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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/process/process.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "base/metrics/field_trial.h" | |
| 10 #include "base/numerics/safe_conversions.h" | |
| 11 #include "base/process/kill.h" | |
| 12 #include "base/win/windows_version.h" | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 DWORD kBasicProcessAccess = | |
| 17 PROCESS_TERMINATE | PROCESS_QUERY_INFORMATION | SYNCHRONIZE; | |
| 18 | |
| 19 } // namespace | |
| 20 | |
| 21 namespace base { | |
| 22 | |
| 23 Process::Process(ProcessHandle handle) | |
| 24 : is_current_process_(false), | |
| 25 process_(handle) { | |
| 26 CHECK_NE(handle, ::GetCurrentProcess()); | |
| 27 } | |
| 28 | |
| 29 Process::Process(RValue other) | |
| 30 : is_current_process_(other.object->is_current_process_), | |
| 31 process_(other.object->process_.Take()) { | |
| 32 other.object->Close(); | |
| 33 } | |
| 34 | |
| 35 Process::~Process() { | |
| 36 } | |
| 37 | |
| 38 Process& Process::operator=(RValue other) { | |
| 39 if (this != other.object) { | |
| 40 process_.Set(other.object->process_.Take()); | |
| 41 is_current_process_ = other.object->is_current_process_; | |
| 42 other.object->Close(); | |
| 43 } | |
| 44 return *this; | |
| 45 } | |
| 46 | |
| 47 // static | |
| 48 Process Process::Current() { | |
| 49 Process process; | |
| 50 process.is_current_process_ = true; | |
| 51 return process.Pass(); | |
| 52 } | |
| 53 | |
| 54 // static | |
| 55 Process Process::Open(ProcessId pid) { | |
| 56 return Process(::OpenProcess(kBasicProcessAccess, FALSE, pid)); | |
| 57 } | |
| 58 | |
| 59 // static | |
| 60 Process Process::OpenWithExtraPrivileges(ProcessId pid) { | |
| 61 DWORD access = kBasicProcessAccess | PROCESS_DUP_HANDLE | PROCESS_VM_READ; | |
| 62 return Process(::OpenProcess(access, FALSE, pid)); | |
| 63 } | |
| 64 | |
| 65 // static | |
| 66 Process Process::OpenWithAccess(ProcessId pid, DWORD desired_access) { | |
| 67 return Process(::OpenProcess(desired_access, FALSE, pid)); | |
| 68 } | |
| 69 | |
| 70 // static | |
| 71 Process Process::DeprecatedGetProcessFromHandle(ProcessHandle handle) { | |
| 72 DCHECK_NE(handle, ::GetCurrentProcess()); | |
| 73 ProcessHandle out_handle; | |
| 74 if (!::DuplicateHandle(GetCurrentProcess(), handle, | |
| 75 GetCurrentProcess(), &out_handle, | |
| 76 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
| 77 return Process(); | |
| 78 } | |
| 79 return Process(out_handle); | |
| 80 } | |
| 81 | |
| 82 // static | |
| 83 bool Process::CanBackgroundProcesses() { | |
| 84 return true; | |
| 85 } | |
| 86 | |
| 87 bool Process::IsValid() const { | |
| 88 return process_.IsValid() || is_current(); | |
| 89 } | |
| 90 | |
| 91 ProcessHandle Process::Handle() const { | |
| 92 return is_current_process_ ? GetCurrentProcess() : process_.Get(); | |
| 93 } | |
| 94 | |
| 95 Process Process::Duplicate() const { | |
| 96 if (is_current()) | |
| 97 return Current(); | |
| 98 | |
| 99 ProcessHandle out_handle; | |
| 100 if (!IsValid() || !::DuplicateHandle(GetCurrentProcess(), | |
| 101 Handle(), | |
| 102 GetCurrentProcess(), | |
| 103 &out_handle, | |
| 104 0, | |
| 105 FALSE, | |
| 106 DUPLICATE_SAME_ACCESS)) { | |
| 107 return Process(); | |
| 108 } | |
| 109 return Process(out_handle); | |
| 110 } | |
| 111 | |
| 112 ProcessId Process::Pid() const { | |
| 113 DCHECK(IsValid()); | |
| 114 return GetProcId(Handle()); | |
| 115 } | |
| 116 | |
| 117 bool Process::is_current() const { | |
| 118 return is_current_process_; | |
| 119 } | |
| 120 | |
| 121 void Process::Close() { | |
| 122 is_current_process_ = false; | |
| 123 if (!process_.IsValid()) | |
| 124 return; | |
| 125 | |
| 126 process_.Close(); | |
