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mesa-framework-mesa-handle-…/inc/MESA_shm_ring_queue.h
guo_peixu 8267c9712e 修改生产者和消费者都退出后,共享内存未删除的问题
生产者消费者注册信号处理函数,退出时检查如果没有其它进程使用共享内存,将共享内存删除
2022-06-30 15:16:08 +08:00

67 lines
1.7 KiB
C

#ifndef _MESA_SHM_RING_QUEUE_H_
#define _MESA_SHM_RING_QUEUE_H_
#include <pthread.h>
#define MESA_SHM_LOG_PATH_LEN 1024
#define MESA_SHM_RING_QUEUE_NUM 128
#define MESA_SHM_RING_QUEUE_BLOCK_NUM 8192
#define MESA_SHM_RING_QUEUE_BLOCK_SIZE 4096
#define MESA_SHM_KEY_OVERVIEW 35720
#define MESA_SHM_KEY_MIN (MESA_SHM_KEY_OVERVIEW + 1)
#define MESA_SHM_KEY_MAX (MESA_SHM_KEY_MIN + MESA_SHM_RING_QUEUE_NUM -1)
#define MESA_SHM_LOG_BUF_PREFIX_LEN 1024
#define MESA_SHM_RING_QUEUE_INITIAL 0
#define MESA_SHM_RING_QUEUE_IDLE 1
#define MESA_SHM_RING_QUEUE_HALF_IDLE 2
#define MESA_SHM_RING_QUEUE_USED 3
#define MESA_CONSUMER_RUNNING 1
#define MESA_CONSUMER_NOT_RUNNING 0
struct MESA_shm_overview{
int shmkey;
int shmid;
int idx;
int producer_pid;
pthread_mutex_t mutex;
};
struct MESA_shm_queue_head{
unsigned int blksize;
unsigned int blknum;
volatile unsigned int rd_idx;
volatile unsigned int wr_idx;
int ovw_idx;
};
int MESA_shm_alloc_overview(struct MESA_shm_overview **ovw, int *ovw_id, int **consumer_status);
struct MESA_shm_queue_head *MESA_shm_get_ring_queue();
void MESA_shm_init_mutex();
void MESA_shm_init();
void MESA_shm_recycle_ring_queue(struct MESA_shm_queue_head *ring_queue_head);
int MESA_shm_copy_buf_to_ring_queue(char *buf, int buflen, struct MESA_shm_queue_head *head, char *log_file, int log_file_len);
int MESA_shm_ring_queue_is_empty(struct MESA_shm_queue_head *head);
int MESA_shm_ring_queue_is_full(struct MESA_shm_queue_head *head);
void MESA_shm_ring_queue_set_empty(struct MESA_shm_queue_head *head);
int MESA_shm_get_consumer_status();
void MESA_shm_unlink(struct MESA_shm_overview *ovw, int ovw_shmid);
#endif