source: src/libcfa/concurrency/alarm.c @ 7b13aeb

//                              -*- Mode: CFA -*-
//
// 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.
//
// alarm.c --
//
// Author           : Thierry Delisle
// Created On       : Fri Jun 2 11:31:25 2017
// Last Modified By : Thierry Delisle
// Last Modified On : --
// Update Count     : 0
//

#include "alarm.h"
#include "kernel_private.h"

static void register_self( alarm_node_t * this ) {
        lock( &systemProcessor->alarm_lock );
        insert( &systemProcessor->alarms, this );
        unlock( &systemProcessor->alarm_lock );
}

void ?{}( alarm_node_t * this, thread_desc * thrd, cfa_time_t alarm, cfa_time_t period = 0 ) {
        this->thrd = thrd;
        this->alarm = alarm;
        this->period = period;
        this->next = 0;

        register_self( this );
}

void ?{}( alarm_node_t * this, processor   * proc, cfa_time_t alarm, cfa_time_t period = 0 ) {
        this->proc = proc;
        this->alarm = alarm;
        this->period = period;
        this->next = 0;

        register_self( this );
}

static inline void insert_at( alarm_list_t * this, alarm_node_t * n, __alarm_it_t p ) {
        assert( !n->next );
        if( p == this->tail ) {
                this->tail = &n->next;
        }
        else {
                n->next = *p;
        }
        *p = n;
}

void insert( alarm_list_t * this, alarm_node_t * n ) {
        alarm_node_t ** it = &this->head;
        while( (*it) && (n->alarm > (*it)->alarm) ) {
                it = &(*it)->next;
        }

        insert_at( this, n, it );
}

void pop( alarm_list_t * this ) {
        alarm_node_t * head = this->head;
        if( head ) {
                this->head = head->next;
                if( !head->next ) {
                        this->tail = &this->head;
                }
                head->next = NULL;
        }
        return head;
}