for bug #194, add fds poll, just sleep to send without recv.

@@ -24,14 +24,17 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_poll.hpp>
 
 #include <srs_kernel_error.hpp>
+#include <srs_kernel_log.hpp>
 
 SrsPoll::SrsPoll()
 {
+    _pds = NULL;
     pthread = new SrsThread(this, 0, false);
 }
 
 SrsPoll::~SrsPoll()
 {
+    srs_freep(_pds);
     srs_freep(pthread);
     fds.clear();
 }
@@ -44,10 +47,84 @@ int SrsPoll::start()
 int SrsPoll::cycle()
 {
     int ret = ERROR_SUCCESS;
-    // TODO: FIXME: implements it.
+    
+    if (fds.size() == 0) {
+        st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+        return ret;
+    }
+    
+    int nb_pds = (int)fds.size();
+
+st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+return ret;
+    
+    srs_freep(_pds);
+    _pds = new pollfd[nb_pds];
+    
+    if (true) {
+        int index = 0;
+
+        std::map<int, SrsPollFD*>::iterator it;
+        for (it = fds.begin(); it != fds.end(); ++it) {
+            int fd = it->first;
+            
+            pollfd& pfd = _pds[index++];
+            pfd.fd = fd;
+            pfd.events = POLLIN;
+            pfd.revents = 0;
+        }
+        
+        srs_assert(index == (int)fds.size());
+    }
+
+    if (st_poll(_pds, nb_pds, ST_UTIME_NO_TIMEOUT) <= 0) {
+        srs_warn("ignore st_poll failed, size=%d", nb_pds);
+        return ret;
+    }
+    
+    for (int i = 0; i < nb_pds; i++) {
+        if (!(_pds[i].revents & POLLIN)) {
+            continue;
+        }
+        
+        int fd = _pds[i].fd;
+        if (fds.find(fd) == fds.end()) {
+            continue;
+        }
+        
+        SrsPollFD* owner = fds[fd];
+        owner->set_active(true);
+    }
+    
+    return ret;
+}
+
+int SrsPoll::add(st_netfd_t stfd, SrsPollFD* owner)
+{
+    int ret = ERROR_SUCCESS;
+    
+    int fd = st_netfd_fileno(stfd);
+    if (fds.find(fd) != fds.end()) {
+        ret = ERROR_RTMP_POLL_FD_DUPLICATED;
+        srs_error("fd exists, fd=%d, ret=%d", fd, ret);
+        return ret;
+    }
+    
+    fds[fd] = owner;
+    
     return ret;
 }
 
+void SrsPoll::remove(st_netfd_t stfd, SrsPollFD* owner)
+{
+    std::map<int, SrsPollFD*>::iterator it;
+    
+    int fd = st_netfd_fileno(stfd);
+    if ((it = fds.find(fd)) != fds.end()) {
+        fds.erase(it);
+    }
+}
+
 SrsPoll* SrsPoll::_instance = new SrsPoll();
 
 SrsPoll* SrsPoll::instance()
@@ -58,10 +135,15 @@ SrsPoll* SrsPoll::instance()
 SrsPollFD::SrsPollFD()
 {
     _stfd = NULL;
+    _active = false;
 }
 
 SrsPollFD::~SrsPollFD()
 {
+    if (_stfd) {
+        SrsPoll* poll = SrsPoll::instance();
+        poll->remove(_stfd, this);
+    }
 }
 
 int SrsPollFD::initialize(st_netfd_t stfd)
@@ -70,6 +152,22 @@ int SrsPollFD::initialize(st_netfd_t stfd)
     
     _stfd = stfd;
     
+    SrsPoll* poll = SrsPoll::instance();
+    if ((ret = poll->add(stfd, this)) != ERROR_SUCCESS) {
+        srs_error("add fd to poll failed. ret=%d", ret);
+        return ret;
+    }
+    
     return ret;
 }
 
+bool SrsPollFD::active()
+{
+    return _active;
+}
+
+void SrsPollFD::set_active(bool v)
+{
+    _active = v;
+}
+

