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/*
* mptOSException.h
* ----------------
* Purpose: platform-specific exception/signal handling
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#pragma once
#include "openmpt/all/BuildSettings.hpp"
#include "mptBaseMacros.h"
#include "mptBaseTypes.h"
#if MPT_OS_WINDOWS
#include <windows.h>
#endif // MPT_OS_WINDOWS
OPENMPT_NAMESPACE_BEGIN
#if MPT_OS_WINDOWS
namespace Windows
{
namespace SEH
{
struct Code
{
private:
DWORD m_Code;
public:
constexpr Code(DWORD code) noexcept
: m_Code(code)
{
return;
}
public:
constexpr DWORD code() const noexcept
{
return m_Code;
}
};
template <typename Tfn, typename Tfilter, typename Thandler>
auto TryFilterHandleThrow(const Tfn &fn, const Tfilter &filter, const Thandler &handler) -> decltype(fn())
{
static_assert(std::is_trivially_copy_assignable<decltype(fn())>::value);
static_assert(std::is_trivially_copy_constructible<decltype(fn())>::value);
static_assert(std::is_trivially_move_assignable<decltype(fn())>::value);
static_assert(std::is_trivially_move_constructible<decltype(fn())>::value);
DWORD code = 0;
__try
{
return fn();
} __except(filter(GetExceptionCode(), GetExceptionInformation()))
{
code = GetExceptionCode();
}
throw Windows::SEH::Code(code);
}
template <typename Tfn, typename Tfilter, typename Thandler>
void TryFilterHandleVoid(const Tfn &fn, const Tfilter &filter, const Thandler &handler)
{
static_assert(std::is_same<decltype(fn()), void>::value || std::is_trivially_copy_assignable<decltype(fn())>::value);
static_assert(std::is_same<decltype(fn()), void>::value || std::is_trivially_copy_constructible<decltype(fn())>::value);
static_assert(std::is_same<decltype(fn()), void>::value || std::is_trivially_move_assignable<decltype(fn())>::value);
static_assert(std::is_same<decltype(fn()), void>::value || std::is_trivially_move_constructible<decltype(fn())>::value);
__try
{
fn();
return;
} __except(filter(GetExceptionCode(), GetExceptionInformation()))
{
DWORD code = GetExceptionCode();
handler(code);
}
return;
}
template <typename Tfn, typename Tfilter, typename Thandler>
auto TryFilterHandleDefault(const Tfn &fn, const Tfilter &filter, const Thandler &handler, decltype(fn()) def = decltype(fn()){}) -> decltype(fn())
{
static_assert(std::is_trivially_copy_assignable<decltype(fn())>::value);
static_assert(std::is_trivially_copy_constructible<decltype(fn())>::value);
static_assert(std::is_trivially_move_assignable<decltype(fn())>::value);
static_assert(std::is_trivially_move_constructible<decltype(fn())>::value);
auto result = def;
__try
{
result = fn();
} __except(filter(GetExceptionCode(), GetExceptionInformation()))
{
DWORD code = GetExceptionCode();
result = handler(code);
}
return result;
}
template <typename Tfn>
auto TryReturnOrThrow(const Tfn &fn) -> decltype(fn())
{
return TryFilterHandleThrow(
fn,
[](auto code, auto eptr)
{
MPT_UNREFERENCED_PARAMETER(code);
MPT_UNREFERENCED_PARAMETER(eptr);
return EXCEPTION_EXECUTE_HANDLER;
},
[](auto code)
{
throw Windows::SEH::Code(code);
});
}
template <typename Tfn>
DWORD TryOrError(const Tfn &fn)
{
DWORD result = DWORD{0};
TryFilterHandleVoid(
fn,
[](auto code, auto eptr)
{
MPT_UNREFERENCED_PARAMETER(code);
MPT_UNREFERENCED_PARAMETER(eptr);
return EXCEPTION_EXECUTE_HANDLER;
},
[&result](auto code)
{
result = code;
});
return result;
}
template <typename Tfn>
auto TryReturnOrDefault(const Tfn &fn, decltype(fn()) def = decltype(fn()){}) -> decltype(fn())
{
return TryFilterHandleDefault(
fn,
[](auto code, auto eptr)
{
MPT_UNREFERENCED_PARAMETER(code);
MPT_UNREFERENCED_PARAMETER(eptr);
return EXCEPTION_EXECUTE_HANDLER;
},
[def](auto code)
{
MPT_UNREFERENCED_PARAMETER(code);
return def;
});
}
} // namspace SEH
} // namespace Windows
#endif // MPT_OS_WINDOWS
OPENMPT_NAMESPACE_END
|
