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/*
* 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
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