for bug #200, deadloop when read/write 0 and ETIME. 2.0.16.

@@ -242,9 +242,10 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 * 2013-10-17, Created.<br/>
 
 
 ## History
 ## History
-* v2.0, 2014-11-08, fix [#194](https://github.com/winlinvip/simple-rtmp-server/issues/194), writev multiple msgs, support 6k+ 250kbps clients. 2.0.15.
-* v2.0, 2014-11-08, fix [#194](https://github.com/winlinvip/simple-rtmp-server/issues/194), optmized st for timeout recv. pulse to 500ms. 2.0.14.
-* v2.0, 2014-11-08, fix [#195](https://github.com/winlinvip/simple-rtmp-server/issues/195), remove the confuse code st_usleep(0). 2.0.13.
+* v2.0, 2014-11-13, fix [#200](https://github.com/winlinvip/simple-rtmp-server/issues/200), deadloop when read/write 0 and ETIME. 2.0.16.
+* v2.0, 2014-11-13, fix [#194](https://github.com/winlinvip/simple-rtmp-server/issues/194), writev multiple msgs, support 6k+ 250kbps clients. 2.0.15.
+* v2.0, 2014-11-12, fix [#194](https://github.com/winlinvip/simple-rtmp-server/issues/194), optmized st for timeout recv. pulse to 500ms. 2.0.14.
+* v2.0, 2014-11-11, fix [#195](https://github.com/winlinvip/simple-rtmp-server/issues/195), remove the confuse code st_usleep(0). 2.0.13.
 * v2.0, 2014-11-08, fix [#191](https://github.com/winlinvip/simple-rtmp-server/issues/191), configure --export-librtmp-project and --export-librtmp-single. 2.0.11.
 * v2.0, 2014-11-08, fix [#191](https://github.com/winlinvip/simple-rtmp-server/issues/191), configure --export-librtmp-project and --export-librtmp-single. 2.0.11.
 * v2.0, 2014-11-08, fix [#66](https://github.com/winlinvip/simple-rtmp-server/issues/66), srs-librtmp support write h264 raw packet. 2.0.9.
 * v2.0, 2014-11-08, fix [#66](https://github.com/winlinvip/simple-rtmp-server/issues/66), srs-librtmp support write h264 raw packet. 2.0.9.
 * v2.0, 2014-10-25, fix [#185](https://github.com/winlinvip/simple-rtmp-server/issues/185), AMF0 support 0x0B the date type codec. 2.0.7.
 * v2.0, 2014-10-25, fix [#185](https://github.com/winlinvip/simple-rtmp-server/issues/185), AMF0 support 0x0B the date type codec. 2.0.7.

@@ -101,7 +101,7 @@ int sleep2_test()
     st_thread_join(trd1, NULL);
     st_thread_join(trd1, NULL);
 
 
     srs_trace("sleep test: end");
     srs_trace("sleep test: end");
-    exit(0);
+    
     return 0;
     return 0;
 }
 }
 
 
@@ -431,6 +431,8 @@ int pipe_test()
 
 
 int main(int argc, char** argv)
 int main(int argc, char** argv)
 {
 {
+    srs_trace("ETIME=%d", ETIME);
+    
     if (st_set_eventsys(ST_EVENTSYS_ALT) < 0) {
     if (st_set_eventsys(ST_EVENTSYS_ALT) < 0) {
         srs_trace("st_set_eventsys failed");
         srs_trace("st_set_eventsys failed");
         return -1;
         return -1;

@@ -534,10 +534,6 @@ int SrsRtmpConn::playing(SrsSource* source)
                 // it's ok, do nothing.
                 // it's ok, do nothing.
                 ret = ERROR_SUCCESS;
                 ret = ERROR_SUCCESS;
                 srs_verbose("recv timeout, ignore. ret=%d", ret);
                 srs_verbose("recv timeout, ignore. ret=%d", ret);
-                
-                // TODO: FIXME: the timeout may caused some dead loop.
-                // @see: https://github.com/winlinvip/simple-rtmp-server/issues/161
-                st_usleep(0);
             } else if (ret != ERROR_SUCCESS) {
             } else if (ret != ERROR_SUCCESS) {
                 if (!srs_is_client_gracefully_close(ret)) {
                 if (!srs_is_client_gracefully_close(ret)) {
                     srs_error("recv client control message failed. ret=%d", ret);
                     srs_error("recv client control message failed. ret=%d", ret);

@@ -82,8 +82,9 @@ int SrsStSocket::read(void* buf, size_t size, ssize_t* nread)
     
