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Diffstat (limited to 'gnss/1.0-legacy/ThreadCreationWrapper.h')
-rw-r--r-- | gnss/1.0-legacy/ThreadCreationWrapper.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/gnss/1.0-legacy/ThreadCreationWrapper.h b/gnss/1.0-legacy/ThreadCreationWrapper.h new file mode 100644 index 0000000..f401ce2 --- /dev/null +++ b/gnss/1.0-legacy/ThreadCreationWrapper.h @@ -0,0 +1,58 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_HARDWARE_GNSS_THREADCREATIONWRAPPER_H +#define ANDROID_HARDWARE_GNSS_THREADCREATIONWRAPPER_H + +#include <log/log.h> +#include <pthread.h> +#include <vector> + +typedef void (*threadEntryFunc)(void* ret); + +/* + * This class facilitates createThreadCb methods in various GNSS interfaces to wrap + * pthread_create() from libc since its function signature differs from what is required by the + * conventional GNSS HAL. The arguments passed to pthread_create() need to be on heap and not on + * the stack of createThreadCb. + */ +struct ThreadFuncArgs { + ThreadFuncArgs(void (*start)(void*), void* arg) : fptr(start), args(arg) {} + + /* pointer to the function of type void()(void*) that needs to be wrapped */ + threadEntryFunc fptr; + /* argument for fptr to be called with */ + void* args; +}; + +/* + * This method is simply a wrapper. It is required since pthread_create() requires an entry + * function pointer of type void*()(void*) and the GNSS hal requires as input a function pointer of + * type void()(void*). + */ +void* threadFunc(void* arg); + +/* + * This method is called by createThreadCb with a pointer to the vector that + * holds the pointers to the thread arguments. The arg and start parameters are + * first used to create a ThreadFuncArgs object which is then saved in the + * listArgs parameters. The created ThreadFuncArgs object is then used to invoke + * threadFunc() method which in-turn invokes pthread_create. + */ +pthread_t createPthread(const char* name, void (*start)(void*), void* arg, + std::vector<std::unique_ptr<ThreadFuncArgs>> * listArgs); + +#endif |