容儿碰了大盘的G点?# Stock
t*r
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You have two threads one printing even numbers in order and other odd
numbers. Design an algorithm so that it prints numbers in natural order
#include
#include
pthread_mutex_t mlock=PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond=PTHREAD_COND_INITIALIZER;
int flag=0;
void *EVEN(void *param);
void *ODD(void *param);
int main()
{
pthread_t etid,otid;
pthread_create(&etid,NULL,EVEN,NULL);
pthread_create(&otid,NULL,ODD,NULL);
pthread_exit(NULL);
}
void *EVEN(void *param)
{
int x=0;
int i;
for(i=0;i<20;i++)
{
pthread_mutex_lock(&mlock);
if(flag==1)
pthread_cond_wait(&cond,&mlock);
printf("%d ",x);
x=x+2;
flag=1;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mlock);
}
}
void *ODD(void *param)
{
int x=1;
int i;
for(i=0;i<20;i++)
{
pthread_mutex_lock(&mlock);
if(flag==0)
pthread_cond_wait(&cond,&mlock);
printf("%d ",x);
x=x+2;
flag=0;
pthread_mutex_unlock(&mlock);
pthread_cond_signal(&cond);
}
numbers. Design an algorithm so that it prints numbers in natural order
#include
#include
pthread_mutex_t mlock=PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond=PTHREAD_COND_INITIALIZER;
int flag=0;
void *EVEN(void *param);
void *ODD(void *param);
int main()
{
pthread_t etid,otid;
pthread_create(&etid,NULL,EVEN,NULL);
pthread_create(&otid,NULL,ODD,NULL);
pthread_exit(NULL);
}
void *EVEN(void *param)
{
int x=0;
int i;
for(i=0;i<20;i++)
{
pthread_mutex_lock(&mlock);
if(flag==1)
pthread_cond_wait(&cond,&mlock);
printf("%d ",x);
x=x+2;
flag=1;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mlock);
}
}
void *ODD(void *param)
{
int x=1;
int i;
for(i=0;i<20;i++)
{
pthread_mutex_lock(&mlock);
if(flag==0)
pthread_cond_wait(&cond,&mlock);
printf("%d ",x);
x=x+2;
flag=0;
pthread_mutex_unlock(&mlock);
pthread_cond_signal(&cond);
}
