#pragma once

#include <stdbool.h>

#include "bits/algorithm.hfa"
#include "bits/locks.hfa"
#include "bits/sequence.hfa"

#include "invoke.h"

#include "time_t.hfa"
#include "time.hfa"
#include <sys/time.h>
#include "alarm.hfa"

///////////////////////////////////////////////////////////////////
//// is_blocking_lock
///////////////////////////////////////////////////////////////////

trait is_blocking_lock(dtype L | sized(L)) {
	void on_notify( L &, struct $thread * );			// For synchronization locks to use when acquiring
	void on_wait( L & );    							// For synchronization locks to use when releasing
	size_t get_recursion_count( L & ); 					// to get recursion count for cond lock to reset after waking
	void set_recursion_count( L &, size_t recursion );	// to set recursion count after getting signalled;
};

///////////////////////////////////////////////////////////////////
//// info_thread
///////////////////////////////////////////////////////////////////

// the info thread is a wrapper around a thread used
// to store extra data for use in the condition variable
forall(dtype L | is_blocking_lock(L)) {
	struct info_thread {
		inline Seqable;					// used to put info_thread on a dl queue (aka sequence)
		struct $thread * t;				// waiting thread
		uintptr_t info;					// shadow field
		L * lock;						// lock that is passed to wait() (if one is passed)
		bool signalled;					// true when signalled and false when timeout wakes thread
	};


	void ?{}( info_thread(L) & this, $thread * t );
	void ?{}( info_thread(L) & this, $thread * t, uintptr_t info );
	void ^?{}( info_thread(L) & this );

	// for use by sequence
	info_thread(L) *& Back( info_thread(L) * this );
	info_thread(L) *& Next( info_thread(L) * this );
}

///////////////////////////////////////////////////////////////////
//// Blocking Locks
///////////////////////////////////////////////////////////////////

struct blocking_lock {
	// Spin lock used for mutual exclusion
	__spinlock_t lock;

	// List of blocked threads
	Sequence( $thread ) blocked_threads;

	// Count of current blocked threads
	size_t wait_count;

	// Flag if the lock allows multiple acquisition
	bool multi_acquisition;

	// Flag if lock can be released by non owner
	bool strict_owner;

	// Current thread owning the lock
	struct $thread * owner;

	// Number of recursion level
	size_t recursion_count;
};

struct single_acquisition_lock {
	inline blocking_lock;
};

struct owner_lock {
	inline blocking_lock;
};

struct multiple_acquisition_lock {
	inline blocking_lock;
};

void ?{}( blocking_lock & this, bool multi_acquisition, bool strict_owner );
void ^?{}( blocking_lock & this );

void ?{}( single_acquisition_lock & this );
void ^?{}( single_acquisition_lock & this );

void ?{}( owner_lock & this );
void ^?{}( owner_lock & this );

void ?{}( multiple_acquisition_lock & this );
void ^?{}( multiple_acquisition_lock & this );

void lock( blocking_lock & this );
bool try_lock( blocking_lock & this );
void unlock( blocking_lock & this );
void on_notify( blocking_lock & this, struct $thread * t );
void on_wait( blocking_lock & this );
size_t wait_count( blocking_lock & this );
void set_recursion_count( blocking_lock & this, size_t recursion );
size_t get_recursion_count( blocking_lock & this );

void lock( single_acquisition_lock & this );
void unlock( single_acquisition_lock & this );
void on_notify( single_acquisition_lock & this, struct $thread * t );
void on_wait( single_acquisition_lock & this );
void set_recursion_count( single_acquisition_lock & this, size_t recursion );
size_t get_recursion_count( single_acquisition_lock & this );

void lock( owner_lock & this );
void unlock( owner_lock & this );
void on_notify( owner_lock & this, struct $thread * t );
void on_wait( owner_lock & this );
void set_recursion_count( owner_lock & this, size_t recursion );
size_t get_recursion_count( owner_lock & this );

void lock( multiple_acquisition_lock & this );
void unlock( multiple_acquisition_lock & this );
void on_notify( multiple_acquisition_lock & this, struct $thread * t );
void on_wait( multiple_acquisition_lock & this );
void set_recursion_count( multiple_acquisition_lock & this, size_t recursion );
size_t get_recursion_count( multiple_acquisition_lock & this );

///////////////////////////////////////////////////////////////////
//// Synchronization Locks
///////////////////////////////////////////////////////////////////
forall(dtype L | is_blocking_lock(L)) {
	struct condition_variable {
		// Spin lock used for mutual exclusion
		__spinlock_t lock;

		// List of blocked threads
		Sequence( info_thread(L) ) blocked_threads;

		// Count of current blocked threads
		int count;
	};

	void ?{}( condition_variable(L) & this );
	void ^?{}( condition_variable(L) & this );

	struct alarm_node_wrap {
		alarm_node_t alarm_node;

		condition_variable(L) * cond;

		info_thread(L) * i;
	};

	void ?{}( alarm_node_wrap(L) & this, Time alarm, Duration period, Alarm_Callback callback );
	void ^?{}( alarm_node_wrap(L) & this );

	void alarm_node_callback( alarm_node_wrap(L) & this );

	void alarm_node_wrap_cast( alarm_node_t & a );

	bool notify_one( condition_variable(L) & this );
	bool notify_all( condition_variable(L) & this );

	uintptr_t front( condition_variable(L) & this );

	bool empty( condition_variable(L) & this );
	int counter( condition_variable(L) & this );

	void wait( condition_variable(L) & this );
	void wait( condition_variable(L) & this, uintptr_t info );
	bool wait( condition_variable(L) & this, Duration duration );
	bool wait( condition_variable(L) & this, uintptr_t info, Duration duration );
	bool wait( condition_variable(L) & this, Time time );
	bool wait( condition_variable(L) & this, uintptr_t info, Time time );

	void wait( condition_variable(L) & this, L & l );
	void wait( condition_variable(L) & this, L & l, uintptr_t info );
	bool wait( condition_variable(L) & this, L & l, Duration duration );
	bool wait( condition_variable(L) & this, L & l, uintptr_t info, Duration duration );
	bool wait( condition_variable(L) & this, L & l, Time time );
	bool wait( condition_variable(L) & this, L & l, uintptr_t info, Time time );
}