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// file : libbutl/win32-utility.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbutl/win32-utility.hxx>
// Note that while we exclude it from the buildfile-based builds, we still
// need these guards for build2 bootstrap.
//
#ifdef _WIN32
#ifndef __cpp_lib_modules_ts
#include <string>
#include <memory> // unique_ptr
#include <libbutl/utility.mxx> // throw_system_error()
#else
import std.core;
import butl.utility;
#endif
using namespace std;
namespace butl
{
namespace win32
{
const nullhandle_t nullhandle (INVALID_HANDLE_VALUE);
void auto_handle::
close ()
{
if (handle_ != INVALID_HANDLE_VALUE)
{
bool r (CloseHandle (handle_));
// If CloseHandle() failed then no reason to expect it to succeed the
// next time.
//
handle_ = INVALID_HANDLE_VALUE;
if (!r)
throw_system_error (GetLastError ());
}
}
struct msg_deleter
{
void operator() (char* p) const {LocalFree (p);}
};
string
error_msg (DWORD code)
{
char* msg;
if (!FormatMessageA (
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_MAX_WIDTH_MASK,
0,
code,
MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
(char*)&msg,
0,
0))
return "unknown error code " + std::to_string (code);
unique_ptr<char, msg_deleter> m (msg);
return msg;
}
string
last_error_msg ()
{
return error_msg (GetLastError ());
}
}
}
#endif // _WIN32
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