@@ -46,7 +46,8 @@ class SrsPoll : public ISrsThreadHandler
 {
 private:
     SrsThread* pthread;
-    std::map<st_netfd_t, SrsPollFD*> fds;
+    pollfd* _pds;
+    std::map<int, SrsPollFD*> fds;
 public:
     SrsPoll();
     virtual ~SrsPoll();
@@ -59,6 +60,15 @@ public:
     * start an cycle thread.
     */
     virtual int cycle();
+public:
+    /**
+    * add the fd to poll.
+    */
+    virtual int add(st_netfd_t stfd, SrsPollFD* owner);
+    /**
+    * remove the fd to poll, ignore any error.
+    */
+    virtual void remove(st_netfd_t stfd, SrsPollFD* owner);
 // singleton
 private:
     static SrsPoll* _instance;
@@ -73,6 +83,8 @@ class SrsPollFD
 {
 private:
     st_netfd_t _stfd;
+    // whether current fd is active.
+    bool _active;
 public:
     SrsPollFD();
     virtual ~SrsPollFD();
@@ -82,6 +94,15 @@ public:
     * @param stfd the fd to poll.
     */
     virtual int initialize(st_netfd_t stfd);
+    /**
+    * whether fd is active.
+    */
+    virtual bool active();
+    /**
+    * the poll will set to fd active when got data to read,
+    * the connection will set to deactive when data read.
+    */
+    virtual void set_active(bool v);
 };
 
 #endif

@@ -517,26 +517,31 @@ int SrsRtmpConn::playing(SrsSource* source)
     SrsAutoFree(SrsConsumer, consumer);
     srs_verbose("consumer created success.");
     
-    rtmp->set_recv_timeout(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+    // use poll fd to manage the connection, read when active.
+    SrsPollFD poll_fd;
+    if ((ret = poll_fd.initialize(stfd)) != ERROR_SUCCESS) {
+        return ret;
+    }
     
-    SrsPithyPrint pithy_print(SRS_CONSTS_STAGE_PLAY_USER);
+    // TODO: FIXME: remove following.
+    //rtmp->set_recv_timeout(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+    rtmp->set_recv_timeout(ST_UTIME_NO_TIMEOUT);
+    rtmp->set_send_timeout(ST_UTIME_NO_TIMEOUT);
     
+    // initialize other components
+    SrsPithyPrint pithy_print(SRS_CONSTS_STAGE_PLAY_USER);
     SrsSharedPtrMessageArray msgs(SYS_MAX_PLAY_SEND_MSGS);
-
     bool user_specified_duration_to_stop = (req->duration > 0);
     int64_t starttime = -1;
     
-    SrsPollFD poll;
-    if ((ret = poll.initialize(stfd)) != ERROR_SUCCESS) {
-        return ret;
-    }
-    
     while (true) {
         // collect elapse for pithy print.
         pithy_print.elapse();
 
         // read from client.
-        if (true) {
+        if (poll_fd.active()) {
+            poll_fd.set_active(false);
+            
             SrsMessage* msg = NULL;
             ret = rtmp->recv_message(&msg);
             srs_verbose("play loop recv message. ret=%d", ret);
@@ -565,6 +570,13 @@ int SrsRtmpConn::playing(SrsSource* source)
             srs_error("get messages from consumer failed. ret=%d", ret);
             return ret;
         }
+        
+        // no data, sleep a while.
+        // for the poll_fd maybe not active, and no message.
+        // @see: https://github.com/winlinvip/simple-rtmp-server/issues/194
+        if (count <= 0) {
+            st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+        }
 
         // reportable
         if (pithy_print.can_print()) {

@@ -185,6 +185,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_EDGE_VHOST_REMOVED            3039
 #define ERROR_HLS_AVC_TRY_OTHERS            3040
 #define ERROR_H264_API_NO_PREFIXED          3041
+#define ERROR_RTMP_POLL_FD_DUPLICATED       3042
 
 /**
 * whether the error code is an system control error.