For #2188: Support thread-safe queue SrsThreadQueue.

1. Wrap std::vector to thread-safe queue.
2. Keep API compatible with std::vector.
3. SrsAsyncFileWriter use thread-safe queue instead.

trunk/src/app/srs_app_threads.cpp

@@ -170,7 +170,7 @@ srs_error_t SrsThreadPool::run()
     srs_error_t err = srs_success;
 
     while (true) {
-        string async_logs = _srs_async_log->desc();
+        string async_logs = _srs_async_log->description();
         srs_trace("Thread #%d(%s): cycle threads=%d%s", entry_->num, entry_->label.c_str(), (int)threads_.size(),
             async_logs.c_str());
 
@@ -205,21 +205,16 @@ SrsThreadPool* _srs_thread_pool = new SrsThreadPool();
 SrsAsyncFileWriter::SrsAsyncFileWriter(std::string p)
 {
     filename_ = p;
-    lock_ = new SrsThreadMutex();
     writer_ = new SrsFileWriter();
+    queue_ = new SrsThreadQueue<SrsSharedPtrMessage>();
 }
 
 // TODO: FIXME: Before free the writer, we must remove it from the manager.
 SrsAsyncFileWriter::~SrsAsyncFileWriter()
 {
+    // TODO: FIXME: Should we flush dirty logs?
     srs_freep(writer_);
-    srs_freep(lock_);
-
-    // TODO: FIXME: Should we flush these logs?
-    for (int i = 0; i < (int)dirty_.size(); i++) {
-        SrsSharedPtrMessage* msg = dirty_.at(i);
-        srs_freep(msg);
-    }
+    srs_freep(queue_);
 }
 
 srs_error_t SrsAsyncFileWriter::open()
@@ -251,10 +246,7 @@ srs_error_t SrsAsyncFileWriter::write(void* buf, size_t count, ssize_t* pnwrite)
     SrsSharedPtrMessage* msg = new SrsSharedPtrMessage();
     msg->wrap(cp, count);
 
-    if (true) {
-        SrsThreadLocker(lock_);
-        dirty_.push_back(msg);
-    }
+    queue_->push_back(msg);
 
     if (pnwrite) {
         *pnwrite = count;
@@ -288,10 +280,7 @@ srs_error_t SrsAsyncFileWriter::flush()
     srs_error_t err = srs_success;
 
     vector<SrsSharedPtrMessage*> flying;
-    if (true) {
-        SrsThreadLocker(lock_);
-        dirty_.swap(flying);
-    }
+    queue_->swap(flying);
 
     for (int i = 0; i < (int)flying.size(); i++) {
         SrsSharedPtrMessage* msg = flying.at(i);
@@ -366,7 +355,7 @@ void SrsAsyncLogManager::reopen()
     reopen_ = true;
 }
 
-std::string SrsAsyncLogManager::desc()
+std::string SrsAsyncLogManager::description()
 {
     SrsThreadLocker(lock_);
 
@@ -375,8 +364,9 @@ std::string SrsAsyncLogManager::desc()
     for (int i = 0; i < (int)writers_.size(); i++) {
         SrsAsyncFileWriter* writer = writers_.at(i);
 
-        nn_logs += (int)writer->dirty_.size();
-        max_logs = srs_max(max_logs, (int)writer->dirty_.size());
+        int nn = (int)writer->queue_->size();
+        nn_logs += nn;
+        max_logs = srs_max(max_logs, nn);
     }
 
     static char buf[128];

trunk/src/app/srs_app_threads.hpp

@@ -116,15 +116,52 @@ class SrsThreadPool
 // The global thread pool.
 extern SrsThreadPool* _srs_thread_pool;
 
+// Thread-safe queue.
+template<typename T>
+class SrsThreadQueue
+{
+private:
+    std::vector<T*> dirty_;
+    SrsThreadMutex* lock_;
+public:
+    // SrsThreadQueue::SrsThreadQueue
+    SrsThreadQueue() {
+        lock_ = new SrsThreadMutex();
+    }
+    // SrsThreadQueue::~SrsThreadQueue
+    virtual ~SrsThreadQueue() {
+        srs_freep(lock_);
+        for (int i = 0; i < (int)dirty_.size(); i++) {
+            T* msg = dirty_.at(i);
+            srs_freep(msg);
+        }
+    }
+public:
+    // SrsThreadQueue::push_back
+    void push_back(T* msg) {
+        SrsThreadLocker(lock_);
+        dirty_.push_back(msg);
+    }
+    // SrsThreadQueue::swap
+    void swap(std::vector<T*>& flying) {
+        SrsThreadLocker(lock_);
+        dirty_.swap(flying);
+    }
+    // SrsThreadQueue::size
+    size_t size() {
+        SrsThreadLocker(lock_);
+        return dirty_.size();
+    }
+};
+
 // Async file writer.
 class SrsAsyncFileWriter : public ISrsWriter
 {
     friend class SrsAsyncLogManager;
 private:
     std::string filename_;
     SrsFileWriter* writer_;
-    std::vector<SrsSharedPtrMessage*> dirty_;
-    SrsThreadMutex* lock_;
+    SrsThreadQueue<SrsSharedPtrMessage>* queue_;
 private:
     SrsAsyncFileWriter(std::string p);
     virtual ~SrsAsyncFileWriter();
@@ -168,7 +205,8 @@ class SrsAsyncLogManager
     // Reopen all log files, asynchronously.
     virtual void reopen();
 public:
-    std::string desc();
+    // Get the summary of this manager.
+    std::string description();
 private:
     static srs_error_t start(void* arg);
     srs_error_t do_start();