fjricci updated this revision to Diff 115691.
fjricci added a comment.
Herald added subscribers: JDevlieghere, mgorny.
Move TaskPool from Utility to Host
https://reviews.llvm.org/D37930
Files:
include/lldb/Host/TaskPool.h
include/lldb/Utility/TaskPool.h
lldb.xcodeproj/project.pbxproj
source/Host/CMakeLists.txt
source/Host/common/TaskPool.cpp
source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
source/Utility/CMakeLists.txt
source/Utility/TaskPool.cpp
unittests/Host/CMakeLists.txt
unittests/Host/TaskPoolTest.cpp
unittests/Utility/CMakeLists.txt
unittests/Utility/TaskPoolTest.cpp
Index: unittests/Utility/CMakeLists.txt
===================================================================
--- unittests/Utility/CMakeLists.txt
+++ unittests/Utility/CMakeLists.txt
@@ -8,7 +8,6 @@
StatusTest.cpp
StringExtractorTest.cpp
StructuredDataTest.cpp
- TaskPoolTest.cpp
TildeExpressionResolverTest.cpp
TimeoutTest.cpp
TimerTest.cpp
Index: unittests/Host/TaskPoolTest.cpp
===================================================================
--- unittests/Host/TaskPoolTest.cpp
+++ unittests/Host/TaskPoolTest.cpp
@@ -1,6 +1,6 @@
#include "gtest/gtest.h"
-#include "lldb/Utility/TaskPool.h"
+#include "lldb/Host/TaskPool.h"
TEST(TaskPoolTest, AddTask) {
auto fn = [](int x) { return x * x + 1; };
Index: unittests/Host/CMakeLists.txt
===================================================================
--- unittests/Host/CMakeLists.txt
+++ unittests/Host/CMakeLists.txt
@@ -6,6 +6,7 @@
SocketAddressTest.cpp
SocketTest.cpp
SymbolsTest.cpp
+ TaskPoolTest.cpp
)
if (CMAKE_SYSTEM_NAME MATCHES "Linux|Android")
Index: source/Utility/CMakeLists.txt
===================================================================
--- source/Utility/CMakeLists.txt
+++ source/Utility/CMakeLists.txt
@@ -29,7 +29,6 @@
StringLexer.cpp
StringList.cpp
StructuredData.cpp
- TaskPool.cpp
TildeExpressionResolver.cpp
Timer.cpp
UserID.cpp
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -53,7 +53,7 @@
#include "lldb/Target/Language.h"
-#include "lldb/Utility/TaskPool.h"
+#include "lldb/Host/TaskPool.h"
#include "DWARFASTParser.h"
#include "DWARFASTParserClang.h"
Index: source/Host/common/TaskPool.cpp
===================================================================
--- source/Host/common/TaskPool.cpp
+++ source/Host/common/TaskPool.cpp
@@ -7,7 +7,8 @@
//
//===----------------------------------------------------------------------===//
-#include "lldb/Utility/TaskPool.h"
+#include "lldb/Host/TaskPool.h"
+#include "lldb/Host/ThreadLauncher.h"
#include <cstdint> // for uint32_t
#include <queue> // for queue
@@ -23,6 +24,8 @@
private:
TaskPoolImpl();
+ static lldb::thread_result_t WorkerPtr(void *pool);
+
static void Worker(TaskPoolImpl *pool);
std::queue<std::function<void()>> m_tasks;
@@ -45,6 +48,7 @@
void TaskPoolImpl::AddTask(std::function<void()> &&task_fn) {
static const uint32_t max_threads = std::thread::hardware_concurrency();
+ const size_t min_stack_size = 8 * 1024 * 1024;
std::unique_lock<std::mutex> lock(m_tasks_mutex);
m_tasks.emplace(std::move(task_fn));
@@ -54,10 +58,17 @@
// This prevents the thread
// from exiting prematurely and triggering a linux libc bug
// (https://sourceware.org/bugzilla/show_bug.cgi?id=19951).
