Created
September 3, 2023 03:19
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <fcntl.h> | |
#include <sys/mman.h> | |
#include <sys/stat.h> | |
#include <semaphore.h> | |
#define SHM_NAME "/my_shared_memory" | |
#define BUFFER_SIZE 1024 | |
int main() { | |
int shm_fd; | |
void *ptr; | |
sem_t *producer_sem, *consumer_sem; | |
// Create a shared memory object | |
shm_fd = shm_open(SHM_NAME, O_CREAT | O_RDWR, 0666); | |
ftruncate(shm_fd, BUFFER_SIZE); | |
ptr = mmap(0, BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0); | |
// Create semaphores | |
producer_sem = sem_open("/producer_sem", O_CREAT, 0666, 1); | |
consumer_sem = sem_open("/consumer_sem", O_CREAT, 0666, 0); | |
// Fork a child process | |
pid_t pid = fork(); | |
if (pid == 0) { | |
// Consumer process | |
while (1) { | |
sem_wait(consumer_sem); | |
printf("Consumer received: %s\n", (char *)ptr); | |
sem_post(producer_sem); | |
} | |
} else if (pid > 0) { | |
// Producer process | |
while (1) { | |
sem_wait(producer_sem); | |
printf("Enter data: "); | |
fgets((char *)ptr, BUFFER_SIZE, stdin); | |
sem_post(consumer_sem); | |
} | |
} else { | |
perror("Fork failed"); | |
return 1; | |
} | |
// Clean up | |
sem_close(producer_sem); | |
sem_close(consumer_sem); | |
shm_unlink(SHM_NAME); | |
return 0; | |
} |
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