OLD | NEW |
| (Empty) |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/public/common/sandbox_init.h" | |
6 | |
7 #if defined(OS_POSIX) | |
8 #include <unistd.h> | |
9 #endif | |
10 | |
11 namespace content { | |
12 | |
13 IPC::PlatformFileForTransit BrokerGetFileHandleForProcess( | |
14 base::PlatformFile handle, | |
15 base::ProcessId target_process_id, | |
16 bool should_close_source) { | |
17 IPC::PlatformFileForTransit out_handle; | |
18 #if defined(OS_WIN) | |
19 DWORD options = DUPLICATE_SAME_ACCESS; | |
20 if (should_close_source) | |
21 options |= DUPLICATE_CLOSE_SOURCE; | |
22 if (!content::BrokerDuplicateHandle(handle, target_process_id, &out_handle, | |
23 0, options)) { | |
24 out_handle = IPC::InvalidPlatformFileForTransit(); | |
25 } | |
26 #elif defined(OS_POSIX) | |
27 // If asked to close the source, we can simply re-use the source fd instead of | |
28 // dup()ing and close()ing. | |
29 // When we're not closing the source, we need to duplicate the handle and take | |
30 // ownership of that. The reason is that this function is often used to | |
31 // generate IPC messages, and the handle must remain valid until it's sent to | |
32 // the other process from the I/O thread. Without the dup, calling code might | |
33 // close the source handle before the message is sent, creating a race | |
34 // condition. | |
35 int fd = should_close_source ? handle : ::dup(handle); | |
36 out_handle = base::FileDescriptor(fd, true); | |
37 #else | |
38 #error Not implemented. | |
39 #endif | |
40 return out_handle; | |
41 } | |
42 | |
43 } // namespace content | |
44 | |
OLD | NEW |