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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/process/internal_linux.h" | 5 #include "base/process/internal_linux.h" |
6 | 6 |
7 #include <limits.h> | 7 #include <limits.h> |
8 #include <unistd.h> | 8 #include <unistd.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
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126 | 126 |
127 size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats, | 127 size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats, |
128 ProcStatsFields field_num) { | 128 ProcStatsFields field_num) { |
129 DCHECK_GE(field_num, VM_PPID); | 129 DCHECK_GE(field_num, VM_PPID); |
130 CHECK_LT(static_cast<size_t>(field_num), proc_stats.size()); | 130 CHECK_LT(static_cast<size_t>(field_num), proc_stats.size()); |
131 | 131 |
132 size_t value; | 132 size_t value; |
133 return StringToSizeT(proc_stats[field_num], &value) ? value : 0; | 133 return StringToSizeT(proc_stats[field_num], &value) ? value : 0; |
134 } | 134 } |
135 | 135 |
136 int64_t ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num) { | 136 int64_t ReadStatFileAndGetFieldAsInt64(const FilePath& stat_file, |
| 137 ProcStatsFields field_num) { |
137 std::string stats_data; | 138 std::string stats_data; |
138 if (!ReadProcStats(pid, &stats_data)) | 139 if (!ReadProcFile(stat_file, &stats_data)) |
139 return 0; | 140 return 0; |
140 std::vector<std::string> proc_stats; | 141 std::vector<std::string> proc_stats; |
141 if (!ParseProcStats(stats_data, &proc_stats)) | 142 if (!ParseProcStats(stats_data, &proc_stats)) |
142 return 0; | 143 return 0; |
143 return GetProcStatsFieldAsInt64(proc_stats, field_num); | 144 return GetProcStatsFieldAsInt64(proc_stats, field_num); |
144 } | 145 } |
145 | 146 |
| 147 int64_t ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num) { |
| 148 FilePath stat_file = internal::GetProcPidDir(pid).Append(kStatFile); |
| 149 return ReadStatFileAndGetFieldAsInt64(stat_file, field_num); |
| 150 } |
| 151 |
| 152 int64_t ReadProcSelfStatsAndGetFieldAsInt64(ProcStatsFields field_num) { |
| 153 FilePath stat_file = FilePath(kProcDir).Append("self").Append(kStatFile); |
| 154 return ReadStatFileAndGetFieldAsInt64(stat_file, field_num); |
| 155 } |
| 156 |
146 size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid, | 157 size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid, |
147 ProcStatsFields field_num) { | 158 ProcStatsFields field_num) { |
148 std::string stats_data; | 159 std::string stats_data; |
149 if (!ReadProcStats(pid, &stats_data)) | 160 if (!ReadProcStats(pid, &stats_data)) |
150 return 0; | 161 return 0; |
151 std::vector<std::string> proc_stats; | 162 std::vector<std::string> proc_stats; |
152 if (!ParseProcStats(stats_data, &proc_stats)) | 163 if (!ParseProcStats(stats_data, &proc_stats)) |
153 return 0; | 164 return 0; |
154 return GetProcStatsFieldAsSizeT(proc_stats, field_num); | 165 return GetProcStatsFieldAsSizeT(proc_stats, field_num); |
155 } | 166 } |
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206 // which means the answer is 100. | 217 // which means the answer is 100. |
207 // It may be the case that this value is always 100. | 218 // It may be the case that this value is always 100. |
208 static const int kHertz = sysconf(_SC_CLK_TCK); | 219 static const int kHertz = sysconf(_SC_CLK_TCK); |
209 | 220 |
210 return TimeDelta::FromMicroseconds( | 221 return TimeDelta::FromMicroseconds( |
211 Time::kMicrosecondsPerSecond * clock_ticks / kHertz); | 222 Time::kMicrosecondsPerSecond * clock_ticks / kHertz); |
212 } | 223 } |
213 | 224 |
214 } // namespace internal | 225 } // namespace internal |
215 } // namespace base | 226 } // namespace base |
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