100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
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#include <stdio.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "MESA_shm_ring_queue.h"
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void init_ring_queue_head_arrray(struct MESA_shm_overview *ovw, struct MESA_shm_queue_head **ring_queue_head)
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{
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int i = 0;
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struct MESA_shm_overview *tmp_ovw = NULL;
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for(i = 0; i< MESA_SHM_RING_QUEUE_NUM; i++){
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tmp_ovw = ovw + i;
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if(tmp_ovw->shmid == -1){
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break;
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}
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ring_queue_head[i] = shmat(tmp_ovw->shmid, NULL, 0);
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}
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return ;
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}
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void consumer_daemo()
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{
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int fd = -1;
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switch (fork()) {
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case -1:
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printf("fork error\n");
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return ;
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case 0:
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break;
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default:
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exit(0);
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}
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if (setsid() == -1) {
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return ;
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}
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umask(0);
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fd = open("/dev/null", O_RDWR);
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if (fd == -1) {
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return ;
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}
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if (dup2(fd, STDIN_FILENO) == -1) {
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return ;
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}
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if (dup2(fd, STDOUT_FILENO) == -1) {
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return ;
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}
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if (fd > STDERR_FILENO) {
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if (close(fd) == -1) {
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return ;
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}
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}
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return ;
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}
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int main(int argc, char **args)
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{
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consumer_daemo();
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int i = 0;
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struct MESA_shm_overview *shm_overview = NULL;
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struct MESA_shm_overview *tmp_ovw = NULL;
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struct MESA_shm_queue_head *ring_queue_head[MESA_SHM_RING_QUEUE_NUM] = {NULL};
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int log_file_fd = -1;
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shm_overview = MESA_shm_alloc_overview();
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if(shm_overview == NULL){
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return 0;
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}
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init_ring_queue_head_arrray(shm_overview, ring_queue_head);
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log_file_fd = open("/root/MESA_log", O_RDWR | O_CREAT | O_APPEND, 0666);
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if(log_file_fd < 0){
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return 0;
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}
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while(1){
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for(i = 0; i< MESA_SHM_RING_QUEUE_NUM; i++){
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tmp_ovw = shm_overview + i;
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if(tmp_ovw->shmid == -1){
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break;
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}
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if(ring_queue_head[i] == NULL){
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ring_queue_head[i] = shmat(tmp_ovw->shmid, NULL, 0);
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if(ring_queue_head[i] == NULL){
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break ;
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}
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}
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if(tmp_ovw->status == MESA_SHM_RING_QUEUE_USED || tmp_ovw->status == MESA_SHM_RING_QUEUE_HALF_IDLE){
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MESA_shm_write_ring_queue_to_file(log_file_fd, ring_queue_head[i]);
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if(tmp_ovw->status == MESA_SHM_RING_QUEUE_HALF_IDLE){
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tmp_ovw->status = MESA_SHM_RING_QUEUE_IDLE;
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}
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}
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}
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usleep(5000);
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}
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return 0;
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}
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