自定义异常类型

建立异常类 error.hpp

#ifndef BANK_ERROR_HPP
#define BANK_ERROR_HPP

#include <exception>

namespace bank {

class error : public std::exception
{
    public:
        explicit error(const char*) throw();
        virtual ~error(void) throw();

        virtual const char* what(void) const throw();

    private:
        const char* message;
};

} /* namespace bank */

#endif 
使用方法如下:
#include <error.hpp>


namespace {

struct thread
{
    static HANDLE& get(void) { static HANDLE handle; return handle; }
    static DWORD WINAPI execute(void* data) { static_cast<bank::detail::thread*>(data)->run(); return 0; }
};

}

namespace bank {
namespace detail {

thread::~thread(void) { CloseHandle(::thread::get()); }

void thread::yield(void) { Sleep(0); }
void thread::wait(void) { WaitForSingleObject(::thread::get(), INFINITE); }

#if defined(max)
    #undef max
#endif
 void thread::start(void)
{
   ::thread::get() = CreateThread(NULL, (std::numeric_limits<uint16_t>::max() + 1) * 2,
                                 ::thread::execute, this, STACK_SIZE_PARAM_IS_A_RESERVATION, NULL);
    if (::thread::get() == NULL) { throw error("Could not create collector thread"); }
}
#define max(a, b) a > b ? a : b


}} 
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