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#include "pa2345.h"
#include "queue.h"
#include "dist.h"
#include "lamport.h"
// TODO: remove global variable
queue_t q = {
.front = NULL,
.rear = NULL
};
int request_cs(const void * self) {
my_info_t *me = (my_info_t *) self;
//fprintf( stderr, "REQUEST_CS: Process %d sent message\n", me->id );
node_t *a;
int replied = 0;
int msg_author = 0;
lamport_increase( &gl_lamport_time );
Message msg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = 0,
.s_type = CS_REQUEST,
.s_local_time = get_lamport_time()
}
};
send_multicast( me, &msg );
//fprintf( stderr, "ENQUEUE: Process %d adding to queue\n", me->id );
enqueue( &q, me->id, get_lamport_time() );
while( replied < (me->dist_info->workers - 1) || ((a = front(&q)) && a->id != me->id )) {
//fprintf( stderr, "\n\n\nIN CYCLE: Process %d\n (replied = %d, workers = %d)\n\n\n", me->id, replied, me->dist_info->workers-1 );
if( !receive_any( me, &msg ) ) {
//fprintf( stderr, "RECEIVE_ANY: Process %d\n", me->id );
lamport_message_handler( &gl_lamport_time, msg.s_header.s_local_time );
msg_author = me->msg_author;
switch( msg.s_header.s_type ) {
case CS_REQUEST:
//fprintf( stderr, "CS_REQUEST: Process %d received message from %d\n", me->id, msg_author );
enqueue( &q, msg_author, msg.s_header.s_local_time );
lamport_increase( &gl_lamport_time );
msg.s_header.s_type = CS_REPLY;
msg.s_header.s_local_time = get_lamport_time();
send( me, msg_author, &msg );
break;
case CS_REPLY:
//fprintf( stderr, "\n\n CS_REPLY: Process %d received message from %d\n \n\n", me->id, msg_author );
replied++;
break;
case CS_RELEASE:
//fprintf( stderr, "CS_RELEASE: Process %d received message from %d\n", me->id, msg_author );
dequeue( &q );
break;
case DONE:
//fprintf( stderr, "DONE: Process %d received message from %d\n", me->id, msg_author );
me->dist_info->workers--;
break;
}
}
}
return 0;
}
int release_cs(const void * self) {
my_info_t *me = (my_info_t *) self;
dequeue( &q );
lamport_increase( &gl_lamport_time );
Message msg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = 0,
.s_type = CS_RELEASE,
.s_local_time = get_lamport_time()
}
};
send_multicast( me, &msg );
return 0;
}
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