6e31d6cd39
The application process needs to request the shared memory segment from the router instead of the latter pushing the segment before sending a request to the application. This is required to simplify the communication between the router and the application and to prepare the router for using the application shared port and then the queue.
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
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/*
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* Copyright (C) Max Romanov
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* Copyright (C) NGINX, Inc.
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*/
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#ifndef _NXT_PORT_MEMORY_H_INCLUDED_
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#define _NXT_PORT_MEMORY_H_INCLUDED_
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#define PORT_MMAP_MIN_SIZE (3 * sizeof(uint32_t))
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typedef struct nxt_port_mmap_header_s nxt_port_mmap_header_t;
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typedef struct nxt_port_mmap_handler_s nxt_port_mmap_handler_t;
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void nxt_port_mmaps_destroy(nxt_port_mmaps_t *port_mmaps, nxt_bool_t free_elts);
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typedef struct nxt_port_mmap_tracking_s nxt_port_mmap_tracking_t;
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struct nxt_port_mmap_tracking_s {
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void *mmap_handler;
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nxt_atomic_t *tracking;
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};
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nxt_int_t
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nxt_port_mmap_get_tracking(nxt_task_t *task, nxt_port_mmaps_t *mmaps,
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nxt_port_mmap_tracking_t *tracking, uint32_t stream);
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nxt_bool_t
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nxt_port_mmap_tracking_cancel(nxt_task_t *task,
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nxt_port_mmap_tracking_t *tracking, uint32_t stream);
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nxt_int_t
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nxt_port_mmap_tracking_write(uint32_t *buf, nxt_port_mmap_tracking_t *t);
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nxt_bool_t
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nxt_port_mmap_tracking_read(nxt_task_t *task, nxt_port_recv_msg_t *msg);
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/*
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* Allocates nxt_but_t structure from task's thread engine mem_pool, assigns
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* this buf 'mem' pointers to first available shared mem bucket(s). 'size'
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* used as a hint to acquire several successive buckets if possible.
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*/
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nxt_buf_t *
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nxt_port_mmap_get_buf(nxt_task_t *task, nxt_port_mmaps_t *mmaps, size_t size);
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nxt_int_t nxt_port_mmap_increase_buf(nxt_task_t *task, nxt_buf_t *b,
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size_t size, size_t min_size);
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nxt_port_mmap_handler_t *
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nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process,
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nxt_fd_t fd);
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void
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nxt_port_mmap_write(nxt_task_t *task, nxt_port_t *port,
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nxt_port_send_msg_t *msg, nxt_sendbuf_coalesce_t *sb, void *mmsg_buf);
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void
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nxt_port_mmap_read(nxt_task_t *task, nxt_port_recv_msg_t *msg);
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enum nxt_port_method_e {
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NXT_PORT_METHOD_ANY = 0,
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NXT_PORT_METHOD_PLAIN,
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NXT_PORT_METHOD_MMAP
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};
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typedef enum nxt_port_method_e nxt_port_method_t;
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nxt_port_method_t
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nxt_port_mmap_get_method(nxt_task_t *task, nxt_port_t *port, nxt_buf_t *b);
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nxt_int_t nxt_shm_open(nxt_task_t *task, size_t size);
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#endif /* _NXT_PORT_MEMORY_H_INCLUDED_ */
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