receiving side of signaler virtualised

src/app_thread.cpp

@@ -84,7 +84,7 @@ bool zmq::app_thread_t::make_current ()
 
 void zmq::app_thread_t::process_commands (bool block_, bool throttle_)
 {
-    ypollset_t::signals_t signals;
+    uint64_t signals;
     if (block_)
         signals = pollset.poll ();
     else {
@@ -127,7 +127,7 @@ void zmq::app_thread_t::process_commands (bool block_, bool throttle_)
         //  Traverse all the possible sources of commands and process
         //  all the commands from all of them.
         for (int i = 0; i != thread_slot_count (); i++) {
-            if (signals & (ypollset_t::signals_t (1) << i)) {
+            if (signals & (uint64_t (1) << i)) {
                 command_t cmd;
                 while (dispatcher->read (i, get_thread_slot (), &cmd))
                     cmd.destination->process_command (cmd);

src/fd_signaler.cpp

@@ -59,16 +59,16 @@ zmq::fd_signaler_t::~fd_signaler_t ()
 void zmq::fd_signaler_t::signal (int signal_)
 {
     zmq_assert (signal_ >= 0 && signal_ < 64);
-    signals_t inc = 1;
+    uint64_t inc = 1;
     inc <<= signal_;
-    ssize_t sz = write (fd, &inc, sizeof (signals_t));
+    ssize_t sz = write (fd, &inc, sizeof (uint64_t));
-    errno_assert (sz == sizeof (signals_t));
+    errno_assert (sz == sizeof (uint64_t));
 }
 
-zmq::fd_signaler_t::signals_t zmq::fd_signaler_t::check ()
+uint64_t zmq::fd_signaler_t::check ()
 {
-    signals_t val;
+    uint64_t val;
-    ssize_t sz = read (fd, &val, sizeof (signals_t));
+    ssize_t sz = read (fd, &val, sizeof (uint64_t));
     if (sz == -1 && (errno == EAGAIN || errno == EWOULDBLOCK ||
           errno == EINTR))
         return 0;
@@ -148,16 +148,30 @@ void zmq::fd_signaler_t::signal (int signal_)
     win_assert (rc != SOCKET_ERROR);
 }
 
-zmq::fd_signaler_t::signals_t zmq::fd_signaler_t::check ()
+uint64_t zmq::fd_signaler_t::poll ()
 {
-    char buffer [32];      
+    //  If there are signals available, return straight away.
+    uint64_t signals = check ();
+    if (signals)
+        return signals;
+
+    //  If there are no signals, wait until at least one signal arrives.
+    unsigned char sig;
+    int nbytes = recv (r, &sig, 1, MSG_WAITALL);
+    win_assert (nbytes != -1);
+    return uint64_t (1) << sig;
+}
+
+uint64_t zmq::fd_signaler_t::check ()
+{
+    unsigned char buffer [32];      
     int nbytes = recv (r, buffer, 32, 0);
     win_assert (nbytes != -1);
 
-    signals_t signals = 0;
+    uint64_t signals = 0;
     for (int pos = 0; pos != nbytes; pos++) {
         zmq_assert (buffer [pos] < 64);
-        signals |= (signals_t (1) << (buffer [pos]));
+        signals |= (uint64_t (1) << (buffer [pos]));
     }
     return signals;
 }
@@ -202,15 +216,30 @@ void zmq::fd_signaler_t::signal (int signal_)
     errno_assert (nbytes == 1);
 }
 
-zmq::fd_signaler_t::signals_t zmq::fd_signaler_t::check ()
+uint64_t zmq::fd_signaler_t::poll ()
+{
+    //  If there are signals available, return straight away.
+    uint64_t signals = check ();
+    if (signals)
+        return signals;
+
+    //  If there are no signals, wait until at least one signal arrives.
+    unsigned char sig;
+    ssize_t nbytes = recv (r, &sig, 1, MSG_WAITALL);
+    errno_assert (nbytes != -1);
+    return uint64_t (1) << sig;
+}
+
+uint64_t zmq::fd_signaler_t::check ()
 {
     unsigned char buffer [32];
     ssize_t nbytes = recv (r, buffer, 32, 0);
     errno_assert (nbytes != -1);
-    signals_t signals = 0;
+
+    uint64_t signals = 0;
     for (int pos = 0; pos != nbytes; pos ++) {
         zmq_assert (buffer [pos] < 64);
-        signals |= (1 << (buffer [pos]));
+        signals |= (uint64_t (1) << (buffer [pos]));
     }
     return signals;
 }

src/fd_signaler.hpp

@@ -37,22 +37,16 @@ namespace zmq
     {
     public:
 
