OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "rlz/lib/recursive_cross_process_lock_posix.h" | 5 #include "rlz/lib/recursive_cross_process_lock_posix.h" |
6 | 6 |
7 #include <sys/file.h> | 7 #include <sys/file.h> |
8 #include <sys/types.h> | 8 #include <sys/types.h> |
9 #include <sys/stat.h> | 9 #include <sys/stat.h> |
10 #include <fcntl.h> | 10 #include <fcntl.h> |
11 #include <unistd.h> | 11 #include <unistd.h> |
12 | 12 |
13 #include "base/file_path.h" | 13 #include "base/file_path.h" |
14 #include "base/logging.h" | 14 #include "base/logging.h" |
15 #include "base/posix/eintr_wrapper.h" | 15 #include "base/posix/eintr_wrapper.h" |
16 | 16 |
17 namespace rlz_lib { | 17 namespace rlz_lib { |
18 | 18 |
19 bool RecursiveCrossProcessLock::TryGetCrossProcessLock( | 19 bool RecursiveCrossProcessLock::TryGetCrossProcessLock( |
20 const FilePath& lock_filename) { | 20 const base::FilePath& lock_filename) { |
21 bool just_got_lock = false; | 21 bool just_got_lock = false; |
22 | 22 |
23 // Emulate a recursive mutex with a non-recursive one. | 23 // Emulate a recursive mutex with a non-recursive one. |
24 if (pthread_mutex_trylock(&recursive_lock_) == EBUSY) { | 24 if (pthread_mutex_trylock(&recursive_lock_) == EBUSY) { |
25 if (pthread_equal(pthread_self(), locking_thread_) == 0) { | 25 if (pthread_equal(pthread_self(), locking_thread_) == 0) { |
26 // Some other thread has the lock, wait for it. | 26 // Some other thread has the lock, wait for it. |
27 pthread_mutex_lock(&recursive_lock_); | 27 pthread_mutex_lock(&recursive_lock_); |
28 CHECK(locking_thread_ == 0); | 28 CHECK(locking_thread_ == 0); |
29 just_got_lock = true; | 29 just_got_lock = true; |
30 } | 30 } |
(...skipping 42 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
73 ignore_result(HANDLE_EINTR(flock(file_lock_, LOCK_UN))); | 73 ignore_result(HANDLE_EINTR(flock(file_lock_, LOCK_UN))); |
74 ignore_result(HANDLE_EINTR(close(file_lock_))); | 74 ignore_result(HANDLE_EINTR(close(file_lock_))); |
75 file_lock_ = -1; | 75 file_lock_ = -1; |
76 } | 76 } |
77 | 77 |
78 locking_thread_ = 0; | 78 locking_thread_ = 0; |
79 pthread_mutex_unlock(&recursive_lock_); | 79 pthread_mutex_unlock(&recursive_lock_); |
80 } | 80 } |
81 | 81 |
82 } // namespace rlz_lib | 82 } // namespace rlz_lib |
OLD | NEW |