1 | // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 | // for details. All rights reserved. Use of this source code is governed by a |
3 | // BSD-style license that can be found in the LICENSE file. |
4 | |
5 | #ifndef RUNTIME_BIN_FDUTILS_H_ |
6 | #define RUNTIME_BIN_FDUTILS_H_ |
7 | |
8 | #include "bin/builtin.h" |
9 | #include "platform/globals.h" |
10 | |
11 | namespace dart { |
12 | namespace bin { |
13 | |
14 | class FDUtils { |
15 | public: |
16 | static bool SetCloseOnExec(intptr_t fd); |
17 | |
18 | static bool SetNonBlocking(intptr_t fd); |
19 | static bool SetBlocking(intptr_t fd); |
20 | |
21 | // Checks whether the file descriptor is blocking. If the function |
22 | // returns true the value pointed to by is_blocking will be set to |
23 | // the blocking state of the file descriptor. If the function |
24 | // returns false the system call for checking the file descriptor |
25 | // failed and the value pointed to by is_blocking is not modified. |
26 | static bool IsBlocking(intptr_t fd, bool* is_blocking); |
27 | |
28 | static intptr_t AvailableBytes(intptr_t fd); |
29 | |
30 | // Reads the requested number of bytes from a file descriptor. This |
31 | // function will only return on short reads if an error occours in |
32 | // which case it returns -1 and errno is still valid. The file |
33 | // descriptor must be in blocking mode. |
34 | static ssize_t ReadFromBlocking(int fd, void* buffer, size_t count); |
35 | |
36 | // Writes the requested number of bytes to a file descriptor. This |
37 | // function will only return on short writes if an error occours in |
38 | // which case it returns -1 and errno is still valid. The file |
39 | // descriptor must be in blocking mode. |
40 | static ssize_t WriteToBlocking(int fd, const void* buffer, size_t count); |
41 | |
42 | // Closes fd without modifying errno. |
43 | static void SaveErrorAndClose(intptr_t fd); |
44 | |
45 | private: |
46 | DISALLOW_ALLOCATION(); |
47 | DISALLOW_IMPLICIT_CONSTRUCTORS(FDUtils); |
48 | }; |
49 | |
50 | } // namespace bin |
51 | } // namespace dart |
52 | |
53 | #endif // RUNTIME_BIN_FDUTILS_H_ |
54 | |