comparison osx/include/kj/thread.h @ 49:3ab5a40c4e3b

Add Capnp and KJ builds for OSX

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