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Add simple signal object implementation

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This commit is contained in:
Danny Robson 2011-06-27 15:31:41 +10:00
parent d168996c37
commit d9dba1d155
6 changed files with 179 additions and 21 deletions
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2
Makefile.am
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@ -21,6 +21,7 @@ UTIL_INCLUDE = \
point.hpp \
range.hpp \
region.hpp \
signal.hpp \
stream.hpp \
types.hpp \
vector.hpp \
@ -38,6 +39,7 @@ UTIL_FILES = \
point.cpp \
range.cpp \
region.cpp \
signal.cpp \
stream.cpp \
types.cpp \
vector.cpp \

22
signal.cpp Normal file
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@ -0,0 +1,22 @@
/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011 Danny Robson <danny@blubinc.net>
*/
#include "signal.hpp"

70
signal.hpp Normal file
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@ -0,0 +1,70 @@
/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011 Danny Robson <danny@blubinc.net>
*/
#ifndef __SIGNAL_HPP
#define __SIGNAL_HPP
#include <algorithm>
#include <vector>
#include <functional>
template <typename Ret, typename ...Args>
class signal {
public:
typedef Ret (*callback_function)(Args...);
typedef std::function<Ret(Args...)> callback_object;
protected:
std::vector<callback_object> m_children;
public:
signal ()
{ m_children.reserve (16); }
/// Add a callback to list.
void connect (callback_object _cb)
{ m_children.push_back (_cb); }
void connect (callback_function _cb)
{ m_children.push_back (_cb); }
/// Remove all instances of callback `cb'
void disconnect (callback_function _cb)
{ disconnect (callback_object (_cb)); }
/// Remove all instances of callback `cb'
void disconnect (callback_object _cb) {
m_children.erase (std::remove (m_children.begin (),
m_children.end (),
_cb),
m_children.end ());
}
/// Remove all callbacks
void clear (void)
{ m_children.clear (); }
/// Execute all callbacks. Does not combine results.
void operator () (Args&... tail) {
for (auto i = m_children.begin (), end = m_children.end (); i != end; ++i)
(*i)(tail...);
}
};
#endif // __SIGNAL_HPP

1
test/.gitignore vendored
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@ -6,4 +6,5 @@
/maths
/matrix
/range
/signal
/version

55
test/Makefile.am
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@ -7,35 +7,48 @@ AM_CPPFLAGS = \
AM_LDFLAGS = $(COMMON_LDFLAGS)
TEST_BIN = backtrace float range maths matrix version ip hton
TEST_BIN = \
backtrace \
float \
hton \
ip \
maths \
matrix \
range \
signal \
version
TESTS = $(TEST_BIN) json.pl
check_PROGRAMS = $(TEST_BIN) json-check
EXTRA_DIST = json.pl
backtrace_SOURCES = backtrace.cpp
backtrace_CPPFLAGS = $(COMMON_CXXFLAGS)
backtrace_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
backtrace_LDADD = $(builddir)/../libutil.la
backtrace_SOURCES = backtrace.cpp
float_LDADD = $(builddir)/../libutil.la
float_SOURCES = float.cpp
float_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
range_SOURCES = range.cpp
range_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
maths_SOURCES = maths.cpp
maths_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
matrix_SOURCES = matrix.cpp
matrix_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
version_SOURCES = version.cpp
version_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
ip_SOURCES = ip.cpp
ip_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
hton_LDADD = $(builddir)/../libutil.la
hton_SOURCES = hton.cpp
hton_LDADD = $(builddir)/../libutil.la $(BOOST_SYSTEM_LIB)
json_check_SOURCES = json-check.cpp
ip_LDADD = $(builddir)/../libutil.la
ip_SOURCES = ip.cpp
json_check_LDADD = $(builddir)/../libutil.la $(BOOST_FILESYSTEM_LIB)
json_check_SOURCES = json-check.cpp
maths_LDADD = $(builddir)/../libutil.la
maths_SOURCES = maths.cpp
matrix_LDADD = $(builddir)/../libutil.la
matrix_SOURCES = matrix.cpp
range_LDADD = $(builddir)/../libutil.la
range_SOURCES = range.cpp
signal_LDADD = $(builddir)/../libutil.la
signal_SOURCES = signal.cpp
version_LDADD = $(builddir)/../libutil.la
version_SOURCES = version.cpp

50
test/signal.cpp Normal file
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@ -0,0 +1,50 @@
#include <cstdlib>
#include "../signal.hpp"
#include "../debug.hpp"
void
increment_uint (unsigned int &val)
{ ++val; }
void
test_null (void) {
signal<void> void_signal;
void_signal ();
}
void
test_single (void) {
unsigned int val = 0;
signal<void, unsigned int&> void_signal;
void_signal.connect (increment_uint);
void_signal (val);
check_eq (val, 1);
}
void
test_double (void) {
unsigned int val = 0;
signal<void, unsigned int&> void_signal;
void_signal.connect (increment_uint);
void_signal.connect (increment_uint);
void_signal (val);
check_eq (val, 2);
}
int
main (int, char **) {
test_null ();
test_single ();
test_double ();
return EXIT_SUCCESS;
}