1 | /** |
2 | * Copyright (c) Glow Contributors. See CONTRIBUTORS file. |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | */ |
16 | |
17 | // This file contains the print functionality the JIT code can use. The backend |
18 | // can call function to emit a global var that points to the host side struct |
19 | // containing fopen/fprintf/fclose pointers, JIT code can call instead of it's |
20 | // own fopen/fprintf/fclose. |
21 | |
22 | #include <condition_variable> |
23 | #include <cstdarg> |
24 | #include <unordered_map> |
25 | |
26 | /// Structure implements file I/O related functions. Currently, |
27 | /// it just maps C-lib fopen/fprintf/fclose onto it's members. |
28 | struct JITFileWriterIF { |
29 | FILE *(*fopen)(const char *, const char *); |
30 | int (*fprintf)(FILE *, const char *, ...); |
31 | int (*fclose)(FILE *); |
32 | }; |
33 | |
34 | struct JITFileWriter { |
35 | JITFileWriterIF IF; |
36 | /// Open a file. Operation, arguments and return value match standard fopen |
37 | /// function. |
38 | static FILE *JITfopen(const char *, const char *); |
39 | /// Writes the C string pointed by format to the stream. Operation, arguments |
40 | /// and return value match standard fprintf function. |
41 | static int JITfprintf(FILE *, const char *, ...); |
42 | /// Close a file. Operation, arguments and return value match standard fclose |
43 | /// function. |
44 | static int JITfclose(FILE *); |
45 | JITFileWriter() { |
46 | IF.fopen = &JITfopen; |
47 | IF.fprintf = &JITfprintf; |
48 | IF.fclose = &JITfclose; |
49 | } |
50 | std::unordered_map<std::string, bool> fileLock_; |
51 | std::unordered_map<FILE *, std::string> fileMap_; |
52 | std::condition_variable readyCV; |
53 | std::mutex mtx_; |
54 | }; |
55 | |