47 lines
825 B
C
47 lines
825 B
C
// 生产者
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/shm.h>
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#include <unistd.h>
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typedef struct data
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{
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char data[32];
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int flag;
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} Data;
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int main()
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{
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printf("producer\n");
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key_t key = ftok("/", 15);
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if (key == -1)
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{
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perror("ftok");
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return 1;
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}
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int shmid = shmget(key, sizeof(Data), IPC_CREAT | 0666);
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if (shmid == -1)
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{
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perror("shmget");
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return 1;
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}
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Data *data_buf = (Data *)shmat(shmid, NULL, 0);
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if (data_buf == (Data *)-1)
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{
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perror("shmat");
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return 1;
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}
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int num = 0;
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while (1)
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{
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while (data_buf->flag == 1)
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;
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sprintf(data_buf->data, "hello, %d", num++);
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data_buf->flag = 1;
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printf("write data: %s\n", data_buf->data);
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}
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return 0;
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} |