1 /*
2 * Copyright (c) 2021 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 "posix_fallocate.h"
16 #include <cstring>
17 #include <fcntl.h>
18 #include <tuple>
19 #include <unistd.h>
20
21 #include "../../common/napi/n_async/n_async_work_callback.h"
22 #include "../../common/napi/n_async/n_async_work_promise.h"
23 #include "../../common/napi/n_func_arg.h"
24
25 namespace OHOS {
26 namespace DistributedFS {
27 namespace ModuleFileIO {
28 using namespace std;
29
GetPosixFallocateArg(napi_env env,const NFuncArg & funcArg)30 static tuple<bool, int, int, int> GetPosixFallocateArg(napi_env env, const NFuncArg &funcArg)
31 {
32 bool succ = false;
33 int fd;
34 tie(succ, fd) = NVal(env, funcArg[NARG_POS::FIRST]).ToInt32();
35 if (!succ) {
36 UniError(EINVAL).ThrowErr(env, "Invalid fd");
37 return { false, -1, -1, -1 };
38 }
39 int offset;
40 tie(succ, offset) = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32();
41 if (!succ) {
42 UniError(EINVAL).ThrowErr(env, "Invalid offset");
43 return { false, -1, -1, -1 };
44 }
45 int len;
46 tie(succ, len) = NVal(env, funcArg[NARG_POS::THIRD]).ToInt32();
47 if (!succ) {
48 UniError(EINVAL).ThrowErr(env, "Invalid len");
49 return { false, -1, -1, -1 };
50 }
51 return { succ, fd, offset, len };
52 }
53
Sync(napi_env env,napi_callback_info info)54 napi_value PosixFallocate::Sync(napi_env env, napi_callback_info info)
55 {
56 NFuncArg funcArg(env, info);
57 if (!funcArg.InitArgs(NARG_CNT::THREE)) {
58 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
59 return nullptr;
60 }
61 bool succ = false;
62 int fd;
63 int offset;
64 int len;
65 tie(succ, fd, offset, len) = GetPosixFallocateArg(env, funcArg);
66 if (!succ) {
67 return nullptr;
68 }
69 int ret = posix_fallocate(fd, offset, len);
70 if (ret == -1) {
71 UniError(errno).ThrowErr(env);
72 return nullptr;
73 }
74 return NVal::CreateUndefined(env).val_;
75 }
76
Async(napi_env env,napi_callback_info info)77 napi_value PosixFallocate::Async(napi_env env, napi_callback_info info)
78 {
79 NFuncArg funcArg(env, info);
80 if (!funcArg.InitArgs(NARG_CNT::THREE, NARG_CNT::FOUR)) {
81 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
82 return nullptr;
83 }
84 bool succ = false;
85 int fd;
86 int offset;
87 int len;
88 tie(succ, fd, offset, len) = GetPosixFallocateArg(env, funcArg);
89 if (!succ) {
90 return nullptr;
91 }
92 auto cbExec = [fd, offset, len](napi_env env) -> UniError {
93 if (posix_fallocate(fd, offset, len) == -1) {
94 return UniError(errno);
95 } else {
96 return UniError(ERRNO_NOERR);
97 }
98 };
99 auto cbCompl = [](napi_env env, UniError err) -> NVal {
100 if (err) {
101 return { env, err.GetNapiErr(env) };
102 }
103 return { NVal::CreateUndefined(env) };
104 };
105 NVal thisVar(env, funcArg.GetThisVar());
106 string procedureName = "fileioPosixFallocate";
107 size_t argc = funcArg.GetArgc();
108 if (argc == NARG_CNT::THREE) {
109 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
110 } else {
111 NVal cb(env, funcArg[NARG_POS::FOURTH]);
112 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
113 }
114 return NVal::CreateUndefined(env).val_;
115 }
116 } // namespace ModuleFileIO
117 } // namespace DistributedFS
118 } // namespace OHOS