2 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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 specific language governing permissions and
14 * limitations under the License.
19 #include <dali/internal/system/common/trigger-event.h>
22 #include <sys/eventfd.h>
25 #include <dali/integration-api/debug.h>
28 #include <dali/internal/system/common/file-descriptor-monitor.h>
29 #include <dali/internal/system/common/system-factory.h>
37 TriggerEvent::TriggerEvent(CallbackBase* callback, TriggerEventInterface::Options options)
38 : mFileDescriptorMonitor(),
43 // Create accompanying file descriptor.
44 mFileDescriptor = eventfd(0, EFD_NONBLOCK);
45 if(mFileDescriptor >= 0)
47 // Now Monitor the created event file descriptor
48 mFileDescriptorMonitor = Dali::Internal::Adaptor::GetSystemFactory()->CreateFileDescriptorMonitor(mFileDescriptor, MakeCallback(this, &TriggerEvent::Triggered), FileDescriptorMonitor::FD_READABLE);
52 DALI_LOG_ERROR("Unable to create TriggerEvent File descriptor\n");
56 TriggerEvent::~TriggerEvent()
60 if(mFileDescriptor >= 0)
62 close(mFileDescriptor);
67 void TriggerEvent::Trigger()
69 if(mFileDescriptor >= 0)
71 // Increment event counter by 1.
72 // Writing to the file descriptor triggers the Dispatch() method in the other thread
73 // (if in multi-threaded environment).
76 int size = write(mFileDescriptor, &data, sizeof(uint64_t));
78 if(size != sizeof(uint64_t))
80 DALI_LOG_ERROR("Unable to write to UpdateEvent File descriptor\n");
85 DALI_LOG_WARNING("Attempting to write to an invalid file descriptor\n");
89 void TriggerEvent::Triggered(FileDescriptorMonitor::EventType eventBitMask, int fileDescriptor)
91 if(!(eventBitMask & FileDescriptorMonitor::FD_READABLE))
93 DALI_ASSERT_ALWAYS(0 && "Trigger event file descriptor error");
97 // Reading from the file descriptor resets the event counter, we can ignore the count.
98 uint64_t receivedData;
100 size = read(mFileDescriptor, &receivedData, sizeof(uint64_t));
101 if(size != sizeof(uint64_t))
103 DALI_LOG_WARNING("Unable to read to UpdateEvent File descriptor\n");
106 // Save value to prevent duplicate deletion
107 TriggerEventInterface::Options options = mOptions;
109 // Call the connected callback
110 CallbackBase::Execute(*mCallback);
112 //check if we should delete ourselves after the trigger
113 if(options == TriggerEventInterface::DELETE_AFTER_TRIGGER)
119 } // namespace Adaptor
121 } // namespace Internal