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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef BIN_SIGNAL_BLOCKER_H_ | 5 #ifndef BIN_SIGNAL_BLOCKER_H_ |
6 #define BIN_SIGNAL_BLOCKER_H_ | 6 #define BIN_SIGNAL_BLOCKER_H_ |
7 | 7 |
8 #include "platform/globals.h" | 8 #include "platform/globals.h" |
9 | 9 |
10 #if defined(TARGET_OS_WINDOWS) | 10 #if defined(TARGET_OS_WINDOWS) |
11 #error Do not include this file on Windows. | 11 #error Do not include this file on Windows. |
12 #endif | 12 #endif |
13 | 13 |
14 #include <signal.h> // NOLINT | 14 #include <signal.h> // NOLINT |
15 | 15 |
16 #include "platform/thread.h" | 16 #include "platform/thread.h" |
17 | 17 |
18 namespace dart { | 18 namespace dart { |
19 namespace bin { | 19 namespace bin { |
20 | 20 |
21 class ThreadSignalBlocker { | 21 class ThreadSignalBlocker { |
22 public: | 22 public: |
23 explicit ThreadSignalBlocker(int sig) { | 23 explicit ThreadSignalBlocker(int sig) { |
24 sigset_t signal_mask; | 24 sigset_t signal_mask; |
25 sigemptyset(&signal_mask); | 25 sigemptyset(&signal_mask); |
26 sigaddset(&signal_mask, sig); | 26 sigaddset(&signal_mask, sig); |
27 // Add sig to signal mask. | 27 // Add sig to signal mask. |
28 int r = pthread_sigmask(SIG_BLOCK, &signal_mask, &old); | 28 int r = pthread_sigmask(SIG_BLOCK, &signal_mask, &old); |
29 USE(r); | |
30 ASSERT(r == 0); | |
31 } | |
32 | |
33 ThreadSignalBlocker(int sigs_count, const int sigs[]) { | |
34 sigset_t signal_mask; | |
35 sigemptyset(&signal_mask); | |
36 for (int i = 0; i < sigs_count; i++) { | |
37 sigaddset(&signal_mask, sigs[i]); | |
38 } | |
39 // Add sig to signal mask. | |
40 int r = pthread_sigmask(SIG_BLOCK, &signal_mask, &old); | |
41 USE(r); | |
42 ASSERT(r == 0); | 29 ASSERT(r == 0); |
43 } | 30 } |
44 | 31 |
45 ~ThreadSignalBlocker() { | 32 ~ThreadSignalBlocker() { |
46 // Restore signal mask. | 33 // Restore signal mask. |
47 int r = pthread_sigmask(SIG_SETMASK, &old, NULL); | 34 int r = pthread_sigmask(SIG_SETMASK, &old, NULL); |
48 USE(r); | |
49 ASSERT(r == 0); | 35 ASSERT(r == 0); |
50 } | 36 } |
51 | 37 |
52 private: | 38 private: |
53 sigset_t old; | 39 sigset_t old; |
54 }; | 40 }; |
55 | 41 |
56 | 42 |
57 #define TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ | 43 #define TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ |
58 ({ ThreadSignalBlocker tsb(SIGPROF); \ | 44 ({ ThreadSignalBlocker tsb(SIGPROF); \ |
59 int64_t __result; \ | 45 int64_t __result; \ |
60 do { \ | 46 do { \ |
61 __result = static_cast<int64_t>(expression); \ | 47 __result = static_cast<int64_t>(expression); \ |
62 } while (__result == -1L && errno == EINTR); \ | 48 } while (__result == -1L && errno == EINTR); \ |
63 __result; }) | 49 __result; }) |
64 | 50 |
65 #define VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ | 51 #define VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ |
66 (static_cast<void>(TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression))) | 52 (static_cast<void>(TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression))) |
67 | 53 |
68 } // namespace bin | 54 } // namespace bin |
69 } // namespace dart | 55 } // namespace dart |
70 | 56 |
71 #endif // BIN_SIGNAL_BLOCKER_H_ | 57 #endif // BIN_SIGNAL_BLOCKER_H_ |
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