b66b287a2650)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
// 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 <sys/utsname.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.
  static 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;
}

// static
bool SysInfo::HasEnvVar(const wchar_t* var) {
  std::string var_utf8 = WideToUTF8(std::wstring(var));
  return getenv(var_utf8.c_str()) != NULL;
}

// static
std::wstring SysInfo::GetEnvVar(const wchar_t* var) {
  std::string var_utf8 = WideToUTF8(std::wstring(var));
  char* value = getenv(var_utf8.c_str());
  if (!value) {
    return L"";
  } else {
    return UTF8ToWide(value);
  }
}

// static
std::string SysInfo::OperatingSystemName() {
  utsname info;
  if (uname(&info) < 0) {
    NOTREACHED();
    return "";
  }
  return std::string(info.sysname);
}

// static
std::string SysInfo::OperatingSystemVersion() {
  utsname info;
  if (uname(&info) < 0) {
    NOTREACHED();
    return "";
  }
  return std::string(info.release);
}

// static
std::string SysInfo::CPUArchitecture() {
  utsname info;
  if (uname(&info) < 0) {
    NOTREACHED();
    return "";
  }
  return std::string(info.machine);
}

// static
void SysInfo::GetPrimaryDisplayDimensions(int* width, int* height) {
  NOTIMPLEMENTED();
}

// static
int SysInfo::DisplayCount() {
  NOTIMPLEMENTED();
  return 1;
}

// static
size_t SysInfo::VMAllocationGranularity() {
  return getpagesize();
}

}  // namespace base