1 /*
2 * Copyright (c) 2021-2025 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "flush.h"
16
17 #include <memory>
18 #include <tuple>
19
20 #include "class_stat/stat_entity.h"
21 #include "class_stat/stat_n_exporter.h"
22 #include "n_async_work_callback.h"
23 #include "n_async_work_promise.h"
24 #include "n_class.h"
25 #include "n_func_arg.h"
26 #include "n_val.h"
27 #include "uni_error.h"
28
29 namespace OHOS {
30 namespace DistributedFS {
31 namespace ModuleFileIO {
32 using namespace std;
33
34 struct StreamEntity {
35 std::unique_ptr<FILE, decltype(&fclose)> fp = { nullptr, fclose };
36 };
37
Sync(napi_env env,napi_callback_info info)38 napi_value Flush::Sync(napi_env env, napi_callback_info info)
39 {
40 NFuncArg funcArg(env, info);
41 if (!funcArg.InitArgs(NARG_CNT::ZERO)) {
42 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
43 return nullptr;
44 }
45
46 auto streamEntity = NClass::GetEntityOf<StreamEntity>(env, funcArg.GetThisVar());
47 if (!streamEntity || !streamEntity->fp) {
48 UniError(EBADF).ThrowErr(env, "Stream may has been closed");
49 return nullptr;
50 }
51
52 int ret = fflush(streamEntity->fp.get());
53 if (ret == -1) {
54 UniError(errno).ThrowErr(env);
55 return nullptr;
56 }
57 return NVal::CreateUndefined(env).val_;
58 }
59
Async(napi_env env,napi_callback_info info)60 napi_value Flush::Async(napi_env env, napi_callback_info info)
61 {
62 NFuncArg funcArg(env, info);
63 if (!funcArg.InitArgs(NARG_CNT::ZERO, NARG_CNT::ONE)) {
64 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
65 return nullptr;
66 }
67
68 auto streamEntity = NClass::GetEntityOf<StreamEntity>(env, funcArg.GetThisVar());
69 if (!streamEntity || !streamEntity->fp) {
70 UniError(EBADF).ThrowErr(env, "Stream may has been closed");
71 return nullptr;
72 }
73
74 auto cbExec = [streamEntity](napi_env env) -> UniError {
75 int ret = fflush(streamEntity->fp.get());
76 if (ret == -1) {
77 return UniError(errno);
78 } else {
79 return UniError(ERRNO_NOERR);
80 }
81 };
82 auto cbCompl = [](napi_env env, UniError err) -> NVal {
83 if (err) {
84 return { env, err.GetNapiErr(env) };
85 }
86 return { NVal::CreateUndefined(env) };
87 };
88
89 NVal thisVar(env, funcArg.GetThisVar());
90 string procedureName = "fileIOFlush";
91 if (funcArg.GetArgc() == NARG_CNT::ZERO) {
92 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
93 } else {
94 NVal cb(env, funcArg[NARG_POS::FIRST]);
95 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
96 }
97 }
98 } // namespace ModuleFileIO
99 } // namespace DistributedFS
100 } // namespace OHOS