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#include <stdint.h>
#include <string.h>
#include "banking.h"
#include "ipc.h"
#include "pa2345.h"
#include "dist.h"
void child_phase0( dist_info_t *info, uint8_t id ) {
close_redundant_pipes( info, id );
}
void child_phase1( dist_info_t *info, uint8_t id ) {
pid_t child_pid = getpid();
char buf[MAX_MESSAGE_LEN];
uint8_t i;
my_info_t me = {
.id = id,
.dist_info = info
};
int size = snprintf( buf, sizeof(buf), log_started_fmt, get_physical_time(),
id, child_pid,
info->parent_pid,
info->balances[ id ] );
Message msg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = size + 1,
.s_type = STARTED,
.s_local_time = get_physical_time()
}
};
fputs( buf, info->events_log );
fputs( buf, stdout );
strncpy( msg.s_payload, buf, sizeof( msg.s_payload ) );
send_multicast( &me, &msg );
for( i = 1; i <= info->x; i++ ) {
if( i == me.id )
continue;
if( !receive( &me, i, &msg ) ) {
if( msg.s_header.s_type != STARTED ) {
fprintf( stderr, "Message type INVALID (not STARTED)!\n" );
break;
}
}
}
snprintf( buf, sizeof(buf), log_received_all_started_fmt, get_physical_time(), id );
fputs( buf, info->events_log );
fputs( buf, stdout );
}
void child_phase2( dist_info_t *info, uint8_t id, BalanceHistory *history ) {
Message msg;
BalanceState balanceState;
char buf[MAX_MESSAGE_LEN];
my_info_t me = {
.id = id,
.dist_info = info
};
uint8_t i;
uint8_t last_order_time = 0;
balanceState.s_balance = info->balances[ id ];
balanceState.s_time = 0;
balanceState.s_balance_pending_in = 0;
history->s_history[ last_order_time ] = balanceState;
int running = 1;
while( running ) {
if( !receive_any( &me, &msg ) ) {
switch( msg.s_header.s_type ) {
case TRANSFER: {
TransferOrder *order = (TransferOrder *) msg.s_payload;
uint8_t cur_order_time = get_physical_time();
for( i = last_order_time + 1; i < cur_order_time; i++ ) {
balanceState.s_balance = info->balances[ id ];
balanceState.s_time = i;
balanceState.s_balance_pending_in = 0;
history->s_history[ i ] = balanceState;
}
if( order->s_src == id ) {
snprintf( buf, sizeof(buf), log_transfer_out_fmt,
get_physical_time(), order->s_src,
order->s_amount, order->s_dst );
fputs( buf, info->events_log );
fputs( buf, stdout );
info->balances[ id ] -= order->s_amount;
msg.s_header.s_local_time = get_physical_time();
send( &me, order->s_dst, &msg );
} else if( order->s_dst == id ) {
snprintf( buf, sizeof(buf), log_transfer_in_fmt,
get_physical_time(), order->s_dst,
order->s_amount, order->s_src);
fputs( buf, info->events_log );
fputs( buf, stdout );
Message stopMsg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = 0,
.s_type = ACK,
.s_local_time = get_physical_time()
}
};
info->balances[ id ] += order->s_amount;
send( &me, PARENT_ID, &stopMsg );
}
balanceState.s_balance = info->balances[ id ];
balanceState.s_time = cur_order_time;
balanceState.s_balance_pending_in = 0;
history->s_history[ cur_order_time ] = balanceState;
history->s_history_len = cur_order_time + 1;
last_order_time = cur_order_time;
break;
}
case STOP:
running = 0;
break;
}
}
}
}
void child_phase3( dist_info_t *info, uint8_t id, BalanceHistory *history ) {
char buf[MAX_MESSAGE_LEN];
uint8_t i;
my_info_t me = {
.id = id,
.dist_info = info
};
int size = snprintf( buf, sizeof(buf), log_done_fmt,
get_physical_time(), id,
info->balances[ id ] );
Message msg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = size + 1,
.s_type = DONE,
.s_local_time = get_physical_time()
}
};
fputs( buf, info->events_log );
fputs( buf, stdout );
strncpy( msg.s_payload, buf, sizeof( msg.s_payload ) );
send_multicast( &me, &msg );
for( i = 1; i <= info->x; i++ ) {
if( i == me.id )
continue;
if( !receive( &me, i, &msg ) ) {
if( msg.s_header.s_type != DONE ) {
fprintf( stderr, "Message type INVALID (not DONE)!\n" );
break;
}
}
}
snprintf( buf, sizeof(buf), log_received_all_done_fmt,
get_physical_time(), id );
fputs( buf, info->events_log );
fputs( buf, stdout );
int time = get_physical_time();
for( i = history->s_history_len; i <= time; i++ ) {
history->s_history[i].s_balance = history->s_history[ history->s_history_len - 1].s_balance;
history->s_history[i].s_time = i;
}
history->s_history_len = time+1;
int wr_size = history->s_history_len * sizeof(history->s_history[0]);
Message historyMsg = {
.s_header = {
.s_magic = MESSAGE_MAGIC,
.s_payload_len = wr_size,
.s_type = BALANCE_HISTORY,
.s_local_time = time
}
};
memcpy( historyMsg.s_payload, history, wr_size );
send( &me, PARENT_ID, &historyMsg );
}
void child_workflow( dist_info_t *info, uint8_t id ) {
BalanceHistory history = {
.s_id = id
};
/* CHILD PHASE 0: Close all redundant descriptors */
child_phase0(info, id);
/* CHILD PHASE 1: Send STARTED message for all, receive STARTED
* messages from other childs */
child_phase1(info, id);
/* CHILD PHASE 2: Do some useful work */
child_phase2(info, id, &history);
/* CHILD PHASE 3: Send DONE message for all, receive DONE messages from
* other childs and exit */
child_phase3(info, id, &history);
}
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