| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef BIN_SIGNAL_BLOCKER_H_ |
| #define BIN_SIGNAL_BLOCKER_H_ |
| |
| #include "platform/globals.h" |
| |
| #if defined(TARGET_OS_WINDOWS) |
| #error Do not include this file on Windows. |
| #endif |
| |
| #include <signal.h> // NOLINT |
| |
| #include "platform/thread.h" |
| |
| namespace dart { |
| namespace bin { |
| |
| class ThreadSignalBlocker { |
| public: |
| explicit ThreadSignalBlocker(int sig) { |
| sigset_t signal_mask; |
| sigemptyset(&signal_mask); |
| sigaddset(&signal_mask, sig); |
| // Add sig to signal mask. |
| int r = pthread_sigmask(SIG_BLOCK, &signal_mask, &old); |
| USE(r); |
| ASSERT(r == 0); |
| } |
| |
| ThreadSignalBlocker(int sigs_count, const int sigs[]) { |
| sigset_t signal_mask; |
| sigemptyset(&signal_mask); |
| for (int i = 0; i < sigs_count; i++) { |
| sigaddset(&signal_mask, sigs[i]); |
| } |
| // Add sig to signal mask. |
| int r = pthread_sigmask(SIG_BLOCK, &signal_mask, &old); |
| USE(r); |
| ASSERT(r == 0); |
| } |
| |
| ~ThreadSignalBlocker() { |
| // Restore signal mask. |
| int r = pthread_sigmask(SIG_SETMASK, &old, NULL); |
| USE(r); |
| ASSERT(r == 0); |
| } |
| |
| private: |
| sigset_t old; |
| }; |
| |
| |
| #define TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ |
| ({ ThreadSignalBlocker tsb(SIGPROF); \ |
| int64_t __result; \ |
| do { \ |
| __result = static_cast<int64_t>(expression); \ |
| } while (__result == -1L && errno == EINTR); \ |
| __result; }) |
| |
| #define VOID_TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression) \ |
| (static_cast<void>(TEMP_FAILURE_RETRY_BLOCK_SIGNALS(expression))) |
| |
| } // namespace bin |
| } // namespace dart |
| |
| #endif // BIN_SIGNAL_BLOCKER_H_ |