xref: /unit/src/nxt_port_memory.h (revision 364:742e5c203c6d)
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 
15 void nxt_port_mmaps_destroy(nxt_port_mmaps_t *port_mmaps, nxt_bool_t free);
16 
17 /*
18  * Allocates nxt_but_t structure from port's mem_pool, assigns this buf 'mem'
19  * pointers to first available shared mem bucket(s). 'size' used as a hint to
20  * acquire several successive buckets if possible.
21  *
22  * This function assumes that current thread operates the 'port' exclusively.
23  */
24 nxt_buf_t *
25 nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_t *port, size_t size);
26 
27 nxt_int_t nxt_port_mmap_increase_buf(nxt_task_t *task, nxt_buf_t *b,
28     size_t size, size_t min_size);
29 
30 nxt_port_mmap_header_t *
31 nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process,
32     nxt_fd_t fd);
33 
34 void
35 nxt_port_mmap_write(nxt_task_t *task, nxt_port_t *port,
36     nxt_port_send_msg_t *msg, nxt_sendbuf_coalesce_t *sb);
37 
38 void
39 nxt_port_mmap_read(nxt_task_t *task, nxt_port_t *port,
40     nxt_port_recv_msg_t *msg);
41 
42 enum nxt_port_method_e {
43     NXT_PORT_METHOD_ANY = 0,
44     NXT_PORT_METHOD_PLAIN,
45     NXT_PORT_METHOD_MMAP
46 };
47 
48 typedef enum nxt_port_method_e nxt_port_method_t;
49 
50 nxt_port_method_t
51 nxt_port_mmap_get_method(nxt_task_t *task, nxt_port_t *port, nxt_buf_t *b);
52 
53 
54 #endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */
55