1 // ANNA - Anna is Not Nothingness Anymore
3 // (c) Copyright 2005-2014 Eduardo Ramos Testillano & Francisco Ruiz Rayo
5 // http://redmine.teslayout.com/projects/anna-suite
7 // Redistribution and use in source and binary forms, with or without
8 // modification, are permitted provided that the following conditions
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
17 // * Neither the name of the copyright holder nor the names of its
18 // contributors may be used to endorse or promote products derived from
19 // this software without specific prior written permission.
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 // Authors: eduardo.ramos.testillano@gmail.com
34 // cisco.tierra@gmail.com
37 #ifndef anna_comm_internal_Poll_hpp
38 #define anna_comm_internal_Poll_hpp
44 #include <anna/config/defines.hpp>
45 #include <anna/core/util/defines.hpp>
46 #include <anna/core/RuntimeException.hpp>
47 #include <anna/core/functions.hpp>
54 Clase que asegura que el comm::Reader no se quedara esperando indefinidamente a
55 que un determinado mensaje haya sido tratado y mantiene la integridad de forma
56 ya que asegura que el tratamiento de un mensaje solo tendra un unico signal enviado
57 hacia el comm::Reader.
61 Poll() : a_maxfd(0), a_ptrTimeout(NULL), a_minfd(INT_MAX) {
66 void setTimeout(const Millisecond &timeout) throw();
68 void waitMessage() throw(RuntimeException);
70 bool isEmpty() const throw() { return a_pollr <= 0; }
71 void clear() throw() { a_maxfd = 0; a_minfd = INT_MAX; FD_ZERO(&a_fdmask); FD_ZERO(&a_fdset);}
72 void insert(const int fd) throw();
73 void erase(const int fd) throw();
83 timeval* a_ptrTimeout;
85 static int select(const int maxfd, fd_set* fdset, timeval* timeout)
86 throw(RuntimeException) {
90 result = ::select(maxfd + 1, fdset, NULL, NULL, timeout);
91 } while(result == -1 && errno == EINTR);
95 throw RuntimeException("Error en anna::comm::Poll::select", xerrno, ANNA_FILE_LOCATION);
101 static int min(const Millisecond &n1, const Millisecond &n2) throw() { return (n1 < n2) ? n1 : n2; }