. /src /ex /thread_pool.cpp
99.34% Lines (150/151) 100.00% Functions (28/28)
[ ] prev/next file n p prev/next uncovered line
TLA Baseline Branch
Line Hits Code Line Hits Code
1   // 1   //
2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) 2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com)
3   // Copyright (c) 2026 Michael Vandeberg 3   // Copyright (c) 2026 Michael Vandeberg
4   // 4   //
5   // Distributed under the Boost Software License, Version 1.0. (See accompanying 5   // Distributed under the Boost Software License, Version 1.0. (See accompanying
6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7   // 7   //
8   // Official repository: https://github.com/boostorg/capy 8   // Official repository: https://github.com/boostorg/capy
9   // 9   //
10   10  
11   #include <boost/capy/ex/thread_pool.hpp> 11   #include <boost/capy/ex/thread_pool.hpp>
12   #include <boost/capy/continuation.hpp> 12   #include <boost/capy/continuation.hpp>
13   #include <boost/capy/detail/thread_local_ptr.hpp> 13   #include <boost/capy/detail/thread_local_ptr.hpp>
14   #include <boost/capy/ex/abandon.hpp> 14   #include <boost/capy/ex/abandon.hpp>
15   #include <boost/capy/ex/frame_allocator.hpp> 15   #include <boost/capy/ex/frame_allocator.hpp>
16   #include <boost/capy/test/thread_name.hpp> 16   #include <boost/capy/test/thread_name.hpp>
17   #include <algorithm> 17   #include <algorithm>
18   #include <atomic> 18   #include <atomic>
19   #include <condition_variable> 19   #include <condition_variable>
20   #include <cstdio> 20   #include <cstdio>
21   #include <mutex> 21   #include <mutex>
22   #include <thread> 22   #include <thread>
23   #include <vector> 23   #include <vector>
24   24  
25   /* 25   /*
26   Thread pool implementation using a shared work queue. 26   Thread pool implementation using a shared work queue.
27   27  
28   Work items are continuations linked via their intrusive next pointer, 28   Work items are continuations linked via their intrusive next pointer,
29   stored in a single queue protected by a mutex. No per-post heap 29   stored in a single queue protected by a mutex. No per-post heap
30   allocation: the continuation is owned by the caller and linked 30   allocation: the continuation is owned by the caller and linked
31   directly. Worker threads wait on a condition_variable until work 31   directly. Worker threads wait on a condition_variable until work
32   is available or stop is requested. 32   is available or stop is requested.
33   33  
34   Threads are started lazily on first post(), under mutex_, to avoid 34   Threads are started lazily on first post(), under mutex_, to avoid
35   spawning threads for pools that are constructed but never used. A 35   spawning threads for pools that are constructed but never used. A
36   stopped pool starts none. Each thread is named 36   stopped pool starts none. Each thread is named
37   with a configurable prefix plus index for debugger visibility. 37   with a configurable prefix plus index for debugger visibility.
38   38  
39   Work tracking: on_work_started/on_work_finished maintain the atomic 39   Work tracking: on_work_started/on_work_finished maintain the atomic
40   outstanding_work_ counter. on_work_started is lock-free, and so is 40   outstanding_work_ counter. on_work_started is lock-free, and so is
41   on_work_finished while the count stays above one. The release that 41   on_work_finished while the count stays above one. The release that
42   may take it to zero is made under mutex_, so join() can't see zero, 42   may take it to zero is made under mutex_, so join() can't see zero,
43   return and let the pool be destroyed while that call still uses it. 43   return and let the pool be destroyed while that call still uses it.
44   join() blocks until this counter reaches zero, then signals workers 44   join() blocks until this counter reaches zero, then signals workers
45   to stop and joins threads. 45   to stop and joins threads.
46   46  
47   Two shutdown paths: 47   Two shutdown paths:
48   - join(): waits for outstanding work to drain, then stops workers. 48   - join(): waits for outstanding work to drain, then stops workers.
49   - stop(): immediately signals workers to exit; queued work stays queued. 49   - stop(): immediately signals workers to exit; queued work stays queued.
50   - Destructor: stop() then join(), then queued work is abandoned. 50   - Destructor: stop() then join(), then queued work is abandoned.
