init: Create classes for Action and Command
This creates the concept of 'event_trigger' vs 'property_trigger'
Previously these were merged into one, such that 'on property:a=b &&
property:b=c' is triggered when properties a=b and b=c as expected,
however combinations such as 'on early-boot && boot' would trigger
during both early-boot and boot. Similarly, 'on early-boot &&
property:a=b' would trigger on both early-boot and again when property
a equals b.
The event trigger distinction ensures that the first example fails to
parse and the second example only triggers on early-boot if
property a equals b.
This coalesces Actions with the same triggers into a single Action object
Change-Id: I8f661d96e8a2d40236f252301bfe10979d663ea6
diff --git a/init/action.h b/init/action.h
new file mode 100644
index 0000000..8ee09b0
--- /dev/null
+++ b/init/action.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2015 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 _INIT_ACTION_H
+#define _INIT_ACTION_H
+
+#include <map>
+#include <queue>
+#include <string>
+#include <vector>
+
+class Action {
+public:
+ Action();
+
+ void AddCommand(int (*f)(int nargs, char** args),
+ const std::vector<std::string>& args,
+ const std::string& filename = "", int line = 0);
+ bool InitTriggers(const std::vector<std::string>& args, std::string* err);
+ bool InitSingleTrigger(const std::string& trigger);
+ std::size_t NumCommands() const;
+ void ExecuteOneCommand(std::size_t command) const;
+ void ExecuteAllCommands() const;
+ bool CheckEventTrigger(const std::string& trigger) const;
+ bool CheckPropertyTrigger(const std::string& name,
+ const std::string& value) const;
+ bool TriggersEqual(const class Action& other) const;
+ std::string BuildTriggersString() const;
+ void DumpState() const;
+
+private:
+ class Command;
+
+ void ExecuteCommand(const Command& command) const;
+ bool CheckPropertyTriggers(const std::string& name = "",
+ const std::string& value = "") const;
+ bool ParsePropertyTrigger(const std::string& trigger, std::string* err);
+
+ std::map<std::string, std::string> property_triggers_;
+ std::string event_trigger_;
+ std::vector<Command*> commands_;
+};
+
+class ActionManager {
+public:
+ static ActionManager& GetInstance();
+ void QueueEventTrigger(const std::string& trigger);
+ void QueuePropertyTrigger(const std::string& name, const std::string& value);
+ void QueueAllPropertyTriggers();
+ void QueueBuiltinAction(int (*func)(int nargs, char** args),
+ const std::string& name);
+ void ExecuteOneCommand();
+ bool HasMoreCommands() const;
+ Action* AddNewAction(const std::vector<std::string>& triggers,
+ std::string* err);
+ void DumpState() const;
+
+private:
+ ActionManager();
+
+ ActionManager(ActionManager const&) = delete;
+ void operator=(ActionManager const&) = delete;
+
+ std::vector<Action*> action_list_;
+ std::queue<Action*> action_queue_;
+ std::size_t cur_command_;
+};
+
+#endif