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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);
typedef struct nxt_port_mmap_tracking_s nxt_port_mmap_tracking_t;
struct nxt_port_mmap_tracking_s {
void *mmap_handler;
nxt_atomic_t *tracking;
};
nxt_int_t
nxt_port_mmap_get_tracking(nxt_task_t *task, nxt_port_mmaps_t *mmaps,
nxt_port_mmap_tracking_t *tracking, uint32_t stream);
nxt_bool_t
nxt_port_mmap_tracking_cancel(nxt_task_t *task,
nxt_port_mmap_tracking_t *tracking, uint32_t stream);
nxt_int_t
nxt_port_mmap_tracking_write(uint32_t *buf, nxt_port_mmap_tracking_t *t);
nxt_bool_t
nxt_port_mmap_tracking_read(nxt_task_t *task, nxt_port_recv_msg_t *msg);
/*
* Allocates nxt_but_t structure from task's thread engine 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.
*/
nxt_buf_t *
nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_mmaps_t *mmaps, 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 *mmsg_buf);
void
nxt_port_mmap_read(nxt_task_t *task, 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);
nxt_int_t nxt_shm_open(nxt_task_t *task, size_t size);
void nxt_process_broadcast_shm_ack(nxt_task_t *task, nxt_process_t *process);
#endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */
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