| 127 } | |
| 128 | |
| 129 bool Process::Terminate(int exit_code, bool wait) const { | |
| 130 DCHECK(IsValid()); | |
| 131 bool result = (::TerminateProcess(Handle(), exit_code) != FALSE); | |
| 132 if (result && wait) { | |
| 133 // The process may not end immediately due to pending I/O | |
| 134 if (::WaitForSingleObject(Handle(), 60 * 1000) != WAIT_OBJECT_0) | |
| 135 DPLOG(ERROR) << "Error waiting for process exit"; | |
| 136 } else if (!result) { | |
| 137 DPLOG(ERROR) << "Unable to terminate process"; | |
| 138 } | |
| 139 return result; | |
| 140 } | |
| 141 | |
| 142 bool Process::WaitForExit(int* exit_code) { | |
| 143 return WaitForExitWithTimeout(TimeDelta::FromMilliseconds(INFINITE), | |
| 144 exit_code); | |
| 145 } | |
| 146 | |
| 147 bool Process::WaitForExitWithTimeout(TimeDelta timeout, int* exit_code) { | |
| 148 // Limit timeout to INFINITE. | |
| 149 DWORD timeout_ms = saturated_cast<DWORD>(timeout.InMilliseconds()); | |
| 150 if (::WaitForSingleObject(Handle(), timeout_ms) != WAIT_OBJECT_0) | |
| 151 return false; | |
| 152 | |
| 153 DWORD temp_code; // Don't clobber out-parameters in case of failure. | |
| 154 if (!::GetExitCodeProcess(Handle(), &temp_code)) | |
| 155 return false; | |
| 156 | |
| 157 if (exit_code) | |
| 158 *exit_code = temp_code; | |
| 159 return true; | |
| 160 } | |
| 161 | |
| 162 bool Process::IsProcessBackgrounded() const { | |
| 163 DCHECK(IsValid()); | |
| 164 DWORD priority = GetPriority(); | |
| 165 if (priority == 0) | |
| 166 return false; // Failure case. | |
| 167 return ((priority == BELOW_NORMAL_PRIORITY_CLASS) || | |
| 168 (priority == IDLE_PRIORITY_CLASS)); | |
| 169 } | |
| 170 | |
| 171 bool Process::SetProcessBackgrounded(bool value) { | |
| 172 DCHECK(IsValid()); | |
| 173 // Vista and above introduce a real background mode, which not only | |
| 174 // sets the priority class on the threads but also on the IO generated | |
| 175 // by it. Unfortunately it can only be set for the calling process. | |
| 176 DWORD priority; | |
| 177 if ((base::win::GetVersion() >= base::win::VERSION_VISTA) && (is_current())) { | |
| 178 priority = value ? PROCESS_MODE_BACKGROUND_BEGIN : | |
| 179 PROCESS_MODE_BACKGROUND_END; | |
| 180 } else { | |
| 181 // Experiment (http://crbug.com/458594) with using IDLE_PRIORITY_CLASS as a | |
| 182 // background priority for background renderers (this code path is | |
| 183 // technically for more than just the renderers but they're the only use | |
| 184 // case in practice and experimenting here direclty is thus easier -- plus | |
| 185 // it doesn't really hurt as above we already state our intent of using | |
| 186 // PROCESS_MODE_BACKGROUND_BEGIN if available which is essentially | |
| 187 // IDLE_PRIORITY_CLASS plus lowered IO priority). Enabled by default in the | |
| 188 // asbence of field trials to get coverage on the perf waterfall. | |
| 189 DWORD background_priority = IDLE_PRIORITY_CLASS; | |
| 190 base::FieldTrial* trial = | |
| 191 base::FieldTrialList::Find("BackgroundRendererProcesses"); | |
| 192 if (trial && trial->group_name() == "AllowBelowNormalFromBrowser") | |
| 193 background_priority = BELOW_NORMAL_PRIORITY_CLASS; | |
| 194 | |
| 195 priority = value ? background_priority : NORMAL_PRIORITY_CLASS; | |
| 196 } | |
| 197 | |
| 198 return (::SetPriorityClass(Handle(), priority) != 0); | |
| 199 } | |
| 200 | |
| 201 int Process::GetPriority() const { | |
| 202 DCHECK(IsValid()); | |
| 203 return ::GetPriorityClass(Handle()); | |
| 204 } | |
| 205 | |
| 206 } // namespace base | |
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Chromium Code Reviews
Issue 1446363003:
Deleted OS_WIN and all Windows specific files from base. (Closed)
Base URL: https://github.com/domokit/mojo.git@base_tests