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/*
* Copyright (C) Max Romanov
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_PORT_MEMORY_H_INCLUDED_
#define _NXT_PORT_MEMORY_H_INCLUDED_
#define PORT_MMAP_MIN_SIZE (3 * sizeof(uint32_t))
typedef struct nxt_port_mmap_header_s nxt_port_mmap_header_t;
typedef struct nxt_port_mmap_handler_s nxt_port_mmap_handler_t;
void nxt_port_mmaps_destroy(nxt_port_mmaps_t *port_mmaps, nxt_bool_t free_elts);
/*
* Allocates nxt_but_t structure from port's mem_pool, assigns this buf 'mem'
* pointers to first available shared mem bucket(s). 'size' used as a hint to
* acquire several successive buckets if possible.
*
* This function assumes that current thread operates the 'port' exclusively.
*/
nxt_buf_t *
nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_t *port, size_t size);
nxt_int_t nxt_port_mmap_increase_buf(nxt_task_t *task, nxt_buf_t *b,
size_t size, size_t min_size);
nxt_port_mmap_handler_t *
nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process,
nxt_fd_t fd);
void
nxt_port_mmap_write(nxt_task_t *task, nxt_port_t *port,
nxt_port_send_msg_t *msg, nxt_sendbuf_coalesce_t *sb);
void
nxt_port_mmap_read(nxt_task_t *task, nxt_port_t *port,
nxt_port_recv_msg_t *msg);
enum nxt_port_method_e {
NXT_PORT_METHOD_ANY = 0,
NXT_PORT_METHOD_PLAIN,
NXT_PORT_METHOD_MMAP
};
typedef enum nxt_port_method_e nxt_port_method_t;
nxt_port_method_t
nxt_port_mmap_get_method(nxt_task_t *task, nxt_port_t *port, nxt_buf_t *b);
#endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */
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