線程間通信：

#include // printf

#include // exit

#include // pipe

#include // strlen

#include // pthread_create

using namespace std;

void *func(void * fd)

{

printf("write fd = %d\n", *(int*)fd);

char str[] = "hello everyone!";

write( *(int*)fd, str, strlen(str) );

}

int main()

{

int fd[2];

char readbuf[1024];

if(pipe(fd) < 0)

{

printf("pipe error!\n");

}

// create a new thread

pthread_t tid = 0;

pthread_create(&tid, NULL, func, &fd[1]);

pthread_join(tid, NULL);

sleep(3);

// read buf from child thread

read( fd[0], readbuf, sizeof(readbuf) );

printf("read buf = %s\n", readbuf);

return 0;

}

// 輸出結果

write fd = 4

read buf = hello everyone!�

進程間通信：

#include // printf

#include // exit

#include // pipe

#include // strlen

#include // pthread_create

using namespace std;

int main()

{

int fd[2];

int pid = 0;

char str[] = "hello";

char readbuf[1024];

if(pipe(fd) < 0)

{

printf("pipe error!\n");

}

if((pid = fork()) < 0)

{

printf("fork error!\n");

}

else if(pid == 0)

{

printf("child process!\n");

// close read channel

close(fd[0]);

write(fd[1], str, strlen(str));

}

else

{

printf("father process!\n");

// close write channel

close(fd[1]);

read(fd[0], readbuf, sizeof(readbuf));

printf("readbuf = %s\n", readbuf);

}

return 0;

}

// 輸出結果：

father process!

child process!

readbuf = hello

總結

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