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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <immintrin.h>
#include <assert.h>
enum thrd_ids {
AGENT_A = 0,
AGENT_B,
AGENT_C,
SMOKER_T,
SMOKER_P,
SMOKER_M,
THRD_MAX
};
static pthread_t thrds[THRD_MAX];
/* memory shared by all threads */
/* only atomic operations are allowed */
static unsigned int agent_tasks = 0;
static unsigned int tobacco = 0;
static unsigned int paper = 0;
static unsigned int match = 0;
static void *agenta_thread(void *args)
{
while (1) {
__transaction_atomic {
if (agent_tasks > 0) {
agent_tasks--;
tobacco++; paper++;
}
}
printf("AGENT_A: +1 TOBACCO , +1 PAPER\n");
sleep( random() % 5 );
}
return NULL;
}
static void *agentb_thread(void *args)
{
while (1) {
__transaction_atomic {
if (agent_tasks > 0) {
agent_tasks--;
paper++; match++;
}
}
printf("AGENT_B: +1 PAPER, +1 MATCH\n");
sleep( random() % 5 );
}
return NULL;
}
static void *agentc_thread(void *args)
{
while (1) {
__transaction_atomic {
if (agent_tasks > 0) {
agent_tasks--;
tobacco++; match++;
}
}
printf("AGENT_C: +1 TOBACCO, +1 MATCH\n");
sleep( random() % 5 );
}
return NULL;
}
static void *smokerm_thread(void *args)
{
while (1) {
__transaction_atomic {
if (tobacco > 0 && paper > 0) {
agent_tasks++;
tobacco--; paper--;
}
}
printf("SMOKER_M: -1 TOBACCO, -1 PAPER\n");
sleep( random() % 5 );
}
return NULL;
}
static void *smokert_thread(void *args)
{
while (1) {
__transaction_atomic {
if (paper > 0 && match > 0) {
agent_tasks++;
paper--; match--;
}
}
printf("SMOKER_T: -1 PAPER, -1 MATCH\n");
sleep( random() % 5 );
}
return NULL;
}
static void *smokerp_thread(void *args)
{
while (1) {
__transaction_atomic {
if (tobacco > 0 && match > 0) {
agent_tasks++;
tobacco--; match--;
}
}
printf("SMOKER_P: -1 TOBACCO, -1 MATCH\n");
sleep( random() % 5 );
}
return NULL;
}
int
main(int argc, char *argv[])
{
assert( pthread_create(&thrds[AGENT_A], NULL, agenta_thread, NULL) == 0 );
assert( pthread_create(&thrds[AGENT_B], NULL, agentb_thread, NULL) == 0 );
assert( pthread_create(&thrds[AGENT_C], NULL, agentc_thread, NULL) == 0 );
assert( pthread_create(&thrds[SMOKER_M], NULL, smokerm_thread, NULL) == 0 );
assert( pthread_create(&thrds[SMOKER_T], NULL, smokert_thread, NULL) == 0 );
assert( pthread_create(&thrds[SMOKER_P], NULL, smokerp_thread, NULL) == 0 );
while (1) {
unsigned char succ = 0;
unsigned int t_tasks, t_tobacco, t_paper, t_match;
sleep(1);
__transaction_atomic {
t_tasks = agent_tasks;
t_tobacco = tobacco;
t_paper = paper;
t_match = match;
succ = 1;
}
if (succ == 1) {
printf("*** STATUS: %u agent_tasks , %u tobacco , %u paper , %u matches\n", t_tasks, t_tobacco, t_paper, t_match);
} else {
printf("*** ATOMIC OPERATIONS NOT EXECUTED ***\n");
}
}
return 0;
}
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