Mercurial > hg > nginx-quic
view src/os/win32/ngx_os.h @ 6536:f7849bfb6d21
Improved EPOLLRDHUP handling.
When it's known that the kernel supports EPOLLRDHUP, there is no need in
additional recv() call to get EOF or error when the flag is absent in the
event generated by the kernel. A special runtime test is done at startup
to detect if EPOLLRDHUP is actually supported by the kernel because
epoll_ctl() silently ignores unknown flags.
With this knowledge it's now possible to drop the "ready" flag for partial
read. Previously, the "ready" flag was kept until the recv() returned EOF
or error. In particular, this change allows the lingering close heuristics
(which relies on the "ready" flag state) to actually work on Linux, and not
wait for more data in most cases.
The "available" flag is now used in the read event with the semantics similar
to the corresponding counter in kqueue.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 13 May 2016 17:19:23 +0300 |
parents | 3a50ccd94333 |
children | 56fc55e32f23 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_OS_H_INCLUDED_ #define _NGX_OS_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_IO_SENDFILE 1 typedef ssize_t (*ngx_recv_pt)(ngx_connection_t *c, u_char *buf, size_t size); typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in, off_t limit); typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size); typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in, off_t limit); typedef struct { ngx_recv_pt recv; ngx_recv_chain_pt recv_chain; ngx_recv_pt udp_recv; ngx_send_pt send; ngx_send_chain_pt send_chain; ngx_uint_t flags; } ngx_os_io_t; ngx_int_t ngx_os_init(ngx_log_t *log); void ngx_os_status(ngx_log_t *log); ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_pid_t pid); ssize_t ngx_wsarecv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_udp_wsarecv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_udp_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain, off_t limit); ssize_t ngx_wsasend(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_overlapped_wsasend(ngx_connection_t *c, u_char *buf, size_t size); ngx_chain_t *ngx_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); ngx_chain_t *ngx_overlapped_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); void ngx_cdecl ngx_event_log(ngx_err_t err, const char *fmt, ...); extern ngx_os_io_t ngx_os_io; extern ngx_uint_t ngx_ncpu; extern ngx_uint_t ngx_max_wsabufs; extern ngx_int_t ngx_max_sockets; extern ngx_uint_t ngx_inherited_nonblocking; extern ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush; extern ngx_uint_t ngx_win32_version; extern char ngx_unique[]; #endif /* _NGX_OS_H_INCLUDED_ */