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value of 0 means the network connection is closed or end of file is reached).
     // (a value of 0 means the network connection is closed or end of file is reached).
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error. 
     if (nb_read <= 0) {
     if (nb_read <= 0) {
-        if (errno == ETIME) {
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         
@@ -110,8 +111,9 @@ int SrsStSocket::read_fully(void* buf, size_t size, ssize_t* nread)
     
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value less than nbyte means the network connection is closed or end of file is reached)
     // (a value less than nbyte means the network connection is closed or end of file is reached)
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error. 
     if (nb_read != (ssize_t)size) {
     if (nb_read != (ssize_t)size) {
-        if (errno == ETIME) {
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         
@@ -136,8 +138,10 @@ int SrsStSocket::write(void* buf, size_t size, ssize_t* nwrite)
         *nwrite = nb_write;
         *nwrite = nb_write;
     }
     }
     
     
+    // On success a non-negative integer equal to nbyte is returned. 
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error.
     if (nb_write <= 0) {
     if (nb_write <= 0) {
-        if (errno == ETIME) {
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         
@@ -158,8 +162,10 @@ int SrsStSocket::writev(const iovec *iov, int iov_size, ssize_t* nwrite)
         *nwrite = nb_write;
         *nwrite = nb_write;
     }
     }
     
     
+    // On success a non-negative integer equal to nbyte is returned. 
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error.
     if (nb_write <= 0) {
     if (nb_write <= 0) {
-        if (errno == ETIME) {
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
 #define VERSION_MINOR       0
-#define VERSION_REVISION    15
+#define VERSION_REVISION    16
 // server info.
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"

@@ -82,23 +82,27 @@ int SimpleSocketStream::read(void* buf, size_t size, ssize_t* nread)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    *nread = ::recv(fd, buf, size, 0);
+    ssize_t nb_read = ::recv(fd, buf, size, 0);
+    
+    if (nread) {
+        *nread = nb_read;
+    }
     
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value of 0 means the network connection is closed or end of file is reached).
     // (a value of 0 means the network connection is closed or end of file is reached).
-    if (*nread <= 0) {
-        if (errno == ETIME) {
+    if (nb_read <= 0) {
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         
-        if (*nread == 0) {
+        if (nb_read == 0) {
             errno = ECONNRESET;
             errno = ECONNRESET;
         }
         }
         
         
         return ERROR_SOCKET_READ;
         return ERROR_SOCKET_READ;
     }
     }
     
     
-    recv_bytes += *nread;
+    recv_bytes += nb_read;
     
     
     return ret;
     return ret;
 }
 }
@@ -165,21 +169,24 @@ int SimpleSocketStream::read_fully(void* buf, size_t size, ssize_t* nread)
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
     size_t left = size;
     size_t left = size;
-    *nread = 0;
+    ssize_t nb_read = 0;
     
     
     while (left > 0) {
     while (left > 0) {
-        char* this_buf = (char*)buf + *nread;
+        char* this_buf = (char*)buf + nb_read;
         ssize_t this_nread;
         ssize_t this_nread;
         
         
         if ((ret = this->read(this_buf, left, &this_nread)) != ERROR_SUCCESS) {
         if ((ret = this->read(this_buf, left, &this_nread)) != ERROR_SUCCESS) {
             return ret;
             return ret;
         }
         }
         
         
-        *nread += this_nread;
+        nb_read += this_nread;
         left -= this_nread;
         left -= this_nread;
     }
     }
     
     
-    recv_bytes += *nread;
+    if (nread) {
+        *nread = nb_read;
+    }
+    recv_bytes += nb_read;
     
     
     return ret;
     return ret;
 }
 }
@@ -188,17 +195,21 @@ int SimpleSocketStream::write(void* buf, size_t size, ssize_t* nwrite)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    *nwrite = ::send(fd, (void*)buf, size, 0);
+    ssize_t nb_write = ::send(fd, (void*)buf, size, 0);
     
     
-    if (*nwrite <= 0) {
-        if (errno == ETIME) {
+    if (nwrite) {
+        *nwrite = nb_write;
+    }
+    
+    if (nb_write <= 0) {
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
             return ERROR_SOCKET_TIMEOUT;
         }
         }
         
         
         return ERROR_SOCKET_WRITE;
         return ERROR_SOCKET_WRITE;
     }
     }
     
     
-    send_bytes += *nwrite;
+    send_bytes += nb_write;
     
     
     return ret;
     return ret;
 }
 }