Chris@47: // Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
Chris@47: // Licensed under the MIT License:
Chris@47: //
Chris@47: // Permission is hereby granted, free of charge, to any person obtaining a copy
Chris@47: // of this software and associated documentation files (the "Software"), to deal
Chris@47: // in the Software without restriction, including without limitation the rights
Chris@47: // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Chris@47: // copies of the Software, and to permit persons to whom the Software is
Chris@47: // furnished to do so, subject to the following conditions:
Chris@47: //
Chris@47: // The above copyright notice and this permission notice shall be included in
Chris@47: // all copies or substantial portions of the Software.
Chris@47: //
Chris@47: // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Chris@47: // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Chris@47: // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Chris@47: // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Chris@47: // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Chris@47: // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Chris@47: // THE SOFTWARE.
Chris@47: 
Chris@47: #ifndef KJ_THREAD_H_
Chris@47: #define KJ_THREAD_H_
Chris@47: 
Chris@47: #if defined(__GNUC__) && !KJ_HEADER_WARNINGS
Chris@47: #pragma GCC system_header
Chris@47: #endif
Chris@47: 
Chris@47: #include "common.h"
Chris@47: #include "function.h"
Chris@47: #include "exception.h"
Chris@47: 
Chris@47: namespace kj {
Chris@47: 
Chris@47: class Thread {
Chris@47:   // A thread!  Pass a lambda to the constructor, and it runs in the thread.  The destructor joins
Chris@47:   // the thread.  If the function throws an exception, it is rethrown from the thread's destructor
Chris@47:   // (if not unwinding from another exception).
Chris@47: 
Chris@47: public:
Chris@47:   explicit Thread(Function<void()> func);
Chris@47:   KJ_DISALLOW_COPY(Thread);
Chris@47: 
Chris@47:   ~Thread() noexcept(false);
Chris@47: 
Chris@47: #if !_WIN32
Chris@47:   void sendSignal(int signo);
Chris@47:   // Send a Unix signal to the given thread, using pthread_kill or an equivalent.
Chris@47: #endif
Chris@47: 
Chris@47:   void detach();
Chris@47:   // Don't join the thread in ~Thread().
Chris@47:   //
Chris@47:   // TODO(soon): Currently broken: the thread uses the Thread objects during its execution; instead
Chris@47:   //   the Thread object and the thread itself will need to share a refcounted object.
Chris@47: 
Chris@47: private:
Chris@47:   struct ThreadState {
Chris@47:     Function<void()> func;
Chris@47:     kj::Maybe<kj::Exception> exception;
Chris@47: 
Chris@47:     unsigned int refcount;
Chris@47:     // Owned by the parent thread and the child thread.
Chris@47: 
Chris@47:     void unref();
Chris@47:   };
Chris@47:   ThreadState* state;
Chris@47: 
Chris@47: #if _WIN32
Chris@47:   void* threadHandle;
Chris@47: #else
Chris@47:   unsigned long long threadId;  // actually pthread_t
Chris@47: #endif
Chris@47:   bool detached = false;
Chris@47: 
Chris@47: #if _WIN32
Chris@47:   static unsigned long __stdcall runThread(void* ptr);
Chris@47: #else
Chris@47:   static void* runThread(void* ptr);
Chris@47: #endif
Chris@47: };
Chris@47: 
Chris@47: }  // namespace kj
Chris@47: 
Chris@47: #endif  // KJ_THREAD_H_