//
// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// thread.c --
//
// Author           : Thierry Delisle
// Created On       : Tue Jan 17 12:27:26 2017
// Last Modified By : Peter A. Buhr
// Last Modified On : Wed Dec  4 09:17:49 2019
// Update Count     : 9
//

#define __cforall_thread__

#include "thread.hfa"

#include "kernel_private.hfa"

#define __CFA_INVOKE_PRIVATE__
#include "invoke.h"

extern "C" {
	#include <fenv.h>
	#include <stddef.h>
}

//extern volatile thread_local processor * this_processor;

//-----------------------------------------------------------------------------
// Thread ctors and dtors
void ?{}(thread_desc & this, const char * const name, cluster & cl, void * storage, size_t storageSize ) with( this ) {
	context{ 0p, 0p };
	self_cor{ name, storage, storageSize };
	state = Start;
	curr_cor = &self_cor;
	self_mon.owner = &this;
	self_mon.recursion = 1;
	self_mon_p = &self_mon;
	curr_cluster = &cl;
	next = 0p;

	node.next = 0p;
	node.prev = 0p;
	doregister(curr_cluster, this);

	monitors{ &self_mon_p, 1, (fptr_t)0 };
}

void ^?{}(thread_desc& this) with( this ) {
	unregister(curr_cluster, this);
	^self_cor{};
}

forall( dtype T | sized(T) | is_thread(T) | { void ?{}(T&); } )
void ?{}( scoped(T)& this ) with( this ) {
	handle{};
	__thrd_start(handle, main);
}

forall( dtype T, ttype P | sized(T) | is_thread(T) | { void ?{}(T&, P); } )
void ?{}( scoped(T)& this, P params ) with( this ) {
	handle{ params };
	__thrd_start(handle, main);
}

forall( dtype T | sized(T) | is_thread(T) )
void ^?{}( scoped(T)& this ) with( this ) {
	^handle{};
}

//-----------------------------------------------------------------------------
// Starting and stopping threads
forall( dtype T | is_thread(T) )
void __thrd_start( T & this, void (*main_p)(T &) ) {
	thread_desc * this_thrd = get_thread(this);

	disable_interrupts();
	CtxStart(main_p, get_coroutine(this), this, CtxInvokeThread);

	this_thrd->context.[SP, FP] = this_thrd->self_cor.context.[SP, FP];
	verify( this_thrd->context.SP );

	ScheduleThread(this_thrd);
	enable_interrupts( __cfaabi_dbg_ctx );
}

void yield( void ) {
	// Safety note : This could cause some false positives due to preemption
      verify( TL_GET( preemption_state.enabled ) );
	BlockInternal( TL_GET( this_thread ) );
	// Safety note : This could cause some false positives due to preemption
      verify( TL_GET( preemption_state.enabled ) );
}

void yield( unsigned times ) {
	for( unsigned i = 0; i < times; i++ ) {
		yield();
	}
}

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