-        typedef uint64_t signals_t;
-
         //  Initialise the object.
         fd_signaler_t ();
 
         //  Destroy the object.
         ~fd_signaler_t ();
 
-        //  Send specific signal.
+        //  i_signaler interface implementation.
         void signal (int signal_);
-
+        uint64_t poll ();
-        //  Retrieves signals. Returns a set of signals in form of a bitmap.
+        uint64_t check ();
-        //  Signal with index 0 corresponds to value 1, index 1 to value 2,
-        //  index 2 to value 4 etc. If there is no signal available,
-        //  it returns zero immediately.
-        signals_t check ();
 
         //  Get the file descriptor associated with the object.
         fd_t get_fd ();

src/i_signaler.hpp

@@ -20,6 +20,8 @@
 #ifndef __ZMQ_I_SIGNALER_HPP_INCLUDED__
 #define __ZMQ_I_SIGNALER_HPP_INCLUDED__
 
+#include "stdint.hpp"
+
 namespace zmq
 {
     //  Virtual interface used to send signals. Individual implementations
@@ -31,6 +33,15 @@ namespace zmq
 
         //  Send a signal with a specific ID.
         virtual void signal (int signal_) = 0;
+
+        //  Wait for signal. Returns a set of signals in form of a bitmap.
+        //  Signal with index 0 corresponds to value 1, index 1 to value 2,
+        //  index 2 to value 3 etc.
+        uint64_t poll ();
+
+        //  Same as poll, however, if there is no signal available,
+        //  function returns zero immediately instead of waiting for a signal.
+        uint64_t check ();
     };
 
 }

src/io_thread.cpp

@@ -104,7 +104,7 @@ int zmq::io_thread_t::get_load ()
 void zmq::io_thread_t::in_event ()
 {
     //  Find out which threads are sending us commands.
-    fd_signaler_t::signals_t signals = signaler.check ();
+    uint64_t signals = signaler.check ();
     zmq_assert (signals);
 
     //  Iterate through all the threads in the process and find out
@@ -112,7 +112,7 @@ void zmq::io_thread_t::in_event ()
     int slot_count = thread_slot_count ();
     for (int source_thread_slot = 0;
           source_thread_slot != slot_count; source_thread_slot++) {
-        if (signals & (fd_signaler_t::signals_t (1) << source_thread_slot)) {
+        if (signals & (uint64_t (1) << source_thread_slot)) {
 
             //  Read all the commands from particular thread.
             command_t cmd;

src/ypollset.cpp

@@ -30,7 +30,7 @@ void zmq::ypollset_t::signal (int signal_)
         sem.post (); 
 }
 
-zmq::ypollset_t::signals_t zmq::ypollset_t::poll ()
+uint64_t zmq::ypollset_t::poll ()
 {
     signals_t result = 0;
     while (!result) {
@@ -47,10 +47,10 @@ zmq::ypollset_t::signals_t zmq::ypollset_t::poll ()
         //  operation (set and reset). In such case looping can occur
         //  sporadically.
     }
-    return result;      
+    return (uint64_t) result;      
 }
 
-zmq::ypollset_t::signals_t zmq::ypollset_t::check ()
+uint64_t zmq::ypollset_t::check ()
 {
-    return bits.xchg (0);
+    return (uint64_t) bits.xchg (0);
 }

src/ypollset.hpp

@@ -35,25 +35,19 @@ namespace zmq
     {
     public:
 
-        typedef atomic_bitmap_t::bitmap_t signals_t;
-
         //  Create the pollset.
         ypollset_t ();
 
-        //  Send a signal to the pollset (i_singnaler implementation).
+        //  i_signaler interface implementation.
         void signal (int signal_);
-
+        uint64_t poll ();
-        //  Wait for signal. Returns a set of signals in form of a bitmap.
+        uint64_t check ();
-        //  Signal with index 0 corresponds to value 1, index 1 to value 2,
-        //  index 2 to value 3 etc.
-        signals_t poll ();
-
-        //  Same as poll, however, if there is no signal available,
-        //  function returns zero immediately instead of waiting for a signal.
-        signals_t check ();
 
     private:
 
+        //  Internal representation of signal bitmap.
+        typedef atomic_bitmap_t::bitmap_t signals_t;
+
         //  Wait signal is carried in the most significant bit of integer.
         enum {wait_signal = sizeof (signals_t) * 8 - 1};