diff options
Diffstat (limited to 'libappfuse')
-rw-r--r-- | libappfuse/Android.bp | 1 | ||||
-rw-r--r-- | libappfuse/EpollController.cc | 66 | ||||
-rw-r--r-- | libappfuse/include/libappfuse/EpollController.h | 50 |
3 files changed, 117 insertions, 0 deletions
diff --git a/libappfuse/Android.bp b/libappfuse/Android.bp index f729faf73..0d578144a 100644 --- a/libappfuse/Android.bp +++ b/libappfuse/Android.bp | |||
@@ -19,6 +19,7 @@ cc_library_shared { | |||
19 | "FuseAppLoop.cc", | 19 | "FuseAppLoop.cc", |
20 | "FuseBuffer.cc", | 20 | "FuseBuffer.cc", |
21 | "FuseBridgeLoop.cc", | 21 | "FuseBridgeLoop.cc", |
22 | "EpollController.cc", | ||
22 | ] | 23 | ] |
23 | } | 24 | } |
24 | 25 | ||
diff --git a/libappfuse/EpollController.cc b/libappfuse/EpollController.cc new file mode 100644 index 000000000..9daeab8f4 --- /dev/null +++ b/libappfuse/EpollController.cc | |||
@@ -0,0 +1,66 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2017 The Android Open Source Project | ||
3 | * | ||
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | ||
5 | * you may not use this file except in compliance with the License. | ||
6 | * You may obtain a copy of the License at | ||
7 | * | ||
8 | * http://www.apache.org/licenses/LICENSE-2.0 | ||
9 | * | ||
10 | * Unless required by applicable law or agreed to in writing, software | ||
11 | * distributed under the License is distributed on an "AS IS" BASIS, | ||
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
13 | * See the License for the specic language governing permissions and | ||
14 | * limitations under the License. | ||
15 | */ | ||
16 | |||
17 | #include <android-base/logging.h> | ||
18 | |||
19 | #include "libappfuse/EpollController.h" | ||
20 | |||
21 | namespace android { | ||
22 | namespace fuse { | ||
23 | |||
24 | EpollController::EpollController(base::unique_fd&& poll_fd) : poll_fd_(std::move(poll_fd)) { | ||
25 | } | ||
26 | |||
27 | bool EpollController::Wait(size_t event_count) { | ||
28 | events_.resize(event_count); | ||
29 | const int result = TEMP_FAILURE_RETRY(epoll_wait(poll_fd_, events_.data(), event_count, -1)); | ||
30 | if (result == -1) { | ||
31 | PLOG(ERROR) << "Failed to wait for epoll"; | ||
32 | return false; | ||
33 | } | ||
34 | events_.resize(result); | ||
35 | return true; | ||
36 | } | ||
37 | |||
38 | bool EpollController::AddFd(int fd, int events, void* data) { | ||
39 | return InvokeControl(EPOLL_CTL_ADD, fd, events, data); | ||
40 | } | ||
41 | |||
42 | bool EpollController::UpdateFd(int fd, int events, void* data) { | ||
43 | return InvokeControl(EPOLL_CTL_MOD, fd, events, data); | ||
44 | } | ||
45 | |||
46 | bool EpollController::RemoveFd(int fd) { | ||
47 | return InvokeControl(EPOLL_CTL_DEL, fd, /* events */ 0, nullptr); | ||
48 | } | ||
49 | |||
50 | const std::vector<epoll_event>& EpollController::events() const { | ||
51 | return events_; | ||
52 | } | ||
53 | |||
54 | bool EpollController::InvokeControl(int op, int fd, int events, void* data) const { | ||
55 | epoll_event event; | ||
56 | memset(&event, 0, sizeof(event)); | ||
57 | event.events = events; | ||
58 | event.data.ptr = data; | ||
59 | if (epoll_ctl(poll_fd_, op, fd, &event) == -1) { | ||
60 | PLOG(ERROR) << "epoll_ctl() error op=" << op; | ||
61 | return false; | ||
62 | } | ||
63 | return true; | ||
64 | } | ||
65 | } | ||
66 | } | ||
diff --git a/libappfuse/include/libappfuse/EpollController.h b/libappfuse/include/libappfuse/EpollController.h new file mode 100644 index 000000000..3863abae7 --- /dev/null +++ b/libappfuse/include/libappfuse/EpollController.h | |||
@@ -0,0 +1,50 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2017 The Android Open Source Project | ||
3 | * | ||
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | ||
5 | * you may not use this file except in compliance with the License. | ||
6 | * You may obtain a copy of the License at | ||
7 | * | ||
8 | * http://www.apache.org/licenses/LICENSE-2.0 | ||
9 | * | ||
10 | * Unless required by applicable law or agreed to in writing, software | ||
11 | * distributed under the License is distributed on an "AS IS" BASIS, | ||
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
13 | * See the License for the specic language governing permissions and | ||
14 | * limitations under the License. | ||
15 | */ | ||
16 | |||
17 | #ifndef ANDROID_LIBAPPFUSE_EPOLLCONTROLLER_H_ | ||
18 | #define ANDROID_LIBAPPFUSE_EPOLLCONTROLLER_H_ | ||
19 | |||
20 | #include <sys/epoll.h> | ||
21 | |||
22 | #include <vector> | ||
23 | |||
24 | #include <android-base/macros.h> | ||
25 | #include <android-base/unique_fd.h> | ||
26 | |||
27 | namespace android { | ||
28 | namespace fuse { | ||
29 | |||
30 | class EpollController { | ||
31 | public: | ||
32 | explicit EpollController(base::unique_fd&& poll_fd); | ||
33 | bool Wait(size_t event_count); | ||
34 | bool AddFd(int fd, int events, void* data); | ||
35 | bool UpdateFd(int fd, int events, void* data); | ||
36 | bool RemoveFd(int fd); | ||
37 | |||
38 | const std::vector<epoll_event>& events() const; | ||
39 | |||
40 | private: | ||
41 | bool InvokeControl(int op, int fd, int events, void* data) const; | ||
42 | base::unique_fd poll_fd_; | ||
43 | std::vector<epoll_event> events_; | ||
44 | |||
45 | DISALLOW_COPY_AND_ASSIGN(EpollController); | ||
46 | }; | ||
47 | } | ||
48 | } | ||
49 | |||
50 | #endif // ANDROID_LIBAPPFUSE_EPOLLCONTROLLER_H_ | ||