summaryrefslogtreecommitdiffstats
path: root/gnss/1.0-legacy/ThreadCreationWrapper.h
diff options
context:
space:
mode:
Diffstat (limited to 'gnss/1.0-legacy/ThreadCreationWrapper.h')
-rw-r--r--gnss/1.0-legacy/ThreadCreationWrapper.h58
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