51   */ 51   */
52   52  
53   namespace boost { 53   namespace boost {
54   namespace capy { 54   namespace capy {
55   55  
56   //------------------------------------------------------------------------------ 56   //------------------------------------------------------------------------------
57   57  
58   class thread_pool::impl 58   class thread_pool::impl
59   { 59   {
60   // Identifies the pool owning the current worker thread, or 60   // Identifies the pool owning the current worker thread, or
61   // nullptr if the calling thread is not a pool worker. Checked 61   // nullptr if the calling thread is not a pool worker. Checked
62   // by dispatch() to decide between symmetric transfer (inline 62   // by dispatch() to decide between symmetric transfer (inline
63   // resume) and post. 63   // resume) and post.
64   static inline detail::thread_local_ptr<impl const> current_; 64   static inline detail::thread_local_ptr<impl const> current_;
65   65  
66   // Intrusive queue of continuations: the next link is stored in 66   // Intrusive queue of continuations: the next link is stored in
67   // continuation::reserved (typed continuation* round-tripped through 67   // continuation::reserved (typed continuation* round-tripped through
68   // void*). No per-post allocation: the continuation is owned by the caller. 68   // void*). No per-post allocation: the continuation is owned by the caller.
69   continuation* head_ = nullptr; 69   continuation* head_ = nullptr;
70   continuation* tail_ = nullptr; 70   continuation* tail_ = nullptr;
71   71  
HITCBC 72   21267 void push(continuation* c) noexcept 72   23824 void push(continuation* c) noexcept
73   { 73   {
HITCBC 74   21267 c->reserved = nullptr; 74   23824 c->reserved = nullptr;
HITCBC 75   21267 if(tail_) 75   23824 if(tail_)
HITCBC 76   3812 tail_->reserved = c; 76   3270 tail_->reserved = c;
77   else 77   else
HITCBC 78   17455 head_ = c; 78   20554 head_ = c;
HITCBC 79   21267 tail_ = c; 79   23824 tail_ = c;
HITCBC 80   21267 } 80   23824 }
81   81  
HITCBC 82   24137 continuation* pop() noexcept 82   26668 continuation* pop() noexcept
83   { 83   {
HITCBC 84   24137 if(!head_) 84   26668 if(!head_)
HITCBC 85   2870 return nullptr; 85   2844 return nullptr;
HITCBC 86   21267 continuation* c = head_; 86   23824 continuation* c = head_;
HITCBC 87   21267 head_ = static_cast<continuation*>(head_->reserved); 87   23824 head_ = static_cast<continuation*>(head_->reserved);
HITCBC 88   21267 if(!head_) 88   23824 if(!head_)
HITCBC 89   17455 tail_ = nullptr; 89   20554 tail_ = nullptr;
HITCBC 90   21267 return c; 90   23824 return c;
91   } 91   }
92   92  
HITCBC 93   38755 bool empty() const noexcept 93   44472 bool empty() const noexcept
94   { 94   {
HITCBC 95   38755 return head_ == nullptr; 95   44472 return head_ == nullptr;
96   } 96   }
97   97  
98   std::mutex mutex_; 98   std::mutex mutex_;
99   std::condition_variable work_cv_; 99   std::condition_variable work_cv_;
100   std::condition_variable done_cv_; 100   std::condition_variable done_cv_;
101   std::vector<std::thread> threads_; 101   std::vector<std::thread> threads_;
102   std::atomic<std::size_t> outstanding_work_{0}; 102   std::atomic<std::size_t> outstanding_work_{0};
103   bool stop_{false}; 103   bool stop_{false};
104   bool joined_{false}; 104   bool joined_{false};
105   std::size_t num_threads_; 105   std::size_t num_threads_;
106   char thread_name_prefix_[13]{}; // 12 chars max + null terminator 106   char thread_name_prefix_[13]{}; // 12 chars max + null terminator
107   std::atomic<bool> started_{false}; 107   std::atomic<bool> started_{false};
108   108  
109   public: 109   public:
HITCBC 110   1435 ~impl() = default; 110   1422 ~impl() = default;
111   111  
112   bool 112   bool
HITCBC 113   3216 running_in_this_thread() const noexcept 113   3203 running_in_this_thread() const noexcept
114   { 114   {
HITCBC 115   3216 return current_.get() == this; 115   3203 return current_.get() == this;
116   } 116   }
117   117  
118   // Abandon queued coroutines. Each is taken under the lock, as other 118   // Abandon queued coroutines. Each is taken under the lock, as other
119   // threads may still post, and abandoned outside it, as abandoning 119   // threads may still post, and abandoned outside it, as abandoning
120   // can post. 120   // can post.
