accelerate QWindowsPipeWriter for bigger chunks of data

Don't put pipes into message mode.
This makes it possible to not split data into 2k chunks.

Reviewed-by: ossi

2 files changed, 4 insertions, 6 deletions

diff --git a/src/corelib/io/qwindowspipewriter.cpp b/src/corelib/io/qwindowspipewriter.cpp
index 417439f..2fe4424 100644
--- a/src/corelib/io/qwindowspipewriter.cpp
+++ b/src/corelib/io/qwindowspipewriter.cpp
@@ -128,11 +128,9 @@ void QWindowsPipeWriter::run()
         overl.OffsetHigh = 0;
         while ((!quitNow) && totalWritten < maxlen) {
             DWORD written = 0;
-            // Write 2k at a time to prevent flooding the pipe. If you
-            // write too much (4k-8k), the pipe can close
-            // unexpectedly.
             if (!WriteFile(writePipe, ptrData + totalWritten,
-                    qMin<int>(2048, maxlen - totalWritten), &written, &overl)) {
+                           maxlen - totalWritten, &written, &overl)) {
+
                 if (GetLastError() == 0xE8/*NT_STATUS_INVALID_USER_BUFFER*/) {
                     // give the os a rest
                     msleep(100);
diff --git a/src/network/socket/qlocalserver_win.cpp b/src/network/socket/qlocalserver_win.cpp
index e820f73..5d2be72 100644
--- a/src/network/socket/qlocalserver_win.cpp
+++ b/src/network/socket/qlocalserver_win.cpp
@@ -65,8 +65,8 @@ bool QLocalServerPrivate::addListener()
     listener.handle = CreateNamedPipe(
                  (const wchar_t *)fullServerName.utf16(), // pipe name
                  PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,       // read/write access
-                 PIPE_TYPE_MESSAGE |       // message type pipe
-                 PIPE_READMODE_MESSAGE |   // message-read mode
+                 PIPE_TYPE_BYTE |          // byte type pipe
+                 PIPE_READMODE_BYTE |      // byte-read mode
                  PIPE_WAIT,                // blocking mode
                  PIPE_UNLIMITED_INSTANCES, // max. instances
                  BUFSIZE,                  // output buffer size