今天完成了share memory的测试

今天在hcorr上完成了share memory的测试。 通过PCI驱动存取LTA数据并通过PGPLOT实时刷新显示。 工作流程：

include

#include<sys/types.h> #include<sys/ipc.h> #include<sys/shm.h>

create share memory

         shm_id = shmget(shm_key_id, SHM_BUF_SIZE, 0666|IPC_CREAT);          if (shm_id < 0) {                    perror("share memory error.");                    exit(1);          }          shm_data_buf= shmat(shm_id,0,1);

using share memory

         shm_id = shmget(shm_key_id, SHM_BUF_SIZE, 0666);          while (shm_id < 0) {                    printf("waiting the share memory content ...%d\r", j++);                    sleep(1);          }          shm_data_buf = shmat(shm_id, 0, 1);