1 2 /* 3 * Copyright (C) Max Romanov 4 * Copyright (C) NGINX, Inc. 5 */ 6 7 #ifndef _NXT_PORT_MEMORY_H_INCLUDED_ 8 #define _NXT_PORT_MEMORY_H_INCLUDED_ 9 10 11 #define PORT_MMAP_MIN_SIZE (3 * sizeof(uint32_t)) 12 13 typedef struct nxt_port_mmap_header_s nxt_port_mmap_header_t; 14 typedef struct nxt_port_mmap_handler_s nxt_port_mmap_handler_t; 15 16 void nxt_port_mmaps_destroy(nxt_port_mmaps_t *port_mmaps, nxt_bool_t free_elts); 17 18 /* 19 * Allocates nxt_but_t structure from task's thread engine mem_pool, assigns 20 * this buf 'mem' pointers to first available shared mem bucket(s). 'size' 21 * used as a hint to acquire several successive buckets if possible. 22 */ 23 nxt_buf_t * 24 nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_mmaps_t *mmaps, size_t size); 25 26 nxt_int_t nxt_port_mmap_increase_buf(nxt_task_t *task, nxt_buf_t *b, 27 size_t size, size_t min_size); 28 29 nxt_port_mmap_handler_t * 30 nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process, 31 nxt_fd_t fd); 32 33 void 34 nxt_port_mmap_write(nxt_task_t *task, nxt_port_t *port, 35 nxt_port_send_msg_t *msg, nxt_sendbuf_coalesce_t *sb, void *mmsg_buf); 36 37 void 38 nxt_port_mmap_read(nxt_task_t *task, nxt_port_recv_msg_t *msg); 39 40 enum nxt_port_method_e { 41 NXT_PORT_METHOD_ANY = 0, 42 NXT_PORT_METHOD_PLAIN, 43 NXT_PORT_METHOD_MMAP 44 }; 45 46 typedef enum nxt_port_method_e nxt_port_method_t; 47 48 nxt_port_method_t 49 nxt_port_mmap_get_method(nxt_task_t *task, nxt_port_t *port, nxt_buf_t *b); 50 51 nxt_int_t nxt_shm_open(nxt_task_t *task, size_t size); 52 53 void nxt_process_broadcast_shm_ack(nxt_task_t *task, nxt_process_t *process); 54 55 #endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */ 56