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
39 #include <anna/core/mt/Semaphore.hpp>
40 #include <anna/core/RuntimeException.hpp>
41 #include <anna/core/functions.hpp>
42 #include <anna/config/defines.hpp>
46 Semaphore::Semaphore(unsigned int count) :
49 sem_init(&a_id, 0, count);
53 Semaphore::~Semaphore() {
59 void Semaphore::wait()
60 throw(RuntimeException) {
63 anna_signal_shield(errorCode, sem_wait(&a_id));
66 throw RuntimeException(std::string("Error doing wait"), errno, ANNA_FILE_LOCATION);
71 bool Semaphore::tryWait()
72 throw(RuntimeException) {
77 if((errorCode = sem_trywait(&a_id)) != 0) {
78 if(errorCode != EBUSY)
79 throw RuntimeException(std::string("Error trying wait"), errno, ANNA_FILE_LOCATION);
88 void Semaphore::signal()
89 throw(RuntimeException) {
91 int errorCode = sem_post(&a_id);
94 throw RuntimeException(std::string("Error doing post"), errno, ANNA_FILE_LOCATION);
99 std::string Semaphore::asString() const
101 std::string msg("anna::Semaphone { Id: ");
102 msg += functions::asHexString(anna_ptrnumber_cast(&a_id));
106 sem_getvalue(&(const_cast <Semaphore*>(this)->a_id), &value);
107 msg += functions::asString(value);