Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::process::extend::handler
// In header: <boost/process/extend.hpp> struct handler { // public member functions template<typename Executor> void on_setup(Executor &) const; template<typename Executor> void on_error(Executor &, const std::error_code &) const; template<typename Executor> void on_success(Executor &) const; template<typename Executor> void on_fork_error(Executor &, const std::error_code &) const; template<typename Executor> void on_exec_setup(Executor &) const; template<typename Executor> void on_exec_error(Executor &, const std::error_code &) const; };
This class is the base for every initializer, to be used for extensions.
The usage is done through compile-time polymorphism, so that the required functions can be overloaded.
![[Note]](../../../../../doc/src/images/note.png) |
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None of the function need to be |
handler public member functionstemplate<typename Executor> void on_setup(Executor &) const;This function is invoked before the process launch.
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It is not required to be const. |
template<typename Executor> void on_error(Executor &, const std::error_code &) const;
This function is invoked if an error occured while trying to launch the process.
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It is not required to be const. |
template<typename Executor> void on_success(Executor &) const;
This function is invoked if the process was successfully launched.
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It is not required to be const. |
template<typename Executor> void on_fork_error(Executor &, const std::error_code &) const;
This function is invoked if an error occured during the call of fork.
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This function will only be called on posix. |
template<typename Executor> void on_exec_setup(Executor &) const;
This function is invoked if the call of fork was successful, before calling execve.
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This function will only be called on posix. |
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It will be invoked from the new process. |
template<typename Executor> void on_exec_error(Executor &, const std::error_code &) const;
This function is invoked if the call of execve failed.
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This function will only be called on posix. |
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Note |
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It will be invoked from the new process. |