view src/os/unix/ngx_solaris_init.c @ 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 8f038068f4bc
children 56fc55e32f23
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


char ngx_solaris_sysname[20];
char ngx_solaris_release[10];
char ngx_solaris_version[50];


static ngx_os_io_t ngx_solaris_io = {
    ngx_unix_recv,
    ngx_readv_chain,
    ngx_udp_unix_recv,
    ngx_unix_send,
    ngx_udp_unix_send,
#if (NGX_HAVE_SENDFILE)
    ngx_solaris_sendfilev_chain,
    NGX_IO_SENDFILE
#else
    ngx_writev_chain,
    0
#endif
};


ngx_int_t
ngx_os_specific_init(ngx_log_t *log)
{
    if (sysinfo(SI_SYSNAME, ngx_solaris_sysname, sizeof(ngx_solaris_sysname))
        == -1)
    {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "sysinfo(SI_SYSNAME) failed");
        return NGX_ERROR;
    }

    if (sysinfo(SI_RELEASE, ngx_solaris_release, sizeof(ngx_solaris_release))
        == -1)
    {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "sysinfo(SI_RELEASE) failed");
        return NGX_ERROR;
    }

    if (sysinfo(SI_VERSION, ngx_solaris_version, sizeof(ngx_solaris_version))
        == -1)
    {
        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                      "sysinfo(SI_SYSNAME) failed");
        return NGX_ERROR;
    }


    ngx_os_io = ngx_solaris_io;

    return NGX_OK;
}


void
ngx_os_specific_status(ngx_log_t *log)
{

    ngx_log_error(NGX_LOG_NOTICE, log, 0, "OS: %s %s",
                  ngx_solaris_sysname, ngx_solaris_release);

    ngx_log_error(NGX_LOG_NOTICE, log, 0, "version: %s",
                  ngx_solaris_version);
}