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Python->C++ exception translation

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[SVN r14800]
This commit is contained in:
Dave Abrahams
2002-08-13 00:45:09 +00:00
parent 0a6a213891
commit fe3cf386c3
8 changed files with 212 additions and 2 deletions
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45
src/errors.cpp
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@@ -10,14 +10,21 @@
#include <boost/python/errors.hpp>
#include <boost/cast.hpp>
#ifdef BOOST_PYTHON_V2
# include <boost/python/detail/exception_handler.hpp>
#endif
namespace boost { namespace python {
// IMPORTANT: this function may only be called from within a catch block!
BOOST_PYTHON_DECL bool handle_exception_impl(function0<void> f)
BOOST_PYTHON_DECL bool handle_exception_impl(function0<void> const& f)
{
try
{
#ifdef BOOST_PYTHON_V2
if (detail::exception_handler::chain)
return detail::exception_handler::chain->handle(f);
#endif
f();
return false;
}
@@ -68,6 +75,42 @@ namespace detail {
// needed by void_adaptor (see void_adaptor.hpp)
BOOST_PYTHON_DECL PyObject arbitrary_object = { 0 };
#ifdef BOOST_PYTHON_V2
bool exception_handler::operator()(function0<void> const& f) const
{
if (m_next)
{
return m_next->handle(f);
}
else
{
f();
return false;
}
}
exception_handler::exception_handler(handler_function const& impl)
: m_impl(impl)
, m_next(0)
{
if (chain != 0)
tail->m_next = this;
else
chain = this;
tail = this;
}
exception_handler* exception_handler::chain;
exception_handler* exception_handler::tail;
BOOST_PYTHON_DECL void register_exception_handler(handler_function const& f)
{
// the constructor links the new object into a handler chain, so
// this object isn't actaully leaked (until, of course, the
// interpreter exits).
new exception_handler(f);
}
#endif
} // namespace boost::python::detail