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-rw-r--r--src/threading/CMakeLists.txt1
-rw-r--r--src/threading/event.cpp95
-rw-r--r--src/threading/event.h38
3 files changed, 121 insertions, 13 deletions
diff --git a/src/threading/CMakeLists.txt b/src/threading/CMakeLists.txt
index f3d0efc18..5dd60ef1a 100644
--- a/src/threading/CMakeLists.txt
+++ b/src/threading/CMakeLists.txt
@@ -1,4 +1,5 @@
set(JTHREAD_SRCS
+ ${CMAKE_CURRENT_SOURCE_DIR}/event.cpp
${CMAKE_CURRENT_SOURCE_DIR}/mutex.cpp
${CMAKE_CURRENT_SOURCE_DIR}/thread.cpp
${CMAKE_CURRENT_SOURCE_DIR}/semaphore.cpp
diff --git a/src/threading/event.cpp b/src/threading/event.cpp
new file mode 100644
index 000000000..1c458bf1d
--- /dev/null
+++ b/src/threading/event.cpp
@@ -0,0 +1,95 @@
+/*
+This file is a part of the JThread package, which contains some object-
+oriented thread wrappers for different thread implementations.
+
+Copyright (c) 2000-2006 Jori Liesenborgs (jori.liesenborgs@gmail.com)
+
+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.
+*/
+
+#include "threading/event.h"
+
+#if defined(_WIN32)
+ #ifndef WIN32_LEAN_AND_MEAN
+ #define WIN32_LEAN_AND_MEAN
+ #endif
+ #include <windows.h>
+#endif
+
+
+#if __cplusplus < 201103L
+Event::Event()
+{
+#ifdef _WIN32
+ event = CreateEvent(NULL, false, false, NULL);
+#else
+ pthread_cond_init(&cv, NULL);
+ pthread_mutex_init(&mutex, NULL);
+#endif
+}
+
+Event::~Event()
+{
+#ifdef _WIN32
+ CloseHandle(event);
+#else
+ pthread_cond_destroy(&cv);
+ pthread_mutex_destroy(&mutex);
+#endif
+}
+#endif
+
+
+void Event::wait()
+{
+#if __cplusplus >= 201103L
+ MutexAutoLock lock(mutex);
+ while (!notified) {
+ cv.wait(lock);
+ }
+ notified = false;
+#elif defined(_WIN32)
+ WaitForSingleObject(event, INFINITE);
+#else
+ pthread_mutex_lock(&mutex);
+ while (!notified) {
+ pthread_cond_wait(&cv, &mutex);
+ }
+ notified = false;
+ pthread_mutex_unlock(&mutex);
+#endif
+}
+
+
+void Event::signal()
+{
+#if __cplusplus >= 201103L
+ MutexAutoLock lock(mutex);
+ notified = true;
+ cv.notify_one();
+#elif defined(_WIN32)
+ SetEvent(event);
+#else
+ pthread_mutex_lock(&mutex);
+ notified = true;
+ pthread_cond_signal(&cv);
+ pthread_mutex_unlock(&mutex);
+#endif
+}
+
diff --git a/src/threading/event.h b/src/threading/event.h
index 0105630e5..ea087e53f 100644
--- a/src/threading/event.h
+++ b/src/threading/event.h
@@ -26,30 +26,42 @@ DEALINGS IN THE SOFTWARE.
#ifndef THREADING_EVENT_H
#define THREADING_EVENT_H
-#ifdef _WIN32
- #include <windows.h>
+#if __cplusplus >= 201103L
+ #include <condition_variable>
+ #include "threading/mutex.h"
+#elif defined(_WIN32)
+ #include <windef.h>
#else
- #include "threading/semaphore.h"
+ #include <pthread.h>
#endif
+/** A syncronization primitive that will wake up one waiting thread when signaled.
+ * Calling @c signal() multiple times before a waiting thread has had a chance
+ * to notice the signal will wake only one thread. Additionally, if no threads
+ * are waiting on the event when it is signaled, the next call to @c wait()
+ * will return (almost) immediately.
+ */
class Event {
public:
-#ifdef _WIN32
- Event() { event = CreateEvent(NULL, false, false, NULL); }
- ~Event() { CloseHandle(event); }
- void wait() { WaitForSingleObject(event, INFINITE); }
- void signal() { SetEvent(event); }
-#else
- void wait() { sem.wait(); }
- void signal() { sem.post(); }
+#if __cplusplus < 201103L
+ Event();
+ ~Event();
#endif
+ void wait();
+ void signal();
private:
-#ifdef _WIN32
+#if __cplusplus >= 201103L
+ std::condition_variable cv;
+ Mutex mutex;
+ bool notified;
+#elif defined(_WIN32)
HANDLE event;
#else
- Semaphore sem;
+ pthread_cond_t cv;
+ pthread_mutex_t mutex;
+ bool notified;
#endif
};