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 typedef struct nxt_port_mmap_tracking_s nxt_port_mmap_tracking_t; 19 20 struct nxt_port_mmap_tracking_s { 21 void *mmap_handler; 22 nxt_atomic_t *tracking; 23 }; 24 25 nxt_int_t 26 nxt_port_mmap_get_tracking(nxt_task_t *task, nxt_port_t *port, 27 nxt_port_mmap_tracking_t *tracking, uint32_t stream); 28 29 nxt_bool_t 30 nxt_port_mmap_tracking_cancel(nxt_task_t *task, 31 nxt_port_mmap_tracking_t *tracking, uint32_t stream); 32 33 nxt_int_t 34 nxt_port_mmap_tracking_write(uint32_t *buf, nxt_port_mmap_tracking_t *t); 35 36 nxt_bool_t 37 nxt_port_mmap_tracking_read(nxt_task_t *task, nxt_port_recv_msg_t *msg); 38 39 /* 40 * Allocates nxt_but_t structure from port's mem_pool, assigns this buf 'mem' 41 * pointers to first available shared mem bucket(s). 'size' used as a hint to 42 * acquire several successive buckets if possible. 43 * 44 * This function assumes that current thread operates the 'port' exclusively. 45 */ 46 nxt_buf_t * 47 nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_t *port, size_t size); 48 49 nxt_int_t nxt_port_mmap_increase_buf(nxt_task_t *task, nxt_buf_t *b, 50 size_t size, size_t min_size); 51 52 nxt_port_mmap_handler_t * 53 nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process, 54 nxt_fd_t fd); 55 56 void 57 nxt_port_mmap_write(nxt_task_t *task, nxt_port_t *port, 58 nxt_port_send_msg_t *msg, nxt_sendbuf_coalesce_t *sb, void *mmsg_buf); 59 60 void 61 nxt_port_mmap_read(nxt_task_t *task, nxt_port_recv_msg_t *msg); 62 63 enum nxt_port_method_e { 64 NXT_PORT_METHOD_ANY = 0, 65 NXT_PORT_METHOD_PLAIN, 66 NXT_PORT_METHOD_MMAP 67 }; 68 69 typedef enum nxt_port_method_e nxt_port_method_t; 70 71 nxt_port_method_t 72 nxt_port_mmap_get_method(nxt_task_t *task, nxt_port_t *port, nxt_buf_t *b); 73 74 75 #endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */ 76