- std::thread(Worker, this).detach();
+ lldb_private::ThreadLauncher::LaunchThread("task-pool.worker", WorkerPtr,
+ this, nullptr, min_stack_size)
+ .Release();
}
}
+lldb::thread_result_t TaskPoolImpl::WorkerPtr(void *pool) {
+ Worker((TaskPoolImpl *)pool);
+ return 0;
+}
+
void TaskPoolImpl::Worker(TaskPoolImpl *pool) {
while (true) {
std::unique_lock<std::mutex> lock(pool->m_tasks_mutex);
Index: source/Host/CMakeLists.txt
===================================================================
--- source/Host/CMakeLists.txt
+++ source/Host/CMakeLists.txt
@@ -31,6 +31,7 @@
common/SoftwareBreakpoint.cpp
common/StringConvert.cpp
common/Symbols.cpp
+ common/TaskPool.cpp
common/TCPSocket.cpp
common/Terminal.cpp
common/ThreadLauncher.cpp
Index: lldb.xcodeproj/project.pbxproj
===================================================================
--- lldb.xcodeproj/project.pbxproj
+++ lldb.xcodeproj/project.pbxproj
@@ -2664,8 +2664,8 @@
6D99A3621BBC2F3200979793 /* ArmUnwindInfo.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = ArmUnwindInfo.cpp; path = source/Symbol/ArmUnwindInfo.cpp; sourceTree = "<group>"; };
6D9AB3DC1BB2B74E003F2289 /* TypeMap.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = TypeMap.cpp; path = source/Symbol/TypeMap.cpp; sourceTree = "<group>"; };
6D9AB3DE1BB2B76B003F2289 /* TypeMap.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = TypeMap.h; path = include/lldb/Symbol/TypeMap.h; sourceTree = "<group>"; };
- 6DEC6F381BD66D750091ABA6 /* TaskPool.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = TaskPool.cpp; path = source/Utility/TaskPool.cpp; sourceTree = "<group>"; };
- 6DEC6F3A1BD66D950091ABA6 /* TaskPool.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = TaskPool.h; path = include/lldb/Utility/TaskPool.h; sourceTree = "<group>"; };
+ 6DEC6F381BD66D750091ABA6 /* TaskPool.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = TaskPool.cpp; path = source/Host/common/TaskPool.cpp; sourceTree = "<group>"; };
+ 6DEC6F3A1BD66D950091ABA6 /* TaskPool.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = TaskPool.h; path = include/lldb/Host/TaskPool.h; sourceTree = "<group>"; };
8C26C4241C3EA4340031DF7C /* TSanRuntime.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = TSanRuntime.cpp; path = TSan/TSanRuntime.cpp; sourceTree = "<group>"; };
8C26C4251C3EA4340031DF7C /* TSanRuntime.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = TSanRuntime.h; path = TSan/TSanRuntime.h; sourceTree = "<group>"; };
8C2D6A52197A1EAF006989C9 /* MemoryHistory.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = MemoryHistory.cpp; path = source/Target/MemoryHistory.cpp; sourceTree = "<group>"; };
@@ -4413,8 +4413,6 @@
AFEC3361194A8ABA00FF05C6 /* StructuredData.cpp */,
94BA8B6E176F8CA0005A91B5 /* Range.h */,
94BA8B6C176F8C9B005A91B5 /* Range.cpp */,
- 6DEC6F3A1BD66D950091ABA6 /* TaskPool.h */,
- 6DEC6F381BD66D750091ABA6 /* TaskPool.cpp */,
AFF8FF0B1E779D4B003830EF /* TildeExpressionResolver.cpp */,
AFF8FF0D1E779D51003830EF /* TildeExpressionResolver.h */,
26BC7D7E10F1B77400F91463 /* Timer.h */,
@@ -5248,6 +5246,8 @@
267A47F21B14115A0021A5BC /* SoftwareBreakpoint.h */,
232CB613191E00CC00EF39FC /* SoftwareBreakpoint.cpp */,
2689B0A4113EE3CD00A4AEDB /* Symbols.h */,
+ 6DEC6F3A1BD66D950091ABA6 /* TaskPool.h */,
+ 6DEC6F381BD66D750091ABA6 /* TaskPool.cpp */,
268DA871130095D000C9483A /* Terminal.h */,
