Merge "Add InputChannel::waitForMessage and use it in EndToEndNativeInputTest" into main
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index 750e170..2d64872 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -290,6 +290,17 @@
*/
bool probablyHasInput() const;
+ /* Wait until there is a message in the channel.
+ *
+ * The |timeout| specifies how long to block waiting for an input event to appear. Negative
+ * values are not allowed.
+ *
+ * In some cases returning before timeout expiration can happen without a message available.
+ * This could happen after the channel was closed on the other side. Another possible reason
+ * is incorrect setup of the channel.
+ */
+ void waitForMessage(std::chrono::milliseconds timeout) const;
+
/* Return a new object that has a duplicate of this channel's fd. */
std::unique_ptr<InputChannel> dup() const;
diff --git a/libs/gui/tests/EndToEndNativeInputTest.cpp b/libs/gui/tests/EndToEndNativeInputTest.cpp
index d4b8dbe..b9ab803 100644
--- a/libs/gui/tests/EndToEndNativeInputTest.cpp
+++ b/libs/gui/tests/EndToEndNativeInputTest.cpp
@@ -168,8 +168,8 @@
return std::make_unique<InputSurface>(surfaceControl, width, height);
}
- InputEvent *consumeEvent(int timeoutMs = 3000) {
- waitForEventAvailable(timeoutMs);
+ InputEvent* consumeEvent(std::chrono::milliseconds timeout = 3000ms) {
+ mClientChannel->waitForMessage(timeout);
InputEvent *ev;
uint32_t seqId;
@@ -302,15 +302,6 @@
t.apply(true);
}
-private:
- void waitForEventAvailable(int timeoutMs) {
- struct pollfd fd;
-
- fd.fd = mClientChannel->getFd();
- fd.events = POLLIN;
- poll(&fd, 1, timeoutMs);
- }
-
public:
sp<SurfaceControl> mSurfaceControl;
std::shared_ptr<InputChannel> mClientChannel;
@@ -615,7 +606,7 @@
// A tap within the surface but outside the touchable region should not be sent to the surface.
injectTap(20, 30);
- EXPECT_EQ(surface->consumeEvent(200 /*timeoutMs*/), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/200ms), nullptr);
injectTap(31, 52);
surface->expectTap(20, 30);
@@ -981,12 +972,12 @@
obscuringSurface->mInputInfo.ownerUid = gui::Uid{22222};
obscuringSurface->showAt(100, 100);
injectTap(101, 101);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus();
surface->assertFocusChange(true);
injectKey(AKEYCODE_V);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, strict_unobscured_input_partially_obscured_window) {
@@ -1002,12 +993,12 @@
injectTap(101, 101);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus();
surface->assertFocusChange(true);
injectKey(AKEYCODE_V);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, strict_unobscured_input_alpha_window) {
@@ -1024,12 +1015,12 @@
injectTap(101, 101);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus();
surface->assertFocusChange(true);
injectKey(AKEYCODE_V);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, strict_unobscured_input_cropped_window) {
@@ -1046,12 +1037,12 @@
injectTap(111, 111);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus();
surface->assertFocusChange(true);
injectKey(AKEYCODE_V);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, ignore_touch_region_with_zero_sized_blast) {
@@ -1076,12 +1067,12 @@
injectTap(101, 101);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus();
surface->assertFocusChange(true);
injectKey(AKEYCODE_V);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, layer_with_valid_crop_can_be_focused) {
@@ -1116,7 +1107,7 @@
// Does not receive events outside its crop
injectTap(26, 26);
- EXPECT_EQ(containerSurface->consumeEvent(100), nullptr);
+ EXPECT_EQ(containerSurface->consumeEvent(/*timeout=*/100ms), nullptr);
}
/**
@@ -1141,7 +1132,7 @@
// Does not receive events outside parent bounds
injectTap(31, 31);
- EXPECT_EQ(containerSurface->consumeEvent(100), nullptr);
+ EXPECT_EQ(containerSurface->consumeEvent(/*timeout=*/100ms), nullptr);
}
/**
@@ -1167,7 +1158,7 @@
// Does not receive events outside crop layer bounds
injectTap(21, 21);
injectTap(71, 71);
- EXPECT_EQ(containerSurface->consumeEvent(100), nullptr);
+ EXPECT_EQ(containerSurface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(InputSurfacesTest, child_container_with_no_input_channel_blocks_parent) {
@@ -1184,7 +1175,7 @@
[&](auto &t, auto &sc) { t.reparent(sc, parent->mSurfaceControl); });
injectTap(101, 101);
- EXPECT_EQ(parent->consumeEvent(100), nullptr);
+ EXPECT_EQ(parent->consumeEvent(/*timeout=*/100ms), nullptr);
}
class MultiDisplayTests : public InputSurfacesTest {
@@ -1233,7 +1224,7 @@
// Touches should be dropped if the layer is on an invalid display.
