mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 21:01:08 +00:00
6027e4657c
This is convenient in cross-platform code which needs to work with `UniqueFileHandle` objects. `dup` is not supported by wasi, so the method isn't available there. Differential Revision: https://phabricator.services.mozilla.com/D221370
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "UniquePtrExtensions.h"
|
|
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/DebugOnly.h"
|
|
|
|
#ifdef XP_WIN
|
|
# include <windows.h>
|
|
#else
|
|
# include <errno.h>
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
namespace detail {
|
|
|
|
void FileHandleDeleter::operator()(FileHandleHelper aHelper) {
|
|
if (aHelper != nullptr) {
|
|
DebugOnly<bool> ok;
|
|
#ifdef XP_WIN
|
|
ok = CloseHandle(aHelper);
|
|
#else
|
|
ok = close(aHelper) == 0 || errno == EINTR;
|
|
#endif
|
|
MOZ_ASSERT(ok, "failed to close file handle");
|
|
}
|
|
}
|
|
|
|
} // namespace detail
|
|
|
|
#ifndef __wasm__
|
|
UniqueFileHandle DuplicateFileHandle(detail::FileHandleType aFile) {
|
|
# ifdef XP_WIN
|
|
if (aFile != INVALID_HANDLE_VALUE && aFile != NULL) {
|
|
HANDLE handle;
|
|
HANDLE currentProcess = ::GetCurrentProcess();
|
|
if (::DuplicateHandle(currentProcess, aFile, currentProcess, &handle, 0,
|
|
false, DUPLICATE_SAME_ACCESS)) {
|
|
return UniqueFileHandle{handle};
|
|
}
|
|
}
|
|
# else
|
|
if (aFile != -1) {
|
|
return UniqueFileHandle{dup(aFile)};
|
|
}
|
|
# endif
|
|
return nullptr;
|
|
}
|
|
#endif
|
|
|
|
} // namespace mozilla
|