121   void 121   void
HITCBC 122   2870 drain_abandoned() noexcept 122   2844 drain_abandoned() noexcept
123   { 123   {
124   for(;;) 124   for(;;)
125   { 125   {
126   continuation* c; 126   continuation* c;
127   { 127   {
HITCBC 128   3413 std::lock_guard<std::mutex> lock(mutex_); 128   3404 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 129   3413 c = pop(); 129   3404 c = pop();
HITCBC 130   3413 } 130   3404 }
HITCBC 131   3413 if(!c) 131   3404 if(!c)
HITCBC 132   2870 return; 132   2844 return;
HITCBC 133   543 if(c->h && c->h != std::noop_coroutine()) 133   560 if(c->h && c->h != std::noop_coroutine())
HITCBC 134   290 capy::abandon(*c); 134   307 capy::abandon(*c);
HITCBC 135   543 } 135   560 }
136   } 136   }
137   137  
HITCBC 138   1435 impl(std::size_t num_threads, std::string_view thread_name_prefix) 138   1422 impl(std::size_t num_threads, std::string_view thread_name_prefix)
HITCBC 139   1435 : num_threads_(num_threads) 139   1422 : num_threads_(num_threads)
140   { 140   {
HITCBC 141   1435 if(num_threads_ == 0) 141   1422 if(num_threads_ == 0)
HITCBC 142   8 num_threads_ = std::max( 142   8 num_threads_ = std::max(
HITCBC 143   4 std::thread::hardware_concurrency(), 1u); 143   4 std::thread::hardware_concurrency(), 1u);
144   144  
145   // Truncate prefix to 12 chars, leaving room for up to 3-digit index. 145   // Truncate prefix to 12 chars, leaving room for up to 3-digit index.
HITCBC 146   1435 auto n = thread_name_prefix.copy(thread_name_prefix_, 12); 146   1422 auto n = thread_name_prefix.copy(thread_name_prefix_, 12);
HITCBC 147   1435 thread_name_prefix_[n] = '\0'; 147   1422 thread_name_prefix_[n] = '\0';
HITCBC 148   1435 } 148   1422 }
149   149  
150   void 150   void
HITCBC 151   21269 post(continuation& c) 151   23826 post(continuation& c)
152   { 152   {
HITCBC 153   21269 if(!started_.load(std::memory_order_acquire)) 153   23826 if(!started_.load(std::memory_order_acquire))
154   { 154   {
155   { 155   {
HITCBC 156   600 std::lock_guard<std::mutex> lock(mutex_); 156   587 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 157   600 if(stop_) 157   587 if(stop_)
158   { 158   {
159   // Stopped before any thread started: nothing will 159   // Stopped before any thread started: nothing will
160   // run it, and the destructor's drain abandons it. 160   // run it, and the destructor's drain abandons it.
HITCBC 161   220 push(&c); 161   220 push(&c);
HITCBC 162   220 return; 162   220 return;
163   } 163   }
HITCBC 164   600 } 164   587 }
HITCBC 165   380 ensure_started(); 165   367 ensure_started();
166   } 166   }
HITCBC 167   21047 std::lock_guard<std::mutex> lock(mutex_); 167   23604 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 168   21047 push(&c); 168   23604 push(&c);
169   // Under the lock so the pool cannot drain, join, and 169   // Under the lock so the pool cannot drain, join, and
170   // destroy the condition variable mid-signal. 170   // destroy the condition variable mid-signal.