injectTapOnDisplay(101, 101, layerStack.id);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
// However, we still let the window be focused and receive keys.
surface->requestFocus(layerStack.id);
@@ -1271,12 +1262,12 @@
injectTapOnDisplay(101, 101, layerStack.id);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
surface->requestFocus(layerStack.id);
surface->assertFocusChange(true);
injectKeyOnDisplay(AKEYCODE_V, layerStack.id);
- EXPECT_EQ(surface->consumeEvent(100), nullptr);
+ EXPECT_EQ(surface->consumeEvent(/*timeout=*/100ms), nullptr);
}
TEST_F(MultiDisplayTests, dont_drop_input_for_secure_layer_on_secure_display) {
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index fa094df..37de00c 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -521,11 +521,11 @@
bool InputChannel::probablyHasInput() const {
struct pollfd pfds = {.fd = mFd, .events = POLLIN};
if (::poll(&pfds, /*nfds=*/1, /*timeout=*/0) <= 0) {
- // This can be a false negative because EAGAIN and ENOMEM are not handled. The latter should
- // be extremely rare. The EAGAIN is also unlikely because it happens only when the signal
- // arrives while the syscall is executed, and the syscall is quick. Hitting EAGAIN too often
+ // This can be a false negative because EINTR and ENOMEM are not handled. The latter should
+ // be extremely rare. The EINTR is also unlikely because it happens only when the signal
+ // arrives while the syscall is executed, and the syscall is quick. Hitting EINTR too often
// would be a sign of having too many signals, which is a bigger performance problem. A
- // common tradition is to repeat the syscall on each EAGAIN, but it is not necessary here.
+ // common tradition is to repeat the syscall on each EINTR, but it is not necessary here.
// In other words, the missing one liner is replaced by a multiline explanation.
return false;
}
@@ -534,6 +534,22 @@
return (pfds.revents & POLLIN) != 0;
}
+void InputChannel::waitForMessage(std::chrono::milliseconds timeout) const {
+ if (timeout < 0ms) {
+ LOG(FATAL) << "Timeout cannot be negative, received " << timeout.count();
+ }
+ struct pollfd pfds = {.fd = mFd, .events = POLLIN};
+ int ret;
+ std::chrono::time_point<std::chrono::steady_clock> stopTime =
+ std::chrono::steady_clock::now() + timeout;
+ std::chrono::milliseconds remaining = timeout;
+ do {
+ ret = ::poll(&pfds, /*nfds=*/1, /*timeout=*/remaining.count());
+ remaining = std::chrono::duration_cast<std::chrono::milliseconds>(
+ stopTime - std::chrono::steady_clock::now());
+ } while (ret == -1 && errno == EINTR && remaining > 0ms);
+}
+
std::unique_ptr<InputChannel> InputChannel::dup() const {
base::unique_fd newFd(dupFd());
return InputChannel::create(getName(), std::move(newFd), getConnectionToken());