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/*
Minetest
Copyright (C) 2018 nerzhul, Loic Blot <loic.blot@unix-experience.fr>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include "content/mod_configuration.h"
#include <memory>

class MetricsBackend;
class MetricCounter;
class ServerScripting;

/**
 * Manage server mods
 *
 * All new calls to this class must be tested in test_servermodmanager.cpp
 */
class ServerModManager
{
	ModConfiguration configuration;

public:
	/**
	 * Creates a ServerModManager which targets worldpath
	 * @param worldpath
	 */
	ServerModManager(const std::string &worldpath);
	void loadMods(ServerScripting *script);
	const ModSpec *getModSpec(const std::string &modname) const;
	void getModNames(std::vector<std::string> &modlist) const;

	inline const std::vector<ModSpec> &getMods() const {
		return configuration.getMods();
	}

	inline const std::vector<ModSpec> &getUnsatisfiedMods() const {
		return configuration.getUnsatisfiedMods();
	}

	inline bool isConsistent() const {
		return configuration.isConsistent();
	}

	inline void printUnsatisfiedModsError() const {
		return configuration.printUnsatisfiedModsError();
	}

	/**
	 * Recursively gets all paths of mod folders that can contain media files.
	 *
	 * Result is ordered in descending priority, ie. files from an earlier path
	 * should not be replaced by files from a latter one.
	 *
	 * @param paths result vector
	 */
	void getModsMediaPaths(std::vector<std::string> &paths) const;
};
kwb">void testAtomicSemaphoreThread(); }; static TestThreading g_test_instance; void TestThreading::runTests(IGameDef *gamedef) { TEST(testStartStopWait); TEST(testThreadKill); TEST(testAtomicSemaphoreThread); } class SimpleTestThread : public Thread { public: SimpleTestThread(unsigned int interval) : Thread("SimpleTest"), m_interval(interval) { } private: void *run() { void *retval = this; if (isCurrentThread() == false) retval = (void *)0xBAD; while (!stopRequested()) sleep_ms(m_interval); return retval; } unsigned int m_interval; }; void TestThreading::testStartStopWait() { void *thread_retval; SimpleTestThread *thread = new SimpleTestThread(25); // Try this a couple times, since a Thread should be reusable after waiting for (size_t i = 0; i != 5; i++) { // Can't wait() on a joined, stopped thread UASSERT(thread->wait() == false); // start() should work the first time, but not the second. UASSERT(thread->start() == true); UASSERT(thread->start() == false); UASSERT(thread->isRunning() == true); UASSERT(thread->isCurrentThread() == false); // Let it loop a few times... sleep_ms(70); // It's still running, so the return value shouldn't be available to us. UASSERT(thread->getReturnValue(&thread_retval) == false); // stop() should always succeed UASSERT(thread->stop() == true); // wait() only needs to wait the first time - the other two are no-ops. UASSERT(thread->wait() == true); UASSERT(thread->wait() == false); UASSERT(thread->wait() == false); // Now that the thread is stopped, we should be able to get the // return value, and it should be the object itself. thread_retval = NULL; UASSERT(thread->getReturnValue(&thread_retval) == true); UASSERT(thread_retval == thread); } delete thread; } void TestThreading::testThreadKill() { SimpleTestThread *thread = new SimpleTestThread(300); UASSERT(thread->start() == true); // kill()ing is quite violent, so let's make sure our victim is sleeping // before we do this... so we don't corrupt the rest of the program's state sleep_ms(100); UASSERT(thread->kill() == true); // The state of the thread object should be reset if all went well UASSERT(thread->isRunning() == false); UASSERT(thread->start() == true); UASSERT(thread->stop() == true); UASSERT(thread->wait() == true); // kill() after already waiting should fail. UASSERT(thread->kill() == false); delete thread; } class AtomicTestThread : public Thread { public: AtomicTestThread(std::atomic<u32> &v, Semaphore &trigger) : Thread("AtomicTest"), val(v), trigger(trigger) { } private: void *run() { trigger.wait(); for (u32 i = 0; i < 0x10000; ++i) ++val; return NULL; } std::atomic<u32> &val; Semaphore &trigger; }; void TestThreading::testAtomicSemaphoreThread() { std::atomic<u32> val; val = 0; Semaphore trigger; static const u8 num_threads = 4; AtomicTestThread *threads[num_threads]; for (auto &thread : threads) { thread = new AtomicTestThread(val, trigger); UASSERT(thread->start()); } trigger.post(num_threads); for (AtomicTestThread *thread : threads) { thread->wait(); delete thread; } UASSERT(val == num_threads * 0x10000); }