3FDFED2319BA6D55009756A7 /* ThreadLauncher.h */,
267A48031B1416080021A5BC /* XML.h */,
Index: include/lldb/Utility/TaskPool.h
===================================================================
--- /dev/null
+++ include/lldb/Utility/TaskPool.h
@@ -1,92 +0,0 @@
-//===--------------------- TaskPool.h ---------------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef utility_TaskPool_h_
-#define utility_TaskPool_h_
-
-#include "llvm/ADT/STLExtras.h"
-#include <functional> // for bind, function
-#include <future>
-#include <list>
-#include <memory> // for make_shared
-#include <mutex> // for mutex, unique_lock, condition_variable
-#include <type_traits> // for forward, result_of, move
-
-// Global TaskPool class for running tasks in parallel on a set of worker thread
-// created the first
-// time the task pool is used. The TaskPool provide no guarantee about the order
-// the task will be run
-// and about what tasks will run in parallel. None of the task added to the task
-// pool should block
-// on something (mutex, future, condition variable) what will be set only by the
-// completion of an
-// other task on the task pool as they may run on the same thread sequentally.
-class TaskPool {
-public:
- // Add a new task to the task pool and return a std::future belonging to the
- // newly created task.
- // The caller of this function has to wait on the future for this task to
- // complete.
- template <typename F, typename... Args>
- static std::future<typename std::result_of<F(Args...)>::type>
- AddTask(F &&f, Args &&... args);
-
- // Run all of the specified tasks on the task pool and wait until all of them
- // are finished
- // before returning. This method is intended to be used for small number tasks
- // where listing
- // them as function arguments is acceptable. For running large number of tasks
- // you should use
- // AddTask for each task and then call wait() on each returned future.
- template <typename... T> static void RunTasks(T &&... tasks);
-
-private:
- TaskPool() = delete;
-
- template <typename... T> struct RunTaskImpl;
-
- static void AddTaskImpl(std::function<void()> &&task_fn);
-};
-
-template <typename F, typename... Args>
-std::future<typename std::result_of<F(Args...)>::type>
-TaskPool::AddTask(F &&f, Args &&... args) {
- auto task_sp = std::make_shared<
- std::packaged_task<typename std::result_of<F(Args...)>::type()>>(
- std::bind(std::forward<F>(f), std::forward<Args>(args)...));
-
- AddTaskImpl([task_sp]() { (*task_sp)(); });
-
- return task_sp->get_future();
-}
-
-template <typename... T> void TaskPool::RunTasks(T &&... tasks) {
- RunTaskImpl<T...>::Run(std::forward<T>(tasks)...);
-}
-
-template <typename Head, typename... Tail>
-struct TaskPool::RunTaskImpl<Head, Tail...> {
- static void Run(Head &&h, Tail &&... t) {
- auto f = AddTask(std::forward<Head>(h));
- RunTaskImpl<Tail...>::Run(std::forward<Tail>(t)...);
- f.wait();
- }
-};
-
-template <> struct TaskPool::RunTaskImpl<> {
- static void Run() {}
-};
-
-// Run 'func' on every value from begin .. end-1. Each worker will grab
-// 'batch_size' numbers at a time to work on, so for very fast functions, batch
-// should be large enough to avoid too much cache line contention.
-void TaskMapOverInt(size_t begin, size_t end,
- const llvm::function_ref<void(size_t)> &func);
-
-#endif // #ifndef utility_TaskPool_h_
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