HITCBC 171   21047 work_cv_.notify_one(); 171   23604 work_cv_.notify_one();
HITCBC 172   21047 } 172   23604 }
173   173  
174   void 174   void
HITCBC 175   4093 on_work_started() noexcept 175   4080 on_work_started() noexcept
176   { 176   {
HITCBC 177   4093 outstanding_work_.fetch_add(1, std::memory_order_acq_rel); 177   4080 outstanding_work_.fetch_add(1, std::memory_order_acq_rel);
HITCBC 178   4093 } 178   4080 }
179   179  
180   void 180   void
HITCBC 181   3793 on_work_finished() noexcept 181   3780 on_work_finished() noexcept
182   { 182   {
HITCBC 183   3793 auto n = outstanding_work_.load(std::memory_order_relaxed); 183   3780 auto n = outstanding_work_.load(std::memory_order_relaxed);
HITCBC 184   3800 while(n > 1) 184   3784 while(n > 1)
185   { 185   {
HITCBC 186   2654 if(outstanding_work_.compare_exchange_weak( 186   902 if(outstanding_work_.compare_exchange_weak(
187   n, n - 1, std::memory_order_acq_rel)) 187   n, n - 1, std::memory_order_acq_rel))
HITCBC 188   1320 return; 188   447 return;
189   } 189   }
HITCBC 190   2473 std::lock_guard<std::mutex> lock(mutex_); 190   3333 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 191   2473 outstanding_work_.fetch_sub(1, std::memory_order_acq_rel); 191   3333 outstanding_work_.fetch_sub(1, std::memory_order_acq_rel);
192   // Re-read: a concurrent on_work_started() may have raised it. 192   // Re-read: a concurrent on_work_started() may have raised it.
HITCBC 193   2473 if(outstanding_work_.load( 193   3333 if(outstanding_work_.load(
HITCBC 194   2473 std::memory_order_acquire) == 0 && joined_ && !stop_) 194   3333 std::memory_order_acquire) == 0 && joined_ && !stop_)
195   { 195   {
HITCBC 196   695 stop_ = true; 196   703 stop_ = true;
HITCBC 197   695 done_cv_.notify_all(); 197   703 done_cv_.notify_all();
HITCBC 198   695 work_cv_.notify_all(); 198   703 work_cv_.notify_all();
199   } 199   }
HITCBC 200   2473 } 200   3333 }
201   201  
202   void 202   void
HITCBC 203   2727 join() noexcept 203   2701 join() noexcept
204   { 204   {
205   { 205   {
HITCBC 206   2727 std::unique_lock<std::mutex> lock(mutex_); 206   2701 std::unique_lock<std::mutex> lock(mutex_);
HITCBC 207   2727 if(joined_) 207   2701 if(joined_)
HITCBC 208   1292 return; 208   1279 return;
HITCBC 209   1435 joined_ = true; 209   1422 joined_ = true;
210   210  
HITCBC 211   1435 if(outstanding_work_.load( 211   1422 if(outstanding_work_.load(
HITCBC 212   1435 std::memory_order_acquire) == 0) 212   1422 std::memory_order_acquire) == 0)
213   { 213   {
HITCBC 214   383 stop_ = true; 214   366 stop_ = true;
HITCBC 215   383 work_cv_.notify_all(); 215   366 work_cv_.notify_all();
216   } 216   }
217   else 217   else
218   { 218   {
HITCBC 219   1052 done_cv_.wait(lock, [this]{ 219   1056 done_cv_.wait(lock, [this]{
HITCBC 220   2048 return stop_; 220   2060 return stop_;
221   }); 221   });
222   } 222   }
HITCBC 223   2727 } 223   2701 }
224   224  
HITCBC 225   1940 for(auto& t : threads_) 225   1914 for(auto& t : threads_)
HITCBC 226   505 if(t.joinable()) 226   492 if(t.joinable())
HITCBC 227   505 t.join(); 227   492 t.join();
228   } 228   }
229   229  
230   void 230   void
HITCBC 231   1738 stop() noexcept 231   1725 stop() noexcept
232   { 232   {
233   // Under the lock: the join() this releases may return and let 233   // Under the lock: the join() this releases may return and let
234   // the pool be destroyed as soon as the lock is free. 234   // the pool be destroyed as soon as the lock is free.
HITCBC 235   1738 std::lock_guard<std::mutex> lock(mutex_); 235   1725 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 236   1738 stop_ = true; 236   1725 stop_ = true;
HITCBC 237   1738 work_cv_.notify_all(); 237   1725 work_cv_.notify_all();
HITCBC 238   1738 done_cv_.notify_all(); 238   1725 done_cv_.notify_all();
HITCBC 239   1738 } 239   1725 }
240   240  
241   private: 241   private:
242   void 242   void
HITCBC 243   380 ensure_started() 243   367 ensure_started()
244   { 244   {
245   // Under the lock, so join() either sees every thread started 245   // Under the lock, so join() either sees every thread started
246   // here or makes this start none. A joined pool still starts them: 246   // here or makes this start none. A joined pool still starts them:
247   // join() may be waiting on work that needs them. 247   // join() may be waiting on work that needs them.
