mirror of
https://github.com/dart-lang/sdk
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95db62d6a2
This fixes problem with directory watching on Windows where data might be accumulated before dart stream is setup. Bug: https://github.com/dart-lang/sdk/issues/37909 Change-Id: I601842522e76e4a6a4e6a22d6b376a49af200e6f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/115801 Reviewed-by: Zichang Guo <zichangguo@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>
133 lines
3.9 KiB
C++
133 lines
3.9 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(HOST_OS_WINDOWS)
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#include "bin/file_system_watcher.h"
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#include <WinIoCtl.h> // NOLINT
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#include "bin/builtin.h"
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#include "bin/eventhandler.h"
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#include "bin/utils.h"
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#include "bin/utils_win.h"
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#include "platform/syslog.h"
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namespace dart {
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namespace bin {
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bool FileSystemWatcher::IsSupported() {
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return true;
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}
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intptr_t FileSystemWatcher::Init() {
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return 0;
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}
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void FileSystemWatcher::Close(intptr_t id) {
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USE(id);
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}
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intptr_t FileSystemWatcher::WatchPath(intptr_t id,
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Namespace* namespc,
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const char* path,
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int events,
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bool recursive) {
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USE(id);
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Utf8ToWideScope name(path);
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HANDLE dir = CreateFileW(
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name.wide(), FILE_LIST_DIRECTORY,
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FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
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OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, NULL);
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if (dir == INVALID_HANDLE_VALUE) {
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return -1;
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}
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int list_events = 0;
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if ((events & (kCreate | kMove | kDelete)) != 0) {
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list_events |= FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME;
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}
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if ((events & kModifyContent) != 0) {
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list_events |= FILE_NOTIFY_CHANGE_LAST_WRITE;
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}
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DirectoryWatchHandle* handle =
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new DirectoryWatchHandle(dir, list_events, recursive);
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// Issue a read directly, to be sure events are tracked from now on. This is
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// okay, since in Dart, we create the socket and start reading immidiately.
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handle->EnsureInitialized(EventHandler::delegate());
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handle->IssueRead();
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return reinterpret_cast<intptr_t>(handle);
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}
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void FileSystemWatcher::UnwatchPath(intptr_t id, intptr_t path_id) {
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USE(id);
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DirectoryWatchHandle* handle =
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reinterpret_cast<DirectoryWatchHandle*>(path_id);
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handle->Stop();
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}
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intptr_t FileSystemWatcher::GetSocketId(intptr_t id, intptr_t path_id) {
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USE(id);
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return path_id;
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}
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Dart_Handle FileSystemWatcher::ReadEvents(intptr_t id, intptr_t path_id) {
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USE(id);
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const intptr_t kEventSize = sizeof(FILE_NOTIFY_INFORMATION);
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DirectoryWatchHandle* dir = reinterpret_cast<DirectoryWatchHandle*>(path_id);
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intptr_t available = dir->Available();
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intptr_t max_count = available / kEventSize + 1;
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Dart_Handle events = Dart_NewList(max_count);
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uint8_t* buffer = Dart_ScopeAllocate(available);
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intptr_t bytes = dir->Read(buffer, available);
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intptr_t offset = 0;
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intptr_t i = 0;
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while (offset < bytes) {
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FILE_NOTIFY_INFORMATION* e =
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reinterpret_cast<FILE_NOTIFY_INFORMATION*>(buffer + offset);
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Dart_Handle event = Dart_NewList(5);
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int mask = 0;
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if (e->Action == FILE_ACTION_ADDED) {
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mask |= kCreate;
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}
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if (e->Action == FILE_ACTION_REMOVED) {
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mask |= kDelete;
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}
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if (e->Action == FILE_ACTION_MODIFIED) {
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mask |= kModifyContent;
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}
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if (e->Action == FILE_ACTION_RENAMED_OLD_NAME) {
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mask |= kMove;
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}
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if (e->Action == FILE_ACTION_RENAMED_NEW_NAME) {
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mask |= kMove;
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}
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Dart_ListSetAt(event, 0, Dart_NewInteger(mask));
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// Move events come in pairs. Just 'enable' by default.
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Dart_ListSetAt(event, 1, Dart_NewInteger(1));
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Dart_ListSetAt(
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event, 2,
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Dart_NewStringFromUTF16(reinterpret_cast<uint16_t*>(e->FileName),
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e->FileNameLength / 2));
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Dart_ListSetAt(event, 3, Dart_NewBoolean(true));
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Dart_ListSetAt(event, 4, Dart_NewInteger(path_id));
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Dart_ListSetAt(events, i, event);
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i++;
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if (e->NextEntryOffset == 0) {
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break;
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}
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offset += e->NextEntryOffset;
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}
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return events;
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(HOST_OS_WINDOWS)
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