forked from mirrors/gecko-dev
615c83d723
# ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D76451
109 lines
2.6 KiB
C++
109 lines
2.6 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 "FileDescriptorUtils.h"
|
|
|
|
#include "nsIEventTarget.h"
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsDebug.h"
|
|
#include "nsNetCID.h"
|
|
#include "nsServiceManagerUtils.h"
|
|
#include "prio.h"
|
|
#include "private/pprio.h"
|
|
|
|
#include <errno.h>
|
|
#ifdef XP_WIN
|
|
# include <io.h>
|
|
#else
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
using mozilla::ipc::CloseFileRunnable;
|
|
|
|
CloseFileRunnable::CloseFileRunnable(const FileDescriptor& aFileDescriptor)
|
|
: Runnable("CloseFileRunnable"), mFileDescriptor(aFileDescriptor) {
|
|
MOZ_ASSERT(aFileDescriptor.IsValid());
|
|
}
|
|
|
|
CloseFileRunnable::~CloseFileRunnable() {
|
|
if (mFileDescriptor.IsValid()) {
|
|
// It's probably safer to take the main thread IO hit here rather than leak
|
|
// the file descriptor.
|
|
CloseFile();
|
|
}
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS_INHERITED0(CloseFileRunnable, Runnable)
|
|
|
|
void CloseFileRunnable::Dispatch() {
|
|
nsCOMPtr<nsIEventTarget> eventTarget =
|
|
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
|
|
NS_ENSURE_TRUE_VOID(eventTarget);
|
|
|
|
nsresult rv = eventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
|
|
NS_ENSURE_SUCCESS_VOID(rv);
|
|
}
|
|
|
|
void CloseFileRunnable::CloseFile() {
|
|
// It's possible for this to happen on the main thread if the dispatch to the
|
|
// stream service fails so we can't assert the thread on which we're running.
|
|
mFileDescriptor = FileDescriptor();
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
CloseFileRunnable::Run() {
|
|
MOZ_ASSERT(!NS_IsMainThread());
|
|
|
|
CloseFile();
|
|
return NS_OK;
|
|
}
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
FILE* FileDescriptorToFILE(const FileDescriptor& aDesc, const char* aOpenMode) {
|
|
if (!aDesc.IsValid()) {
|
|
errno = EBADF;
|
|
return nullptr;
|
|
}
|
|
auto handle = aDesc.ClonePlatformHandle();
|
|
#ifdef XP_WIN
|
|
int fd = _open_osfhandle(static_cast<intptr_t>(handle.get()), 0);
|
|
if (fd == -1) {
|
|
return nullptr;
|
|
}
|
|
Unused << handle.release();
|
|
#else
|
|
int fd = handle.release();
|
|
#endif
|
|
FILE* file = fdopen(fd, aOpenMode);
|
|
if (!file) {
|
|
int saved_errno = errno;
|
|
close(fd);
|
|
errno = saved_errno;
|
|
}
|
|
return file;
|
|
}
|
|
|
|
FileDescriptor FILEToFileDescriptor(FILE* aStream) {
|
|
if (!aStream) {
|
|
errno = EBADF;
|
|
return FileDescriptor();
|
|
}
|
|
#ifdef XP_WIN
|
|
int fd = _fileno(aStream);
|
|
if (fd == -1) {
|
|
return FileDescriptor();
|
|
}
|
|
return FileDescriptor(reinterpret_cast<HANDLE>(_get_osfhandle(fd)));
|
|
#else
|
|
return FileDescriptor(fileno(aStream));
|
|
#endif
|
|
}
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|