boost bind signal

本文将介绍如何利用Boost库中的信号与槽机制,通过`boost::signals2`和`boost::bind`实现简单回调函数的创建与触发。

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#include <boost/signals2.hpp> 
#include <boost/bind.hpp> 
#include <boost/ref.hpp>   
int main(void) 
{   
boost::signals2::signal<void(int)> sig;   

boost::function<void()> f = boost::bind(boost::ref(sig), 10); 

In file included from /usr/include/boost/math/special_functions/detail/round_fwd.hpp:11, from /usr/include/boost/math/special_functions/math_fwd.hpp:29, from /usr/include/boost/math/special_functions/next.hpp:13, from /root/Workspace/openpose/3rdparty/caffe/src/caffe/util/math_functions.cpp:1: /usr/include/boost/math/tools/config.hpp:23:6: warning: #warning "The minimum language standard to use Boost.Math will be C++14 starting in July 2023 (Boost 1.82 release)" [-Wcpp] 23 | # warning "The minimum language standard to use Boost.Math will be C++14 starting in July 2023 (Boost 1.82 release)" | ^~~~~~~ In file included from /usr/include/boost/bind/detail/requires_cxx11.hpp:9, from /usr/include/boost/bind/bind.hpp:24, from /usr/include/boost/bind.hpp:29, from /root/Workspace/openpose/3rdparty/caffe/src/caffe/util/signal_handler.cpp:1: /usr/include/boost/bind.hpp:36:1: note: ‘#pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior.’ 36 | BOOST_PRAGMA_MESSAGE( | ^~~~~~~~~~~~~~~~~~~~ /root/Workspace/openpose/3rdparty/caffe/src/caffe/util/io.cpp: In function ‘bool caffe::ReadProtoFromBinaryFile(const char*, google::protobuf::Message*)’: /root/Workspace/openpose/3rdparty/caffe/src/caffe/util/io.cpp:57:66: error: no matching function for call to ‘google::protobuf::io::CodedInputStream::SetTotalBytesLimit(const int&, int)’ 57 | coded_input->SetTotalBytesLimit(kProtoReadBytesLimit, 536870912); | ^ In file included from /root/Workspace/openpose/3rdparty/caffe/src/caffe/util/io.cpp:2: /usr/local/include/google/protobuf/io/coded_stream.h:407:8: note: candidate: ‘void google::pr
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03-17
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