HITCBC 248   380 std::lock_guard<std::mutex> lock(mutex_); 248   367 std::lock_guard<std::mutex> lock(mutex_);
HITCBC 249   380 if(started_.load(std::memory_order_relaxed) || stop_) 249   367 if(started_.load(std::memory_order_relaxed) || stop_)
MISUBC 250   ✗ return; 250   ✗ return;
251   // Start at the threads already running: if an earlier call 251   // Start at the threads already running: if an earlier call
252   // threw partway, this one adds only the missing ones. 252   // threw partway, this one adds only the missing ones.
HITCBC 253   380 threads_.reserve(num_threads_); 253   367 threads_.reserve(num_threads_);
HITCBC 254   885 for(std::size_t i = threads_.size(); i < num_threads_; ++i) 254   859 for(std::size_t i = threads_.size(); i < num_threads_; ++i)
HITCBC 255   1012 threads_.emplace_back([this, i]{ run(i); }); 255   986 threads_.emplace_back([this, i]{ run(i); });
HITCBC 256   378 started_.store(true, std::memory_order_release); 256   365 started_.store(true, std::memory_order_release);
HITCBC 257   380 } 257   367 }
258   258  
259   void 259   void
HITCBC 260   505 run(std::size_t index) 260   492 run(std::size_t index)
261   { 261   {
262   // Build name; set_current_thread_name truncates to platform limits. 262   // Build name; set_current_thread_name truncates to platform limits.
263   char name[16]; 263   char name[16];
HITCBC 264   505 std::snprintf(name, sizeof(name), "%s%zu", thread_name_prefix_, index); 264   492 std::snprintf(name, sizeof(name), "%s%zu", thread_name_prefix_, index);
HITCBC 265   505 set_current_thread_name(name); 265   492 set_current_thread_name(name);
266   266  
267   // Mark this thread as a worker of this pool so dispatch() 267   // Mark this thread as a worker of this pool so dispatch()
268   // can symmetric-transfer when called from within pool work. 268   // can symmetric-transfer when called from within pool work.
269   struct scoped_pool 269   struct scoped_pool
270   { 270   {
HITCBC 271   505 scoped_pool(impl const* p) noexcept { current_.set(p); } 271   492 scoped_pool(impl const* p) noexcept { current_.set(p); }
HITCBC 272   505 ~scoped_pool() noexcept { current_.set(nullptr); } 272   492 ~scoped_pool() noexcept { current_.set(nullptr); }
HITCBC 273   505 } guard(this); 273   492 } guard(this);
274   274  
275   for(;;) 275   for(;;)
276   { 276   {
HITCBC 277   21229 continuation* c = nullptr; 277   23756 continuation* c = nullptr;
278   { 278   {
HITCBC 279   21229 std::unique_lock<std::mutex> lock(mutex_); 279   23756 std::unique_lock<std::mutex> lock(mutex_);
HITCBC 280   21229 work_cv_.wait(lock, [this]{ 280   23756 work_cv_.wait(lock, [this]{
HITCBC 281   56685 return !empty() || 281   65586 return !empty() ||
HITCBC 282   56685 stop_; 282   65586 stop_;
283   }); 283   });
HITCBC 284   21229 if(stop_) 284   23756 if(stop_)
HITCBC 285   1010 return; 285   984 return;
HITCBC 286   20724 c = pop(); 286   23264 c = pop();
HITCBC 287   21229 } 287   23756 }
HITCBC 288   20724 if(c) 288   23264 if(c)
HITCBC 289   20724 safe_resume(c->h); 289   23264 safe_resume(c->h);
HITCBC 290   20724 } 290   23264 }
HITCBC 291   505 } 291   492 }
292   }; 292   };
293   293  
294   //------------------------------------------------------------------------------ 294   //------------------------------------------------------------------------------
295   295  
HITCBC 296   1435 thread_pool:: 296   1422 thread_pool::
297   ~thread_pool() 297   ~thread_pool()
298   { 298   {
HITCBC 299   1435 impl_->stop(); 299   1422 impl_->stop();
HITCBC 300   1435 impl_->join(); 300   1422 impl_->join();
HITCBC 301   1435 shutdown(); 301   1422 shutdown();
302   // Takes what the unwinds post too, and the work of any service they 302   // Takes what the unwinds post too, and the work of any service they
303   // create, which is shut down as it is created. 303   // create, which is shut down as it is created.
HITCBC 304   1435 impl_->drain_abandoned(); 304   1422 impl_->drain_abandoned();
HITCBC 305   1435 destroy(); 305   1422 destroy();
306   // Services give up their work in shutdown(), but anything a 306   // Services give up their work in shutdown(), but anything a
307   // destructor posts anyway is still destroyed. 307   // destructor posts anyway is still destroyed.
HITCBC 308   1435 impl_->drain_abandoned(); 308   1422 impl_->drain_abandoned();
HITCBC 309   1435 delete impl_; 309   1422 delete impl_;
HITCBC 310   1435 } 310   1422 }
311   311  
HITCBC 312   1435 thread_pool:: 312   1422 thread_pool::
HITCBC 313   1435 thread_pool(std::size_t num_threads, std::string_view thread_name_prefix) 313   1422 thread_pool(std::size_t num_threads, std::string_view thread_name_prefix)
HITCBC 314   1435 : impl_(new impl(num_threads, thread_name_prefix)) 314   1422 : impl_(new impl(num_threads, thread_name_prefix))
315   { 315   {
HITCBC 316   1435 this->set_frame_allocator(std::allocator<void>{}); 316   1422 this->set_frame_allocator(std::allocator<void>{});
HITCBC 317   1435 } 317   1422 }
318   318  
319   void 319   void
HITCBC 320   1292 thread_pool:: 320   1279 thread_pool::
321   join() noexcept 321   join() noexcept
322   { 322   {
HITCBC 323   1292 impl_->join(); 323   1279 impl_->join();
HITCBC 324   1292 } 324   1279 }
325   325  
326   void 326   void
HITCBC 327   303 thread_pool:: 327   303 thread_pool::
328   stop() noexcept 328   stop() noexcept
329   { 329   {
HITCBC 330   303 impl_->stop(); 330   303 impl_->stop();
HITCBC 331   303 } 331   303 }
332   332  
333   //------------------------------------------------------------------------------ 333   //------------------------------------------------------------------------------
334   334  
335   thread_pool::executor_type 335   thread_pool::executor_type
HITCBC 336   15354 thread_pool:: 336   15341 thread_pool::
337   get_executor() const noexcept 337   get_executor() const noexcept
338   { 338   {
HITCBC 339   15354 return executor_type( 339   15341 return executor_type(
HITCBC 340   15354 const_cast<thread_pool&>(*this)); 340   15341 const_cast<thread_pool&>(*this));
341   } 341   }
342   342  
343   void 343   void
HITCBC 344   4093 thread_pool::executor_type:: 344   4080 thread_pool::executor_type::
345   on_work_started() const noexcept 345   on_work_started() const noexcept
346   { 346   {
HITCBC 347   4093 pool_->impl_->on_work_started(); 347   4080 pool_->impl_->on_work_started();
HITCBC 348   4093 } 348   4080 }
349   349  
350   void 350   void
HITCBC 351   3793 thread_pool::executor_type:: 351   3780 thread_pool::executor_type::
352   on_work_finished() const noexcept 352   on_work_finished() const noexcept
353   { 353   {
HITCBC 354   3793 pool_->impl_->on_work_finished(); 354   3780 pool_->impl_->on_work_finished();
HITCBC 355   3793 } 355   3780 }
356   356  
357   void 357   void
HITCBC 358   18060 thread_pool::executor_type:: 358   20630 thread_pool::executor_type::
359   post(continuation& c) const 359   post(continuation& c) const
360   { 360   {
HITCBC 361   18060 pool_->impl_->post(c); 361   20630 pool_->impl_->post(c);
HITCBC 362   18058 } 362   20628 }
363   363  
364   std::coroutine_handle<> 364   std::coroutine_handle<>
HITCBC 365   3216 thread_pool::executor_type:: 365   3203 thread_pool::executor_type::
366   dispatch(continuation& c) const 366   dispatch(continuation& c) const
367   { 367   {
HITCBC 368   3216 if(pool_->impl_->running_in_this_thread()) 368   3203 if(pool_->impl_->running_in_this_thread())
HITCBC 369   7 return c.h; 369   7 return c.h;
HITCBC 370   3209 pool_->impl_->post(c); 370   3196 pool_->impl_->post(c);
HITCBC 371   3209 return std::noop_coroutine(); 371   3196 return std::noop_coroutine();
372   } 372   }
373   373  
374   } // capy 374   } // capy
375   } // boost 375   } // boost